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| author | Joseph Myers <joseph@codesourcery.com> | 2012-03-28 14:57:58 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-03-28 14:57:58 +0000 |
| commit | d6270972f79fe89a96fa7a3909991dad2e317033 (patch) | |
| tree | 18ed157e89359cf8711d641916028dab73e37449 /sysdeps/i386/fpu/e_powf.S | |
| parent | 414fca039edfece0dc9bfc266730e390124687de (diff) | |
| download | glibc-d6270972f79fe89a96fa7a3909991dad2e317033.tar.gz glibc-d6270972f79fe89a96fa7a3909991dad2e317033.tar.xz glibc-d6270972f79fe89a96fa7a3909991dad2e317033.zip | |
Fix pow of negative numbers to integer exponents (bugs 369, 2678, 3866).
Diffstat (limited to 'sysdeps/i386/fpu/e_powf.S')
| -rw-r--r-- | sysdeps/i386/fpu/e_powf.S | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sysdeps/i386/fpu/e_powf.S b/sysdeps/i386/fpu/e_powf.S index aa58ed2b67..529a96f953 100644 --- a/sysdeps/i386/fpu/e_powf.S +++ b/sysdeps/i386/fpu/e_powf.S @@ -114,7 +114,7 @@ ENTRY(__ieee754_powf) fucomp %st(1) // y : x fnstsw sahf - jne 2f + jne 3f /* OK, we have an integer value for y. */ popl %edx @@ -151,7 +151,12 @@ ENTRY(__ieee754_powf) cfi_adjust_cfa_offset (4) .align ALIGNARG(4) -2: /* y is a real number. */ +2: /* y is a large integer (so even). */ + fxch // x : y + fabs // |x| : y + fxch // y : x + .align ALIGNARG(4) +3: /* y is a real number. */ fxch // x : y fldl MO(one) // 1.0 : x : y fldl MO(limit) // 0.29 : 1.0 : x : y |