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Accepting request 230484 from home:Andreas_Schwab:Factory

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- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
  (bnc#872573, BZ #16740, BZ #16619)

OBS-URL: https://build.opensuse.org/request/show/230484
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=362
This commit is contained in:
Andreas Schwab 2014-04-17 14:02:34 +00:00 committed by Git OBS Bridge
parent c85422d0b9
commit 96e20a41d7
7 changed files with 230 additions and 9 deletions
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6
glibc-testsuite.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
(bnc#872573, BZ #16740, BZ #16619)
-------------------------------------------------------------------
Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de

9
glibc-testsuite.spec
View File

@ -250,6 +250,10 @@ Patch1007: ppc64-copysign.patch
Patch1008: nextafterl-ibm-ldouble.patch
# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
Patch1009: ibm-long-double-math.patch
# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
Patch1010: ibm-long-double-frexpl.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch1011: aarch64-setcontext.patch
###
# Patches awaiting upstream approval
@ -264,8 +268,6 @@ Patch2002: ldd-system-interp.patch
Patch2003: abort-no-flush.patch
# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
Patch2004: pthread-mutex-trylock-elision.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch2005: aarch64-setcontext.patch
# Non-glibc patches
# PATCH-FIX-OPENSUSE Remove debianisms from manpages
@ -476,13 +478,14 @@ rm nscd/s-stamp
%patch1007 -p1
%patch1008 -p1
%patch1009 -p1
%patch1010 -p1
%patch1011 -p1
%patch2000 -p1
%patch2001 -p1
%patch2002 -p1
%patch2003 -p1
%patch2004 -p1
%patch2005 -p1
%patch3000

6
glibc-utils.changes
View File

@ -1,3 +1,9 @@
-------------------------------------------------------------------
Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
(bnc#872573, BZ #16740, BZ #16619)
-------------------------------------------------------------------
Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de

9
glibc-utils.spec
View File

@ -249,6 +249,10 @@ Patch1007: ppc64-copysign.patch
Patch1008: nextafterl-ibm-ldouble.patch
# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
Patch1009: ibm-long-double-math.patch
# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
Patch1010: ibm-long-double-frexpl.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch1011: aarch64-setcontext.patch
###
# Patches awaiting upstream approval
@ -263,8 +267,6 @@ Patch2002: ldd-system-interp.patch
Patch2003: abort-no-flush.patch
# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
Patch2004: pthread-mutex-trylock-elision.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch2005: aarch64-setcontext.patch
# Non-glibc patches
# PATCH-FIX-OPENSUSE Remove debianisms from manpages
@ -476,13 +478,14 @@ rm nscd/s-stamp
%patch1007 -p1
%patch1008 -p1
%patch1009 -p1
%patch1010 -p1
%patch1011 -p1
%patch2000 -p1
%patch2001 -p1
%patch2002 -p1
%patch2003 -p1
%patch2004 -p1
%patch2005 -p1
%patch3000

6
glibc.changes
View File

@ -1,3 +1,9 @@
-------------------------------------------------------------------
Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
(bnc#872573, BZ #16740, BZ #16619)
-------------------------------------------------------------------
Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de

9
glibc.spec
View File

@ -250,6 +250,10 @@ Patch1007: ppc64-copysign.patch
Patch1008: nextafterl-ibm-ldouble.patch
# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
Patch1009: ibm-long-double-math.patch
# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
Patch1010: ibm-long-double-frexpl.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch1011: aarch64-setcontext.patch
###
# Patches awaiting upstream approval
@ -264,8 +268,6 @@ Patch2002: ldd-system-interp.patch
Patch2003: abort-no-flush.patch
# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
Patch2004: pthread-mutex-trylock-elision.patch
# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
Patch2005: aarch64-setcontext.patch
# Non-glibc patches
# PATCH-FIX-OPENSUSE Remove debianisms from manpages
@ -476,13 +478,14 @@ rm nscd/s-stamp
%patch1007 -p1
%patch1008 -p1
%patch1009 -p1
%patch1010 -p1
%patch1011 -p1
%patch2000 -p1
%patch2001 -p1
%patch2002 -p1
%patch2003 -p1
%patch2004 -p1
%patch2005 -p1
%patch3000

194
ibm-long-double-frexpl.patch Normal file
View File

@ -0,0 +1,194 @@
2014-04-16 Alan Modra <amodra@gmail.com>
[BZ #16740]
[BZ #16619]
* sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Rewrite.
* math/libm-test.inc (frexp_test_data): Add tests.
Index: glibc-2.19/math/libm-test.inc
===================================================================
--- glibc-2.19.orig/math/libm-test.inc
+++ glibc-2.19/math/libm-test.inc
@@ -8723,6 +8723,15 @@ static const struct test_f_f1_data frexp
TEST_fI_f1 (frexp, 12.8L, 0.8L, 4, NO_INEXACT_EXCEPTION),
TEST_fI_f1 (frexp, -27.34L, -0.854375L, 5, NO_INEXACT_EXCEPTION),
+
+#if defined TEST_LDOUBLE && LDBL_MANT_DIG >= 106
+ TEST_fI_f1 (frexp, 1.0L-0x1p-106L, 1.0L-0x1p-106L, 0, NO_INEXACT_EXCEPTION),
+ TEST_fI_f1 (frexp, 1.0L, 0.5L, 1, NO_INEXACT_EXCEPTION),
+ TEST_fI_f1 (frexp, 1.0L+0x1p-105L, 0.5L+0x1p-106L, 1, NO_INEXACT_EXCEPTION),
+ TEST_fI_f1 (frexp, -1.0L+0x1p-106L, -1.0L+0x1p-106L, 0, NO_INEXACT_EXCEPTION),
+ TEST_fI_f1 (frexp, -1.0L, -0.5L, 1, NO_INEXACT_EXCEPTION),
+ TEST_fI_f1 (frexp, -1.0L-0x1p-105L, -0.5L-0x1p-106L, 1, NO_INEXACT_EXCEPTION),
+#endif
};
static void
Index: glibc-2.19/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
===================================================================
--- glibc-2.19.orig/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
+++ glibc-2.19/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
@@ -31,57 +31,115 @@ static char rcsid[] = "$NetBSD: $";
#include <math_private.h>
#include <math_ldbl_opt.h>
-static const long double
-two107 = 162259276829213363391578010288128.0; /* 0x4670000000000000, 0 */
-
long double __frexpl(long double x, int *eptr)
{
- uint64_t hx, lx, ix, ixl;
- int64_t explo;
- double xhi, xlo;
-
- ldbl_unpack (x, &xhi, &xlo);
- EXTRACT_WORDS64 (hx, xhi);
- EXTRACT_WORDS64 (lx, xlo);
- ixl = 0x7fffffffffffffffULL&lx;
- ix = 0x7fffffffffffffffULL&hx;
- *eptr = 0;
- if(ix>=0x7ff0000000000000ULL||ix==0) return x; /* 0,inf,nan */
- if (ix<0x0010000000000000ULL) { /* subnormal */
- x *= two107;
- xhi = ldbl_high (x);
- EXTRACT_WORDS64 (hx, xhi);
- ix = hx&0x7fffffffffffffffULL;
- *eptr = -107;
+ uint64_t hx, lx, ix, ixl;
+ int64_t explo, expon;
+ double xhi, xlo;
+
+ ldbl_unpack (x, &xhi, &xlo);
+ EXTRACT_WORDS64 (hx, xhi);
+ EXTRACT_WORDS64 (lx, xlo);
+ ixl = 0x7fffffffffffffffULL & lx;
+ ix = 0x7fffffffffffffffULL & hx;
+ expon = 0;
+ if (ix >= 0x7ff0000000000000ULL || ix == 0)
+ {
+ /* 0,inf,nan. */
+ *eptr = expon;
+ return x;
+ }
+ expon = ix >> 52;
+ if (expon == 0)
+ {
+ /* Denormal high double, the low double must be 0.0. */
+ int cnt;
+
+ /* Normalize. */
+ if (sizeof (ix) == sizeof (long))
+ cnt = __builtin_clzl (ix);
+ else if ((ix >> 32) != 0)
+ cnt = __builtin_clzl ((long) (ix >> 32));
+ else
+ cnt = __builtin_clzl ((long) ix) + 32;
+ cnt = cnt - 12;
+ expon -= cnt;
+ ix <<= cnt + 1;
+ }
+ expon -= 1022;
+ ix &= 0x000fffffffffffffULL;
+ hx &= 0x8000000000000000ULL;
+ hx |= (1022LL << 52) | ix;
+
+ if (ixl != 0)
+ {
+ /* If the high double is an exact power of two and the low
+ double has the opposite sign, then the exponent calculated
+ from the high double is one too big. */
+ if (ix == 0
+ && (int64_t) (hx ^ lx) < 0)
+ {
+ hx += 1L << 52;
+ expon -= 1;
+ }
+
+ explo = ixl >> 52;
+ if (explo == 0)
+ {
+ /* The low double started out as a denormal. Normalize its
+ mantissa and adjust the exponent. */
+ int cnt;
+
+ if (sizeof (ixl) == sizeof (long))
+ cnt = __builtin_clzl (ixl);
+ else if ((ixl >> 32) != 0)
+ cnt = __builtin_clzl ((long) (ixl >> 32));
+ else
+ cnt = __builtin_clzl ((long) ixl) + 32;
+ cnt = cnt - 12;
+ explo -= cnt;
+ ixl <<= cnt + 1;
+ }
+
+ /* With variable precision we can't assume much about the
+ magnitude of the returned low double. It may even be a
+ denormal. */
+ explo -= expon;
+ ixl &= 0x000fffffffffffffULL;
+ lx &= 0x8000000000000000ULL;
+ if (explo <= 0)
+ {
+ /* Handle denormal low double. */
+ if (explo > -52)
+ {
+ ixl |= 1LL << 52;
+ ixl >>= 1 - explo;
+ }
+ else
+ {
+ ixl = 0;
+ lx = 0;
+ if ((hx & 0x7ff0000000000000ULL) == (1023LL << 52))
+ {
+ /* Oops, the adjustment we made above for values a
+ little smaller than powers of two turned out to
+ be wrong since the returned low double will be
+ zero. This can happen if the input was
+ something weird like 0x1p1000 - 0x1p-1000. */
+ hx -= 1L << 52;
+ expon += 1;
+ }
+ }
+ explo = 0;
}
- *eptr += (ix>>52)-1022;
+ lx |= (explo << 52) | ixl;
+ }
- if (ixl != 0ULL) {
- explo = (ixl>>52) - (ix>>52) + 0x3fe;
- if ((ixl&0x7ff0000000000000ULL) == 0LL) {
- /* the lower double is a denormal so we need to correct its
- mantissa and perhaps its exponent. */
- int cnt;
-
- if (sizeof (ixl) == sizeof (long))
- cnt = __builtin_clzl (ixl);
- else if ((ixl >> 32) != 0)
- cnt = __builtin_clzl ((long) (ixl >> 32));
- else
- cnt = __builtin_clzl ((long) ixl) + 32;
- cnt = cnt - 12;
- lx = (lx&0x8000000000000000ULL) | ((explo-cnt)<<52)
- | ((ixl<<(cnt+1))&0x000fffffffffffffULL);
- } else
- lx = (lx&0x800fffffffffffffULL) | (explo<<52);
- } else
- lx = 0ULL;
-
- hx = (hx&0x800fffffffffffffULL) | 0x3fe0000000000000ULL;
- INSERT_WORDS64 (xhi, hx);
- INSERT_WORDS64 (xlo, lx);
- x = ldbl_pack (xhi, xlo);
- return x;
+ INSERT_WORDS64 (xhi, hx);
+ INSERT_WORDS64 (xlo, lx);
+ x = ldbl_pack (xhi, xlo);
+ *eptr = expon;
+ return x;
}
#ifdef IS_IN_libm
long_double_symbol (libm, __frexpl, frexpl);