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-rw-r--r--sysdeps/powerpc/powerpc64/fpu/s_trunc.S21
1 files changed, 12 insertions, 9 deletions
diff --git a/sysdeps/powerpc/powerpc64/fpu/s_trunc.S b/sysdeps/powerpc/powerpc64/fpu/s_trunc.S
index 3ddd298525..086ed0025e 100644
--- a/sysdeps/powerpc/powerpc64/fpu/s_trunc.S
+++ b/sysdeps/powerpc/powerpc64/fpu/s_trunc.S
@@ -1,5 +1,5 @@
 /* trunc function.  PowerPC64 version.
-   Copyright (C) 2004 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2006 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
@@ -18,12 +18,11 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <math_ldbl_opt.h>
 
 	.section	".toc","aw"
 .LC0:	/* 2**52 */
 	.tc FD_43300000_0[TC],0x4330000000000000
-.LC2:	/* -0.0 */
-	.tc FD_80000000_0[TC],0x8000000000000000
 	.section	".text"
 	
 /* double [fp1] trunc (double x [fp1])
@@ -33,7 +32,7 @@
    We set "round toward Zero" mode and trunc by adding +-2**52 then
    subtracting +-2**52.  */
 
-ENTRY (__trunc)
+EALIGN (__trunc, 4, 0)
 	CALL_MCOUNT 0
 	mffs	fp11		/* Save current FPU rounding mode.  */
 	lfd	fp13,.LC0@toc(2)
@@ -46,17 +45,18 @@ ENTRY (__trunc)
 	ble-	cr6,.L4
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
 	fsub	fp1,fp1,fp13	/* x-= TWO52;  */
-.L9:	
-	mtfsf	0x01,fp11	/* restore previous truncing mode.  */
+	fabs	fp1,fp1		/* if (x == 0.0)  */
+				/* x = 0.0; */
+	mtfsf	0x01,fp11	/* restore previous rounding mode.  */
 	blr
 .L4:
 	bge-	cr6,.L9		/* if (x < 0.0)  */
 	fsub	fp1,fp1,fp13	/* x-= TWO52;  */
 	fadd	fp1,fp1,fp13	/* x+= TWO52;  */
-	fcmpu	cr5,fp1,fp12	/* if (x > 0.0)  */
+	fnabs	fp1,fp1		/* if (x == 0.0)  */
+				/* x = -0.0; */
+.L9:
 	mtfsf	0x01,fp11	/* restore previous rounding mode.  */
-	bnelr+	cr5
-	lfd	fp1,.LC2@toc(2)	/* x must be -0.0 for the 0.0 case.  */	
 	blr
 	END (__trunc)
 
@@ -66,3 +66,6 @@ weak_alias (__trunc, trunc)
 weak_alias (__trunc, truncl)
 strong_alias (__trunc, __truncl)
 #endif
+#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
+compat_symbol (libm, __trunc, truncl, GLIBC_2_1)
+#endif