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a9f691bff3b16c21e0ab10a75b2243707117b92a
[musl]
/
asin.s
1
.global asinf
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.type asinf,@function
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asinf:
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flds 4(%esp)
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mov 4(%esp),%eax
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add %eax,%eax
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cmp $0x01000000,%eax
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jae 1f
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# subnormal x, return x with underflow
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fnstsw %ax
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and $16,%ax
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jnz 2f
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fld %st(0)
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fmul %st(1)
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fstps 4(%esp)
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2: ret
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.global asinl
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.type asinl,@function
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asinl:
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fldt 4(%esp)
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jmp 1f
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.global asin
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.type asin,@function
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asin:
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fldl 4(%esp)
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mov 8(%esp),%eax
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add %eax,%eax
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cmp $0x00200000,%eax
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jae 1f
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# subnormal x, return x with underflow
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fnstsw %ax
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and $16,%ax
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jnz 2f
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fsts 4(%esp)
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2: ret
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1: fld %st(0)
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fld1
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fsub %st(0),%st(1)
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fadd %st(2)
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fmulp
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fsqrt
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fpatan
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ret