diff options
Diffstat (limited to 'src/math/x86_64/exp2l.s')
| -rw-r--r-- | src/math/x86_64/exp2l.s | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/math/x86_64/exp2l.s b/src/math/x86_64/exp2l.s index e7145881..0d6cd563 100644 --- a/src/math/x86_64/exp2l.s +++ b/src/math/x86_64/exp2l.s @@ -4,8 +4,18 @@ expm1l: fldt 8(%rsp) fldl2e fmulp + movl $0xc2820000,-4(%rsp) + flds -4(%rsp) + fucomp %st(1) + fnstsw %ax + sahf fld1 - fld %st(1) + jb 1f + # x*log2e <= -65, return -1 without underflow + fstp %st(1) + fchs + ret +1: fld %st(1) fabs fucom %st(1) fnstsw %ax |