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Fix dbl-64 e_sqrt.c for non-default rounding modes (bug 16271).

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This commit is contained in:
Joseph Myers 2013-11-28 16:50:38 +00:00
parent 5a4c6d53f5
commit 3c1c46a64a
31 changed files with 110 additions and 5 deletions
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17
ChangeLog
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@ -1,3 +1,20 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
[BZ #16271]
* sysdeps/ieee754/dbl-64/e_sqrt.c (__ieee754_sqrt): Set
round-to-nearest then adjust result for other rounding modes.
* include/fenv.h (fegetround): Use libm_hidden_proto.
* math/fegetround.c (fegetround): Use libm_hidden_def.
* sysdeps/i386/fpu/fegetround.c (fegetround): Likewise.
* sysdeps/powerpc/fpu/fegetround.c (fegetround): Likewise.
* sysdeps/powerpc/nofpu/fegetround.c (fegetround): Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/fegetround.c (fegetround):
Likewise.
* sysdeps/s390/fpu/fegetround.c (fegetround): Likewise.
* sysdeps/sh/sh4/fpu/fegetround.c (fegetround): Likewise.
* sysdeps/sparc/fpu/fegetround.c (fegetround): Likewise.
* sysdeps/x86_64/fpu/fegetround.c (fegetround): Likewise.
2013-11-28 Siddhesh Poyarekar <siddhesh@redhat.com>
[BZ #16077]

2
NEWS
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@ -19,7 +19,7 @@ Version 2.19
15897, 15905, 15909, 15917, 15919, 15921, 15923, 15939, 15948, 15963,
15966, 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16041, 16055,
16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144, 16146,
16150, 16151, 16153, 16167, 16172, 16245.
16150, 16151, 16153, 16167, 16172, 16245, 16271.
* The public headers no longer use __unused nor __block. This change is to
support compiling programs that are derived from BSD sources and use

1
include/fenv.h
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@ -16,6 +16,7 @@ extern int __feupdateenv (const fenv_t *__envp);
libm_hidden_proto (feraiseexcept)
libm_hidden_proto (fegetenv)
libm_hidden_proto (fegetround)
libm_hidden_proto (fesetenv)
libm_hidden_proto (fesetround)
libm_hidden_proto (feholdexcept)

1
math/fegetround.c
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@ -28,4 +28,5 @@ fegetround (void)
return 0;
#endif
}
libm_hidden_def (fegetround)
stub_warning (fegetround)

5
ports/ChangeLog.aarch64
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@ -1,3 +1,8 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/aarch64/fpu/fegetround.c (fegetround): Use
libm_hidden_def.
2013-11-26 Will Newton <will.newton@linaro.org>
* sysdeps/aarch64/dl-irel.h: Include ldsodefs.h.

5
ports/ChangeLog.alpha
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@ -1,3 +1,8 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/alpha/fpu/fegetround.c (fegetround): Use
libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Use __glibc_reserved instead __unused.
* sysdeps/unix/sysv/linux/alpha/bits/msq.h: Likewise.

4
ports/ChangeLog.am33
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/am33/fpu/fegetround.c (fegetround): Use libm_hidden_def.
2013-10-30 Mike Frysinger <vapier@gentoo.org>
* sysdeps/unix/sysv/linux/am33/configure.in: Moved to ...

4
ports/ChangeLog.arm
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/arm/fegetround.c (fegetround): Use libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/arm/bits/shm.h: Use __glibc_reserved instead __unused.

4
ports/ChangeLog.hppa
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/hppa/fpu/fegetround.c (fegetround): Use libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/hppa/bits/ipc.h: Use __glibc_reserved instead __unused.
* sysdeps/unix/sysv/linux/hppa/bits/msq.h: Likewise.

4
ports/ChangeLog.ia64
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/ia64/fpu/fegetround.c (fegetround): Use libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/ia64/bits/ipc.h: Use __glibc_reserved instead __unused.
* sysdeps/unix/sysv/linux/ia64/bits/msq.h: Likewise.

4
ports/ChangeLog.m68k
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/m68k/fpu/fegetround.c (fegetround): Use libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/m68k/bits/stat.h: Use __glibc_reserved instead __unused.

5
ports/ChangeLog.microblaze
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@ -1,3 +1,8 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/microblaze/fegetround.c (fegetround): Use
libm_hidden_def.
2013-11-26 Ondřej Bílka <neleai@seznam.cz>
* sysdeps/unix/sysv/linux/microblaze/bits/stat.h: Use __glibc_reserved instead __unused.
* sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Likewise.

4
ports/ChangeLog.mips
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@ -1,3 +1,7 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/mips/fpu/fegetround.c (fegetround): Use libm_hidden_def.
2013-11-27 Aurelien Jarno <aurelien@aurel32.net>
* sysdeps/unix/sysv/linux/mips/bits/resource.h (RLIM64_INFINITY): Fix

1
ports/sysdeps/aarch64/fpu/fegetround.c
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@ -26,3 +26,4 @@ fegetround (void)
_FPU_GETCW (fpcr);
return fpcr & FE_TOWARDZERO;
}
libm_hidden_def (fegetround)

1
ports/sysdeps/alpha/fpu/fegetround.c
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@ -28,3 +28,4 @@ fegetround (void)
return (fpcr >> FPCR_ROUND_SHIFT) & 3;
}
libm_hidden_def (fegetround)

1
ports/sysdeps/am33/fpu/fegetround.c
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@ -32,3 +32,4 @@ fegetround (void)
return (cw & ROUND_MASK);
}
libm_hidden_def (fegetround)

1
ports/sysdeps/arm/fegetround.c
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@ -37,3 +37,4 @@ fegetround (void)
/* The current soft-float implementation only handles TONEAREST. */
return FE_TONEAREST;
}
libm_hidden_def (fegetround)

1
ports/sysdeps/hppa/fpu/fegetround.c
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@ -24,3 +24,4 @@ fegetround (void)
{
return get_rounding_mode ();
}
libm_hidden_def (fegetround)

1
ports/sysdeps/ia64/fpu/fegetround.c
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@ -24,3 +24,4 @@ fegetround (void)
{
return get_rounding_mode ();
}
libm_hidden_def (fegetround)

1
ports/sysdeps/m68k/fpu/fegetround.c
View File

@ -28,3 +28,4 @@ fegetround (void)
return fpcr & FE_UPWARD;
}
libm_hidden_def (fegetround)

1
ports/sysdeps/microblaze/fegetround.c
View File

@ -22,3 +22,4 @@ fegetround (void)
{
return FE_TONEAREST;
}
libm_hidden_def (fegetround)

1
ports/sysdeps/mips/fpu/fegetround.c
View File

@ -30,3 +30,4 @@ fegetround (void)
return cw & _FPU_RC_MASK;
}
libm_hidden_def (fegetround)

1
sysdeps/i386/fpu/fegetround.c
View File

@ -28,3 +28,4 @@ fegetround (void)
return cw & 0xc00;
}
libm_hidden_def (fegetround)

38
sysdeps/ieee754/dbl-64/e_sqrt.c
View File

@ -66,8 +66,9 @@ __ieee754_sqrt (double x)
/*----------------- 2^-1022 <= | x |< 2^1024 -----------------*/
if (k > 0x000fffff && k < 0x7ff00000)
{
int rm = fegetround ();
fenv_t env;
libc_feholdexcept (&env);
libc_feholdexcept_setround (&env, FE_TONEAREST);
double ret;
y = 1.0 - t * (t * s);
t = t * (rt0 + y * (rt1 + y * (rt2 + y * rt3)));
@ -82,15 +83,44 @@ __ieee754_sqrt (double x)
{
res1 = res + 1.5 * ((y - res) + del);
EMULV (res, res1, z, zz, p, hx, tx, hy, ty); /* (z+zz)=res*res1 */
ret = ((((z - s) + zz) < 0) ? max (res, res1) :
min (res, res1)) * c.x;
res = ((((z - s) + zz) < 0) ? max (res, res1) :
min (res, res1));
ret = res * c.x;
}
math_force_eval (ret);
libc_fesetenv (&env);
if (x / ret != ret)
double dret = x / ret;
if (dret != ret)
{
double force_inexact = 1.0 / 3.0;
math_force_eval (force_inexact);
/* The square root is inexact, ret is the round-to-nearest
value which may need adjusting for other rounding
modes. */
switch (rm)
{
#ifdef FE_UPWARD
case FE_UPWARD:
if (dret > ret)
ret = (res + 0x1p-1022) * c.x;
break;
#endif
#ifdef FE_DOWNWARD
case FE_DOWNWARD:
#endif
#ifdef FE_TOWARDZERO
case FE_TOWARDZERO:
#endif
#if defined FE_DOWNWARD || defined FE_TOWARDZERO
if (dret < ret)
ret = (res - 0x1p-1022) * c.x;
break;
#endif
default:
break;
}
}
/* Otherwise (x / ret == ret), either the square root was exact or
the division was inexact. */

1
sysdeps/powerpc/fpu/fegetround.c
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@ -24,3 +24,4 @@ fegetround (void)
{
return __fegetround();
}
libm_hidden_def (fegetround)

1
sysdeps/powerpc/nofpu/fegetround.c
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@ -26,3 +26,4 @@ fegetround (void)
{
return __sim_round_mode_thread;
}
libm_hidden_def (fegetround)

1
sysdeps/powerpc/powerpc32/e500/nofpu/fegetround.c
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@ -27,3 +27,4 @@ fegetround (void)
fpescr = fegetenv_register ();
return fpescr & 3;
}
libm_hidden_def (fegetround)

1
sysdeps/s390/fpu/fegetround.c
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@ -29,3 +29,4 @@ fegetround (void)
return cw & FPC_RM_MASK;
}
libm_hidden_def (fegetround)

1
sysdeps/sh/sh4/fpu/fegetround.c
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@ -30,3 +30,4 @@ fegetround (void)
return cw & 0x1;
}
libm_hidden_def (fegetround)

1
sysdeps/sparc/fpu/fegetround.c
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@ -27,3 +27,4 @@ fegetround (void)
return tmp & __FE_ROUND_MASK;
}
libm_hidden_def (fegetround)

1
sysdeps/x86_64/fpu/fegetround.c
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@ -30,3 +30,4 @@ fegetround (void)
return cw & 0xc00;
}
libm_hidden_def (fegetround)