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Unified Diff: fusl/src/math/i386/asin.s

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/src/math/i386/asin.s
diff --git a/fusl/src/math/i386/asin.s b/fusl/src/math/i386/asin.s
new file mode 100644
index 0000000000000000000000000000000000000000..a9f691bff3b16c21e0ab10a75b2243707117b92a
--- /dev/null
+++ b/fusl/src/math/i386/asin.s
@@ -0,0 +1,45 @@
+.global asinf
+.type asinf,@function
+asinf:
+ flds 4(%esp)
+ 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
+asinl:
+ fldt 4(%esp)
+ jmp 1f
+
+.global asin
+.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)
+ fadd %st(2)
+ fmulp
+ fsqrt
+ fpatan
+ ret
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