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| author | Ulrich Drepper <drepper@redhat.com> | 2009-04-27 05:31:37 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-04-27 05:31:37 +0000 |
| commit | f0e3c47fd6879b96d9ce712284e8a349092262dd (patch) | |
| tree | f26027586e7a72165b1939cb07df890892b367cd /sysdeps | |
| parent | 49768bb93e4960a814563ee30213eaf36e6dcb48 (diff) | |
| download | glibc-f0e3c47fd6879b96d9ce712284e8a349092262dd.zip glibc-f0e3c47fd6879b96d9ce712284e8a349092262dd.tar.gz glibc-f0e3c47fd6879b96d9ce712284e8a349092262dd.tar.bz2 | |
* sysdeps/ieee754/dbl-64/s_expm1.c: Set errno for overflow.
* sysdeps/ieee754/flt-32/s_expm1f.c: Likewise.
* sysdeps/x86_64/fpu/s_expm1l.S: Likewise.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_expm1.c | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_expm1f.c | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/s_expm1l.S | 6 |
3 files changed, 13 insertions, 5 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_expm1.c b/sysdeps/ieee754/dbl-64/s_expm1.c index bfd15b2..3243543 100644 --- a/sysdeps/ieee754/dbl-64/s_expm1.c +++ b/sysdeps/ieee754/dbl-64/s_expm1.c @@ -112,6 +112,7 @@ static char rcsid[] = "$NetBSD: s_expm1.c,v 1.8 1995/05/10 20:47:09 jtc Exp $"; * to produce the hexadecimal values shown. */ +#include <errno.h> #include "math.h" #include "math_private.h" #define one Q[0] @@ -159,7 +160,10 @@ Q[] = {1.0, -3.33333333333331316428e-02, /* BFA11111 111110F4 */ return x+x; /* NaN */ else return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */ } - if(x > o_threshold) return huge*huge; /* overflow */ + if(x > o_threshold) { + __set_errno (ERANGE); + return huge*huge; /* overflow */ + } } if(xsb!=0) { /* x < -56*ln2, return -1.0 with inexact */ if(x+tiny<0.0) /* raise inexact */ diff --git a/sysdeps/ieee754/flt-32/s_expm1f.c b/sysdeps/ieee754/flt-32/s_expm1f.c index 1f032be..3f4536b 100644 --- a/sysdeps/ieee754/flt-32/s_expm1f.c +++ b/sysdeps/ieee754/flt-32/s_expm1f.c @@ -17,6 +17,7 @@ static char rcsid[] = "$NetBSD: s_expm1f.c,v 1.5 1995/05/10 20:47:11 jtc Exp $"; #endif +#include <errno.h> #include "math.h" #include "math_private.h" @@ -63,7 +64,10 @@ Q5 = -2.0109921195e-07; /* 0xb457edbb */ return x+x; /* NaN */ if(hx==0x7f800000) return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */ - if(x > o_threshold) return huge*huge; /* overflow */ + if(x > o_threshold) { + __set_errno (ERANGE); + return huge*huge; /* overflow */ + } } if(xsb!=0) { /* x < -27*ln2, return -1.0 with inexact */ if(x+tiny<(float)0.0) /* raise inexact */ diff --git a/sysdeps/x86_64/fpu/s_expm1l.S b/sysdeps/x86_64/fpu/s_expm1l.S index 05a1bfc..c0b93e9 100644 --- a/sysdeps/x86_64/fpu/s_expm1l.S +++ b/sysdeps/x86_64/fpu/s_expm1l.S @@ -1,5 +1,5 @@ /* ix87 specific implementation of exp(x)-1. - Copyright (C) 1996, 1997, 2001, 2002, 2008 Free Software Foundation, Inc. + Copyright (C) 1996,1997,2001,2002,2008,2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. Based on code by John C. Bowman <bowman@ipp-garching.mpg.de>. @@ -51,7 +51,7 @@ ENTRY(__expm1l) movzwl 8+8(%rsp), %eax // load sign bit and 15-bit exponent xorb $0x80, %ah // invert sign bit (now 1 is "positive") cmpl $0xc006, %eax // is num positive and exp >= 6 (number is >= 128.0)? - jae __ieee754_expl // (if num is denormal, it is at least >= 64.0) + jae __expl // (if num is denormal, it is at least >= 64.0) fldt 8(%rsp) // x fxam // Is NaN or +-Inf? @@ -76,7 +76,7 @@ ENTRY(__expm1l) fscale // 2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x) fsubrl MO(one) // 1-2^int(log2(e)*x) : int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x) fstp %st(1) // 1-2^int(log2(e)*x) : 2^(log2(e)*x)-2^int(log2(e)*x) - fsubrp %st, %st(1) // 2^(log2(e)*x) + fsubrp %st, %st(1) // 2^(log2(e)*x)-1 ret 2: testl $0x200, %eax // Test sign. |