forked from pool/glibc
3bf6c22181
Refresh glibc-2.16-avx.patch and handle FMA4. OBS-URL: https://build.opensuse.org/request/show/116778 OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=179
249 lines
8.8 KiB
Diff
249 lines
8.8 KiB
Diff
qcommit afc5ed09cbce5d6fd48b3a8c5ec427b31f996880
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Author: Ulrich Drepper <drepper@gmail.com>
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Date: Thu Jan 26 07:45:14 2012 -0500
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Reset bit_AVX in __cpu_features is OS support is missing
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2012-01-26 Ulrich Drepper <drepper@gmail.com>
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[BZ #13583]
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* sysdeps/x86_64/multiarch/init-arch.h: Define bit_OSXSAVE.
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* sysdeps/x86_64/multiarch/init-arch.c (__init_cpu_features): If
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bit_AVX is set also check OSXAVE/XCR0 and reset bit_AVX if necessary.
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Also contains selected changes from commits 08cf777f9e7f6d826658a99c7d77a359f73a45bf
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and 56f6f6a2403cfa7267cad722597113be35ecf70d.
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diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c
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index 65b0ee9..4fabbee 100644
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--- a/sysdeps/x86_64/multiarch/init-arch.c
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+++ b/sysdeps/x86_64/multiarch/init-arch.c
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@@ -1,6 +1,6 @@
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/* Initialize CPU feature data.
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This file is part of the GNU C Library.
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- Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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+ Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
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Contributed by Ulrich Drepper <drepper@redhat.com>.
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The GNU C Library is free software; you can redistribute it and/or
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@@ -144,6 +144,18 @@ __init_cpu_features (void)
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else
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kind = arch_kind_other;
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+ if (__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx & bit_AVX)
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+ {
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+ /* Reset the AVX bit in case OSXSAVE is disabled. */
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+ if ((__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx & bit_OSXSAVE) == 0
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+ || ({ unsigned int xcrlow;
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+ unsigned int xcrhigh;
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+ asm ("xgetbv"
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+ : "=a" (xcrlow), "=d" (xcrhigh) : "c" (0));
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+ (xcrlow & 6) != 6; }))
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+ __cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx &= ~bit_AVX;
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+ }
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+
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__cpu_features.family = family;
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__cpu_features.model = model;
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atomic_write_barrier ();
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diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h
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index 2a1df39..408e5ae 100644
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--- a/sysdeps/x86_64/multiarch/init-arch.h
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+++ b/sysdeps/x86_64/multiarch/init-arch.h
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@@ -1,5 +1,5 @@
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/* This file is part of the GNU C Library.
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- Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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+ Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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@@ -27,6 +27,7 @@
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#define bit_SSSE3 (1 << 9)
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#define bit_SSE4_1 (1 << 19)
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#define bit_SSE4_2 (1 << 20)
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+#define bit_OSXSAVE (1 << 27)
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#define bit_AVX (1 << 28)
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#define bit_POPCOUNT (1 << 23)
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#define bit_FMA (1 << 12)
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Index: glibc-2.15/config.h.in
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===================================================================
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--- glibc-2.15.orig/config.h.in
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+++ glibc-2.15/config.h.in
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@@ -102,7 +102,7 @@
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certain registers (CR0, MQ, CTR, LR) in asm statements. */
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#undef BROKEN_PPC_ASM_CR0
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-/* Defined on SPARC if ld doesn't handle R_SPARC_WDISP22 against .hidden
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+/* Defined on SPARC if ld does not handle R_SPARC_WDISP22 against .hidden
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symbol. sysdeps/sparc/sparc32/elf/configure. */
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#undef BROKEN_SPARC_WDISP22
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@@ -118,17 +118,20 @@
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/* Define if gcc supports AVX. */
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#undef HAVE_AVX_SUPPORT
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+/* Define if gcc supports VEX encoding. */
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+#undef HAVE_SSE2AVX_SUPPORT
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+
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/* Define if gcc supports FMA4. */
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#undef HAVE_FMA4_SUPPORT
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-/* Define if the compiler's exception support is based on libunwind. */
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+/* Define if the compiler\'s exception support is based on libunwind. */
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#undef HAVE_CC_WITH_LIBUNWIND
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/* Define if the access to static and hidden variables is position independent
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and does not need relocations. */
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#undef PI_STATIC_AND_HIDDEN
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-/* Define this to disable the `hidden_proto' et al macros in
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+/* Define this to disable the 'hidden_proto' et al macros in
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include/libc-symbols.h that avoid PLT slots in the shared objects. */
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#undef NO_HIDDEN
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Index: glibc-2.15/sysdeps/i386/configure
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===================================================================
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--- glibc-2.15.orig/sysdeps/i386/configure
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+++ glibc-2.15/sysdeps/i386/configure
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@@ -756,6 +756,29 @@ if test $libc_cv_cc_avx = yes; then
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fi
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX encoding of SSE instructions" >&5
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+$as_echo_n "checking for AVX encoding of SSE instructions... " >&6; }
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+if ${libc_cv_cc_sse2avx+:} false; then :
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+ $as_echo_n "(cached) " >&6
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+else
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+ if { ac_try='${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null'
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+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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+ (eval $ac_try) 2>&5
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+ ac_status=$?
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+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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+ test $ac_status = 0; }; }; then
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+ libc_cv_cc_sse2avx=yes
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+else
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+ libc_cv_cc_sse2avx=no
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+fi
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+fi
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse2avx" >&5
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+$as_echo "$libc_cv_cc_sse2avx" >&6; }
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+if test $libc_cv_cc_sse2avx = yes; then
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+ $as_echo "#define HAVE_SSE2AVX_SUPPORT 1" >>confdefs.h
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+
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+fi
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+
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for FMA4 support" >&5
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$as_echo_n "checking for FMA4 support... " >&6; }
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if ${libc_cv_cc_fma4+:} false; then :
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Index: glibc-2.15/sysdeps/i386/configure.in
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===================================================================
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--- glibc-2.15.orig/sysdeps/i386/configure.in
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+++ glibc-2.15/sysdeps/i386/configure.in
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@@ -67,6 +67,17 @@ if test $libc_cv_cc_avx = yes; then
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AC_DEFINE(HAVE_AVX_SUPPORT)
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fi
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+dnl Check if -msse2avx works.
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+AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
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+if AC_TRY_COMMAND([${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null]); then
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+ libc_cv_cc_sse2avx=yes
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+else
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+ libc_cv_cc_sse2avx=no
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+fi])
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+if test $libc_cv_cc_sse2avx = yes; then
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+ AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
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+fi
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+
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dnl Check if -mfma4 works.
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AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
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if AC_TRY_COMMAND([${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null]); then
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Index: glibc-2.15/sysdeps/x86_64/fpu/multiarch/Makefile
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===================================================================
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--- glibc-2.15.orig/sysdeps/x86_64/fpu/multiarch/Makefile
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+++ glibc-2.15/sysdeps/x86_64/fpu/multiarch/Makefile
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@@ -34,21 +34,21 @@ CFLAGS-s_sin-fma4.c = -mfma4
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CFLAGS-s_tan-fma4.c = -mfma4
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endif
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-ifeq ($(config-cflags-avx),yes)
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+ifeq ($(config-cflags-sse2avx),yes)
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libm-sysdep_routines += e_exp-avx e_log-avx s_atan-avx \
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e_atan2-avx s_sin-avx s_tan-avx \
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mplog-avx mpa-avx slowexp-avx \
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mpexp-avx
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-CFLAGS-e_atan2-avx.c = -mavx
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-CFLAGS-e_exp-avx.c = -mavx
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-CFLAGS-e_log-avx.c = -mavx
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-CFLAGS-mpa-avx.c = -mavx
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-CFLAGS-mpexp-avx.c = -mavx
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-CFLAGS-mplog-avx.c = -mavx
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-CFLAGS-s_atan-avx.c = -mavx
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-CFLAGS-s_sin-avx.c = -mavx
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-CFLAGS-slowexp-avx.c = -mavx
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-CFLAGS-s_tan-avx.c = -mavx
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+CFLAGS-e_atan2-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-e_exp-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-e_log-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-mpa-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-mpexp-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-mplog-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-s_atan-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-s_sin-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-slowexp-avx.c = -msse2avx -DSSE2AVX
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+CFLAGS-s_tan-avx.c = -msse2avx -DSSE2AVX
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endif
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endif
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Index: glibc-2.15/config.make.in
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===================================================================
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--- glibc-2.15.orig/config.make.in
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+++ glibc-2.15/config.make.in
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@@ -36,6 +36,7 @@ asflags-cpu = @libc_cv_cc_submachine@
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config-cflags-sse4 = @libc_cv_cc_sse4@
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config-cflags-avx = @libc_cv_cc_avx@
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+config-cflags-sse2avx = @libc_cv_cc_sse2avx@
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config-cflags-novzeroupper = @libc_cv_cc_novzeroupper@
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config-asflags-i686 = @libc_cv_as_i686@
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Index: glibc-2.15/configure
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===================================================================
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--- glibc-2.15.orig/configure
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+++ glibc-2.15/configure
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@@ -625,6 +625,7 @@ use_ldconfig
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libc_cv_as_i686
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libc_cv_cc_fma4
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libc_cv_cc_novzeroupper
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+libc_cv_cc_sse2avx
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libc_cv_cc_avx
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libc_cv_cc_sse4
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libc_cv_cpp_asm_debuginfo
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Index: glibc-2.15/configure.in
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===================================================================
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--- glibc-2.15.orig/configure.in
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+++ glibc-2.15/configure.in
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@@ -2338,6 +2338,7 @@ dnl sysdeps/CPU/configure.in checks set
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AC_SUBST(libc_cv_cpp_asm_debuginfo)
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AC_SUBST(libc_cv_cc_sse4)
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AC_SUBST(libc_cv_cc_avx)
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+AC_SUBST(libc_cv_cc_sse2avx)
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AC_SUBST(libc_cv_cc_novzeroupper)
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AC_SUBST(libc_cv_cc_fma4)
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AC_SUBST(libc_cv_as_i686)
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--- eglibc-2.15-fma4-orig/sysdeps/x86_64/multiarch/init-arch.c 2012-05-07 10:02:38.869334673 -0700
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+++ eglibc-2.15-fma4-orig/sysdeps/x86_64/multiarch/init-arch.c 2012-05-07 10:01:16.217334959 -0700
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@@ -156,6 +156,11 @@
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__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx &= ~bit_AVX;
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}
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+ /* FMA4 depends on AVX support */
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+ if (__cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ecx & bit_FMA4
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+ && (__cpu_features.cpuid[COMMON_CPUID_INDEX_1].ecx & bit_AVX) == 0)
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+ __cpu_features.cpuid[COMMON_CPUID_INDEX_80000001].ecx &= ~bit_FMA4;
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+
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__cpu_features.family = family;
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__cpu_features.model = model;
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atomic_write_barrier ();
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