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authorUlrich Drepper <drepper@redhat.com>2009-04-27 05:31:37 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-27 05:31:37 +0000
commitf0e3c47fd6879b96d9ce712284e8a349092262dd (patch)
treef26027586e7a72165b1939cb07df890892b367cd
parent49768bb93e4960a814563ee30213eaf36e6dcb48 (diff)
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* 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.
-rw-r--r--ChangeLog4
-rw-r--r--sysdeps/ieee754/dbl-64/s_expm1.c6
-rw-r--r--sysdeps/ieee754/flt-32/s_expm1f.c6
-rw-r--r--sysdeps/x86_64/fpu/s_expm1l.S6
4 files changed, 17 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog
index 10a28da..6261480 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
2009-04-26 Ulrich Drepper <drepper@redhat.com>
+ * 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.
+
* sysdeps/ieee754/k_standard.c (__kernel_standard): Pole errors in
atanh should set ERANGE.
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.