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* sysdeps/ieee754/dbl-64/s_expm1.c: Set errno for overflow.

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* sysdeps/ieee754/flt-32/s_expm1f.c: Likewise.
	* sysdeps/x86_64/fpu/s_expm1l.S: Likewise.
This commit is contained in:
Ulrich Drepper 2009-04-27 05:31:37 +00:00
parent 49768bb93e
commit f0e3c47fd6
4 changed files with 17 additions and 5 deletions
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4
ChangeLog
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@ -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.

6
sysdeps/ieee754/dbl-64/s_expm1.c
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@ -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 */

6
sysdeps/ieee754/flt-32/s_expm1f.c
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@ -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 */

6
sysdeps/x86_64/fpu/s_expm1l.S
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@ -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.