X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Fi386%2Fexp.s;h=ca0de1d4f2ac5b7a5db23de24777fb75bd0c7002;hb=e5fb6820a42a1f675ba09c15273953e1ace65777;hp=18f6cd67f6fbc5f24056ba6e9350ffdaec666092;hpb=6f26cf3dacf9d426bbd18cecb4d486da56c17351;p=musl

diff --git a/src/math/i386/exp.s b/src/math/i386/exp.s
index 18f6cd67..ca0de1d4 100644
--- a/src/math/i386/exp.s
+++ b/src/math/i386/exp.s
@@ -1,3 +1,37 @@
+.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
+	fld1
+	fld %st(1)
+	fabs
+	fucom %st(1)
+	fnstsw %ax
+	fstp %st(0)
+	fstp %st(0)
+	sahf
+	ja 1f
+	f2xm1
+	ret
+1:	call 1f
+	fld1
+	fsubrp
+	ret
+
 .global exp2f
 .type exp2f,@function
 exp2f:
@@ -34,6 +68,44 @@ exp:
 .type exp2,@function
 exp2:
 	fldl 4(%esp)
+1:	pushl $0x467ff000
+	flds (%esp)
+	xorl %eax,%eax
+	pushl $0x80000000
+	push %eax
+	fld %st(1)
+	fabs
+	fucom %st(1)
+	fnstsw
+	fstp %st(0)
+	fstp %st(0)
+	sahf
+	ja 2f
+	fld %st(0)
+	fistpl 8(%esp)
+	fildl 8(%esp)
+	fxch %st(1)
+	fsub %st(1)
+	mov $0x3fff,%eax
+	add %eax,8(%esp)
+	f2xm1
+	fld1
+	faddp
+	fldt (%esp)
+	fmulp
+	fstp %st(1)
+	add $12,%esp
+	ret
+
+2:	fld %st(0)
+	fstpt (%esp)
+	mov 9(%esp),%ah
+	and $0x7f,%ah
+	cmp $0x7f,%ah
+	jne 1f
+	decb 9(%esp)
+	fstp %st(0)
+	fldt (%esp)
 1:	fld %st(0)
 	frndint
 	fxch %st(1)
@@ -43,4 +115,5 @@ exp2:
 	faddp
 	fscale
 	fstp %st(1)
+	add $12,%esp
 	ret