From d6270972f79fe89a96fa7a3909991dad2e317033 Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Wed, 28 Mar 2012 14:57:58 +0000
Subject: Fix pow of negative numbers to integer exponents (bugs 369, 2678,
 3866).

---
 sysdeps/i386/fpu/e_pow.S | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'sysdeps/i386/fpu/e_pow.S')

diff --git a/sysdeps/i386/fpu/e_pow.S b/sysdeps/i386/fpu/e_pow.S
index 1abedf6284..b61a946082 100644
--- a/sysdeps/i386/fpu/e_pow.S
+++ b/sysdeps/i386/fpu/e_pow.S
@@ -114,7 +114,7 @@ ENTRY(__ieee754_pow)
 	fucomp	%st(1)		// y : x
 	fnstsw
 	sahf
-	jne	2f
+	jne	3f
 
 	/* OK, we have an integer value for y.  */
 	popl	%eax
@@ -157,7 +157,12 @@ ENTRY(__ieee754_pow)
 
 	cfi_adjust_cfa_offset (8)
 	.align ALIGNARG(4)
-2:	/* y is a real number.  */
+2:	/* y is a large integer (so even).  */
+	fxch			// x : y
+	fabs			// |x| : y
+	fxch			// y : x
+	.align ALIGNARG(4)
+3:	/* y is a real number.  */
 	fxch			// x : y
 	fldl	MO(one)		// 1.0 : x : y
 	fldl	MO(limit)	// 0.29 : 1.0 : x : y
-- 
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