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Diffstat (limited to 'sysdeps/i386/fpu/s_sinf.S')
-rw-r--r--sysdeps/i386/fpu/s_sinf.S15
1 files changed, 14 insertions, 1 deletions
diff --git a/sysdeps/i386/fpu/s_sinf.S b/sysdeps/i386/fpu/s_sinf.S
index a010d60f5e..5ca45f52e2 100644
--- a/sysdeps/i386/fpu/s_sinf.S
+++ b/sysdeps/i386/fpu/s_sinf.S
@@ -7,10 +7,23 @@
 
 RCSID("$NetBSD: s_sinf.S,v 1.3 1995/05/09 00:27:53 jtc Exp $")
 
-/* A float's domain isn't large enough to require argument reduction. */
 ENTRY(__sinf)
 	flds	4(%esp)
 	fsin
+	fnstsw	%ax
+	testl	$0x400,%eax
+	jnz	1f
+	ret
+	.align ALIGNARG(4)
+1:	fldpi
+	fadd	%st(0)
+	fxch	%st(1)
+2:	fprem1
+	fnstsw	%ax
+	testl	$0x400,%eax
+	jnz	2b
+	fstp	%st(1)
+	fsin
 	ret
 END (__sinf)
 weak_alias (__sinf, sinf)