diff options
Diffstat (limited to 'src/math/i386/asin.s')
| -rw-r--r-- | src/math/i386/asin.s | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/math/i386/asin.s b/src/math/i386/asin.s index 932c7542..a9f691bf 100644 --- a/src/math/i386/asin.s +++ b/src/math/i386/asin.s @@ -2,7 +2,18 @@ .type asinf,@function asinf: flds 4(%esp) - jmp 1f + mov 4(%esp),%eax + add %eax,%eax + cmp $0x01000000,%eax + jae 1f + # subnormal x, return x with underflow + fnstsw %ax + and $16,%ax + jnz 2f + fld %st(0) + fmul %st(1) + fstps 4(%esp) +2: ret .global asinl .type asinl,@function @@ -14,6 +25,16 @@ asinl: .type asin,@function asin: fldl 4(%esp) + mov 8(%esp),%eax + add %eax,%eax + cmp $0x00200000,%eax + jae 1f + # subnormal x, return x with underflow + fnstsw %ax + and $16,%ax + jnz 2f + fsts 4(%esp) +2: ret 1: fld %st(0) fld1 fsub %st(0),%st(1) |