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-rw-r--r--src/math/i386/expm1.s36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/math/i386/expm1.s b/src/math/i386/expm1.s
new file mode 100644
index 00000000..d6d511ef
--- /dev/null
+++ b/src/math/i386/expm1.s
@@ -0,0 +1,36 @@
+.global expm1f
+.type expm1f,@function
+expm1f:
+ flds 4(%esp)
+ jmp 1f
+
+.global expm1l
+.type expm1l,@function
+expm1l:
+ fldt 4(%esp)
+ jmp 1f
+
+.global expm1
+.type expm1,@function
+expm1:
+ fldl 4(%esp)
+1: fldl2e
+ fmulp
+ fld %st(0)
+ frndint
+ fldz
+ fcompi
+ jnz 1f
+ fstp %st(0)
+ f2xm1
+ ret
+1: fxch %st(1)
+ fsub %st(1)
+ f2xm1
+ fld1
+ faddp
+ fscale
+ fld1
+ fsubrp
+ fstp %st(1)
+ ret