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| author | Rich Felker <dalias@aerifal.cx> | 2012-03-19 04:56:07 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-03-19 04:56:07 -0400 |
| commit | bc33e617040166e971ec1e6822ac1cc417eb6c9c (patch) | |
| tree | 984dfc67487f0759fa5cceca0e9e53e28ad05b99 /src/math/i386/acos.s | |
| parent | 495a52ae7bb581aac2942d7cb095cca2ff53ca3c (diff) | |
| download | musl-bc33e617040166e971ec1e6822ac1cc417eb6c9c.tar.gz musl-bc33e617040166e971ec1e6822ac1cc417eb6c9c.tar.xz musl-bc33e617040166e971ec1e6822ac1cc417eb6c9c.zip | |
asm for inverse trig functions
unlike trig functions, these are easy to do in asm because they do not involve (arbitrary-precision) argument reduction. fpatan automatically takes care of domain issues, and in asin and acos, fsqrt takes care of them for us.
Diffstat (limited to 'src/math/i386/acos.s')
| -rw-r--r-- | src/math/i386/acos.s | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/math/i386/acos.s b/src/math/i386/acos.s new file mode 100644 index 00000000..6f9ef7f0 --- /dev/null +++ b/src/math/i386/acos.s @@ -0,0 +1,24 @@ +.global acosf +.type acosf,@function +acosf: + flds 4(%esp) + jmp 1f + +.global acosl +.type acosl,@function +acosl: + fldt 4(%esp) + jmp 1f + +.global acos +.type acos,@function +acos: + fldl 4(%esp) +1: fld %st(0) + fmul %st(0) + fld1 + fsubp %st(1) + fsqrt + fxch %st(1) + fpatan + ret |