diff options
Diffstat (limited to 'sysdeps/i386/fpu/e_log2l.S')
| -rw-r--r-- | sysdeps/i386/fpu/e_log2l.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/i386/fpu/e_log2l.S b/sysdeps/i386/fpu/e_log2l.S index bd51b5651e..0f5f7e5789 100644 --- a/sysdeps/i386/fpu/e_log2l.S +++ b/sysdeps/i386/fpu/e_log2l.S @@ -47,7 +47,13 @@ ENTRY(__ieee754_log2l) fnstsw // x-1 : x : 1 andb $0x45, %ah jz 2f - fstp %st(1) // x-1 : 1 + fxam + fnstsw + andb $0x45, %ah + cmpb $0x40, %ah + jne 5f + fabs // log2(1) is +0 in all rounding modes. +5: fstp %st(1) // x-1 : 1 fyl2xp1 // log(x) ret |