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| author | tijl <tijl@FreeBSD.org> | 2012-09-16 16:58:49 +0000 |
|---|---|---|
| committer | tijl <tijl@FreeBSD.org> | 2012-09-16 16:58:49 +0000 |
| commit | 19adcfe7704745bb790acd5875fa7d90522d4c7b (patch) | |
| tree | 69cbb1f1594d19c75250a1ecc2a0559b8892a72b /lib/msun | |
| parent | fdc252682f645da4c9ac5c2f221a18bb7f124bda (diff) | |
| download | FreeBSD-src-19adcfe7704745bb790acd5875fa7d90522d4c7b.zip FreeBSD-src-19adcfe7704745bb790acd5875fa7d90522d4c7b.tar.gz | |
Optimise i387 trigonometric functions. Replace "andw 0x400,%ax \ jnz" with
"sahf \ jp", "fprem1" with "fprem" and "fstsw %ax" with "fnstsw %ax".
Diffstat (limited to 'lib/msun')
| -rw-r--r-- | lib/msun/i387/s_cos.S | 10 | ||||
| -rw-r--r-- | lib/msun/i387/s_sin.S | 10 | ||||
| -rw-r--r-- | lib/msun/i387/s_tan.S | 12 |
3 files changed, 16 insertions, 16 deletions
diff --git a/lib/msun/i387/s_cos.S b/lib/msun/i387/s_cos.S index 9c3f2ca..9951ab0 100644 --- a/lib/msun/i387/s_cos.S +++ b/lib/msun/i387/s_cos.S @@ -40,16 +40,16 @@ ENTRY(cos) fldl 4(%esp) fcos fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 +2: fprem fnstsw %ax - andw $0x400,%ax - jnz 2b + sahf + jp 2b fstp %st(1) fcos ret diff --git a/lib/msun/i387/s_sin.S b/lib/msun/i387/s_sin.S index 11c4d63..eb04754 100644 --- a/lib/msun/i387/s_sin.S +++ b/lib/msun/i387/s_sin.S @@ -40,16 +40,16 @@ ENTRY(sin) fldl 4(%esp) fsin fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 +2: fprem fnstsw %ax - andw $0x400,%ax - jnz 2b + sahf + jp 2b fstp %st(1) fsin ret diff --git a/lib/msun/i387/s_tan.S b/lib/msun/i387/s_tan.S index e31ebdf..182b9f7 100644 --- a/lib/msun/i387/s_tan.S +++ b/lib/msun/i387/s_tan.S @@ -40,17 +40,17 @@ ENTRY(tan) fldl 4(%esp) fptan fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f fstp %st(0) ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 - fstsw %ax - andw $0x400,%ax - jnz 2b +2: fprem + fnstsw %ax + sahf + jp 2b fstp %st(1) fptan fstp %st(0) |
