1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/powerpc/s_copysign.S b/sysdeps/powerpc/s_copysign.S
new file mode 100644
index 0000000000..adc7df226a
--- /dev/null
+++ b/sysdeps/powerpc/s_copysign.S
@@ -0,0 +1,60 @@
+/* Copy a sign bit between floating-point values.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+  
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+  
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+  
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* This has been coded in assembler because GCC makes such a mess of it
+   when it's coded in C.  */
+
+	.section ".text"
+	.align 2
+	.globl __copysign
+	.type __copysign,@function
+__copysign:	
+/* double [f1] copysign (double [f1] x, double [f2] y);
+   copysign(x,y) returns a value with the magnitude of x and
+   with the sign bit of y.  */
+
+	stwu	%r1,-16(%r1)
+	stfd	%f2,8(%r1)
+	lwz	%r3,8(%r1)
+	cmpwi   %r3,0
+	addi    %r1,%r1,16
+	blt     0f
+	fabs    %f1,%f1
+	blr
+0:	fnabs   %f1,%f1
+	blr
+0:
+	.size	 __copysign,0b-__copysign
+	
+	.globl copysign
+	.globl copysignf
+	.globl __copysignf
+	.weak copysign
+	.weak copysignf
+	.set copysign,__copysign
+/* It turns out that it's safe to use this code even for single-precision.  */
+	.set __copysignf,__copysign
+	.set copysignf,__copysign
+#ifdef NO_LONG_DOUBLE
+	.globl copysignl
+	.globl __copysignl
+	.weak copysignl
+	.set __copysignl,__copysign
+	.set copysignl,__copysign
+#endif