about summary refs log tree commit diff
path: root/sysdeps/x86_64/fpu/libm-test-ulps
diff options
context:
space:
mode:
authorJoseph Myers <joseph@codesourcery.com>2014-06-25 11:33:22 +0000
committerJoseph Myers <joseph@codesourcery.com>2014-06-25 11:33:22 +0000
commita638de828d877376fb238efc8b0bc9220dd2601e (patch)
treedd366ccb27ca5aaeea9ba0e5406b50da9432b9f9 /sysdeps/x86_64/fpu/libm-test-ulps
parent0f5b71850e7ae2a4fefade72c73556166d52bc93 (diff)
downloadglibc-a638de828d877376fb238efc8b0bc9220dd2601e.tar.gz
glibc-a638de828d877376fb238efc8b0bc9220dd2601e.tar.xz
glibc-a638de828d877376fb238efc8b0bc9220dd2601e.zip
Fix exp10 spurious underflows (bug 16560).
This patch fixes spurious underflows from exp10 for arguments near 0
(part of bug 16560; that bug also includes spurious underflows from
exp2, which are not fixed by this patch).  The problem is underflows
in the internal computation converting the exp10 argument to arguments
for exp (with extra precision), and the fix is simply to return 1
early for arguments near enough to 0 (just as arguments with large
enough magnitude have their own overflow / underflow logic at the
start of the function).

Tested x86_64 and x86 and ulps updated accordingly; also tested for
powerpc32 and mips64 to validate the ldbl-128ibm and ldbl-128 changes.

	[BZ #16560]
	* sysdeps/ieee754/dbl-64/e_exp10.c (__ieee754_exp10): Return 1 for
	arguments close to 0.
	* sysdeps/ieee754/ldbl-128/e_exp10l.c (__ieee754_exp10l):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_exp10l.c (__ieee754_exp10l):
	Likewise.
	* math/auto-libm-test-in: Add more tests of exp10.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/x86_64/fpu/libm-test-ulps: Update.
Diffstat (limited to 'sysdeps/x86_64/fpu/libm-test-ulps')
-rw-r--r--sysdeps/x86_64/fpu/libm-test-ulps8
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index 5469887099..f68650d36d 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -1407,7 +1407,9 @@ ldouble: 1
 
 Function: "exp10_downward":
 double: 1
+float: 1
 idouble: 1
+ifloat: 1
 ildouble: 2
 ldouble: 2
 
@@ -1419,7 +1421,9 @@ ldouble: 1
 
 Function: "exp10_towardzero":
 double: 1
+float: 1
 idouble: 1
+ifloat: 1
 ildouble: 1
 ldouble: 1
 
@@ -1765,13 +1769,17 @@ ldouble: 1
 
 Function: "pow10_downward":
 double: 1
+float: 1
 idouble: 1
+ifloat: 1
 ildouble: 2
 ldouble: 2
 
 Function: "pow10_towardzero":
 double: 1
+float: 1
 idouble: 1
+ifloat: 1
 ildouble: 1
 ldouble: 1