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| author | Ulrich Drepper <drepper@redhat.com> | 2007-03-15 20:10:51 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-03-15 20:10:51 +0000 |
| commit | 6b2665f534dd34c20f31dc6e3540114762a8d3a8 (patch) | |
| tree | e32593b105af2dea5c2397b7527f0e0348656b95 /sysdeps/x86_64/fpu/e_logl.S | |
| parent | 44969f17bb8e323ab66799f73a05d23a5a2cf83a (diff) | |
| download | glibc-6b2665f534dd34c20f31dc6e3540114762a8d3a8.tar.gz glibc-6b2665f534dd34c20f31dc6e3540114762a8d3a8.tar.xz glibc-6b2665f534dd34c20f31dc6e3540114762a8d3a8.zip | |
[BZ #3919]
* math/libm-test.inc (log_test): Test -Inf and NaN. (log10_test, log1p_test, log2_test): Test -Inf. * sysdeps/i386/fpu/e_log.S (__ieee754_log): Don't raise FE_INVALID when argument is qNaN. * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/i386/fpu/e_logf.S (__ieee754_logf): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_log10l.S (__ieee754_log10l): Replace andb $1, %ah with testb $1, %ah, don't test for parity, instead testb $4, %ah and jump if non-zero. * sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise. * sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Likewise. 2007-03-15 Jakub Jelinek <jakub@redhat.com>
Diffstat (limited to 'sysdeps/x86_64/fpu/e_logl.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_logl.S | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/e_logl.S b/sysdeps/x86_64/fpu/e_logl.S index a0bed663c8..2ba91eedfd 100644 --- a/sysdeps/x86_64/fpu/e_logl.S +++ b/sysdeps/x86_64/fpu/e_logl.S @@ -38,8 +38,12 @@ limit: .double 0.29 ENTRY(__ieee754_logl) fldln2 // log(2) fldt 8(%rsp) // x : log(2) + fxam + fnstsw fld %st // x : x : log(2) - fsubl MO(one) // x-1 : x : log(2) + testb $1, %ah + jnz 3f // in case x is NaN or +-Inf +4: fsubl MO(one) // x-1 : x : log(2) fld %st // x-1 : x-1 : x : log(2) fabs // |x-1| : x-1 : x : log(2) fcompl MO(limit) // x-1 : x : log(2) @@ -53,4 +57,10 @@ ENTRY(__ieee754_logl) 2: fstp %st(0) // x : log(2) fyl2x // log(x) ret + +3: testb $4, %ah + jnz 4b // in case x is +-Inf + fstp %st(1) + fstp %st(1) + ret END (__ieee754_logl) |