forked from pool/glibc
Accepting request 230484 from home:Andreas_Schwab:Factory
- 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:
Git OBS Bridge
parent
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commit
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@ -1,3 +1,9 @@
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-------------------------------------------------------------------
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Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
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- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
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(bnc#872573, BZ #16740, BZ #16619)
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-------------------------------------------------------------------
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Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de
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@ -250,6 +250,10 @@ Patch1007: ppc64-copysign.patch
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Patch1008: nextafterl-ibm-ldouble.patch
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# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
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Patch1009: ibm-long-double-math.patch
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# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
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Patch1010: ibm-long-double-frexpl.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch1011: aarch64-setcontext.patch
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###
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# Patches awaiting upstream approval
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@ -264,8 +268,6 @@ Patch2002: ldd-system-interp.patch
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Patch2003: abort-no-flush.patch
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# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
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Patch2004: pthread-mutex-trylock-elision.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch2005: aarch64-setcontext.patch
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# Non-glibc patches
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# PATCH-FIX-OPENSUSE Remove debianisms from manpages
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@ -476,13 +478,14 @@ rm nscd/s-stamp
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%patch1007 -p1
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%patch1008 -p1
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%patch1009 -p1
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%patch1010 -p1
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%patch1011 -p1
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%patch2000 -p1
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%patch2001 -p1
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%patch2002 -p1
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%patch2003 -p1
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%patch2004 -p1
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%patch2005 -p1
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%patch3000
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@ -1,3 +1,9 @@
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-------------------------------------------------------------------
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Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
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- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
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(bnc#872573, BZ #16740, BZ #16619)
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-------------------------------------------------------------------
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Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de
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@ -249,6 +249,10 @@ Patch1007: ppc64-copysign.patch
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Patch1008: nextafterl-ibm-ldouble.patch
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# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
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Patch1009: ibm-long-double-math.patch
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# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
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Patch1010: ibm-long-double-frexpl.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch1011: aarch64-setcontext.patch
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###
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# Patches awaiting upstream approval
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@ -263,8 +267,6 @@ Patch2002: ldd-system-interp.patch
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Patch2003: abort-no-flush.patch
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# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
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Patch2004: pthread-mutex-trylock-elision.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch2005: aarch64-setcontext.patch
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# Non-glibc patches
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# PATCH-FIX-OPENSUSE Remove debianisms from manpages
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@ -476,13 +478,14 @@ rm nscd/s-stamp
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%patch1007 -p1
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%patch1008 -p1
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%patch1009 -p1
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%patch1010 -p1
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%patch1011 -p1
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%patch2000 -p1
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%patch2001 -p1
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%patch2002 -p1
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%patch2003 -p1
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%patch2004 -p1
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%patch2005 -p1
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%patch3000
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@ -1,3 +1,9 @@
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-------------------------------------------------------------------
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Thu Apr 17 09:13:32 UTC 2014 - schwab@suse.de
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- ibm-long-double-frexpl.patch: Correct IBM long double frexpl
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(bnc#872573, BZ #16740, BZ #16619)
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-------------------------------------------------------------------
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Tue Apr 15 14:23:54 UTC 2014 - schwab@suse.de
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@ -250,6 +250,10 @@ Patch1007: ppc64-copysign.patch
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Patch1008: nextafterl-ibm-ldouble.patch
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# PATCH-FIX-UPSTREAM Remove faulty assembler implementations for IBM long double (BZ #16701, BZ #16706, BZ #16707)
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Patch1009: ibm-long-double-math.patch
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# PATCH-FIX-UPSTREAM Correct IBM long double frexpl (BZ #16740, BZ #16619)
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Patch1010: ibm-long-double-frexpl.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch1011: aarch64-setcontext.patch
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###
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# Patches awaiting upstream approval
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@ -264,8 +268,6 @@ Patch2002: ldd-system-interp.patch
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Patch2003: abort-no-flush.patch
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# PATCH-FIX-UPSTREAM Properly handle forced elision in pthread_mutex_trylock (BZ #16657)
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Patch2004: pthread-mutex-trylock-elision.patch
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# PATCH-FIX-UPSTREAM Fix aarch64 setcontext clobbering alternate signal stack (BZ #16629)
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Patch2005: aarch64-setcontext.patch
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# Non-glibc patches
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# PATCH-FIX-OPENSUSE Remove debianisms from manpages
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@ -476,13 +478,14 @@ rm nscd/s-stamp
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%patch1007 -p1
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%patch1008 -p1
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%patch1009 -p1
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%patch1010 -p1
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%patch1011 -p1
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%patch2000 -p1
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%patch2001 -p1
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%patch2002 -p1
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%patch2003 -p1
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%patch2004 -p1
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%patch2005 -p1
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%patch3000
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194
ibm-long-double-frexpl.patch
Normal file
194
ibm-long-double-frexpl.patch
Normal file
@ -0,0 +1,194 @@
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2014-04-16 Alan Modra <amodra@gmail.com>
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[BZ #16740]
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[BZ #16619]
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* sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Rewrite.
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* math/libm-test.inc (frexp_test_data): Add tests.
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Index: glibc-2.19/math/libm-test.inc
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===================================================================
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--- glibc-2.19.orig/math/libm-test.inc
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+++ glibc-2.19/math/libm-test.inc
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@@ -8723,6 +8723,15 @@ static const struct test_f_f1_data frexp
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TEST_fI_f1 (frexp, 12.8L, 0.8L, 4, NO_INEXACT_EXCEPTION),
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TEST_fI_f1 (frexp, -27.34L, -0.854375L, 5, NO_INEXACT_EXCEPTION),
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+
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+#if defined TEST_LDOUBLE && LDBL_MANT_DIG >= 106
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+ TEST_fI_f1 (frexp, 1.0L-0x1p-106L, 1.0L-0x1p-106L, 0, NO_INEXACT_EXCEPTION),
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+ TEST_fI_f1 (frexp, 1.0L, 0.5L, 1, NO_INEXACT_EXCEPTION),
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+ TEST_fI_f1 (frexp, 1.0L+0x1p-105L, 0.5L+0x1p-106L, 1, NO_INEXACT_EXCEPTION),
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+ TEST_fI_f1 (frexp, -1.0L+0x1p-106L, -1.0L+0x1p-106L, 0, NO_INEXACT_EXCEPTION),
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+ TEST_fI_f1 (frexp, -1.0L, -0.5L, 1, NO_INEXACT_EXCEPTION),
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+ TEST_fI_f1 (frexp, -1.0L-0x1p-105L, -0.5L-0x1p-106L, 1, NO_INEXACT_EXCEPTION),
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+#endif
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};
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static void
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Index: glibc-2.19/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
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===================================================================
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--- glibc-2.19.orig/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
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+++ glibc-2.19/sysdeps/ieee754/ldbl-128ibm/s_frexpl.c
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@@ -31,57 +31,115 @@ static char rcsid[] = "$NetBSD: $";
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#include <math_private.h>
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#include <math_ldbl_opt.h>
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-static const long double
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-two107 = 162259276829213363391578010288128.0; /* 0x4670000000000000, 0 */
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-
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long double __frexpl(long double x, int *eptr)
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{
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- uint64_t hx, lx, ix, ixl;
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- int64_t explo;
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- double xhi, xlo;
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-
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- ldbl_unpack (x, &xhi, &xlo);
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- EXTRACT_WORDS64 (hx, xhi);
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- EXTRACT_WORDS64 (lx, xlo);
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- ixl = 0x7fffffffffffffffULL&lx;
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- ix = 0x7fffffffffffffffULL&hx;
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- *eptr = 0;
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- if(ix>=0x7ff0000000000000ULL||ix==0) return x; /* 0,inf,nan */
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- if (ix<0x0010000000000000ULL) { /* subnormal */
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- x *= two107;
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- xhi = ldbl_high (x);
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- EXTRACT_WORDS64 (hx, xhi);
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- ix = hx&0x7fffffffffffffffULL;
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- *eptr = -107;
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+ uint64_t hx, lx, ix, ixl;
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+ int64_t explo, expon;
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+ double xhi, xlo;
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+
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+ ldbl_unpack (x, &xhi, &xlo);
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+ EXTRACT_WORDS64 (hx, xhi);
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+ EXTRACT_WORDS64 (lx, xlo);
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+ ixl = 0x7fffffffffffffffULL & lx;
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+ ix = 0x7fffffffffffffffULL & hx;
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+ expon = 0;
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+ if (ix >= 0x7ff0000000000000ULL || ix == 0)
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+ {
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+ /* 0,inf,nan. */
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+ *eptr = expon;
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+ return x;
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+ }
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+ expon = ix >> 52;
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+ if (expon == 0)
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+ {
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+ /* Denormal high double, the low double must be 0.0. */
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+ int cnt;
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+
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+ /* Normalize. */
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+ if (sizeof (ix) == sizeof (long))
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+ cnt = __builtin_clzl (ix);
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+ else if ((ix >> 32) != 0)
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+ cnt = __builtin_clzl ((long) (ix >> 32));
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+ else
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+ cnt = __builtin_clzl ((long) ix) + 32;
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+ cnt = cnt - 12;
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+ expon -= cnt;
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+ ix <<= cnt + 1;
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+ }
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+ expon -= 1022;
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+ ix &= 0x000fffffffffffffULL;
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+ hx &= 0x8000000000000000ULL;
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+ hx |= (1022LL << 52) | ix;
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+
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+ if (ixl != 0)
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+ {
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+ /* If the high double is an exact power of two and the low
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+ double has the opposite sign, then the exponent calculated
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+ from the high double is one too big. */
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+ if (ix == 0
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+ && (int64_t) (hx ^ lx) < 0)
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+ {
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+ hx += 1L << 52;
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+ expon -= 1;
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+ }
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+
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+ explo = ixl >> 52;
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+ if (explo == 0)
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+ {
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+ /* The low double started out as a denormal. Normalize its
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+ mantissa and adjust the exponent. */
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+ int cnt;
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+
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+ if (sizeof (ixl) == sizeof (long))
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+ cnt = __builtin_clzl (ixl);
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+ else if ((ixl >> 32) != 0)
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+ cnt = __builtin_clzl ((long) (ixl >> 32));
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+ else
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+ cnt = __builtin_clzl ((long) ixl) + 32;
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+ cnt = cnt - 12;
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+ explo -= cnt;
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+ ixl <<= cnt + 1;
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+ }
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+
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+ /* With variable precision we can't assume much about the
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+ magnitude of the returned low double. It may even be a
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+ denormal. */
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+ explo -= expon;
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+ ixl &= 0x000fffffffffffffULL;
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+ lx &= 0x8000000000000000ULL;
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+ if (explo <= 0)
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+ {
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+ /* Handle denormal low double. */
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+ if (explo > -52)
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+ {
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+ ixl |= 1LL << 52;
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+ ixl >>= 1 - explo;
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+ }
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+ else
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+ {
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+ ixl = 0;
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+ lx = 0;
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+ if ((hx & 0x7ff0000000000000ULL) == (1023LL << 52))
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+ {
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+ /* Oops, the adjustment we made above for values a
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+ little smaller than powers of two turned out to
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+ be wrong since the returned low double will be
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+ zero. This can happen if the input was
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+ something weird like 0x1p1000 - 0x1p-1000. */
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+ hx -= 1L << 52;
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+ expon += 1;
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+ }
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+ }
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+ explo = 0;
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}
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- *eptr += (ix>>52)-1022;
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+ lx |= (explo << 52) | ixl;
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+ }
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- if (ixl != 0ULL) {
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- explo = (ixl>>52) - (ix>>52) + 0x3fe;
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- if ((ixl&0x7ff0000000000000ULL) == 0LL) {
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- /* the lower double is a denormal so we need to correct its
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- mantissa and perhaps its exponent. */
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- int cnt;
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-
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- if (sizeof (ixl) == sizeof (long))
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- cnt = __builtin_clzl (ixl);
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- else if ((ixl >> 32) != 0)
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- cnt = __builtin_clzl ((long) (ixl >> 32));
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- else
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- cnt = __builtin_clzl ((long) ixl) + 32;
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- cnt = cnt - 12;
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- lx = (lx&0x8000000000000000ULL) | ((explo-cnt)<<52)
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- | ((ixl<<(cnt+1))&0x000fffffffffffffULL);
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- } else
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- lx = (lx&0x800fffffffffffffULL) | (explo<<52);
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- } else
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- lx = 0ULL;
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-
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- hx = (hx&0x800fffffffffffffULL) | 0x3fe0000000000000ULL;
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- INSERT_WORDS64 (xhi, hx);
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- INSERT_WORDS64 (xlo, lx);
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- x = ldbl_pack (xhi, xlo);
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- return x;
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+ INSERT_WORDS64 (xhi, hx);
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+ INSERT_WORDS64 (xlo, lx);
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+ x = ldbl_pack (xhi, xlo);
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+ *eptr = expon;
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+ return x;
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}
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#ifdef IS_IN_libm
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long_double_symbol (libm, __frexpl, frexpl);
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Block a user