From: "Rodrigo R. Galvao" <rosattig@br.ibm.com>
Date: Wed, 11 Oct 2017 08:41:47 +0000
Subject: New patch proposal for PPC64 support

 Create a patch for PPC64 support based on 
https://github.com/LuaJIT/LuaJIT/pull/140.
 It replaces the old patch since this new one is more likely to be merged 
with luajit upstream.


Author: Rodrigo R. Galvao <rosattig@br.ibm.com>
---
 dynasm/dasm_ppc.lua    |    5 +
 src/Makefile           |   11 +-
 src/host/buildvm_asm.c |   16 +-
 src/lj_arch.h          |   18 +-
 src/lj_ccall.c         |  166 ++++++-
 src/lj_ccall.h         |   13 +
 src/lj_ccallback.c     |   68 ++-
 src/lj_ctype.h         |    2 +-
 src/lj_def.h           |    4 +
 src/lj_frame.h         |    9 +
 src/lj_target_ppc.h    |   14 +
 src/vm_ppc.dasc        | 1290 ++++++++++++++++++++++++++++++++----------------
 12 files changed, 1162 insertions(+), 454 deletions(-)

diff --git a/dynasm/dasm_ppc.lua b/dynasm/dasm_ppc.lua
index f73974d..a4ad70b 100644
--- a/dynasm/dasm_ppc.lua
+++ b/dynasm/dasm_ppc.lua
@@ -257,9 +257,11 @@ map_op = {
   addic_3 =	"30000000RRI",
   ["addic._3"] = "34000000RRI",
   addi_3 =	"38000000RR0I",
+  addil_3 =	"38000000RR0J",
   li_2 =	"38000000RI",
   la_2 =	"38000000RD",
   addis_3 =	"3c000000RR0I",
+  addisl_3 =	"3c000000RR0J",
   lis_2 =	"3c000000RI",
   lus_2 =	"3c000000RU",
   bc_3 =	"40000000AAK",
@@ -842,6 +844,9 @@ map_op = {
   srdi_3 =	op_alias("rldicl_4", function(p)
     p[4] = p[3]; p[3] = "64-("..p[3]..")"
   end),
+  ["srdi._3"] =	op_alias("rldicl._4", function(p)
+    p[4] = p[3]; p[3] = "64-("..p[3]..")"
+  end),
   clrldi_3 =	op_alias("rldicl_4", function(p)
     p[4] = p[3]; p[3] = "0"
   end),
diff --git a/src/Makefile b/src/Makefile
index 6b73a89..cc50bae 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -450,7 +450,16 @@ ifeq (ppc,$(TARGET_LJARCH))
     DASM_AFLAGS+= -D GPR64
   endif
   ifeq (PS3,$(TARGET_SYS))
-    DASM_AFLAGS+= -D PPE -D TOC
+    DASM_AFLAGS+= -D PPE
+  endif
+  ifneq (,$(findstring LJ_ARCH_PPC_OPD 1,$(TARGET_TESTARCH)))
+    DASM_AFLAGS+= -D OPD
+  endif
+  ifneq (,$(findstring LJ_ARCH_PPC_OPDENV 1,$(TARGET_TESTARCH)))
+    DASM_AFLAGS+= -D OPDENV
+  endif
+  ifneq (,$(findstring LJ_ARCH_PPC_ELFV2 1,$(TARGET_TESTARCH)))
+    DASM_AFLAGS+= -D ELFV2
   endif
   ifneq (,$(findstring LJ_ARCH_PPC64 ,$(TARGET_TESTARCH)))
     DASM_ARCH= ppc64
diff --git a/src/host/buildvm_asm.c b/src/host/buildvm_asm.c
index ffd1490..6bb995e 100644
--- a/src/host/buildvm_asm.c
+++ b/src/host/buildvm_asm.c
@@ -140,18 +140,14 @@ static void emit_asm_wordreloc(BuildCtx *ctx, uint8_t *p, int n,
 #else
 #define TOCPREFIX ""
 #endif
-  if ((ins >> 26) == 16) {
+  if ((ins >> 26) == 14) {
+    fprintf(ctx->fp, "\taddi %d,%d,%s\n", (ins >> 21) & 31, (ins >> 16) & 31, sym);
+  } else if ((ins >> 26) == 15) {
+    fprintf(ctx->fp, "\taddis %d,%d,%s\n", (ins >> 21) & 31, (ins >> 16) & 31, sym);
+  } else if ((ins >> 26) == 16) {
     fprintf(ctx->fp, "\t%s %d, %d, " TOCPREFIX "%s\n",
 	    (ins & 1) ? "bcl" : "bc", (ins >> 21) & 31, (ins >> 16) & 31, sym);
   } else if ((ins >> 26) == 18) {
-#if LJ_ARCH_PPC64
-    const char *suffix = strchr(sym, '@');
-    if (suffix && suffix[1] == 'h') {
-      fprintf(ctx->fp, "\taddis 11, 2, %s\n", sym);
-    } else if (suffix && suffix[1] == 'l') {
-      fprintf(ctx->fp, "\tld 12, %s\n", sym);
-    } else
-#endif
     fprintf(ctx->fp, "\t%s " TOCPREFIX "%s\n", (ins & 1) ? "bl" : "b", sym);
   } else {
     fprintf(stderr,
@@ -250,7 +246,7 @@ void emit_asm(BuildCtx *ctx)
   int i, rel;
 
   fprintf(ctx->fp, "\t.file \"buildvm_%s.dasc\"\n", ctx->dasm_arch);
-#if LJ_ARCH_PPC64
+#if LJ_ARCH_PPC_ELFV2
   fprintf(ctx->fp, "\t.abiversion 2\n");
 #endif
   fprintf(ctx->fp, "\t.text\n");
diff --git a/src/lj_arch.h b/src/lj_arch.h
index d609b37..53bc651 100644
--- a/src/lj_arch.h
+++ b/src/lj_arch.h
@@ -267,10 +267,18 @@
 #if LJ_TARGET_CONSOLE
 #define LJ_ARCH_PPC32ON64	1
 #define LJ_ARCH_NOFFI		1
+#if LJ_TARGET_PS3
+#define LJ_ARCH_PPC_OPD		1
+#endif
 #elif LJ_ARCH_BITS == 64
-#define LJ_ARCH_PPC64		1
-#define LJ_TARGET_GC64		1
+#define LJ_ARCH_PPC32ON64	1
 #define LJ_ARCH_NOJIT		1	/* NYI */
+#if _CALL_ELF == 2
+#define LJ_ARCH_PPC_ELFV2	1
+#else
+#define LJ_ARCH_PPC_OPD		1
+#define LJ_ARCH_PPC_OPDENV	1
+#endif
 #endif
 
 #if _ARCH_PWR7
@@ -421,12 +429,6 @@
 #if defined(_SOFT_FLOAT) || defined(_SOFT_DOUBLE)
 #error "No support for PowerPC CPUs without double-precision FPU"
 #endif
-#if !LJ_ARCH_PPC64 && LJ_ARCH_ENDIAN == LUAJIT_LE
-#error "No support for little-endian PPC32"
-#endif
-#if LJ_ARCH_PPC64
-#error "No support for PowerPC 64 bit mode (yet)"
-#endif
 #ifdef __NO_FPRS__
 #error "No support for PPC/e500 anymore (use LuaJIT 2.0)"
 #endif
diff --git a/src/lj_ccall.c b/src/lj_ccall.c
index 5c252e5..b891591 100644
--- a/src/lj_ccall.c
+++ b/src/lj_ccall.c
@@ -369,21 +369,97 @@
 #elif LJ_TARGET_PPC
 /* -- PPC calling conventions --------------------------------------------- */
 
+#if LJ_ARCH_BITS == 64
+
+#if LJ_ARCH_PPC_ELFV2
+
+#define CCALL_HANDLE_STRUCTRET \
+  if (sz > 16 && ccall_classify_fp(cts, ctr) <= 0) { \
+    cc->retref = 1;  /* Return by reference. */ \
+    cc->gpr[ngpr++] = (GPRArg)dp; \
+  }
+
+#define CCALL_HANDLE_STRUCTRET2 \
+  int isfp = ccall_classify_fp(cts, ctr); \
+  int i; \
+  if (isfp == FTYPE_FLOAT) { \
+    for (i = 0; i < ctr->size / 4; i++) \
+      ((float *)dp)[i] = cc->fpr[i]; \
+  } else if (isfp == FTYPE_DOUBLE) { \
+    for (i = 0; i < ctr->size / 8; i++) \
+      ((double *)dp)[i] = cc->fpr[i]; \
+  } else { \
+    if (ctr->size < 8 && LJ_BE) { \
+      sp += 8 - ctr->size; \
+    } \
+    memcpy(dp, sp, ctr->size); \
+  }
+
+#else
+
 #define CCALL_HANDLE_STRUCTRET \
   cc->retref = 1;  /* Return all structs by reference. */ \
   cc->gpr[ngpr++] = (GPRArg)dp;
 
+#endif
+
 #define CCALL_HANDLE_COMPLEXRET \
   /* Complex values are returned in 2 or 4 GPRs. */ \
   cc->retref = 0;
 
+#define CCALL_HANDLE_STRUCTARG
+
 #define CCALL_HANDLE_COMPLEXRET2 \
-  memcpy(dp, sp, ctr->size);  /* Copy complex from GPRs. */
+  if (ctr->size == 2*sizeof(float)) {  /* Copy complex float from FPRs. */ \
+    ((float *)dp)[0] = cc->fpr[0]; \
+    ((float *)dp)[1] = cc->fpr[1]; \
+  } else {  /* Copy complex double from FPRs. */ \
+    ((double *)dp)[0] = cc->fpr[0]; \
+    ((double *)dp)[1] = cc->fpr[1]; \
+  }
+
+#define CCALL_HANDLE_COMPLEXARG \
+  isfp = 1; \
+  if (d->size == sizeof(float) * 2) { \
+    d = ctype_get(cts, CTID_COMPLEX_DOUBLE); \
+    isf32 = 1; \
+  }
+
+#define CCALL_HANDLE_REGARG \
+  if (isfp && d->size == sizeof(float)) { \
+    d = ctype_get(cts, CTID_DOUBLE); \
+    isf32 = 1; \
+  } \
+  if (ngpr < maxgpr) { \
+   dp = &cc->gpr[ngpr]; \
+   ngpr += n; \
+   if (ngpr > maxgpr) { \
+     nsp += ngpr - 8; \
+     ngpr = 8; \
+     if (nsp > CCALL_MAXSTACK) { \
+       goto err_nyi; \
+     } \
+   } \
+   goto done; \
+  }
+
+#else
+
+#define CCALL_HANDLE_STRUCTRET \
+  cc->retref = 1;  /* Return all structs by reference. */ \
+  cc->gpr[ngpr++] = (GPRArg)dp;
+
+#define CCALL_HANDLE_COMPLEXRET \
+  /* Complex values are returned in 2 or 4 GPRs. */ \
+  cc->retref = 0;
 
 #define CCALL_HANDLE_STRUCTARG \
   rp = cdataptr(lj_cdata_new(cts, did, sz)); \
   sz = CTSIZE_PTR;  /* Pass all structs by reference. */
 
+#define CCALL_HANDLE_COMPLEXRET2 \
+  memcpy(dp, sp, ctr->size);  /* Copy complex from GPRs. */
+
 #define CCALL_HANDLE_COMPLEXARG \
   /* Pass complex by value in 2 or 4 GPRs. */
 
@@ -410,6 +486,8 @@
     } \
   }
 
+#endif
+
 #define CCALL_HANDLE_RET \
   if (ctype_isfp(ctr->info) && ctr->size == sizeof(float)) \
     ctr = ctype_get(cts, CTID_DOUBLE);  /* FPRs always hold doubles. */
@@ -801,6 +879,50 @@ noth:  /* Not a homogeneous float/double aggregate. */
 
 #endif
 
+/* -- PowerPC64 ELFv2 ABI struct classification ------------------- */
+
+#if LJ_ARCH_PPC_ELFV2
+
+#define FTYPE_FLOAT	1
+#define FTYPE_DOUBLE	2
+
+static unsigned int ccall_classify_fp(CTState *cts, CType *ct) {
+  if (ctype_isfp(ct->info)) {
+    if (ct->size == sizeof(float))
+      return FTYPE_FLOAT;
+    else
+      return FTYPE_DOUBLE;
+  } else if (ctype_iscomplex(ct->info)) {
+    if (ct->size == sizeof(float) * 2)
+      return FTYPE_FLOAT;
+    else
+      return FTYPE_DOUBLE;
+  } else if (ctype_isstruct(ct->info)) {
+    int res = -1;
+    int sz = ct->size;
+    while (ct->sib) {
+      ct = ctype_get(cts, ct->sib);
+      if (ctype_isfield(ct->info)) {
+        int sub = ccall_classify_fp(cts, ctype_rawchild(cts, ct));
+        if (res == -1)
+          res = sub;
+        if (sub != -1 && sub != res)
+          return 0;
+      } else if (ctype_isbitfield(ct->info) ||
+        ctype_isxattrib(ct->info, CTA_SUBTYPE)) {
+        return 0;
+      }
+    }
+    if (res > 0 && sz > res * 4 * 8)
+      return 0;
+    return res;
+  } else {
+    return 0;
+  }
+}
+
+#endif
+
 /* -- MIPS64 ABI struct classification ---------------------------- */
 
 #if LJ_TARGET_MIPS64
@@ -974,6 +1096,9 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
     CTSize sz;
     MSize n, isfp = 0, isva = 0;
     void *dp, *rp = NULL;
+#if LJ_TARGET_PPC && LJ_ARCH_BITS == 64
+    int isf32 = 0;
+#endif
 
     if (fid) {  /* Get argument type from field. */
       CType *ctf = ctype_get(cts, fid);
@@ -1030,7 +1155,37 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
       *(void **)dp = rp;
       dp = rp;
     }
+#if LJ_TARGET_PPC && LJ_ARCH_BITS == 64 && LJ_BE
+    if (ctype_isstruct(d->info) && sz < CTSIZE_PTR) {
+      dp = (char *)dp + (CTSIZE_PTR - sz);
+    }
+#endif
     lj_cconv_ct_tv(cts, d, (uint8_t *)dp, o, CCF_ARG(narg));
+#if LJ_TARGET_PPC && LJ_ARCH_BITS == 64
+    if (isfp) {
+      int i;
+      for (i = 0; i < d->size / 8 && nfpr < CCALL_NARG_FPR; i++)
+        cc->fpr[nfpr++] = ((double *)dp)[i];
+    }
+    if (isf32) {
+      int i;
+      for (i = 0; i < d->size / 8; i++)
+        ((float *)dp)[i*2] = ((double *)dp)[i];
+    }
+#endif
+#if LJ_ARCH_PPC_ELFV2
+    if (ctype_isstruct(d->info)) {
+      isfp = ccall_classify_fp(cts, d);
+      int i;
+      if (isfp == FTYPE_FLOAT) {
+        for (i = 0; i < d->size / 4 && nfpr < CCALL_NARG_FPR; i++)
+          cc->fpr[nfpr++] = ((float *)dp)[i];
+      } else if (isfp == FTYPE_DOUBLE) {
+        for (i = 0; i < d->size / 8 && nfpr < CCALL_NARG_FPR; i++)
+          cc->fpr[nfpr++] = ((double *)dp)[i];
+      }
+    }
+#endif
     /* Extend passed integers to 32 bits at least. */
     if (ctype_isinteger_or_bool(d->info) && d->size < 4) {
       if (d->info & CTF_UNSIGNED)
@@ -1044,6 +1199,15 @@ static int ccall_set_args(lua_State *L, CTState *cts, CType *ct,
     if (isfp && d->size == sizeof(float))
       ((float *)dp)[1] = ((float *)dp)[0];  /* Floats occupy high slot. */
 #endif
+#if LJ_TARGET_PPC && LJ_ARCH_BITS == 64
+    if ((ctype_isinteger_or_bool(d->info) || ctype_isenum(d->info))
+	&& d->size <= 4) {
+      if (d->info & CTF_UNSIGNED)
+	*(uint64_t *)dp = (uint64_t)*(uint32_t *)dp;
+      else
+        *(int64_t *)dp = (int64_t)*(int32_t *)dp;
+    }
+#endif
 #if LJ_TARGET_MIPS64 || (LJ_TARGET_ARM64 && LJ_BE)
     if ((ctype_isinteger_or_bool(d->info) || ctype_isenum(d->info)
 #if LJ_TARGET_MIPS64
diff --git a/src/lj_ccall.h b/src/lj_ccall.h
index 59f6648..bbf309f 100644
--- a/src/lj_ccall.h
+++ b/src/lj_ccall.h
@@ -86,10 +86,23 @@ typedef union FPRArg {
 #elif LJ_TARGET_PPC
 
 #define CCALL_NARG_GPR		8
+#if LJ_ARCH_BITS == 64
+#define CCALL_NARG_FPR		13
+#if LJ_ARCH_PPC_ELFV2
+#define CCALL_NRET_GPR		2
+#define CCALL_NRET_FPR		8
+#define CCALL_SPS_EXTRA		14
+#else
+#define CCALL_NRET_GPR		1
+#define CCALL_NRET_FPR		2
+#define CCALL_SPS_EXTRA		16
+#endif
+#else
 #define CCALL_NARG_FPR		8
 #define CCALL_NRET_GPR		4	/* For complex double. */
 #define CCALL_NRET_FPR		1
 #define CCALL_SPS_EXTRA		4
+#endif
 #define CCALL_SPS_FREE		0
 
 typedef intptr_t GPRArg;
diff --git a/src/lj_ccallback.c b/src/lj_ccallback.c
index 846827b..eb7f445 100644
--- a/src/lj_ccallback.c
+++ b/src/lj_ccallback.c
@@ -61,8 +61,24 @@ static MSize CALLBACK_OFS2SLOT(MSize ofs)
 
 #elif LJ_TARGET_PPC
 
+#if LJ_ARCH_PPC_OPD
+
+#define CALLBACK_SLOT2OFS(slot)		(24*(slot))
+#define CALLBACK_OFS2SLOT(ofs)		((ofs)/24)
+#define CALLBACK_MAX_SLOT		(CALLBACK_OFS2SLOT(CALLBACK_MCODE_SIZE))
+
+#elif LJ_ARCH_PPC_ELFV2
+
+#define CALLBACK_SLOT2OFS(slot)		(4*(slot))
+#define CALLBACK_OFS2SLOT(ofs)		((ofs)/4)
+#define CALLBACK_MAX_SLOT		(CALLBACK_MCODE_SIZE/4 - 10)
+
+#else
+
 #define CALLBACK_MCODE_HEAD		24
 
+#endif
+
 #elif LJ_TARGET_MIPS32
 
 #define CALLBACK_MCODE_HEAD		20
@@ -188,24 +204,59 @@ static void callback_mcode_init(global_State *g, uint32_t *page)
   lua_assert(p - page <= CALLBACK_MCODE_SIZE);
 }
 #elif LJ_TARGET_PPC
+#if LJ_ARCH_PPC_OPD
+register void *vm_toc __asm__("r2");
+static void callback_mcode_init(global_State *g, uint64_t *page)
+{
+  uint64_t *p = page;
+  void *target = (void *)lj_vm_ffi_callback;
+  MSize slot;
+  for (slot = 0; slot < CALLBACK_MAX_SLOT; slot++) {
+    *p++ = (uint64_t)target;
+    *p++ = (uint64_t)vm_toc;
+    *p++ = (uint64_t)g | ((uint64_t)slot << 47);
+  }
+  lua_assert(p - page <= CALLBACK_MCODE_SIZE / 8);
+}
+#else
 static void callback_mcode_init(global_State *g, uint32_t *page)
 {
   uint32_t *p = page;
   void *target = (void *)lj_vm_ffi_callback;
   MSize slot;
+#if LJ_ARCH_PPC_ELFV2
+  // Needs to be in sync with lj_vm_ffi_callback.
+  lua_assert(CALLBACK_MCODE_SIZE == 4096);
+  for (slot = 0; slot < CALLBACK_MAX_SLOT; slot++) {
+    *p = PPCI_B | (((page+CALLBACK_MAX_SLOT-p) & 0x00ffffffu) << 2);
+    p++;
+  }
+  *p++ = PPCI_LI | PPCF_T(RID_SYS1) | ((((intptr_t)target) >> 32) & 0xffff);
+  *p++ = PPCI_LI | PPCF_T(RID_R11) | ((((intptr_t)g) >> 32) & 0xffff);
+  *p++ = PPCI_RLDICR | PPCF_T(RID_SYS1) | PPCF_A(RID_SYS1) | PPCF_SH(32) | PPCF_M6(63-32);  /* sldi */
+  *p++ = PPCI_RLDICR | PPCF_T(RID_R11) | PPCF_A(RID_R11) | PPCF_SH(32) | PPCF_M6(63-32);  /* sldi */
+  *p++ = PPCI_ORIS | PPCF_A(RID_SYS1) | PPCF_T(RID_SYS1) | ((((intptr_t)target) >> 16) & 0xffff);
+  *p++ = PPCI_ORIS | PPCF_A(RID_R11) | PPCF_T(RID_R11) | ((((intptr_t)g) >> 16) & 0xffff);
+  *p++ = PPCI_ORI | PPCF_A(RID_SYS1) | PPCF_T(RID_SYS1) | (((intptr_t)target) & 0xffff);
+  *p++ = PPCI_ORI | PPCF_A(RID_R11) | PPCF_T(RID_R11) | (((intptr_t)g) & 0xffff);
+  *p++ = PPCI_MTCTR | PPCF_T(RID_SYS1);
+  *p++ = PPCI_BCTR;
+#else
   *p++ = PPCI_LIS | PPCF_T(RID_TMP) | (u32ptr(target) >> 16);
-  *p++ = PPCI_LIS | PPCF_T(RID_R12) | (u32ptr(g) >> 16);
+  *p++ = PPCI_LIS | PPCF_T(RID_R11) | (u32ptr(g) >> 16);
   *p++ = PPCI_ORI | PPCF_A(RID_TMP)|PPCF_T(RID_TMP) | (u32ptr(target) & 0xffff);
-  *p++ = PPCI_ORI | PPCF_A(RID_R12)|PPCF_T(RID_R12) | (u32ptr(g) & 0xffff);
+  *p++ = PPCI_ORI | PPCF_A(RID_R11)|PPCF_T(RID_R11) | (u32ptr(g) & 0xffff);
   *p++ = PPCI_MTCTR | PPCF_T(RID_TMP);
   *p++ = PPCI_BCTR;
   for (slot = 0; slot < CALLBACK_MAX_SLOT; slot++) {
-    *p++ = PPCI_LI | PPCF_T(RID_R11) | slot;
+    *p++ = PPCI_LI | PPCF_T(RID_R12) | slot;
     *p = PPCI_B | (((page-p) & 0x00ffffffu) << 2);
     p++;
   }
-  lua_assert(p - page <= CALLBACK_MCODE_SIZE);
+#endif
+  lua_assert(p - page <= CALLBACK_MCODE_SIZE / 4);
 }
+#endif
 #elif LJ_TARGET_MIPS
 static void callback_mcode_init(global_State *g, uint32_t *page)
 {
@@ -641,6 +692,15 @@ static void callback_conv_result(CTState *cts, lua_State *L, TValue *o)
 	*(int32_t *)dp = ctr->size == 1 ? (int32_t)*(int8_t *)dp :
 					  (int32_t)*(int16_t *)dp;
     }
+#if LJ_TARGET_PPC && LJ_ARCH_BITS == 64
+    if (ctr->size <= 4 &&
+       (ctype_isinteger_or_bool(ctr->info) || ctype_isenum(ctr->info))) {
+      if (ctr->info & CTF_UNSIGNED)
+        *(uint64_t *)dp = (uint64_t)*(uint32_t *)dp;
+      else
+        *(int64_t *)dp = (int64_t)*(int32_t *)dp;
+    }
+#endif
 #if LJ_TARGET_MIPS64 || (LJ_TARGET_ARM64 && LJ_BE)
     /* Always sign-extend results to 64 bits. Even a soft-fp 'float'. */
     if (ctr->size <= 4 &&
diff --git a/src/lj_ctype.h b/src/lj_ctype.h
index 0c220a8..105865b 100644
--- a/src/lj_ctype.h
+++ b/src/lj_ctype.h
@@ -153,7 +153,7 @@ typedef struct CType {
 
 /* Simplify target-specific configuration. Checked in lj_ccall.h. */
 #define CCALL_MAX_GPR		8
-#define CCALL_MAX_FPR		8
+#define CCALL_MAX_FPR		14
 
 typedef LJ_ALIGN(8) union FPRCBArg { double d; float f[2]; } FPRCBArg;
 
diff --git a/src/lj_def.h b/src/lj_def.h
index 2d8fff6..381d6f5 100644
--- a/src/lj_def.h
+++ b/src/lj_def.h
@@ -71,7 +71,11 @@ typedef unsigned int uintptr_t;
 #define LJ_MAX_IDXCHAIN	100		/* __index/__newindex chain limit. */
 #define LJ_STACK_EXTRA	(5+2*LJ_FR2)	/* Extra stack space (metamethods). */
 
+#if defined(__powerpc64__) && _CALL_ELF != 2
+#define LJ_NUM_CBPAGE	4		/* Number of FFI callback pages. */
+#else
 #define LJ_NUM_CBPAGE	1		/* Number of FFI callback pages. */
+#endif
 
 /* Minimum table/buffer sizes. */
 #define LJ_MIN_GLOBAL	6		/* Min. global table size (hbits). */
diff --git a/src/lj_frame.h b/src/lj_frame.h
index 19c49a4..c666418 100644
--- a/src/lj_frame.h
+++ b/src/lj_frame.h
@@ -210,6 +210,15 @@ enum { LJ_CONT_TAILCALL, LJ_CONT_FFI_CALLBACK };  /* Special continuations. */
 #define CFRAME_OFS_MULTRES	408
 #define CFRAME_SIZE		384
 #define CFRAME_SHIFT_MULTRES	3
+#elif LJ_ARCH_PPC_ELFV2
+#define CFRAME_OFS_ERRF		360
+#define CFRAME_OFS_NRES		356
+#define CFRAME_OFS_PREV		336
+#define CFRAME_OFS_L		352
+#define CFRAME_OFS_PC		348
+#define CFRAME_OFS_MULTRES	344
+#define CFRAME_SIZE		368
+#define CFRAME_SHIFT_MULTRES	3
 #elif LJ_ARCH_PPC32ON64
 #define CFRAME_OFS_ERRF		472
 #define CFRAME_OFS_NRES		468
diff --git a/src/lj_target_ppc.h b/src/lj_target_ppc.h
index c5c991a..f0c8c94 100644
--- a/src/lj_target_ppc.h
+++ b/src/lj_target_ppc.h
@@ -30,8 +30,13 @@ enum {
 
   /* Calling conventions. */
   RID_RET = RID_R3,
+#if LJ_LE
+  RID_RETHI = RID_R4,
+  RID_RETLO = RID_R3,
+#else
   RID_RETHI = RID_R3,
   RID_RETLO = RID_R4,
+#endif
   RID_FPRET = RID_F1,
 
   /* These definitions must match with the *.dasc file(s): */
@@ -131,6 +136,8 @@ static LJ_AINLINE uint32_t *exitstub_trace_addr_(uint32_t *p, uint32_t exitno)
 #define PPCF_C(r)	((r) << 6)
 #define PPCF_MB(n)	((n) << 6)
 #define PPCF_ME(n)	((n) << 1)
+#define PPCF_SH(n)	((((n) & 31) << (11+1)) | (((n) & 32) >> (5-1)))
+#define PPCF_M6(n)	((((n) & 31) << (5+1)) | (((n) & 32) << (11-5)))
 #define PPCF_Y		0x00200000
 #define PPCF_DOT	0x00000001
 
@@ -200,6 +207,13 @@ typedef enum PPCIns {
   PPCI_RLWINM = 0x54000000,
   PPCI_RLWIMI = 0x50000000,
 
+  PPCI_RLDICL = 0x78000000,
+  PPCI_RLDICR = 0x78000004,
+  PPCI_RLDIC = 0x78000008,
+  PPCI_RLDIMI = 0x7800000c,
+  PPCI_RLDCL = 0x78000010,
+  PPCI_RLDCR = 0x78000012,
+
   PPCI_B = 0x48000000,
   PPCI_BL = 0x48000001,
   PPCI_BC = 0x40800000,
diff --git a/src/vm_ppc.dasc b/src/vm_ppc.dasc
index b4260eb..abb381e 100644
--- a/src/vm_ppc.dasc
+++ b/src/vm_ppc.dasc
@@ -22,35 +22,40 @@
 |// GPR64   64 bit registers (but possibly 32 bit pointers, e.g. PS3).
 |//         Affects reg saves, stack layout, carry/overflow/dot flags etc.
 |// FRAME32 Use 32 bit frame layout, even with GPR64 (Xbox 360).
-|// TOC     Need table of contents (64 bit or 32 bit variant, e.g. PS3).
+|// OPD     Need function descriptors (64 bit or 32 bit variant, e.g. PS3).
 |//         Function pointers are really a struct: code, TOC, env (optional).
-|// TOCENV  Function pointers have an environment pointer, too (not on PS3).
+|// OPDENV  Function pointers have an environment pointer, too (not on PS3).
+|// ELFV2   The 64-bit ELF V2 ABI is in use.
 |// PPE     Power Processor Element of Cell (PS3) or Xenon (Xbox 360).
 |//         Must avoid (slow) micro-coded instructions.
 |
 |.if P64
-|.define TOC, 1
-|.define TOCENV, 1
 |.macro lpx, a, b, c; ldx a, b, c; .endmacro
 |.macro lp, a, b; ld a, b; .endmacro
 |.macro stp, a, b; std a, b; .endmacro
+|.macro stpx, a, b, c; stdx a, b, c; .endmacro
 |.define decode_OPP, decode_OP8
-|.if FFI
-|// Missing: Calling conventions, 64 bit regs, TOC.
-|.error lib_ffi not yet implemented for PPC64
-|.endif
+|.define PSIZE, 8
 |.else
 |.macro lpx, a, b, c; lwzx a, b, c; .endmacro
 |.macro lp, a, b; lwz a, b; .endmacro
 |.macro stp, a, b; stw a, b; .endmacro
+|.macro stpx, a, b, c; stwx a, b, c; .endmacro
 |.define decode_OPP, decode_OP4
+|.define PSIZE, 4
 |.endif
 |
 |// Convenience macros for TOC handling.
-|.if TOC
+|.if OPD or ELFV2
 |// Linker needs a TOC patch area for every external call relocation.
-|.macro blex, target; bl extern target@plt; nop; .endmacro
+|.macro blex, target; bl extern target; nop; .endmacro
 |.macro .toc, a, b; a, b; .endmacro
+|.else
+|.macro blex, target; bl extern target@plt; .endmacro
+|.macro .toc, a, b; .endmacro
+|.endif
+|.if OPD
+|.macro .opd, a, b; a, b; .endmacro
 |.if P64
 |.define TOC_OFS,	 8
 |.define ENV_OFS,	16
@@ -58,13 +63,13 @@
 |.define TOC_OFS,	4
 |.define ENV_OFS,	8
 |.endif
-|.else  // No TOC.
-|.macro blex, target; bl extern target@plt; .endmacro
-|.macro .toc, a, b; .endmacro
+|.else  // No OPD.
+|.macro .opd, a, b; .endmacro
 |.endif
-|.macro .tocenv, a, b; .if TOCENV; a, b; .endif; .endmacro
+|.macro .opdenv, a, b; .if OPDENV; a, b; .endif; .endmacro
 |
 |.macro .gpr64, a, b; .if GPR64; a, b; .endif; .endmacro
+|.macro .elfv2, a, b; .if ELFV2; a, b; .endif; .endmacro
 |
 |.macro andix., y, a, i
 |.if PPE
@@ -75,29 +80,6 @@
 |.endif
 |.endmacro
 |
-|.macro clrso, reg
-|.if PPE
-|  li reg, 0
-|  mtxer reg
-|.else
-|  mcrxr cr0
-|.endif
-|.endmacro
-|
-|.macro checkov, reg, noov
-|.if PPE
-|  mfxer reg
-|  add reg, reg, reg
-|  cmpwi reg, 0
-|   li reg, 0
-|   mtxer reg
-|  bgey noov
-|.else
-|  mcrxr cr0
-|  bley noov
-|.endif
-|.endmacro
-|
 |//-----------------------------------------------------------------------
 |
 |// Fixed register assignments for the interpreter.
@@ -111,6 +93,7 @@
 |.define LREG,		r18	// Register holding lua_State (also in SAVE_L).
 |.define MULTRES,	r19	// Size of multi-result: (nresults+1)*8.
 |.define JGL,		r31	// On-trace: global_State + 32768.
+|.define BASEP4,	r25	// Equal to BASE + 4
 |
 |// Constants for type-comparisons, stores and conversions. C callee-save.
 |.define TISNUM,	r22
@@ -143,12 +126,19 @@
 |
 |.define FARG1,		f1
 |.define FARG2,		f2
+|.define FARG3,		f3
+|.define FARG4,		f4
+|.define FARG5,		f5
+|.define FARG6,		f6
+|.define FARG7,		f7
+|.define FARG8,		f8
 |
 |.define CRET1,		r3
 |.define CRET2,		r4
 |
 |.define TOCREG,	r2	// TOC register (only used by C code).
 |.define ENVREG,	r11	// Environment pointer (nested C functions).
+|.define FUNCREG,	r12	// ELFv2 function pointer (overlaps RD)
 |
 |// Stack layout while in interpreter. Must match with lj_frame.h.
 |.if GPR64
@@ -182,6 +172,49 @@
 |.define TMPD,		TMPD_HI
 |.define TONUM_D,	TONUM_HI
 |
+|.elif ELFV2
+|
+|//			392(sp) // \ 32 bit C frame info.
+|.define SAVE_LR,	384(sp)
+|.define SAVE_CR,	376(sp) // 64 bit CR save.
+|.define CFRAME_SPACE,	368     // Delta for sp.
+|// Back chain for sp:	368(sp) <-- sp entering interpreter
+|.define SAVE_ERRF,	360(sp) // |
+|.define SAVE_NRES,	356(sp) // |
+|.define SAVE_L,	352(sp) //  > Parameter save area.
+|.define SAVE_PC,	348(sp) // |
+|.define SAVE_MULTRES,	344(sp) // |
+|.define SAVE_CFRAME,	336(sp) // / 64 bit C frame chain.
+|.define SAVE_FPR_,	192     // .. 192+18*8: 64 bit FPR saves.
+|.define SAVE_GPR_,	48      // .. 48+18*8: 64 bit GPR saves.
+|.if ENDIAN_LE
+|.define TMPD_HI,	44(sp)
+|.define TMPD_LO,	40(sp)
+|.define TONUM_HI,	36(sp)
+|.define TONUM_LO,	32(sp)
+|.else
+|.define TMPD_LO,	44(sp)
+|.define TMPD_HI,	40(sp)
+|.define TONUM_LO,	36(sp)
+|.define TONUM_HI,	32(sp)
+|.endif
+|.define SAVE_TOC,	24(sp)  // TOC save area.
+|// Next frame lr:	16(sp)
+|// Next frame cr:	8(sp)
+|// Back chain for sp:	0(sp)	<-- sp while in interpreter
+|
+|.if ENDIAN_LE
+|.define TMPD_BLO,	32(sp)
+|.define TMPD,		TMPD_LO
+|.define TONUM_D,	TONUM_LO
+|.else
+|.define TMPD_BLO,	39(sp)
+|.define TMPD,		TMPD_HI
+|.define TONUM_D,	TONUM_HI
+|.endif
+|
+|.define EXIT_OFFSET,	32
+|
 |.else
 |
 |//			508(sp) // \ 32 bit C frame info.
@@ -192,23 +225,39 @@
 |.define SAVE_MULTRES,	456(sp) // |
 |.define SAVE_CFRAME,	448(sp) // / 64 bit C frame chain.
 |.define SAVE_LR,	416(sp)
+|.define SAVE_CR,	408(sp)  // 64 bit CR save.
 |.define CFRAME_SPACE,	400     // Delta for sp.
 |// Back chain for sp:	400(sp) <-- sp entering interpreter
 |.define SAVE_FPR_,	256     // .. 256+18*8: 64 bit FPR saves.
 |.define SAVE_GPR_,	112     // .. 112+18*8: 64 bit GPR saves.
 |//			48(sp)  // Callee parameter save area (ABI mandated).
 |.define SAVE_TOC,	40(sp)  // TOC save area.
+|.if ENDIAN_LE
+|.define TMPD_HI,	36(sp)  // \ Link editor temp (ABI mandated).
+|.define TMPD_LO,	32(sp)  // /
+|.define TONUM_HI,	28(sp)  // \ Compiler temp (ABI mandated).
+|.define TONUM_LO,	24(sp)  // /
+|.else
 |.define TMPD_LO,	36(sp)  // \ Link editor temp (ABI mandated).
 |.define TMPD_HI,	32(sp)  // /
 |.define TONUM_LO,	28(sp)  // \ Compiler temp (ABI mandated).
 |.define TONUM_HI,	24(sp)  // /
+|.endif
 |// Next frame lr:	16(sp)
-|.define SAVE_CR,	8(sp)  // 64 bit CR save.
+|// Next frame cr:	8(sp)
 |// Back chain for sp:	0(sp)	<-- sp while in interpreter
 |
+|.if ENDIAN_LE
+|.define TMPD_BLO,	32(sp)
+|.define TMPD,		TMPD_LO
+|.define TONUM_D,	TONUM_LO
+|.else
 |.define TMPD_BLO,	39(sp)
 |.define TMPD,		TMPD_HI
 |.define TONUM_D,	TONUM_HI
+|.endif
+|
+|.define EXIT_OFFSET,	112
 |
 |.endif
 |.else
@@ -226,16 +275,31 @@
 |.define SAVE_PC,	32(sp)
 |.define SAVE_MULTRES,	28(sp)
 |.define UNUSED1,	24(sp)
+|.if ENDIAN_LE
+|.define TMPD_HI,	20(sp)
+|.define TMPD_LO,	16(sp)
+|.define TONUM_HI,	12(sp)
+|.define TONUM_LO,	8(sp)
+|.else
 |.define TMPD_LO,	20(sp)
 |.define TMPD_HI,	16(sp)
 |.define TONUM_LO,	12(sp)
 |.define TONUM_HI,	8(sp)
+|.endif
 |// Next frame lr:	4(sp)
 |// Back chain for sp:	0(sp)	<-- sp while in interpreter
 |
+|.if ENDIAN_LE
+|.define TMPD_BLO,	16(sp)
+|.define TMPD,		TMPD_LO
+|.define TONUM_D,	TONUM_LO
+|.else
 |.define TMPD_BLO,	23(sp)
 |.define TMPD,		TMPD_HI
 |.define TONUM_D,	TONUM_HI
+|.endif
+|
+|.define EXIT_OFFSET,	16
 |
 |.endif
 |
@@ -350,8 +414,35 @@
 |//-----------------------------------------------------------------------
 |
 |// Access to frame relative to BASE.
+|.if ENDIAN_LE
+|.define FRAME_PC,	-4
+|.define FRAME_FUNC,	-8
+|.define FRAME_CONTPC,	-12
+|.define FRAME_CONTRET,	-16
+|.define WORD_LO,	0
+|.define WORD_HI,	4
+|.define WORD_BLO,	0
+|.define BASE_LO,	BASE
+|.define BASE_HI,	BASEP4
+|.macro lwzux2, hi, lo, base, idx
+|  lwzux lo, base, idx
+|  lwz hi, 4(base)
+|.endmacro
+|.else
 |.define FRAME_PC,	-8
 |.define FRAME_FUNC,	-4
+|.define FRAME_CONTPC,	-16
+|.define FRAME_CONTRET,	-12
+|.define WORD_LO,	4
+|.define WORD_HI,	0
+|.define WORD_BLO,	7
+|.define BASE_LO,	BASEP4
+|.define BASE_HI,	BASE
+|.macro lwzux2, hi, lo, base, idx
+|  lwzux hi, base, idx
+|  lwz lo, 4(base)
+|.endmacro
+|.endif
 |
 |// Instruction decode.
 |.macro decode_OP4, dst, ins; rlwinm dst, ins, 2, 22, 29; .endmacro
@@ -412,6 +503,7 @@
 |// Call decode and dispatch.
 |.macro ins_callt
 |  // BASE = new base, RB = LFUNC/CFUNC, RC = nargs*8, FRAME_PC(BASE) = PC
+|  addi BASEP4, BASE, 4
 |  lwz PC, LFUNC:RB->pc
 |  lwz INS, 0(PC)
 |   addi PC, PC, 4
@@ -504,7 +596,12 @@ static void build_subroutines(BuildCtx *ctx)
   |  lwz PC, FRAME_PC(TMP2)		// Fetch PC of previous frame.
   |  mr BASE, TMP2			// Restore caller base.
   |  // Prepending may overwrite the pcall frame, so do it at the end.
-  |   stwu TMP1, FRAME_PC(RA)		// Prepend true to results.
+  |  .if ENDIAN_LE
+  |    addi RA, RA, -8
+  |    stw TMP1, WORD_HI(RA)		// Prepend true to results.
+  |  .else
+  |    stwu TMP1, -8(RA)		// Prepend true to results.
+  |  .endif
   |
   |->vm_returnc:
   |  addi RD, RD, 8			// RD = (nresults+1)*8.
@@ -560,7 +657,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  lwz TMP1, L->maxstack
   |  cmplw BASE, TMP1
   |  bge >8
-  |  stw TISNIL, 0(BASE)
+  |  stw TISNIL, WORD_HI(BASE)
   |  addi RD, RD, 8
   |  addi BASE, BASE, 8
   |  b <2
@@ -611,7 +708,12 @@ static void build_subroutines(BuildCtx *ctx)
   |->vm_unwind_ff_eh:			// Landing pad for external unwinder.
   |  lwz L, SAVE_L
   |  .toc ld TOCREG, SAVE_TOC
+  |.if P64
+  |     lus TISNUM, LJ_TISNUM >> 16	// Setup type comparison constants.
+  |     ori TISNUM, TISNUM, LJ_TISNUM & 0xffff
+  |.else
   |     li TISNUM, LJ_TISNUM		// Setup type comparison constants.
+  |.endif
   |  lp BASE, L->base
   |     lus TMP3, 0x59c0		// TOBIT = 2^52 + 2^51 (float).
   |   lwz DISPATCH, L->glref		// Setup pointer to dispatch table.
@@ -626,7 +728,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  la RA, -8(BASE)			// Results start at BASE-8.
   |     stw TMP3, TMPD
   |   addi DISPATCH, DISPATCH, GG_G2DISP
-  |  stw TMP1, 0(RA)			// Prepend false to error message.
+  |  stw TMP1, WORD_HI(RA)		// Prepend false to error message.
   |  li RD, 16				// 2 results: false + error message.
   |    st_vmstate
   |     lfs TONUM, TMPD
@@ -687,7 +789,12 @@ static void build_subroutines(BuildCtx *ctx)
   |  stw L, DISPATCH_GL(cur_L)(DISPATCH)
   |  mr RA, BASE
   |   lp BASE, L->base
+  |.if P64
+  |     lus TISNUM, LJ_TISNUM >> 16	// Setup type comparison constants.
+  |     ori TISNUM, TISNUM, LJ_TISNUM & 0xffff
+  |.else
   |     li TISNUM, LJ_TISNUM		// Setup type comparison constants.
+  |.endif
   |   lp TMP1, L->top
   |  lwz PC, FRAME_PC(BASE)
   |     lus TMP3, 0x59c0		// TOBIT = 2^52 + 2^51 (float).
@@ -737,7 +844,12 @@ static void build_subroutines(BuildCtx *ctx)
   |3:  // Entry point for vm_cpcall/vm_resume (BASE = base, PC = ftype).
   |  stw L, DISPATCH_GL(cur_L)(DISPATCH)
   |  lp TMP2, L->base			// TMP2 = old base (used in vmeta_call).
+  |.if P64
+  |     lus TISNUM, LJ_TISNUM >> 16	// Setup type comparison constants.
+  |     ori TISNUM, TISNUM, LJ_TISNUM & 0xffff
+  |.else
   |     li TISNUM, LJ_TISNUM		// Setup type comparison constants.
+  |.endif
   |   lp TMP1, L->top
   |     lus TMP3, 0x59c0		// TOBIT = 2^52 + 2^51 (float).
   |  add PC, PC, BASE
@@ -757,8 +869,8 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |->vm_call_dispatch:
   |  // TMP2 = old base, BASE = new base, RC = nargs*8, PC = caller PC
-  |  lwz TMP0, FRAME_PC(BASE)
-  |   lwz LFUNC:RB, FRAME_FUNC(BASE)
+  |  lwz TMP0, WORD_HI-8(BASE)
+  |   lwz LFUNC:RB, WORD_LO-8(BASE)
   |  checkfunc TMP0; bne ->vmeta_call
   |
   |->vm_call_dispatch_f:
@@ -777,7 +889,9 @@ static void build_subroutines(BuildCtx *ctx)
   |   sub TMP0, TMP0, TMP1		// Compute -savestack(L, L->top).
   |    lp TMP1, L->cframe
   |     addi DISPATCH, DISPATCH, GG_G2DISP
-  |  .toc lp CARG4, 0(CARG4)
+  |  .opd lp TOCREG, TOC_OFS(CARG4)
+  |  .opdenv lp ENVREG, ENV_OFS(CARG4)
+  |  .opd lp CARG4, 0(CARG4)
   |  li TMP2, 0
   |   stw TMP0, SAVE_NRES		// Neg. delta means cframe w/o frame.
   |  stw TMP2, SAVE_ERRF		// No error function.
@@ -785,7 +899,9 @@ static void build_subroutines(BuildCtx *ctx)
   |    stp sp, L->cframe		// Add our C frame to cframe chain.
   |     stw L, DISPATCH_GL(cur_L)(DISPATCH)
   |  mtctr CARG4
+  |  .elfv2 mr FUNCREG, CARG4
   |  bctrl			// (lua_State *L, lua_CFunction func, void *ud)
+  |  .toc lp TOCREG, SAVE_TOC
   |.if PPE
   |  mr BASE, CRET1
   |  cmpwi CRET1, 0
@@ -807,20 +923,27 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |->cont_dispatch:
   |  // BASE = meta base, RA = resultptr, RD = (nresults+1)*8
-  |  lwz TMP0, -12(BASE)		// Continuation.
+  |  lwz TMP0, FRAME_CONTRET(BASE)	// Continuation.
   |   mr RB, BASE
   |   mr BASE, TMP2			// Restore caller BASE.
   |    lwz LFUNC:TMP1, FRAME_FUNC(TMP2)
   |.if FFI
   |  cmplwi TMP0, 1
   |.endif
-  |     lwz PC, -16(RB)			// Restore PC from [cont|PC].
-  |   subi TMP2, RD, 8
+  |     lwz PC, FRAME_CONTPC(RB)	// Restore PC from [cont|PC].
+  |  addi BASEP4, BASE, 4
+  |   addi TMP2, RD, WORD_HI-8
   |    lwz TMP1, LFUNC:TMP1->pc
   |   stwx TISNIL, RA, TMP2		// Ensure one valid arg.
+  |.if P64
+  |   ld TMP3, 0(DISPATCH)
+  |.endif
   |.if FFI
   |  ble >1
   |.endif
+  |.if P64
+  |  add TMP0, TMP0, TMP3
+  |.endif
   |    lwz KBASE, PC2PROTO(k)(TMP1)
   |  // BASE = base, RA = resultptr, RB = meta base
   |  mtctr TMP0
@@ -856,20 +979,20 @@ static void build_subroutines(BuildCtx *ctx)
   |  la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
   |  li TMP0, LJ_TSTR
   |   decode_RB8 RB, INS
-  |  stw STR:RC, 4(CARG3)
+  |  stw STR:RC, WORD_LO(CARG3)
   |   add CARG2, BASE, RB
-  |  stw TMP0, 0(CARG3)
+  |  stw TMP0, WORD_HI(CARG3)
   |  b >1
   |
   |->vmeta_tgets:
   |  la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
   |  li TMP0, LJ_TTAB
-  |  stw TAB:RB, 4(CARG2)
+  |  stw TAB:RB, WORD_LO(CARG2)
   |   la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
-  |  stw TMP0, 0(CARG2)
+  |  stw TMP0, WORD_HI(CARG2)
   |   li TMP1, LJ_TSTR
-  |   stw STR:RC, 4(CARG3)
-  |   stw TMP1, 0(CARG3)
+  |   stw STR:RC, WORD_LO(CARG3)
+  |   stw TMP1, WORD_HI(CARG3)
   |  b >1
   |
   |->vmeta_tgetb:			// TMP0 = index
@@ -880,8 +1003,8 @@ static void build_subroutines(BuildCtx *ctx)
   |  la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
   |   add CARG2, BASE, RB
   |.if DUALNUM
-  |  stw TISNUM, 0(CARG3)
-  |  stw TMP0, 4(CARG3)
+  |  stw TISNUM, WORD_HI(CARG3)
+  |  stw TMP0, WORD_LO(CARG3)
   |.else
   |  stfd f0, 0(CARG3)
   |.endif
@@ -909,7 +1032,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  // BASE = base, L->top = new base, stack = cont/func/t/k
   |  subfic TMP1, BASE, FRAME_CONT
   |  lp BASE, L->top
-  |  stw PC, -16(BASE)			// [cont|PC]
+  |  stw PC, FRAME_CONTPC(BASE)		// [cont|PC]
   |   add PC, TMP1, BASE
   |  lwz LFUNC:RB, FRAME_FUNC(BASE)	// Guaranteed to be a function here.
   |   li NARGS8:RC, 16			// 2 args for func(t, k).
@@ -923,7 +1046,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  lfd f14, 0(CRET1)
   |  b ->BC_TGETR_Z
   |1:
-  |  stwx TISNIL, BASE, RA
+  |  stwx TISNIL, BASE_HI, RA
   |  b ->cont_nop
   |
   |//-----------------------------------------------------------------------
@@ -932,20 +1055,20 @@ static void build_subroutines(BuildCtx *ctx)
   |  la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
   |  li TMP0, LJ_TSTR
   |   decode_RB8 RB, INS
-  |  stw STR:RC, 4(CARG3)
+  |  stw STR:RC, WORD_LO(CARG3)
   |   add CARG2, BASE, RB
-  |  stw TMP0, 0(CARG3)
+  |  stw TMP0, WORD_HI(CARG3)
   |  b >1
   |
   |->vmeta_tsets:
   |  la CARG2, DISPATCH_GL(tmptv)(DISPATCH)
   |  li TMP0, LJ_TTAB
-  |  stw TAB:RB, 4(CARG2)
+  |  stw TAB:RB, WORD_LO(CARG2)
   |   la CARG3, DISPATCH_GL(tmptv2)(DISPATCH)
-  |  stw TMP0, 0(CARG2)
+  |  stw TMP0, WORD_HI(CARG2)
   |   li TMP1, LJ_TSTR
-  |   stw STR:RC, 4(CARG3)
-  |   stw TMP1, 0(CARG3)
+  |   stw STR:RC, WORD_LO(CARG3)
+  |   stw TMP1, WORD_HI(CARG3)
   |  b >1
   |
   |->vmeta_tsetb:			// TMP0 = index
@@ -956,8 +1079,8 @@ static void build_subroutines(BuildCtx *ctx)
   |  la CARG3, DISPATCH_GL(tmptv)(DISPATCH)
   |   add CARG2, BASE, RB
   |.if DUALNUM
-  |  stw TISNUM, 0(CARG3)
-  |  stw TMP0, 4(CARG3)
+  |  stw TISNUM, WORD_HI(CARG3)
+  |  stw TMP0, WORD_LO(CARG3)
   |.else
   |  stfd f0, 0(CARG3)
   |.endif
@@ -986,7 +1109,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  // BASE = base, L->top = new base, stack = cont/func/t/k/(v)
   |  subfic TMP1, BASE, FRAME_CONT
   |  lp BASE, L->top
-  |  stw PC, -16(BASE)			// [cont|PC]
+  |  stw PC, FRAME_CONTPC(BASE)		// [cont|PC]
   |   add PC, TMP1, BASE
   |  lwz LFUNC:RB, FRAME_FUNC(BASE)	// Guaranteed to be a function here.
   |   li NARGS8:RC, 24			// 3 args for func(t, k, v)
@@ -1006,17 +1129,9 @@ static void build_subroutines(BuildCtx *ctx)
   |->vmeta_comp:
   |  mr CARG1, L
   |   subi PC, PC, 4
-  |.if DUALNUM
-  |  mr CARG2, RA
-  |.else
   |  add CARG2, BASE, RA
-  |.endif
   |   stw PC, SAVE_PC
-  |.if DUALNUM
-  |  mr CARG3, RD
-  |.else
   |  add CARG3, BASE, RD
-  |.endif
   |   stp BASE, L->base
   |  decode_OP1 CARG4, INS
   |  bl extern lj_meta_comp  // (lua_State *L, TValue *o1, *o2, int op)
@@ -1043,7 +1158,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  b ->cont_nop
   |
   |->cont_condt:			// RA = resultptr
-  |  lwz TMP0, 0(RA)
+  |  lwz TMP0, WORD_HI(RA)
   |  .gpr64 extsw TMP0, TMP0
   |  subfic TMP0, TMP0, LJ_TTRUE	// Branch if result is true.
   |  subfe CRET1, CRET1, CRET1
@@ -1051,7 +1166,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  b <4
   |
   |->cont_condf:			// RA = resultptr
-  |  lwz TMP0, 0(RA)
+  |  lwz TMP0, WORD_HI(RA)
   |  .gpr64 extsw TMP0, TMP0
   |  subfic TMP0, TMP0, LJ_TTRUE	// Branch if result is false.
   |  subfe CRET1, CRET1, CRET1
@@ -1103,8 +1218,8 @@ static void build_subroutines(BuildCtx *ctx)
   |.endif
   |
   |->vmeta_unm:
-  |  mr CARG3, RD
-  |  mr CARG4, RD
+  |  add CARG3, BASE, RD
+  |  add CARG4, BASE, RD
   |  b >1
   |
   |->vmeta_arith_vn:
@@ -1139,7 +1254,7 @@ static void build_subroutines(BuildCtx *ctx)
   |->vmeta_binop:
   |  // BASE = old base, CRET1 = new base, stack = cont/func/o1/o2
   |  sub TMP1, CRET1, BASE
-  |   stw PC, -16(CRET1)		// [cont|PC]
+  |   stw PC, FRAME_CONTPC(CRET1)	// [cont|PC]
   |   mr TMP2, BASE
   |  addi PC, TMP1, FRAME_CONT
   |   mr BASE, CRET1
@@ -1150,7 +1265,7 @@ static void build_subroutines(BuildCtx *ctx)
 #if LJ_52
   |  mr SAVE0, CARG1
 #endif
-  |  mr CARG2, RD
+  |  add CARG2, BASE, RD
   |   stp BASE, L->base
   |  mr CARG1, L
   |   stw PC, SAVE_PC
@@ -1227,25 +1342,25 @@ static void build_subroutines(BuildCtx *ctx)
   |.macro .ffunc_1, name
   |->ff_ .. name:
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
-  |    lwz CARG1, 4(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
+  |    lwz CARG1, WORD_LO(BASE)
   |  blt ->fff_fallback
   |.endmacro
   |
   |.macro .ffunc_2, name
   |->ff_ .. name:
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG3, 0(BASE)
-  |    lwz CARG4, 8(BASE)
-  |   lwz CARG1, 4(BASE)
-  |    lwz CARG2, 12(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
+  |    lwz CARG4, WORD_HI+8(BASE)
+  |   lwz CARG1, WORD_LO(BASE)
+  |    lwz CARG2, WORD_LO+8(BASE)
   |  blt ->fff_fallback
   |.endmacro
   |
   |.macro .ffunc_n, name
   |->ff_ .. name:
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
   |    lfd FARG1, 0(BASE)
   |  blt ->fff_fallback
   |  checknum CARG3; bge ->fff_fallback
@@ -1254,9 +1369,9 @@ static void build_subroutines(BuildCtx *ctx)
   |.macro .ffunc_nn, name
   |->ff_ .. name:
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG3, 0(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
   |    lfd FARG1, 0(BASE)
-  |   lwz CARG4, 8(BASE)
+  |   lwz CARG4, WORD_HI+8(BASE)
   |    lfd FARG2, 8(BASE)
   |  blt ->fff_fallback
   |  checknum CARG3; bge ->fff_fallback
@@ -1279,9 +1394,9 @@ static void build_subroutines(BuildCtx *ctx)
   |  cmplw cr1, CARG3, TMP1
   |    lwz PC, FRAME_PC(BASE)
   |  bge cr1, ->fff_fallback
-  |   stw CARG3, 0(RA)
+  |   stw CARG3, WORD_HI(RA)
   |  addi RD, NARGS8:RC, 8		// Compute (nresults+1)*8.
-  |   stw CARG1, 4(RA)
+  |   stw CARG1, WORD_LO(RA)
   |  beq ->fff_res			// Done if exactly 1 argument.
   |  li TMP1, 8
   |  subi RC, RC, 8
@@ -1295,17 +1410,36 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc type
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG1, 0(BASE)
+  |   lwz CARG1, WORD_HI(BASE)
   |  blt ->fff_fallback
   |  .gpr64 extsw CARG1, CARG1
+  |.if P64
+  |  li TMP0, LJ_TNUMX
+  |    srawi TMP3, CARG1, 15
+  |  subfc TMP1, TMP0, CARG1
+  |.else
   |  subfc TMP0, TISNUM, CARG1
-  |  subfe TMP2, CARG1, CARG1
+  |.endif
+  |    subfe TMP2, CARG1, CARG1
+  |.if P64
+  |  cmpwi TMP3, -2
+  |    orc TMP1, TMP2, TMP1
+  |    subf TMP1, TMP0, TMP1
+  |  beq >1
+  |.else
   |  orc TMP1, TMP2, TMP0
-  |  addi TMP1, TMP1, ~LJ_TISNUM+1
+  |  subf TMP1, TISNUM, TMP1
+  |.endif
   |  slwi TMP1, TMP1, 3
+  |2:
   |   la TMP2, CFUNC:RB->upvalue
   |  lfdx FARG1, TMP2, TMP1
   |  b ->fff_resn
+  |.if P64
+  |1:
+  |  li TMP1, ~LJ_TLIGHTUD<<3
+  |  b <2
+  |.endif
   |
   |//-- Base library: getters and setters ---------------------------------
   |
@@ -1328,10 +1462,10 @@ static void build_subroutines(BuildCtx *ctx)
   |  sub TMP1, TMP0, TMP1
   |  add NODE:TMP2, NODE:TMP2, TMP1	// node = tab->node + (idx*32-idx*8)
   |3:  // Rearranged logic, because we expect _not_ to find the key.
-  |  lwz CARG4, NODE:TMP2->key
-  |   lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
-  |    lwz CARG2, NODE:TMP2->val
-  |     lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
+  |  lwz CARG4, WORD_HI+offsetof(Node, key)(NODE:TMP2)
+  |   lwz TMP0, WORD_LO+offsetof(Node, key)(NODE:TMP2)
+  |    lwz CARG2, WORD_HI+offsetof(Node, val)(NODE:TMP2)
+  |     lwz TMP1, WORD_LO+offsetof(Node, val)(NODE:TMP2)
   |  checkstr CARG4; bne >4
   |   cmpw TMP0, STR:RC; beq >5
   |4:
@@ -1349,14 +1483,33 @@ static void build_subroutines(BuildCtx *ctx)
   |6:
   |  cmpwi CARG3, LJ_TUDATA; beq <1
   |  .gpr64 extsw CARG3, CARG3
+  |.if P64
+  |  li TMP0, LJ_TNUMX
+  |    srawi TMP3, CARG3, 15
+  |  subfc TMP1, TMP0, CARG3
+  |.else
   |  subfc TMP0, TISNUM, CARG3
+  |.endif
   |  subfe TMP2, CARG3, CARG3
+  |.if P64
+  |  cmpwi TMP3, -2
+  |    orc TMP1, TMP2, TMP1
+  |    subf TMP1, TMP0, TMP1
+  |  beq >7
+  |.else
   |  orc TMP1, TMP2, TMP0
-  |  addi TMP1, TMP1, ~LJ_TISNUM+1
+  |  subf TMP1, TISNUM, TMP1
+  |.endif
   |  slwi TMP1, TMP1, 2
+  |8:
   |   la TMP2, DISPATCH_GL(gcroot[GCROOT_BASEMT])(DISPATCH)
   |  lwzx TAB:CARG1, TMP2, TMP1
   |  b <2
+  |.if P64
+  |7:
+  |  li TMP1, ~LJ_TLIGHTUD<<2
+  |  b <8
+  |.endif
   |
   |.ffunc_2 setmetatable
   |  // Fast path: no mt for table yet and not clearing the mt.
@@ -1374,8 +1527,8 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc rawget
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG4, 0(BASE)
-  |    lwz TAB:CARG2, 4(BASE)
+  |   lwz CARG4, WORD_HI(BASE)
+  |    lwz TAB:CARG2, WORD_LO(BASE)
   |  blt ->fff_fallback
   |  checktab CARG4; bne ->fff_fallback
   |   la CARG3, 8(BASE)
@@ -1390,7 +1543,7 @@ static void build_subroutines(BuildCtx *ctx)
   |.ffunc tonumber
   |  // Only handles the number case inline (without a base argument).
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG1, 0(BASE)
+  |   lwz CARG1, WORD_HI(BASE)
   |    lfd FARG1, 0(BASE)
   |  bne ->fff_fallback			// Exactly one argument.
   |   checknum CARG1; bgt ->fff_fallback
@@ -1425,10 +1578,15 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc next
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG1, 0(BASE)
-  |    lwz TAB:CARG2, 4(BASE)
+  |   lwz CARG1, WORD_HI(BASE)
+  |    lwz TAB:CARG2, WORD_LO(BASE)
   |  blt ->fff_fallback
+  |.if ENDIAN_LE
+  |   add TMP1, BASE, NARGS8:RC
+  |   stw TISNIL, WORD_HI(TMP1)		// Set missing 2nd arg to nil.
+  |.else
   |   stwx TISNIL, BASE, NARGS8:RC	// Set missing 2nd arg to nil.
+  |.endif
   |  checktab CARG1
   |   lwz PC, FRAME_PC(BASE)
   |  bne ->fff_fallback
@@ -1464,18 +1622,18 @@ static void build_subroutines(BuildCtx *ctx)
   |  lfd f0, CFUNC:RB->upvalue[0]
   |  la RA, -8(BASE)
 #endif
-  |   stw TISNIL, 8(BASE)
+  |   stw TISNIL, 8+WORD_HI(BASE)
   |  li RD, (3+1)*8
   |  stfd f0, 0(RA)
   |  b ->fff_res
   |
   |.ffunc ipairs_aux
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG3, 0(BASE)
-  |    lwz TAB:CARG1, 4(BASE)
-  |   lwz CARG4, 8(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
+  |    lwz TAB:CARG1, WORD_LO(BASE)
+  |   lwz CARG4, 8+WORD_HI(BASE)
   |.if DUALNUM
-  |    lwz TMP2, 12(BASE)
+  |    lwz TMP2, 8+WORD_LO(BASE)
   |.else
   |    lfd FARG2, 8(BASE)
   |.endif
@@ -1504,16 +1662,16 @@ static void build_subroutines(BuildCtx *ctx)
   |   la RA, -8(BASE)
   |  cmplw TMP0, TMP2
   |.if DUALNUM
-  |  stw TISNUM, 0(RA)
+  |  stw TISNUM, WORD_HI(RA)
   |   slwi TMP3, TMP2, 3
-  |  stw TMP2, 4(RA)
+  |  stw TMP2, WORD_LO(RA)
   |.else
   |   slwi TMP3, TMP2, 3
   |  stfd FARG2, 0(RA)
   |.endif
   |  ble >2				// Not in array part?
-  |  lwzx TMP2, TMP1, TMP3
-  |  lfdx f0, TMP1, TMP3
+  |  lfdux f0, TMP1, TMP3
+  |  lwz TMP2, WORD_HI(TMP1)
   |1:
   |  checknil TMP2
   |   li RD, (0+1)*8
@@ -1532,7 +1690,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  cmplwi CRET1, 0
   |   li RD, (0+1)*8
   |  beq ->fff_res
-  |  lwz TMP2, 0(CRET1)
+  |  lwz TMP2, WORD_HI(CRET1)
   |  lfd f0, 0(CRET1)
   |  b <1
   |
@@ -1551,11 +1709,11 @@ static void build_subroutines(BuildCtx *ctx)
   |  la RA, -8(BASE)
 #endif
   |.if DUALNUM
-  |  stw TISNUM, 8(BASE)
+  |  stw TISNUM, 8+WORD_HI(BASE)
   |.else
-  |  stw ZERO, 8(BASE)
+  |  stw ZERO, 8+WORD_HI(BASE)
   |.endif
-  |   stw ZERO, 12(BASE)
+  |   stw ZERO, 8+WORD_LO(BASE)
   |  li RD, (3+1)*8
   |  stfd f0, 0(RA)
   |  b ->fff_res
@@ -1576,7 +1734,7 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc xpcall
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG4, 8(BASE)
+  |   lwz CARG4, 8+WORD_HI(BASE)
   |    lfd FARG2, 8(BASE)
   |    lfd FARG1, 0(BASE)
   |  blt ->fff_fallback
@@ -1673,7 +1831,7 @@ static void build_subroutines(BuildCtx *ctx)
   |.if resume
   |  li TMP1, LJ_TTRUE
   |   la RA, -8(BASE)
-  |  stw TMP1, -8(BASE)			// Prepend true to results.
+  |  stw TMP1, WORD_HI-8(BASE)		// Prepend true to results.
   |  addi RD, RD, 16
   |.else
   |  mr RA, BASE
@@ -1693,7 +1851,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  lfd f0, 0(TMP3)
   |   stp TMP3, L:SAVE0->top		// Remove error from coroutine stack.
   |    li RD, (2+1)*8
-  |   stw TMP1, -8(BASE)		// Prepend false to results.
+  |   stw TMP1, WORD_HI-8(BASE)		// Prepend false to results.
   |    la RA, -8(BASE)
   |  stfd f0, 0(BASE)			// Copy error message.
   |  b <7
@@ -1746,8 +1904,8 @@ static void build_subroutines(BuildCtx *ctx)
   |->fff_resi:
   |  lwz PC, FRAME_PC(BASE)
   |  la RA, -8(BASE)
-  |  stw TISNUM, -8(BASE)
-  |  stw CRET1, -4(BASE)
+  |  stw TISNUM, WORD_HI-8(BASE)
+  |  stw CRET1, WORD_LO-8(BASE)
   |  b ->fff_res1
   |1:
   |  lus CARG3, 0x41e0	// 2^31.
@@ -1762,9 +1920,9 @@ static void build_subroutines(BuildCtx *ctx)
   |->fff_restv:
   |  // CARG3/CARG1 = TValue result.
   |  lwz PC, FRAME_PC(BASE)
-  |   stw CARG3, -8(BASE)
+  |   stw CARG3, WORD_HI-8(BASE)
   |  la RA, -8(BASE)
-  |   stw CARG1, -4(BASE)
+  |   stw CARG1, WORD_LO-8(BASE)
   |->fff_res1:
   |  // RA = results, PC = return.
   |  li RD, (1+1)*8
@@ -1782,10 +1940,11 @@ static void build_subroutines(BuildCtx *ctx)
   |  ins_next1
   |  // Adjust BASE. KBASE is assumed to be set for the calling frame.
   |   sub BASE, RA, TMP0
+  |   addi BASEP4, BASE, 4
   |  ins_next2
   |
   |6:  // Fill up results with nil.
-  |  subi TMP1, RD, 8
+  |  addi TMP1, RD, WORD_HI-8
   |   addi RD, RD, 8
   |  stwx TISNIL, RA, TMP1
   |  b <5
@@ -1898,7 +2057,7 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc math_log
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
   |    lfd FARG1, 0(BASE)
   |  bne ->fff_fallback			// Need exactly 1 argument.
   |  checknum CARG3; bge ->fff_fallback
@@ -1923,13 +2082,13 @@ static void build_subroutines(BuildCtx *ctx)
   |.if DUALNUM
   |.ffunc math_ldexp
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG3, 0(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
   |    lfd FARG1, 0(BASE)
-  |   lwz CARG4, 8(BASE)
+  |   lwz CARG4, WORD_HI+8(BASE)
   |.if GPR64
-  |    lwz CARG2, 12(BASE)
+  |    lwz CARG2, WORD_LO+8(BASE)
   |.else
-  |    lwz CARG1, 12(BASE)
+  |    lwz CARG1, WORD_LO+8(BASE)
   |.endif
   |  blt ->fff_fallback
   |  checknum CARG3; bge ->fff_fallback
@@ -1961,8 +2120,8 @@ static void build_subroutines(BuildCtx *ctx)
   |  stfd FARG1, 0(RA)
   |  li RD, (2+1)*8
   |.if DUALNUM
-  |   stw TISNUM, 8(RA)
-  |   stw TMP1, 12(RA)
+  |   stw TISNUM, WORD_HI+8(RA)
+  |   stw TMP1, WORD_LO+8(RA)
   |.else
   |   stfd FARG2, 8(RA)
   |.endif
@@ -1989,9 +2148,9 @@ static void build_subroutines(BuildCtx *ctx)
   |   add TMP2, BASE, NARGS8:RC
   |  bne >4
   |1:  // Handle integers.
-  |  lwz CARG4, 0(TMP1)
+  |  lwz CARG4, WORD_HI(TMP1)
   |   cmplw cr1, TMP1, TMP2
-  |  lwz CARG2, 4(TMP1)
+  |  lwz CARG2, WORD_LO(TMP1)
   |   bge cr1, ->fff_resi
   |  checknum CARG4
   |   xoris TMP0, CARG1, 0x8000
@@ -2020,7 +2179,7 @@ static void build_subroutines(BuildCtx *ctx)
   |   lfd FARG1, 0(BASE)
   |  bge ->fff_fallback
   |5:  // Handle numbers.
-  |  lwz CARG4, 0(TMP1)
+  |  lwz CARG4, WORD_HI(TMP1)
   |   cmplw cr1, TMP1, TMP2
   |  lfd FARG2, 0(TMP1)
   |   bge cr1, ->fff_resn
@@ -2035,7 +2194,7 @@ static void build_subroutines(BuildCtx *ctx)
   |.endif
   |  b <5
   |7:  // Convert integer to number and continue above.
-  |   lwz CARG2, 4(TMP1)
+  |   lwz CARG2, WORD_LO(TMP1)
   |  bne ->fff_fallback
   |  tonum_i FARG2, CARG2
   |  b <6
@@ -2043,7 +2202,12 @@ static void build_subroutines(BuildCtx *ctx)
   |  .ffunc_n name
   |  li TMP1, 8
   |1:
+  |.if ENDIAN_LE
+  |   add CARG2, BASE, TMP1
+  |   lwz CARG2, WORD_HI(CARG2)
+  |.else
   |   lwzx CARG2, BASE, TMP1
+  |.endif
   |   lfdx FARG2, BASE, TMP1
   |  cmplw cr1, TMP1, NARGS8:RC
   |   checknum CARG2
@@ -2067,8 +2231,8 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |.ffunc string_byte			// Only handle the 1-arg case here.
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
-  |    lwz STR:CARG1, 4(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
+  |    lwz STR:CARG1, WORD_LO(BASE)
   |  bne ->fff_fallback			// Need exactly 1 argument.
   |   checkstr CARG3
   |   bne ->fff_fallback
@@ -2099,12 +2263,12 @@ static void build_subroutines(BuildCtx *ctx)
   |.ffunc string_char			// Only handle the 1-arg case here.
   |  ffgccheck
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
   |.if DUALNUM
-  |    lwz TMP0, 4(BASE)
+  |    lwz TMP0, WORD_LO(BASE)
   |  bne ->fff_fallback			// Exactly 1 argument.
   |  checknum CARG3; bne ->fff_fallback
-  |   la CARG2, 7(BASE)
+  |   la CARG2, WORD_BLO(BASE)
   |.else
   |    lfd FARG1, 0(BASE)
   |  bne ->fff_fallback			// Exactly 1 argument.
@@ -2128,16 +2292,16 @@ static void build_subroutines(BuildCtx *ctx)
   |.ffunc string_sub
   |  ffgccheck
   |  cmplwi NARGS8:RC, 16
-  |   lwz CARG3, 16(BASE)
+  |   lwz CARG3, WORD_HI+16(BASE)
   |.if not DUALNUM
   |    lfd f0, 16(BASE)
   |.endif
-  |   lwz TMP0, 0(BASE)
-  |    lwz STR:CARG1, 4(BASE)
+  |   lwz TMP0, WORD_HI(BASE)
+  |    lwz STR:CARG1, WORD_LO(BASE)
   |  blt ->fff_fallback
-  |   lwz CARG2, 8(BASE)
+  |   lwz CARG2, WORD_HI+8(BASE)
   |.if DUALNUM
-  |    lwz TMP1, 12(BASE)
+  |    lwz TMP1, WORD_LO+8(BASE)
   |.else
   |    lfd f1, 8(BASE)
   |.endif
@@ -2145,7 +2309,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  beq >1
   |.if DUALNUM
   |  checknum CARG3
-  |   lwz TMP2, 20(BASE)
+  |   lwz TMP2, WORD_LO+16(BASE)
   |  bne ->fff_fallback
   |1:
   |  checknum CARG2; bne ->fff_fallback
@@ -2201,8 +2365,8 @@ static void build_subroutines(BuildCtx *ctx)
   |  .ffunc string_ .. name
   |  ffgccheck
   |  cmplwi NARGS8:RC, 8
-  |   lwz CARG3, 0(BASE)
-  |    lwz STR:CARG2, 4(BASE)
+  |   lwz CARG3, WORD_HI(BASE)
+  |    lwz STR:CARG2, WORD_LO(BASE)
   |  blt ->fff_fallback
   |  checkstr CARG3
   |   la SBUF:CARG1, DISPATCH_GL(tmpbuf)(DISPATCH)
@@ -2240,10 +2404,10 @@ static void build_subroutines(BuildCtx *ctx)
   |  addi TMP1, BASE, 8
   |  add TMP2, BASE, NARGS8:RC
   |1:
-  |  lwz CARG4, 0(TMP1)
+  |  lwz CARG4, WORD_HI(TMP1)
   |   cmplw cr1, TMP1, TMP2
   |.if DUALNUM
-  |  lwz CARG2, 4(TMP1)
+  |  lwz CARG2, WORD_LO(TMP1)
   |.else
   |  lfd FARG1, 0(TMP1)
   |.endif
@@ -2344,20 +2508,23 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |->fff_fallback:			// Call fast function fallback handler.
   |  // BASE = new base, RB = CFUNC, RC = nargs*8
-  |  lp TMP3, CFUNC:RB->f
+  |  lp FUNCREG, CFUNC:RB->f
   |    add TMP1, BASE, NARGS8:RC
   |   lwz PC, FRAME_PC(BASE)		// Fallback may overwrite PC.
   |    addi TMP0, TMP1, 8*LUA_MINSTACK
   |     lwz TMP2, L->maxstack
   |   stw PC, SAVE_PC			// Redundant (but a defined value).
-  |  .toc lp TMP3, 0(TMP3)
+  |  .opd lp TOCREG, TOC_OFS(FUNCREG)
+  |  .opdenv lp ENVREG, ENV_OFS(FUNCREG)
+  |  .opd lp FUNCREG, 0(FUNCREG)
   |  cmplw TMP0, TMP2
   |     stp BASE, L->base
   |    stp TMP1, L->top
   |   mr CARG1, L
   |  bgt >5				// Need to grow stack.
-  |  mtctr TMP3
+  |  mtctr FUNCREG
   |  bctrl				// (lua_State *L)
+  |  .toc lp TOCREG, SAVE_TOC
   |  // Either throws an error, or recovers and returns -1, 0 or nresults+1.
   |  lp BASE, L->base
   |  cmpwi CRET1, 0
@@ -2459,6 +2626,7 @@ static void build_subroutines(BuildCtx *ctx)
   |3:
   |  lp BASE, L->base
   |4:  // Re-dispatch to static ins.
+  |  addi BASEP4, BASE, 4
   |  lwz INS, -4(PC)
   |  decode_OPP TMP1, INS
   |   decode_RB8 RB, INS
@@ -2472,7 +2640,7 @@ static void build_subroutines(BuildCtx *ctx)
   |
   |->cont_hook:				// Continue from hook yield.
   |  addi PC, PC, 4
-  |  lwz MULTRES, -20(RB)		// Restore MULTRES for *M ins.
+  |  lwz MULTRES, WORD_LO-24(RB)		// Restore MULTRES for *M ins.
   |  b <4
   |
   |->vm_hotloop:			// Hot loop counter underflow.
@@ -2514,6 +2682,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  lp BASE, L->base
   |   lp TMP0, L->top
   |   stw ZERO, SAVE_PC			// Invalidate for subsequent line hook.
+  |  addi BASEP4, BASE, 4
   |  sub NARGS8:RC, TMP0, BASE
   |  add RA, BASE, RA
   |  lwz LFUNC:RB, FRAME_FUNC(BASE)
@@ -2525,7 +2694,7 @@ static void build_subroutines(BuildCtx *ctx)
   |.if JIT
   |  // RA = resultptr, RB = meta base
   |  lwz INS, -4(PC)
-  |    lwz TRACE:TMP2, -20(RB)		// Save previous trace.
+  |    lwz TRACE:TMP2, WORD_LO-24(RB)	// Save previous trace.
   |   addic. TMP1, MULTRES, -8
   |  decode_RA8 RC, INS			// Call base.
   |   beq >2
@@ -2560,10 +2729,16 @@ static void build_subroutines(BuildCtx *ctx)
   |  mr CARG2, PC
   |  bl extern lj_dispatch_stitch	// (jit_State *J, const BCIns *pc)
   |  lp BASE, L->base
+  |  addi BASEP4, BASE, 4
   |  b ->cont_nop
   |
   |9:
+  |.if ENDIAN_LE
+  |  addi BASEP4, BASE, 4
+  |  stwx TISNIL, BASEP4, RC
+  |.else
   |  stwx TISNIL, BASE, RC
+  |.endif
   |  addi RC, RC, 8
   |  b <3
   |.endif
@@ -2578,6 +2753,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  // HOOK_PROFILE is off again, so re-dispatch to dynamic instruction.
   |  lp BASE, L->base
   |  subi PC, PC, 4
+  |  addi BASEP4, BASE, 4
   |  b ->cont_nop
 #endif
   |
@@ -2586,39 +2762,72 @@ static void build_subroutines(BuildCtx *ctx)
   |//-----------------------------------------------------------------------
   |
   |.macro savex_, a, b, c, d
-  |  stfd f..a, 16+a*8(sp)
-  |  stfd f..b, 16+b*8(sp)
-  |  stfd f..c, 16+c*8(sp)
-  |  stfd f..d, 16+d*8(sp)
+  |  stfd f..a, EXIT_OFFSET+a*8(sp)
+  |  stfd f..b, EXIT_OFFSET+b*8(sp)
+  |  stfd f..c, EXIT_OFFSET+c*8(sp)
+  |  stfd f..d, EXIT_OFFSET+d*8(sp)
+  |.endmacro
+  |
+  |.macro saver, a
+  |  stp r..a, EXIT_OFFSET+32*8+a*PSIZE(sp)
   |.endmacro
   |
   |->vm_exit_handler:
   |.if JIT
-  |  addi sp, sp, -(16+32*8+32*4)
-  |  stmw r2, 16+32*8+2*4(sp)
+  |  addi sp, TMP0, sp, -(EXIT_OFFSET+32*8+32*PSIZE)
+  |  saver 3 // CARG1
+  |  saver 4 // CARG2
+  |  saver 5 // CARG3
+  |  saver 17 // DISPATCH
   |    addi DISPATCH, JGL, -GG_DISP2G-32768
   |    li CARG2, ~LJ_VMST_EXIT
-  |   lwz CARG1, 16+32*8+32*4(sp)	// Get stack chain.
+  |   lp CARG1, EXIT_OFFSET+32*8+32*PSIZE(sp)	// Get stack chain.
   |    stw CARG2, DISPATCH_GL(vmstate)(DISPATCH)
+  |  saver 2
+  |  saver 6
+  |  saver 7
+  |  saver 8
+  |  saver 9
+  |  saver 10
+  |  saver 11
+  |  saver 12
+  |  saver 13
   |  savex_ 0,1,2,3
-  |   stw CARG1, 0(sp)			// Store extended stack chain.
-  |   clrso TMP1
+  |   stp CARG1, 0(sp)			// Store extended stack chain.
+
   |  savex_ 4,5,6,7
-  |   addi CARG2, sp, 16+32*8+32*4	// Recompute original value of sp.
+  |  saver 14
+  |  saver 15
+  |  saver 16
+  |  saver 18
+  |   addi CARG2, sp, EXIT_OFFSET+32*8+32*PSIZE	// Recompute original value of sp.
   |  savex_ 8,9,10,11
-  |   stw CARG2, 16+32*8+1*4(sp)	// Store sp in RID_SP.
+  |   stp CARG2, EXIT_OFFSET+32*8+1*PSIZE(sp)	// Store sp in RID_SP.
   |  savex_ 12,13,14,15
   |   mflr CARG3
   |   li TMP1, 0
   |  savex_ 16,17,18,19
-  |   stw TMP1, 16+32*8+0*4(sp)		// Clear RID_TMP.
+  |   stw TMP1, EXIT_OFFSET+32*8+0*PSIZE(sp)		// Clear RID_TMP.
   |  savex_ 20,21,22,23
   |   lhz CARG4, 2(CARG3)		// Load trace number.
   |  savex_ 24,25,26,27
   |  lwz L, DISPATCH_GL(cur_L)(DISPATCH)
   |  savex_ 28,29,30,31
+  |  saver 19
+  |  saver 20
+  |  saver 21
+  |  saver 22
+  |  saver 23
+  |  saver 24
+  |  saver 25
+  |  saver 26
+  |  saver 27
+  |  saver 28
+  |  saver 29
+  |  saver 30
+  |  saver 31
   |   sub CARG3, TMP0, CARG3		// Compute exit number.
-  |  lp BASE, DISPATCH_GL(jit_base)(DISPATCH)
+  |  lwz BASE, DISPATCH_GL(jit_base)(DISPATCH)
   |   srwi CARG3, CARG3, 2
   |  stp L, DISPATCH_J(L)(DISPATCH)
   |   subi CARG3, CARG3, 2
@@ -2627,11 +2836,11 @@ static void build_subroutines(BuildCtx *ctx)
   |  stw TMP1, DISPATCH_GL(jit_base)(DISPATCH)
   |  addi CARG1, DISPATCH, GG_DISP2J
   |   stw CARG3, DISPATCH_J(exitno)(DISPATCH)
-  |  addi CARG2, sp, 16
+  |  addi CARG2, sp, EXIT_OFFSET
   |  bl extern lj_trace_exit		// (jit_State *J, ExitState *ex)
   |  // Returns MULTRES (unscaled) or negated error code.
   |  lp TMP1, L->cframe
-  |  lwz TMP2, 0(sp)
+  |  lp TMP2, 0(sp)
   |   lp BASE, L->base
   |.if GPR64
   |  rldicr sp, TMP1, 0, 61
@@ -2639,7 +2848,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  rlwinm sp, TMP1, 0, 0, 29
   |.endif
   |   lwz PC, SAVE_PC			// Get SAVE_PC.
-  |  stw TMP2, 0(sp)
+  |  stp TMP2, 0(sp)
   |  stw L, SAVE_L			// Set SAVE_L (on-trace resume/yield).
   |  b >1
   |.endif
@@ -2660,7 +2869,12 @@ static void build_subroutines(BuildCtx *ctx)
   |    stw TMP2, DISPATCH_GL(jit_base)(DISPATCH)
   |  lwz KBASE, PC2PROTO(k)(TMP1)
   |  // Setup type comparison constants.
+  |.if P64
+  |  lus TISNUM, LJ_TISNUM >> 16
+  |  ori TISNUM, TISNUM, LJ_TISNUM & 0xffff
+  |.else
   |  li TISNUM, LJ_TISNUM
+  |.endif
   |  lus TMP3, 0x59c0			// TOBIT = 2^52 + 2^51 (float).
   |  stw TMP3, TMPD
   |  li ZERO, 0
@@ -2680,14 +2894,14 @@ static void build_subroutines(BuildCtx *ctx)
   |   decode_RA8 RA, INS
   |  lpx TMP0, DISPATCH, TMP1
   |  mtctr TMP0
-  |  cmplwi TMP1, BC_FUNCF*4		// Function header?
+  |  cmplwi TMP1, BC_FUNCF*PSIZE	// Function header?
   |  bge >2
   |   decode_RB8 RB, INS
   |   decode_RD8 RD, INS
   |   decode_RC8 RC, INS
   |  bctr
   |2:
-  |  cmplwi TMP1, (BC_FUNCC+2)*4	// Fast function?
+  |  cmplwi TMP1, (BC_FUNCC+2)*PSIZE	// Fast function?
   |  blt >3
   |  // Check frame below fast function.
   |  lwz TMP1, FRAME_PC(BASE)
@@ -2697,7 +2911,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  lwz TMP2, -4(TMP1)
   |  decode_RA8 TMP0, TMP2
   |  sub TMP1, BASE, TMP0
-  |  lwz LFUNC:TMP2, -12(TMP1)
+  |  lwz LFUNC:TMP2, WORD_LO-16(TMP1)
   |  lwz TMP1, LFUNC:TMP2->pc
   |  lwz KBASE, PC2PROTO(k)(TMP1)
   |3:
@@ -2718,6 +2932,8 @@ static void build_subroutines(BuildCtx *ctx)
   |// NYI: Use internal implementations of floor, ceil, trunc.
   |
   |->vm_modi:
+  |  li TMP1, 0
+  |  mtxer TMP1
   |  divwo. TMP0, CARG1, CARG2
   |  bso >1
   |.if GPR64
@@ -2736,7 +2952,8 @@ static void build_subroutines(BuildCtx *ctx)
   |  cmpwi CARG2, 0
   |   li CARG1, 0
   |  beqlr
-  |  clrso TMP0			// Clear SO for -2147483648 % -1 and return 0.
+  |  // Clear SO for -2147483648 % -1 and return 0.
+  |  crxor 4*cr0+so, 4*cr0+so, 4*cr0+so
   |  blr
   |
   |//-----------------------------------------------------------------------
@@ -2749,10 +2966,18 @@ static void build_subroutines(BuildCtx *ctx)
   |->vm_cachesync:
   |.if JIT or FFI
   |  // Compute start of first cache line and number of cache lines.
+  |  .if GPR64
+  |  rldicr CARG1, CARG1, 0, 58
+  |  .else
   |  rlwinm CARG1, CARG1, 0, 0, 26
+  |  .endif
   |  sub CARG2, CARG2, CARG1
   |  addi CARG2, CARG2, 31
+  |  .if GPR64
+  |  srdi. CARG2, CARG2, 5
+  |  .else
   |  rlwinm. CARG2, CARG2, 27, 5, 31
+  |  .endif
   |  beqlr
   |  mtctr CARG2
   |  mr CARG3, CARG1
@@ -2774,39 +2999,70 @@ static void build_subroutines(BuildCtx *ctx)
   |//-- FFI helper functions -----------------------------------------------
   |//-----------------------------------------------------------------------
   |
-  |// Handler for callback functions. Callback slot number in r11, g in r12.
+  |// Handler for callback functions.
+  |// 32-bit: Callback slot number in r12, g in r11.
+  |// 64-bit v1: Callback slot number in bits 47+ of r11, g in 0-46, TOC in r2.
+  |// 64-bit v2: Callback slot number in bits 2-11 of r12, g in r11,
+  |// vm_ffi_callback in r2.
   |->vm_ffi_callback:
   |.if FFI
   |.type CTSTATE, CTState, PC
+  |  .if OPD
+  |   rldicl r12, r11, 17, 47
+  |   rldicl r11, r11, 0, 17
+  |  .endif
+  |  .if ELFV2
+  |   rlwinm r12, r12, 30, 22, 31
+  |   addisl TOCREG, TOCREG, extern .TOC.-lj_vm_ffi_callback@ha
+  |   addil TOCREG, TOCREG, extern .TOC.-lj_vm_ffi_callback@l
+  |  .endif
   |  saveregs
-  |  lwz CTSTATE, GL:r12->ctype_state
-  |   addi DISPATCH, r12, GG_G2DISP
-  |  stw r11, CTSTATE->cb.slot
-  |  stw r3, CTSTATE->cb.gpr[0]
+  |  lwz CTSTATE, GL:r11->ctype_state
+  |   addi DISPATCH, r11, GG_G2DISP
+  |  stw r12, CTSTATE->cb.slot
+  |  stp r3, CTSTATE->cb.gpr[0]
   |   stfd f1, CTSTATE->cb.fpr[0]
-  |  stw r4, CTSTATE->cb.gpr[1]
+  |  stp r4, CTSTATE->cb.gpr[1]
   |   stfd f2, CTSTATE->cb.fpr[1]
-  |  stw r5, CTSTATE->cb.gpr[2]
+  |  stp r5, CTSTATE->cb.gpr[2]
   |   stfd f3, CTSTATE->cb.fpr[2]
-  |  stw r6, CTSTATE->cb.gpr[3]
+  |  stp r6, CTSTATE->cb.gpr[3]
   |   stfd f4, CTSTATE->cb.fpr[3]
-  |  stw r7, CTSTATE->cb.gpr[4]
+  |  stp r7, CTSTATE->cb.gpr[4]
   |   stfd f5, CTSTATE->cb.fpr[4]
-  |  stw r8, CTSTATE->cb.gpr[5]
+  |  stp r8, CTSTATE->cb.gpr[5]
   |   stfd f6, CTSTATE->cb.fpr[5]
-  |  stw r9, CTSTATE->cb.gpr[6]
+  |  stp r9, CTSTATE->cb.gpr[6]
   |   stfd f7, CTSTATE->cb.fpr[6]
-  |  stw r10, CTSTATE->cb.gpr[7]
+  |  stp r10, CTSTATE->cb.gpr[7]
   |   stfd f8, CTSTATE->cb.fpr[7]
+  |  .if GPR64
+  |   stfd f9, CTSTATE->cb.fpr[8]
+  |   stfd f10, CTSTATE->cb.fpr[9]
+  |   stfd f11, CTSTATE->cb.fpr[10]
+  |   stfd f12, CTSTATE->cb.fpr[11]
+  |   stfd f13, CTSTATE->cb.fpr[12]
+  |  .endif
+  |  .if ELFV2
+  |  addi TMP0, sp, CFRAME_SPACE+96
+  |  .elif GPR64
+  |  addi TMP0, sp, CFRAME_SPACE+112
+  |  .else
   |  addi TMP0, sp, CFRAME_SPACE+8
-  |  stw TMP0, CTSTATE->cb.stack
+  |  .endif
+  |  stp TMP0, CTSTATE->cb.stack
   |   mr CARG1, CTSTATE
   |  stw CTSTATE, SAVE_PC		// Any value outside of bytecode is ok.
   |   mr CARG2, sp
   |  bl extern lj_ccallback_enter	// (CTState *cts, void *cf)
   |  // Returns lua_State *.
   |  lp BASE, L:CRET1->base
+  |.if P64
+  |     lus TISNUM, LJ_TISNUM >> 16	// Setup type comparison constants.
+  |     ori TISNUM, TISNUM, LJ_TISNUM & 0xffff
+  |.else
   |     li TISNUM, LJ_TISNUM		// Setup type comparison constants.
+  |.endif
   |  lp RC, L:CRET1->top
   |     lus TMP3, 0x59c0		// TOBIT = 2^52 + 2^51 (float).
   |     li ZERO, 0
@@ -2835,9 +3091,21 @@ static void build_subroutines(BuildCtx *ctx)
   |  mr CARG1, CTSTATE
   |  mr CARG2, RA
   |  bl extern lj_ccallback_leave	// (CTState *cts, TValue *o)
-  |  lwz CRET1, CTSTATE->cb.gpr[0]
+  |  lp CRET1, CTSTATE->cb.gpr[0]
   |  lfd FARG1, CTSTATE->cb.fpr[0]
-  |  lwz CRET2, CTSTATE->cb.gpr[1]
+  |  lp CRET2, CTSTATE->cb.gpr[1]
+  |  .if GPR64
+  |    lfd FARG2, CTSTATE->cb.fpr[1]
+  |  .else
+  |    lp CARG3, CTSTATE->cb.gpr[2]
+  |    lp CARG4, CTSTATE->cb.gpr[3]
+  |  .endif
+  |  .elfv2 lfd f3, CTSTATE->cb.fpr[2]
+  |  .elfv2 lfd f4, CTSTATE->cb.fpr[3]
+  |  .elfv2 lfd f5, CTSTATE->cb.fpr[4]
+  |  .elfv2 lfd f6, CTSTATE->cb.fpr[5]
+  |  .elfv2 lfd f7, CTSTATE->cb.fpr[6]
+  |  .elfv2 lfd f8, CTSTATE->cb.fpr[7]
   |  b ->vm_leave_unw
   |.endif
   |
@@ -2850,23 +3118,46 @@ static void build_subroutines(BuildCtx *ctx)
   |   lbz CARG2, CCSTATE->nsp
   |   lbz CARG3, CCSTATE->nfpr
   |  neg TMP1, TMP1
+  |  .if GPR64
+  |    std TMP0, 16(sp)
+  |  .else
   |    stw TMP0, 4(sp)
+  |  .endif
   |   cmpwi cr1, CARG3, 0
   |  mr TMP2, sp
   |   addic. CARG2, CARG2, -1
+  |  .if GPR64
+  |  stdux sp, sp, TMP1
+  |  .else
   |  stwux sp, sp, TMP1
+  |  .endif
   |   crnot 4*cr1+eq, 4*cr1+eq		// For vararg calls.
-  |  stw r14, -4(TMP2)
-  |  stw CCSTATE, -8(TMP2)
+  |  .if GPR64
+  |    std r14, -8(TMP2)
+  |    std CCSTATE, -16(TMP2)
+  |  .else
+  |    stw r14, -4(TMP2)
+  |    stw CCSTATE, -8(TMP2)
+  |  .endif
   |  mr r14, TMP2
   |  la TMP1, CCSTATE->stack
+  |  .if GPR64
+  |   sldi CARG2, CARG2, 3
+  |  .else
   |   slwi CARG2, CARG2, 2
+  |  .endif
   |   blty >2
-  |  la TMP2, 8(sp)
+  |  .if ELFV2
+  |    la TMP2, 96(sp)
+  |  .elif GPR64
+  |    la TMP2, 112(sp)
+  |  .else
+  |    la TMP2, 8(sp)
+  |  .endif
   |1:
-  |  lwzx TMP0, TMP1, CARG2
-  |  stwx TMP0, TMP2, CARG2
-  |   addic. CARG2, CARG2, -4
+  |  lpx TMP0, TMP1, CARG2
+  |  stpx TMP0, TMP2, CARG2
+  |   addic. CARG2, CARG2, -PSIZE
   |  bge <1
   |2:
   |  bney cr1, >3
@@ -2878,28 +3169,55 @@ static void build_subroutines(BuildCtx *ctx)
   |  lfd f6, CCSTATE->fpr[5]
   |  lfd f7, CCSTATE->fpr[6]
   |  lfd f8, CCSTATE->fpr[7]
+  |  .if GPR64
+  |  lfd f9, CCSTATE->fpr[8]
+  |  lfd f10, CCSTATE->fpr[9]
+  |  lfd f11, CCSTATE->fpr[10]
+  |  lfd f12, CCSTATE->fpr[11]
+  |  lfd f13, CCSTATE->fpr[12]
+  |  .endif
   |3:
-  |   lp TMP0, CCSTATE->func
-  |  lwz CARG2, CCSTATE->gpr[1]
-  |  lwz CARG3, CCSTATE->gpr[2]
-  |  lwz CARG4, CCSTATE->gpr[3]
-  |  lwz CARG5, CCSTATE->gpr[4]
-  |   mtctr TMP0
-  |  lwz r8, CCSTATE->gpr[5]
-  |  lwz r9, CCSTATE->gpr[6]
-  |  lwz r10, CCSTATE->gpr[7]
-  |  lwz CARG1, CCSTATE->gpr[0]		// Do this last, since CCSTATE is CARG1.
+  |  .toc std TOCREG, SAVE_TOC
+  |   lp FUNCREG, CCSTATE->func
+  |  lp CARG2, CCSTATE->gpr[1]
+  |  lp CARG3, CCSTATE->gpr[2]
+  |  .opd lp TOCREG, TOC_OFS(FUNCREG)
+  |  .opdenv lp ENVREG, ENV_OFS(FUNCREG)
+  |  .opd lp FUNCREG, 0(FUNCREG)
+  |  lp CARG4, CCSTATE->gpr[3]
+  |  lp CARG5, CCSTATE->gpr[4]
+  |   mtctr FUNCREG
+  |  lp r8, CCSTATE->gpr[5]
+  |  lp r9, CCSTATE->gpr[6]
+  |  lp r10, CCSTATE->gpr[7]
+  |  lp CARG1, CCSTATE->gpr[0]		// Do this last, since CCSTATE is CARG1.
   |   bctrl
-  |  lwz CCSTATE:TMP1, -8(r14)
-  |  lwz TMP2, -4(r14)
+  |   .toc lp TOCREG, SAVE_TOC
+  |  .if GPR64
+  |   ld CCSTATE:TMP1, -16(r14)
+  |   ld TMP2, -8(r14)
+  |   ld TMP0, 16(r14)
+  |  .else
+  |   lwz CCSTATE:TMP1, -8(r14)
+  |   lwz TMP2, -4(r14)
   |   lwz TMP0, 4(r14)
-  |  stw CARG1, CCSTATE:TMP1->gpr[0]
+  |  .endif
+  |  stp CARG1, CCSTATE:TMP1->gpr[0]
   |  stfd FARG1, CCSTATE:TMP1->fpr[0]
-  |  stw CARG2, CCSTATE:TMP1->gpr[1]
+  |  stp CARG2, CCSTATE:TMP1->gpr[1]
+  |  .if GPR64
+  |   stfd FARG2, CCSTATE:TMP1->fpr[1]
+  |  .endif
+  |  .elfv2 stfd FARG3, CCSTATE:TMP1->fpr[2]
+  |  .elfv2 stfd FARG4, CCSTATE:TMP1->fpr[3]
+  |  .elfv2 stfd FARG5, CCSTATE:TMP1->fpr[4]
+  |  .elfv2 stfd FARG6, CCSTATE:TMP1->fpr[5]
+  |  .elfv2 stfd FARG7, CCSTATE:TMP1->fpr[6]
+  |  .elfv2 stfd FARG8, CCSTATE:TMP1->fpr[7]
   |   mtlr TMP0
-  |  stw CARG3, CCSTATE:TMP1->gpr[2]
+  |  stp CARG3, CCSTATE:TMP1->gpr[2]
   |   mr sp, r14
-  |  stw CARG4, CCSTATE:TMP1->gpr[3]
+  |  stp CARG4, CCSTATE:TMP1->gpr[3]
   |   mr r14, TMP2
   |  blr
   |.endif
@@ -2923,13 +3241,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_ISLT: case BC_ISGE: case BC_ISLE: case BC_ISGT:
     |  // RA = src1*8, RD = src2*8, JMP with RD = target
     |.if DUALNUM
-    |  lwzux TMP0, RA, BASE
+    |  lwzx TMP0, BASE_HI, RA
     |    addi PC, PC, 4
-    |   lwz CARG2, 4(RA)
-    |  lwzux TMP1, RD, BASE
+    |   lwzx CARG2, BASE_LO, RA
+    |  lwzx TMP1, BASE_HI, RD
     |    lwz TMP2, -4(PC)
     |  checknum cr0, TMP0
-    |   lwz CARG3, 4(RD)
+    |   lwzx CARG3, BASE_LO, RD
     |    decode_RD4 TMP2, TMP2
     |  checknum cr1, TMP1
     |    addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
@@ -2953,7 +3271,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |7:  // RA is not an integer.
     |  bgt cr0, ->vmeta_comp
     |  // RA is a number.
-    |   lfd f0, 0(RA)
+    |   lfdx f0, BASE, RA
     |  bgt cr1, ->vmeta_comp
     |  blt cr1, >4
     |  // RA is a number, RD is an integer.
@@ -2965,7 +3283,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // RA is an integer, RD is a number.
     |  tonum_i f0, CARG2
     |4:
-    |  lfd f1, 0(RD)
+    |  lfdx f1, BASE, RD
     |5:
     |  fcmpu cr0, f0, f1
     if (op == BC_ISLT) {
@@ -2981,10 +3299,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     }
     |  b <1
     |.else
-    |  lwzx TMP0, BASE, RA
+    |  lwzx TMP0, BASE_HI, RA
     |    addi PC, PC, 4
     |   lfdx f0, BASE, RA
-    |  lwzx TMP1, BASE, RD
+    |  lwzx TMP1, BASE_HI, RD
     |  checknum cr0, TMP0
     |    lwz TMP2, -4(PC)
     |   lfdx f1, BASE, RD
@@ -3015,15 +3333,23 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     vk = op == BC_ISEQV;
     |  // RA = src1*8, RD = src2*8, JMP with RD = target
     |.if DUALNUM
-    |  lwzux TMP0, RA, BASE
+    |  lwzx TMP0, BASE_HI, RA
     |    addi PC, PC, 4
-    |   lwz CARG2, 4(RA)
-    |  lwzux TMP1, RD, BASE
+    |   lwzx CARG2, BASE_LO, RA
+    |  .if ENDIAN_LE
+    |    lwzx TMP1, BASE_HI, RD
+    |  .else
+    |    lwzux TMP1, RD, BASE_HI
+    |  .endif
     |  checknum cr0, TMP0
     |    lwz TMP2, -4(PC)
     |  checknum cr1, TMP1
     |    decode_RD4 TMP2, TMP2
-    |   lwz CARG3, 4(RD)
+    |  .if ENDIAN_LE
+    |   lwzux CARG3, RD, BASE_LO
+    |  .else
+    |   lwz CARG3, WORD_LO(RD)
+    |  .endif
     |  cror 4*cr7+gt, 4*cr0+gt, 4*cr1+gt
     |    addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
     if (vk) {
@@ -3032,14 +3358,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
       |  ble cr7, ->BC_ISNEN_Z
     }
     |.else
-    |  lwzux TMP0, RA, BASE
+    |  lwzx TMP0, BASE_HI, RA
     |   lwz TMP2, 0(PC)
-    |    lfd f0, 0(RA)
+    |    lfdx f0, BASE, RA
     |   addi PC, PC, 4
-    |  lwzux TMP1, RD, BASE
+    |  lwzx TMP1, BASE_HI, RD
     |  checknum cr0, TMP0
     |   decode_RD4 TMP2, TMP2
-    |    lfd f1, 0(RD)
+    |    lfdx f1, BASE, RD
     |  checknum cr1, TMP1
     |   addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
     |  bge cr0, >5
@@ -3057,8 +3383,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |.endif
     |5:  // Either or both types are not numbers.
     |.if not DUALNUM
-    |    lwz CARG2, 4(RA)
-    |    lwz CARG3, 4(RD)
+    |    lwzx CARG2, BASE_LO, RA
+    |    lwzx CARG3, BASE_LO, RD
     |.endif
     |.if FFI
     |  cmpwi cr7, TMP0, LJ_TCDATA
@@ -3074,10 +3400,16 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |.if FFI
     |  beq cr7, ->vmeta_equal_cd
     |.endif
+    |.if P64
+    |   cmplwi cr7, TMP3, ~LJ_TUDATA		// Avoid 64 bit lightuserdata.
+    |.endif
     |    cmplw cr5, CARG2, CARG3
     |  crandc 4*cr0+gt, 4*cr0+eq, 4*cr1+gt	// 2: Same type and primitive.
     |  crorc 4*cr0+lt, 4*cr5+eq, 4*cr0+eq	// 1: Same tv or different type.
     |  crand 4*cr0+eq, 4*cr0+eq, 4*cr5+eq	// 0: Same type and same tv.
+    |.if P64
+    |   cror 4*cr6+lt, 4*cr6+lt, 4*cr7+gt
+    |.endif
     |   mr SAVE0, PC
     |  cror 4*cr0+eq, 4*cr0+eq, 4*cr0+gt	// 0 or 2.
     |  cror 4*cr0+lt, 4*cr0+lt, 4*cr0+gt	// 1 or 2.
@@ -3116,9 +3448,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_ISEQS: case BC_ISNES:
     vk = op == BC_ISEQS;
     |  // RA = src*8, RD = str_const*8 (~), JMP with RD = target
-    |  lwzux TMP0, RA, BASE
+    |  lwzx TMP0, BASE_HI, RA
     |   srwi RD, RD, 1
-    |  lwz STR:TMP3, 4(RA)
+    |  lwzx STR:TMP3, BASE_LO, RA
     |    lwz TMP2, 0(PC)
     |   subfic RD, RD, -4
     |    addi PC, PC, 4
@@ -3150,15 +3482,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     vk = op == BC_ISEQN;
     |  // RA = src*8, RD = num_const*8, JMP with RD = target
     |.if DUALNUM
-    |  lwzux TMP0, RA, BASE
+    |  lwzx TMP0, BASE_HI, RA
     |    addi PC, PC, 4
-    |   lwz CARG2, 4(RA)
-    |  lwzux TMP1, RD, KBASE
+    |   lwzx CARG2, BASE_LO, RA
+    |  lwzux2 TMP1, CARG3, RD, KBASE
     |  checknum cr0, TMP0
     |    lwz TMP2, -4(PC)
     |  checknum cr1, TMP1
     |    decode_RD4 TMP2, TMP2
-    |   lwz CARG3, 4(RD)
     |    addis TMP2, TMP2, -(BCBIAS_J*4 >> 16)
     if (vk) {
       |->BC_ISEQN_Z:
@@ -3175,7 +3506,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     } else {
       |->BC_ISNEN_Z:  // Dummy label.
     }
-    |  lwzx TMP0, BASE, RA
+    |  lwzx TMP0, BASE_HI, RA
     |    addi PC, PC, 4
     |   lfdx f0, BASE, RA
     |    lwz TMP2, -4(PC)
@@ -3213,7 +3544,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |7:  // RA is not an integer.
     |  bge cr0, <3
     |  // RA is a number.
-    |   lfd f0, 0(RA)
+    |   lfdx f0, BASE, RA
     |  blt cr1, >1
     |  // RA is a number, RD is an integer.
     |  tonum_i f1, CARG3
@@ -3232,7 +3563,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_ISEQP: case BC_ISNEP:
     vk = op == BC_ISEQP;
     |  // RA = src*8, RD = primitive_type*8 (~), JMP with RD = target
-    |  lwzx TMP0, BASE, RA
+    |  lwzx TMP0, BASE_HI, RA
     |   srwi TMP1, RD, 3
     |    lwz TMP2, 0(PC)
     |   not TMP1, TMP1
@@ -3262,7 +3593,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
 
   case BC_ISTC: case BC_ISFC: case BC_IST: case BC_ISF:
     |  // RA = dst*8 or unused, RD = src*8, JMP with RD = target
-    |  lwzx TMP0, BASE, RD
+    |  lwzx TMP0, BASE_HI, RD
     |   lwz INS, 0(PC)
     |   addi PC, PC, 4
     if (op == BC_IST || op == BC_ISF) {
@@ -3297,7 +3628,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
 
   case BC_ISTYPE:
     |  // RA = src*8, RD = -type*8
-    |  lwzx TMP0, BASE, RA
+    |  lwzx TMP0, BASE_HI, RA
     |  srwi TMP1, RD, 3
     |  ins_next1
     |.if not PPE and not GPR64
@@ -3311,7 +3642,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_ISNUM:
     |  // RA = src*8, RD = -(TISNUM-1)*8
-    |  lwzx TMP0, BASE, RA
+    |  lwzx TMP0, BASE_HI, RA
     |  ins_next1
     |  checknum TMP0
     |  bge ->vmeta_istype
@@ -3330,17 +3661,20 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_NOT:
     |  // RA = dst*8, RD = src*8
     |  ins_next1
-    |  lwzx TMP0, BASE, RD
+    |  lwzx TMP0, BASE_HI, RD
     |  .gpr64 extsw TMP0, TMP0
     |  subfic TMP1, TMP0, LJ_TTRUE
     |  adde TMP0, TMP0, TMP1
-    |  stwx TMP0, BASE, RA
+    |  stwx TMP0, BASE_HI, RA
     |  ins_next2
     break;
   case BC_UNM:
     |  // RA = dst*8, RD = src*8
-    |  lwzux TMP1, RD, BASE
-    |   lwz TMP0, 4(RD)
+    |  lwzx TMP1, BASE_HI, RD
+    |   lwzx TMP0, BASE_LO, RD
+    |.if DUALNUM and not GPR64
+    |  mtxer ZERO
+    |.endif
     |  checknum TMP1
     |.if DUALNUM
     |  bne >5
@@ -3352,18 +3686,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |.else
     |  nego. TMP0, TMP0
     |  bso >4
-    |1:
     |.endif
     |  ins_next1
-    |  stwux TISNUM, RA, BASE
-    |   stw TMP0, 4(RA)
+    |  stwx TISNUM, BASE_HI, RA
+    |   stwx TMP0, BASE_LO, RA
     |3:
     |  ins_next2
     |4:
-    |.if not GPR64
-    |  // Potential overflow.
-    |  checkov TMP1, <1			// Ignore unrelated overflow.
-    |.endif
     |  lus TMP1, 0x41e0			// 2^31.
     |  li TMP0, 0
     |  b >7
@@ -3373,8 +3702,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  xoris TMP1, TMP1, 0x8000
     |7:
     |  ins_next1
-    |  stwux TMP1, RA, BASE
-    |   stw TMP0, 4(RA)
+    |  stwx TMP1, BASE_HI, RA
+    |   stwx TMP0, BASE_LO, RA
     |.if DUALNUM
     |  b <3
     |.else
@@ -3383,15 +3712,15 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_LEN:
     |  // RA = dst*8, RD = src*8
-    |  lwzux TMP0, RD, BASE
-    |   lwz CARG1, 4(RD)
+    |  lwzx TMP0, BASE_HI, RD
+    |   lwzx CARG1, BASE_LO, RD
     |  checkstr TMP0; bne >2
     |  lwz CRET1, STR:CARG1->len
     |1:
     |.if DUALNUM
     |  ins_next1
-    |  stwux TISNUM, RA, BASE
-    |   stw CRET1, 4(RA)
+    |  stwx TISNUM, BASE_HI, RA
+    |   stwx CRET1, BASE_LO, RA
     |.else
     |  tonum_u f0, CRET1		// Result is a non-negative integer.
     |  ins_next1
@@ -3426,9 +3755,16 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
     ||switch (vk) {
     ||case 0:
-    |   lwzx TMP1, BASE, RB
+    |   .if ENDIAN_LE and DUALNUM
+    |     addi TMP2, RC, 4
+    |   .endif
+    |   lwzx TMP1, BASE_HI, RB
     |   .if DUALNUM
-    |     lwzx TMP2, KBASE, RC
+    |     .if ENDIAN_LE
+    |       lwzx TMP2, KBASE, TMP2
+    |     .else
+    |       lwzx TMP2, KBASE, RC
+    |     .endif
     |   .endif
     |    lfdx f14, BASE, RB
     |    lfdx f15, KBASE, RC
@@ -3442,9 +3778,16 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   .endif
     ||  break;
     ||case 1:
-    |   lwzx TMP1, BASE, RB
+    |   .if ENDIAN_LE and DUALNUM
+    |     addi TMP2, RC, 4
+    |   .endif
+    |   lwzx TMP1, BASE_HI, RB
     |   .if DUALNUM
-    |     lwzx TMP2, KBASE, RC
+    |     .if ENDIAN_LE
+    |       lwzx TMP2, KBASE, TMP2
+    |     .else
+    |       lwzx TMP2, KBASE, RC
+    |     .endif
     |   .endif
     |    lfdx f15, BASE, RB
     |    lfdx f14, KBASE, RC
@@ -3458,8 +3801,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   .endif
     ||  break;
     ||default:
-    |   lwzx TMP1, BASE, RB
-    |   lwzx TMP2, BASE, RC
+    |   lwzx TMP1, BASE_HI, RB
+    |   lwzx TMP2, BASE_HI, RC
     |    lfdx f14, BASE, RB
     |    lfdx f15, BASE, RC
     |   checknum cr0, TMP1
@@ -3514,41 +3857,62 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     ||vk = ((int)op - BC_ADDVN) / (BC_ADDNV-BC_ADDVN);
     ||switch (vk) {
     ||case 0:
-    |   lwzux TMP1, RB, BASE
-    |   lwzux TMP2, RC, KBASE
-    |    lwz CARG1, 4(RB)
-    |   checknum cr0, TMP1
-    |    lwz CARG2, 4(RC)
+    |   .if ENDIAN_LE
+    |     lwzux CARG2, RC, KBASE
+    |     lwzx TMP1, RB, BASE_HI
+    |      lwz TMP2, 4(RC)
+    |     checknum cr0, TMP1
+    |      lwzux CARG1, RB, BASE
+    |   .else
+    |     lwzux TMP1, RB, BASE
+    |     lwzux TMP2, RC, KBASE
+    |      lwz CARG1, 4(RB)
+    |     checknum cr0, TMP1
+    |      lwz CARG2, 4(RC)
+    |   .endif
     ||  break;
     ||case 1:
-    |   lwzux TMP1, RB, BASE
-    |   lwzux TMP2, RC, KBASE
-    |    lwz CARG2, 4(RB)
-    |   checknum cr0, TMP1
-    |    lwz CARG1, 4(RC)
+    |   .if ENDIAN_LE
+    |     lwzux CARG1, RC, KBASE
+    |     lwzx TMP1, RB, BASE_HI
+    |      lwz TMP2, 4(RC)
+    |     checknum cr0, TMP1
+    |      lwzux CARG2, RB, BASE
+    |   .else
+    |     lwzux TMP1, RB, BASE
+    |     lwzux TMP2, RC, KBASE
+    |      lwz CARG2, 4(RB)
+    |     checknum cr0, TMP1
+    |      lwz CARG1, 4(RC)
+    |   .endif
     ||  break;
     ||default:
-    |   lwzux TMP1, RB, BASE
-    |   lwzux TMP2, RC, BASE
-    |    lwz CARG1, 4(RB)
-    |   checknum cr0, TMP1
-    |    lwz CARG2, 4(RC)
+    |   .if ENDIAN_LE
+    |     lwzx TMP1, RB, BASE_HI
+    |     lwzx TMP2, RC, BASE_HI
+    |      lwzux CARG1, RB, BASE
+    |     checknum cr0, TMP1
+    |      lwzux CARG2, RC, BASE
+    |   .else
+    |     lwzux TMP1, RB, BASE
+    |     lwzux TMP2, RC, BASE
+    |      lwz CARG1, 4(RB)
+    |     checknum cr0, TMP1
+    |      lwz CARG2, 4(RC)
+    |   .endif
     ||  break;
     ||}
+    |  mtxer ZERO
     |  checknum cr1, TMP2
     |  bne >5
     |  bne cr1, >5
     |  intins CARG1, CARG1, CARG2
-    |  bso >4
-    |1:
+    |  ins_arithfallback bso
     |  ins_next1
-    |  stwux TISNUM, RA, BASE
-    |  stw CARG1, 4(RA)
+    |  stwx TISNUM, BASE_HI, RA
+    |  stwx CARG1, BASE_LO, RA
     |2:
     |  ins_next2
-    |4:  // Overflow.
-    |  checkov TMP0, <1			// Ignore unrelated overflow.
-    |  ins_arithfallback b
     |5:  // FP variant.
     ||if (vk == 1) {
     |  lfd f15, 0(RB)
@@ -3620,9 +3984,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_POW:
     |  // NYI: (partial) integer arithmetic.
-    |  lwzx TMP1, BASE, RB
+    |  lwzx TMP1, BASE_HI, RB
     |   lfdx FARG1, BASE, RB
-    |  lwzx TMP2, BASE, RC
+    |  lwzx TMP2, BASE_HI, RC
     |   lfdx FARG2, BASE, RC
     |  checknum cr0, TMP1
     |  checknum cr1, TMP2
@@ -3648,6 +4012,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // Returns NULL (finished) or TValue * (metamethod).
     |  cmplwi CRET1, 0
     |   lp BASE, L->base
+    |   addi BASEP4, BASE, 4
     |  bne ->vmeta_binop
     |  ins_next1
     |  lfdx f0, BASE, SAVE0		// Copy result from RB to RA.
@@ -3664,8 +4029,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  ins_next1
     |  lwzx TMP0, KBASE, TMP1		// KBASE-4-str_const*4
     |  li TMP2, LJ_TSTR
-    |  stwux TMP2, RA, BASE
-    |  stw TMP0, 4(RA)
+    |  stwx TMP2, BASE_HI, RA
+    |  stwx TMP0, BASE_LO, RA
     |  ins_next2
     break;
   case BC_KCDATA:
@@ -3676,8 +4041,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  ins_next1
     |  lwzx TMP0, KBASE, TMP1		// KBASE-4-cdata_const*4
     |  li TMP2, LJ_TCDATA
-    |  stwux TMP2, RA, BASE
-    |  stw TMP0, 4(RA)
+    |  stwx TMP2, BASE_HI, RA
+    |  stwx TMP0, BASE_LO, RA
     |  ins_next2
     |.endif
     break;
@@ -3687,14 +4052,15 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  slwi RD, RD, 13
     |  srawi RD, RD, 16
     |  ins_next1
-    |   stwux TISNUM, RA, BASE
-    |   stw RD, 4(RA)
+    |   stwx TISNUM, BASE_HI, RA
+    |   stwx RD, BASE_LO, RA
     |  ins_next2
     |.else
     |  // The soft-float approach is faster.
     |  slwi RD, RD, 13
     |  srawi TMP1, RD, 31
     |  xor TMP2, TMP1, RD
+    |  .gpr64 extsw RD, RD
     |  sub TMP2, TMP2, TMP1		// TMP2 = abs(x)
     |  cntlzw TMP3, TMP2
     |  subfic TMP1, TMP3, 0x40d		// TMP1 = exponent-1
@@ -3706,8 +4072,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   add RD, RD, TMP1		// hi = hi + exponent-1
     |    and RD, RD, TMP0		// hi = x == 0 ? 0 : hi
     |  ins_next1
-    |    stwux RD, RA, BASE
-    |    stw ZERO, 4(RA)
+    |    stwx RD, BASE_HI, RA
+    |    stwx ZERO, BASE_LO, RA
     |  ins_next2
     |.endif
     break;
@@ -3723,15 +4089,15 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  srwi TMP1, RD, 3
     |  not TMP0, TMP1
     |  ins_next1
-    |  stwx TMP0, BASE, RA
+    |  stwx TMP0, BASE_HI, RA
     |  ins_next2
     break;
   case BC_KNIL:
     |  // RA = base*8, RD = end*8
-    |  stwx TISNIL, BASE, RA
+    |  stwx TISNIL, BASE_HI, RA
     |   addi RA, RA, 8
     |1:
-    |  stwx TISNIL, BASE, RA
+    |  stwx TISNIL, BASE_HI, RA
     |  cmpw RA, RD
     |   addi RA, RA, 8
     |  blt <1
@@ -3763,10 +4129,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   lwz CARG2, UPVAL:RB->v
     |  andix. TMP3, TMP3, LJ_GC_BLACK	// isblack(uv)
     |    lbz TMP0, UPVAL:RB->closed
-    |   lwz TMP2, 0(RD)
+    |   lwz TMP2, WORD_HI(RD)
     |   stfd f0, 0(CARG2)
     |    cmplwi cr1, TMP0, 0
-    |   lwz TMP1, 4(RD)
+    |   lwz TMP1, WORD_LO(RD)
     |  cror 4*cr0+eq, 4*cr0+eq, 4*cr1+eq
     |   subi TMP2, TMP2, (LJ_TNUMX+1)
     |  bne >2				// Upvalue is closed and black?
@@ -3799,8 +4165,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   lbz TMP3, STR:TMP1->marked
     |   lbz TMP2, UPVAL:RB->closed
     |   li TMP0, LJ_TSTR
-    |   stw STR:TMP1, 4(CARG2)
-    |   stw TMP0, 0(CARG2)
+    |   stw STR:TMP1, WORD_LO(CARG2)
+    |   stw TMP0, WORD_HI(CARG2)
     |  bne >2
     |1:
     |  ins_next
@@ -3837,7 +4203,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  lwzx UPVAL:RB, LFUNC:RB, RA
     |  ins_next1
     |  lwz TMP1, UPVAL:RB->v
-    |  stw TMP0, 0(TMP1)
+    |  stw TMP0, WORD_HI(TMP1)
     |  ins_next2
     break;
 
@@ -3852,6 +4218,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   add CARG2, BASE, RA
     |  bl extern lj_func_closeuv	// (lua_State *L, TValue *level)
     |  lp BASE, L->base
+    |  addi BASEP4, BASE, 4
     |1:
     |  ins_next
     break;
@@ -3870,8 +4237,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // Returns GCfuncL *.
     |  lp BASE, L->base
     |   li TMP0, LJ_TFUNC
-    |  stwux TMP0, RA, BASE
-    |  stw LFUNC:CRET1, 4(RA)
+    |  addi BASEP4, BASE, 4
+    |  stwx TMP0, BASE_HI, RA
+    |  stwx LFUNC:CRET1, BASE_LO, RA
     |  ins_next
     break;
 
@@ -3904,8 +4272,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     }
     |  lp BASE, L->base
     |   li TMP0, LJ_TTAB
-    |  stwux TMP0, RA, BASE
-    |  stw TAB:CRET1, 4(RA)
+    |  addi BASEP4, BASE, 4
+    |  stwx TMP0, BASE_HI, RA
+    |  stwx TAB:CRET1, BASE_LO, RA
     |  ins_next
     if (op == BC_TNEW) {
       |3:
@@ -3938,13 +4307,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
 
   case BC_TGETV:
     |  // RA = dst*8, RB = table*8, RC = key*8
-    |  lwzux CARG1, RB, BASE
-    |  lwzux CARG2, RC, BASE
-    |   lwz TAB:RB, 4(RB)
+    |  lwzx CARG1, BASE_HI, RB
+    |  lwzx CARG2, BASE_HI, RC
+    |   lwzx TAB:RB, BASE_LO, RB
     |.if DUALNUM
-    |   lwz RC, 4(RC)
+    |   lwzx RC, BASE_LO, RC
     |.else
-    |   lfd f0, 0(RC)
+    |   lfdx f0, BASE, RC
     |.endif
     |  checktab CARG1
     |   checknum cr1, CARG2
@@ -3971,8 +4340,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   slwi TMP2, TMP2, 3
     |.endif
     |  ble ->vmeta_tgetv		// Integer key and in array part?
-    |  lwzx TMP0, TMP1, TMP2
-    |   lfdx f14, TMP1, TMP2
+    |  .if ENDIAN_LE
+    |    lfdux f14, TMP1, TMP2
+    |    lwz TMP0, WORD_HI(TMP1)
+    |  .else
+    |    lwzx TMP0, TMP1, TMP2
+    |    lfdx f14, TMP1, TMP2
+    |  .endif
     |  checknil TMP0; beq >2
     |1:
     |  ins_next1
@@ -3991,15 +4365,15 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |5:
     |  checkstr CARG2; bne ->vmeta_tgetv
     |.if not DUALNUM
-    |  lwz STR:RC, 4(RC)
+    |  lwzx STR:RC, BASE_LO, RC
     |.endif
     |  b ->BC_TGETS_Z			// String key?
     break;
   case BC_TGETS:
     |  // RA = dst*8, RB = table*8, RC = str_const*8 (~)
-    |  lwzux CARG1, RB, BASE
+    |  lwzx CARG1, BASE_HI, RB
     |   srwi TMP1, RC, 1
-    |    lwz TAB:RB, 4(RB)
+    |    lwzx TAB:RB, BASE_LO, RB
     |   subfic TMP1, TMP1, -4
     |  checktab CARG1
     |   lwzx STR:RC, KBASE, TMP1	// KBASE-4-str_const*4
@@ -4015,16 +4389,16 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  sub TMP1, TMP0, TMP1
     |  add NODE:TMP2, NODE:TMP2, TMP1	// node = tab->node + (idx*32-idx*8)
     |1:
-    |  lwz CARG1, NODE:TMP2->key
-    |   lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
-    |    lwz CARG2, NODE:TMP2->val
-    |     lwz TMP1, 4+offsetof(Node, val)(NODE:TMP2)
+    |  lwz CARG1, WORD_HI+offsetof(Node, key)(NODE:TMP2)
+    |   lwz TMP0, WORD_LO+offsetof(Node, key)(NODE:TMP2)
+    |    lwz CARG2, WORD_HI+offsetof(Node, val)(NODE:TMP2)
+    |     lwz TMP1, WORD_LO+offsetof(Node, val)(NODE:TMP2)
     |  checkstr CARG1; bne >4
     |   cmpw TMP0, STR:RC; bne >4
     |    checknil CARG2; beq >5		// Key found, but nil value?
     |3:
-    |    stwux CARG2, RA, BASE
-    |     stw TMP1, 4(RA)
+    |    stwx CARG2, BASE_HI, RA
+    |     stwx TMP1, BASE_LO, RA
     |  ins_next
     |
     |4:  // Follow hash chain.
@@ -4045,15 +4419,20 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_TGETB:
     |  // RA = dst*8, RB = table*8, RC = index*8
-    |  lwzux CARG1, RB, BASE
+    |  lwzx CARG1, BASE_HI, RB
     |   srwi TMP0, RC, 3
-    |   lwz TAB:RB, 4(RB)
+    |   lwzx TAB:RB, BASE_LO, RB
     |  checktab CARG1; bne ->vmeta_tgetb
     |  lwz TMP1, TAB:RB->asize
     |   lwz TMP2, TAB:RB->array
     |  cmplw TMP0, TMP1; bge ->vmeta_tgetb
-    |  lwzx TMP1, TMP2, RC
-    |   lfdx f0, TMP2, RC
+    |  .if ENDIAN_LE
+    |    lfdux f0, TMP2, RC
+    |    lwz TMP1, WORD_HI(TMP2)
+    |  .else
+    |    lwzx TMP1, TMP2, RC
+    |    lfdx f0, TMP2, RC
+    |  .endif
     |  checknil TMP1; beq >5
     |1:
     |  ins_next1
@@ -4071,12 +4450,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_TGETR:
     |  // RA = dst*8, RB = table*8, RC = key*8
-    |  add RB, BASE, RB
-    |  lwz TAB:CARG1, 4(RB)
+    |  lwzx TAB:CARG1, BASE_LO, RB
     |.if DUALNUM
-    |  add RC, BASE, RC
     |  lwz TMP0, TAB:CARG1->asize
-    |  lwz CARG2, 4(RC)
+    |  lwzx CARG2, BASE_LO, RC
     |   lwz TMP1, TAB:CARG1->array
     |.else
     |  lfdx f0, BASE, RC
@@ -4096,13 +4473,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
 
   case BC_TSETV:
     |  // RA = src*8, RB = table*8, RC = key*8
-    |  lwzux CARG1, RB, BASE
-    |  lwzux CARG2, RC, BASE
-    |   lwz TAB:RB, 4(RB)
+    |  lwzx CARG1, BASE_HI, RB
+    |  lwzx CARG2, BASE_HI, RC
+    |   lwzx TAB:RB, BASE_LO, RB
     |.if DUALNUM
-    |   lwz RC, 4(RC)
+    |   lwzx RC, BASE_LO, RC
     |.else
-    |   lfd f0, 0(RC)
+    |   lfdx f0, BASE, RC
     |.endif
     |  checktab CARG1
     |   checknum cr1, CARG2
@@ -4129,7 +4506,12 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   slwi TMP0, TMP2, 3
     |.endif
     |  ble ->vmeta_tsetv		// Integer key and in array part?
+    |  .if ENDIAN_LE
+    |   addi TMP2, TMP1, 4
+    |   lwzx TMP2, TMP2, TMP0
+    |  .else
     |   lwzx TMP2, TMP1, TMP0
+    |  .endif
     |  lbz TMP3, TAB:RB->marked
     |    lfdx f14, BASE, RA
     |   checknil TMP2; beq >3
@@ -4152,7 +4534,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |5:
     |  checkstr CARG2; bne ->vmeta_tsetv
     |.if not DUALNUM
-    |  lwz STR:RC, 4(RC)
+    |  lwzx STR:RC, BASE_LO, RC
     |.endif
     |  b ->BC_TSETS_Z			// String key?
     |
@@ -4162,9 +4544,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_TSETS:
     |  // RA = src*8, RB = table*8, RC = str_const*8 (~)
-    |  lwzux CARG1, RB, BASE
+    |  lwzx CARG1, BASE_HI, RB
     |   srwi TMP1, RC, 1
-    |    lwz TAB:RB, 4(RB)
+    |    lwzx TAB:RB, BASE_LO, RB
     |   subfic TMP1, TMP1, -4
     |  checktab CARG1
     |   lwzx STR:RC, KBASE, TMP1	// KBASE-4-str_const*4
@@ -4183,9 +4565,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |    lbz TMP3, TAB:RB->marked
     |  add NODE:TMP2, NODE:TMP2, TMP1	// node = tab->node + (idx*32-idx*8)
     |1:
-    |  lwz CARG1, NODE:TMP2->key
-    |   lwz TMP0, 4+offsetof(Node, key)(NODE:TMP2)
-    |    lwz CARG2, NODE:TMP2->val
+    |  lwz CARG1, WORD_HI+offsetof(Node, key)(NODE:TMP2)
+    |   lwz TMP0, WORD_LO+offsetof(Node, key)(NODE:TMP2)
+    |    lwz CARG2, WORD_HI+offsetof(Node, val)(NODE:TMP2)
     |     lwz NODE:TMP1, NODE:TMP2->next
     |  checkstr CARG1; bne >5
     |   cmpw TMP0, STR:RC; bne >5
@@ -4225,13 +4607,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  beq ->vmeta_tsets		// 'no __newindex' flag NOT set: check.
     |6:
     |  li TMP0, LJ_TSTR
-    |   stw STR:RC, 4(CARG3)
+    |   stw STR:RC, WORD_LO(CARG3)
     |   mr CARG2, TAB:RB
-    |  stw TMP0, 0(CARG3)
+    |  stw TMP0, WORD_HI(CARG3)
     |  bl extern lj_tab_newkey		// (lua_State *L, GCtab *t, TValue *k)
     |  // Returns TValue *.
     |  lp BASE, L->base
     |  stfd f14, 0(CRET1)
+    |   addi BASEP4, BASE, 4
     |  b <3				// No 2nd write barrier needed.
     |
     |7:  // Possible table write barrier for the value. Skip valiswhite check.
@@ -4240,9 +4623,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_TSETB:
     |  // RA = src*8, RB = table*8, RC = index*8
-    |  lwzux CARG1, RB, BASE
+    |  lwzx CARG1, BASE_HI, RB
     |   srwi TMP0, RC, 3
-    |   lwz TAB:RB, 4(RB)
+    |   lwzx TAB:RB, BASE_LO, RB
     |  checktab CARG1; bne ->vmeta_tsetb
     |  lwz TMP1, TAB:RB->asize
     |   lwz TMP2, TAB:RB->array
@@ -4250,7 +4633,12 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  cmplw TMP0, TMP1
     |   lfdx f14, BASE, RA
     |  bge ->vmeta_tsetb
-    |  lwzx TMP1, TMP2, RC
+    |  .if ENDIAN_LE
+    |    addi TMP1, TMP2, 4
+    |    lwzx TMP1, TMP1, RC
+    |  .else
+    |    lwzx TMP1, TMP2, RC
+    |  .endif
     |  checknil TMP1; beq >5
     |1:
     |  andix. TMP0, TMP3, LJ_GC_BLACK	// isblack(table)
@@ -4274,13 +4662,11 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_TSETR:
     |  // RA = dst*8, RB = table*8, RC = key*8
-    |  add RB, BASE, RB
-    |  lwz TAB:CARG2, 4(RB)
+    |  lwzx TAB:CARG2, BASE_LO, RB
     |.if DUALNUM
-    |  add RC, BASE, RC
     |    lbz TMP3, TAB:CARG2->marked
     |  lwz TMP0, TAB:CARG2->asize
-    |  lwz CARG3, 4(RC)
+    |  lwzx CARG3, BASE_LO, RC
     |   lwz TMP1, TAB:CARG2->array
     |.else
     |  lfdx f0, BASE, RC
@@ -4311,9 +4697,9 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  add RA, BASE, RA
     |1:
     |   add TMP3, KBASE, RD
-    |  lwz TAB:CARG2, -4(RA)		// Guaranteed to be a table.
+    |  lwz TAB:CARG2, WORD_LO-8(RA)	// Guaranteed to be a table.
     |    addic. TMP0, MULTRES, -8
-    |   lwz TMP3, 4(TMP3)		// Integer constant is in lo-word.
+    |   lwz TMP3, WORD_LO(TMP3)		// Integer constant is in lo-word.
     |    srwi CARG3, TMP0, 3
     |    beq >4				// Nothing to copy?
     |  add CARG3, CARG3, TMP3
@@ -4362,8 +4748,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_CALL:
     |  // RA = base*8, (RB = (nresults+1)*8,) RC = (nargs+1)*8
     |  mr TMP2, BASE
-    |  lwzux TMP0, BASE, RA
-    |   lwz LFUNC:RB, 4(BASE)
+    |  lwzux2 TMP0, LFUNC:RB, BASE, RA
     |    subi NARGS8:RC, NARGS8:RC, 8
     |   addi BASE, BASE, 8
     |  checkfunc TMP0; bne ->vmeta_call
@@ -4377,8 +4762,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     break;
   case BC_CALLT:
     |  // RA = base*8, (RB = 0,) RC = (nargs+1)*8
-    |  lwzux TMP0, RA, BASE
-    |   lwz LFUNC:RB, 4(RA)
+    |  lwzux2 TMP0, LFUNC:RB, RA, BASE
     |    subi NARGS8:RC, NARGS8:RC, 8
     |    lwz TMP1, FRAME_PC(BASE)
     |  checkfunc TMP0
@@ -4430,12 +4814,12 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // RA = base*8, (RB = (nresults+1)*8, RC = (nargs+1)*8 ((2+1)*8))
     |  mr TMP2, BASE
     |  add BASE, BASE, RA
-    |  lwz TMP1, -24(BASE)
-    |   lwz LFUNC:RB, -20(BASE)
+    |  lwz TMP1, WORD_HI-24(BASE)
+    |   lwz LFUNC:RB, WORD_LO-24(BASE)
     |    lfd f1, -8(BASE)
     |    lfd f0, -16(BASE)
-    |  stw TMP1, 0(BASE)		// Copy callable.
-    |   stw LFUNC:RB, 4(BASE)
+    |  stw TMP1, WORD_HI(BASE)		// Copy callable.
+    |   stw LFUNC:RB, WORD_LO(BASE)
     |  checkfunc TMP1
     |    stfd f1, 16(BASE)		// Copy control var.
     |     li NARGS8:RC, 16		// Iterators get 2 arguments.
@@ -4450,8 +4834,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // NYI: add hotloop, record BC_ITERN.
     |.endif
     |  add RA, BASE, RA
-    |  lwz TAB:RB, -12(RA)
-    |  lwz RC, -4(RA)			// Get index from control var.
+    |  lwz TAB:RB, WORD_LO-16(RA)
+    |  lwz RC, WORD_LO-8(RA)		// Get index from control var.
     |  lwz TMP0, TAB:RB->asize
     |  lwz TMP1, TAB:RB->array
     |   addi PC, PC, 4
@@ -4459,14 +4843,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  cmplw RC, TMP0
     |   slwi TMP3, RC, 3
     |  bge >5				// Index points after array part?
-    |  lwzx TMP2, TMP1, TMP3
-    |   lfdx f0, TMP1, TMP3
+    |  lfdux f0, TMP3, TMP1
+    |   lwz TMP2, WORD_HI(TMP3)
     |  checknil TMP2
     |     lwz INS, -4(PC)
     |  beq >4
     |.if DUALNUM
-    |   stw RC, 4(RA)
-    |   stw TISNUM, 0(RA)
+    |   stw RC, WORD_LO(RA)
+    |   stw TISNUM, WORD_HI(RA)
     |.else
     |   tonum_u f1, RC
     |.endif
@@ -4474,7 +4858,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |     addis TMP3, PC, -(BCBIAS_J*4 >> 16)
     |  stfd f0, 8(RA)
     |     decode_RD4 TMP1, INS
-    |    stw RC, -4(RA)			// Update control var.
+    |    stw RC, WORD_LO-8(RA)		// Update control var.
     |     add PC, TMP1, TMP3
     |.if not DUALNUM
     |   stfd f1, 0(RA)
@@ -4496,9 +4880,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  bgty <3
     |   slwi RB, RC, 3
     |   sub TMP3, TMP3, RB
-    |  lwzx RB, TMP2, TMP3
-    |  lfdx f0, TMP2, TMP3
-    |   add NODE:TMP3, TMP2, TMP3
+    |  lfdux f0, TMP3, TMP2
+    |  lwz RB, WORD_HI(TMP3)
     |  checknil RB
     |     lwz INS, -4(PC)
     |  beq >7
@@ -4510,7 +4893,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   stfd f1, 0(RA)
     |    addi RC, RC, 1
     |     add PC, TMP1, TMP2
-    |    stw RC, -4(RA)			// Update control var.
+    |    stw RC, WORD_LO-8(RA)		// Update control var.
     |  b <3
     |
     |7:  // Skip holes in hash part.
@@ -4521,10 +4904,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_ISNEXT:
     |  // RA = base*8, RD = target (points to ITERN)
     |  add RA, BASE, RA
-    |  lwz TMP0, -24(RA)
-    |  lwz CFUNC:TMP1, -20(RA)
-    |   lwz TMP2, -16(RA)
-    |    lwz TMP3, -8(RA)
+    |  lwz TMP0, WORD_HI-24(RA)
+    |  lwz CFUNC:TMP1, WORD_LO-24(RA)
+    |   lwz TMP2, WORD_HI-16(RA)
+    |    lwz TMP3, WORD_HI-8(RA)
     |   cmpwi cr0, TMP2, LJ_TTAB
     |  cmpwi cr1, TMP0, LJ_TFUNC
     |    cmpwi cr6, TMP3, LJ_TNIL
@@ -4538,17 +4921,25 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  bne cr0, >5
     |  lus TMP1, 0xfffe
     |  ori TMP1, TMP1, 0x7fff
-    |  stw ZERO, -4(RA)			// Initialize control var.
-    |  stw TMP1, -8(RA)
+    |  stw ZERO, WORD_LO-8(RA)		// Initialize control var.
+    |  stw TMP1, WORD_HI-8(RA)
     |    addis PC, TMP3, -(BCBIAS_J*4 >> 16)
     |1:
     |  ins_next
     |5:  // Despecialize bytecode if any of the checks fail.
     |  li TMP0, BC_JMP
     |   li TMP1, BC_ITERC
+    |  .if ENDIAN_LE
+    |  stb TMP0, -4(PC)
+    |  .else
     |  stb TMP0, -1(PC)
+    |  .endif
     |    addis PC, TMP3, -(BCBIAS_J*4 >> 16)
+    |  .if ENDIAN_LE
+    |   stb TMP1, 0(PC)
+    |  .else
     |   stb TMP1, 3(PC)
+    |  .endif
     |  b <1
     break;
 
@@ -4582,7 +4973,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |    addi RA, RA, 8
     |   blt cr1, <1			// More vararg slots?
     |2:  // Fill up remainder with nil.
-    |  stw TISNIL, 0(RA)
+    |  stw TISNIL, WORD_HI(RA)
     |  cmplw RA, TMP2
     |   addi RA, RA, 8
     |  blt <2
@@ -4619,6 +5010,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  add RA, BASE, RA
     |  add RC, BASE, SAVE0
     |  subi TMP3, BASE, 8
+    |  addi BASEP4, BASE, 4
     |  b <6
     break;
 
@@ -4667,13 +5059,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  bgt >6
     |   sub BASE, TMP2, RA
     |  lwz LFUNC:TMP1, FRAME_FUNC(BASE)
+    |  addi BASEP4, BASE, 4
     |  ins_next1
     |  lwz TMP1, LFUNC:TMP1->pc
     |  lwz KBASE, PC2PROTO(k)(TMP1)
     |  ins_next2
     |
     |6:  // Fill up results with nil.
-    |  subi TMP1, RD, 8
+    |  addi TMP1, RD, WORD_HI-8
     |   addi RD, RD, 8
     |  stwx TISNIL, TMP2, TMP1
     |  b <5
@@ -4709,13 +5102,14 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  bgt >6
     |   sub BASE, TMP2, RA
     |  lwz LFUNC:TMP1, FRAME_FUNC(BASE)
+    |  addi BASEP4, BASE, 4
     |  ins_next1
     |  lwz TMP1, LFUNC:TMP1->pc
     |  lwz KBASE, PC2PROTO(k)(TMP1)
     |  ins_next2
     |
     |6:  // Fill up results with nil.
-    |  subi TMP1, RD, 8
+    |  addi TMP1, RD, WORD_HI-8
     |   addi RD, RD, 8
     |  stwx TISNIL, TMP2, TMP1
     |  b <5
@@ -4741,11 +5135,13 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     vk = (op == BC_IFORL || op == BC_JFORL);
     |.if DUALNUM
     |  // Integer loop.
-    |  lwzux TMP1, RA, BASE
-    |   lwz CARG1, FORL_IDX*8+4(RA)
+    |  lwzux2 TMP1, CARG1, RA, BASE
+    if (vk) {
+      |  mtxer ZERO
+    }
     |  cmplw cr0, TMP1, TISNUM
     if (vk) {
-      |   lwz CARG3, FORL_STEP*8+4(RA)
+      |   lwz CARG3, FORL_STEP*8+WORD_LO(RA)
       |  bne >9
       |.if GPR64
       |  // Need to check overflow for (a<<32) + (b<<32).
@@ -4757,15 +5153,15 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
       |  addo. CARG1, CARG1, CARG3
       |.endif
       |    cmpwi cr6, CARG3, 0
-      |   lwz CARG2, FORL_STOP*8+4(RA)
-      |  bso >6
+      |   lwz CARG2, FORL_STOP*8+WORD_LO(RA)
+      |  bso >2
       |4:
-      |  stw CARG1, FORL_IDX*8+4(RA)
+      |  stw CARG1, FORL_IDX*8+WORD_LO(RA)
     } else {
-      |  lwz TMP3, FORL_STEP*8(RA)
-      |   lwz CARG3, FORL_STEP*8+4(RA)
-      |  lwz TMP2, FORL_STOP*8(RA)
-      |   lwz CARG2, FORL_STOP*8+4(RA)
+      |  lwz TMP3, FORL_STEP*8+WORD_HI(RA)
+      |   lwz CARG3, FORL_STEP*8+WORD_LO(RA)
+      |  lwz TMP2, FORL_STOP*8+WORD_HI(RA)
+      |   lwz CARG2, FORL_STOP*8+WORD_LO(RA)
       |  cmplw cr7, TMP3, TISNUM
       |  cmplw cr1, TMP2, TISNUM
       |  crand 4*cr0+eq, 4*cr0+eq, 4*cr7+eq
@@ -4776,11 +5172,11 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |    blt cr6, >5
     |  cmpw CARG1, CARG2
     |1:
-    |   stw TISNUM, FORL_EXT*8(RA)
+    |   stw TISNUM, FORL_EXT*8+WORD_HI(RA)
     if (op != BC_JFORL) {
       |  srwi RD, RD, 1
     }
-    |   stw CARG1, FORL_EXT*8+4(RA)
+    |   stw CARG1, FORL_EXT*8+WORD_LO(RA)
     if (op != BC_JFORL) {
       |  add RD, PC, RD
     }
@@ -4800,11 +5196,6 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |5:  // Invert check for negative step.
     |  cmpw CARG2, CARG1
     |  b <1
-    if (vk) {
-      |6:  // Potential overflow.
-      |  checkov TMP0, <4		// Ignore unrelated overflow.
-      |  b <2
-    }
     |.endif
     if (vk) {
       |.if DUALNUM
@@ -4815,14 +5206,19 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
       |.endif
       |  lfd f3, FORL_STEP*8(RA)
       |  lfd f2, FORL_STOP*8(RA)
-      |   lwz TMP3, FORL_STEP*8(RA)
+      |   lwz TMP3, FORL_STEP*8+WORD_HI(RA)
       |  fadd f1, f1, f3
       |  stfd f1, FORL_IDX*8(RA)
     } else {
       |.if DUALNUM
       |9:  // FP loop.
       |.else
+      |.if ENDIAN_LE
+      |  lwzx TMP1, RA, BASE_LO
+      |  add RA, RA, BASE
+      |.else
       |  lwzux TMP1, RA, BASE
+      |.endif
       |  lwz TMP3, FORL_STEP*8(RA)
       |  lwz TMP2, FORL_STOP*8(RA)
       |  cmplw cr0, TMP1, TISNUM
@@ -4903,17 +5299,16 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
 #endif
   case BC_IITERL:
     |  // RA = base*8, RD = target
-    |  lwzux TMP1, RA, BASE
-    |   lwz TMP2, 4(RA)
+    |  lwzux2 TMP1, TMP2, RA, BASE
     |  checknil TMP1; beq >1		// Stop if iterator returned nil.
     if (op == BC_JITERL) {
-      |  stw TMP1, -8(RA)
-      |   stw TMP2, -4(RA)
+      |  stw TMP1, WORD_HI-8(RA)
+      |   stw TMP2, WORD_LO-8(RA)
       |  b =>BC_JLOOP
     } else {
       |  branch_RD			// Otherwise save control var + branch.
-      |  stw TMP1, -8(RA)
-      |   stw TMP2, -4(RA)
+      |  stw TMP1, WORD_HI-8(RA)
+      |   stw TMP2, WORD_LO-8(RA)
     }
     |1:
     |  ins_next
@@ -4942,7 +5337,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  // Traces on PPC don't store the trace number, so use 0.
     |   stw ZERO, DISPATCH_GL(vmstate)(DISPATCH)
     |  lwzx TRACE:TMP2, TMP1, RD
-    |  clrso TMP1
+    |  mtxer ZERO
     |  lp TMP2, TRACE:TMP2->mcode
     |   stw BASE, DISPATCH_GL(jit_base)(DISPATCH)
     |  mtctr TMP2
@@ -4994,7 +5389,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     }
     |
     |3:  // Clear missing parameters.
-    |  stwx TISNIL, BASE, NARGS8:RC
+    |  stwx TISNIL, BASE_HI, NARGS8:RC
     |  addi NARGS8:RC, NARGS8:RC, 8
     |  b <2
     break;
@@ -5011,11 +5406,11 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  lwz TMP2, L->maxstack
     |   add TMP1, BASE, RC
     |  add TMP0, RA, RC
-    |   stw LFUNC:RB, 4(TMP1)		// Store copy of LFUNC.
+    |   stw LFUNC:RB, WORD_LO(TMP1)	// Store copy of LFUNC.
     |   addi TMP3, RC, 8+FRAME_VARG
     |    lwz KBASE, -4+PC2PROTO(k)(PC)
     |  cmplw TMP0, TMP2
-    |   stw TMP3, 0(TMP1)		// Store delta + FRAME_VARG.
+    |   stw TMP3, WORD_HI(TMP1)		// Store delta + FRAME_VARG.
     |  bge ->vm_growstack_l
     |  lbz TMP2, -4+PC2PROTO(numparams)(PC)
     |   mr RA, BASE
@@ -5026,18 +5421,19 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |  beq >3
     |1:
     |  cmplw RA, RC			// Less args than parameters?
-    |   lwz TMP0, 0(RA)
-    |   lwz TMP3, 4(RA)
+    |   lwz TMP0, WORD_HI(RA)
+    |   lwz TMP3, WORD_LO(RA)
     |  bge >4
-    |    stw TISNIL, 0(RA)		// Clear old fixarg slot (help the GC).
+    |    stw TISNIL, WORD_HI(RA)	// Clear old fixarg slot (help the GC).
     |    addi RA, RA, 8
     |2:
     |  addic. TMP2, TMP2, -1
-    |   stw TMP0, 8(TMP1)
-    |   stw TMP3, 12(TMP1)
+    |   stw TMP0, WORD_HI+8(TMP1)
+    |   stw TMP3, WORD_LO+8(TMP1)
     |    addi TMP1, TMP1, 8
     |  bne <1
     |3:
+    |  addi BASEP4, BASE, 4
     |  ins_next2
     |
     |4:  // Clear missing parameters.
@@ -5049,35 +5445,35 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
   case BC_FUNCCW:
     |  // BASE = new base, RA = BASE+framesize*8, RB = CFUNC, RC = nargs*8
     if (op == BC_FUNCC) {
-      |  lp RD, CFUNC:RB->f
+      |  lp FUNCREG, CFUNC:RB->f
     } else {
-      |  lp RD, DISPATCH_GL(wrapf)(DISPATCH)
+      |  lp FUNCREG, DISPATCH_GL(wrapf)(DISPATCH)
     }
     |   add TMP1, RA, NARGS8:RC
     |   lwz TMP2, L->maxstack
-    |  .toc lp TMP3, 0(RD)
+    |  .opd lp TMP3, 0(FUNCREG)
     |    add RC, BASE, NARGS8:RC
     |   stp BASE, L->base
     |   cmplw TMP1, TMP2
     |    stp RC, L->top
     |     li_vmstate C
-    |.if TOC
+    |.if OPD
     |  mtctr TMP3
     |.else
-    |  mtctr RD
+    |  mtctr FUNCREG
     |.endif
     if (op == BC_FUNCCW) {
       |  lp CARG2, CFUNC:RB->f
     }
     |  mr CARG1, L
     |   bgt ->vm_growstack_c		// Need to grow stack.
-    |  .toc lp TOCREG, TOC_OFS(RD)
-    |  .tocenv lp ENVREG, ENV_OFS(RD)
+    |  .opd lp TOCREG, TOC_OFS(FUNCREG)
+    |  .opdenv lp ENVREG, ENV_OFS(FUNCREG)
     |     st_vmstate
     |  bctrl				// (lua_State *L [, lua_CFunction f])
+    |  .toc lp TOCREG, SAVE_TOC
     |  // Returns nresults.
     |  lp BASE, L->base
-    |  .toc ld TOCREG, SAVE_TOC
     |   slwi RD, CRET1, 3
     |  lp TMP1, L->top
     |    li_vmstate INTERP
@@ -5128,7 +5524,11 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.byte 0x1\n"
 	"\t.string \"\"\n"
 	"\t.uleb128 0x1\n"
+#if LJ_ARCH_PPC32ON64
+	"\t.sleb128 -8\n"
+#else
 	"\t.sleb128 -4\n"
+#endif
 	"\t.byte 65\n"
 	"\t.byte 0xc\n\t.uleb128 1\n\t.uleb128 0\n"
 	"\t.align 2\n"
@@ -5141,14 +5541,24 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.long .Lbegin\n"
 	"\t.long %d\n"
 	"\t.byte 0xe\n\t.uleb128 %d\n"
+#if LJ_ARCH_PPC32ON64
+	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -2\n"
+	"\t.byte 0x11\n\t.uleb128 70\n\t.sleb128 -1\n",
+#else
 	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
 	"\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
+#endif
 	fcofs, CFRAME_SIZE);
     for (i = 14; i <= 31; i++)
       fprintf(ctx->fp,
 	"\t.byte %d\n\t.uleb128 %d\n"
 	"\t.byte %d\n\t.uleb128 %d\n",
-	0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
+#if LJ_ARCH_PPC32ON64
+	0x80+i, 19+(31-i), 0x80+32+i, 1+(31-i)
+#else
+	0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i)
+#endif
+      );
     fprintf(ctx->fp,
 	"\t.align 2\n"
 	".LEFDE0:\n\n");
@@ -5164,8 +5574,12 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.long lj_vm_ffi_call\n"
 #endif
 	"\t.long %d\n"
+#if LJ_ARCH_PPC32ON64
+	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -2\n"
+#else
 	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
-	"\t.byte 0x8e\n\t.uleb128 2\n"
+#endif
+	"\t.byte 0x8e\n\t.uleb128 1\n"
 	"\t.byte 0xd\n\t.uleb128 0xe\n"
 	"\t.align 2\n"
 	".LEFDE1:\n\n", (int)ctx->codesz - fcofs);
@@ -5180,7 +5594,11 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.byte 0x1\n"
 	"\t.string \"zPR\"\n"
 	"\t.uleb128 0x1\n"
+#if LJ_ARCH_PPC32ON64
+	"\t.sleb128 -8\n"
+#else
 	"\t.sleb128 -4\n"
+#endif
 	"\t.byte 65\n"
 	"\t.uleb128 6\n"			/* augmentation length */
 	"\t.byte 0x1b\n"			/* pcrel|sdata4 */
@@ -5198,14 +5616,24 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.long %d\n"
 	"\t.uleb128 0\n"			/* augmentation length */
 	"\t.byte 0xe\n\t.uleb128 %d\n"
+#if LJ_ARCH_PPC32ON64
+	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -2\n"
+	"\t.byte 0x11\n\t.uleb128 70\n\t.sleb128 -1\n",
+#else
 	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
 	"\t.byte 0x5\n\t.uleb128 70\n\t.uleb128 55\n",
+#endif
 	fcofs, CFRAME_SIZE);
     for (i = 14; i <= 31; i++)
       fprintf(ctx->fp,
 	"\t.byte %d\n\t.uleb128 %d\n"
 	"\t.byte %d\n\t.uleb128 %d\n",
-	0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i));
+#if LJ_ARCH_PPC32ON64
+	0x80+i, 19+(31-i), 0x80+32+i, 1+(31-i)
+#else
+	0x80+i, 37+(31-i), 0x80+32+i, 2+2*(31-i)
+#endif
+      );
     fprintf(ctx->fp,
 	"\t.align 2\n"
 	".LEFDE2:\n\n");
@@ -5233,8 +5661,12 @@ static void emit_asm_debug(BuildCtx *ctx)
 	"\t.long lj_vm_ffi_call-.\n"
 	"\t.long %d\n"
 	"\t.uleb128 0\n"			/* augmentation length */
+#if LJ_ARCH_PPC32ON64
+	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -2\n"
+#else
 	"\t.byte 0x11\n\t.uleb128 65\n\t.sleb128 -1\n"
-	"\t.byte 0x8e\n\t.uleb128 2\n"
+#endif
+	"\t.byte 0x8e\n\t.uleb128 1\n"
 	"\t.byte 0xd\n\t.uleb128 0xe\n"
 	"\t.align 2\n"
 	".LEFDE3:\n\n", (int)ctx->codesz - fcofs);