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Unified Diff: fusl/src/math/i386/acos.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/acos.s
diff --git a/fusl/src/math/i386/acos.s b/fusl/src/math/i386/acos.s
new file mode 100644
index 0000000000000000000000000000000000000000..47f365efb1ea7493c34f7d64b7db33761e4337bd
--- /dev/null
+++ b/fusl/src/math/i386/acos.s
@@ -0,0 +1,28 @@
+# use acos(x) = atan2(fabs(sqrt((1-x)*(1+x))), x)
+
+.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)
+ fld1
+ fsub %st(0),%st(1)
+ fadd %st(2)
+ fmulp
+ fsqrt
+ fabs # fix sign of zero (matters in downward rounding mode)
+ fxch %st(1)
+ fpatan
+ ret
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