mips: clear condition bit 23 in fpu too

We've been carrying this in Gentoo for quite a long time to fix some test
failures that people hit.

Original message:
	> make[4]: *** [/glibc/glibc-package-2.3/mips-linux/obj/math/test-fpucw.out] Error 1
	This test fails since the read back fpu control word is 0x80000 instead
	of 0x0. I wonder if this patch is correct:
	...
	which additionally masks out the condition bit 23 - note that the other
	condition bits (25-31) are masked out too?

URL: http://sourceware.org/ml/libc-alpha/2002-10/msg00392.html
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index 2d1ca84c8a33f1b66457300b80b38f3d36fe7b4c..8d919d0915613389c75e609eb20ec352a6ee5dd0 100644 (file)
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -1,3 +1,7 @@
+2012-08-27  Guido Guenther  <agx@sigxcpu.org>
+
+       * sysdeps/mips/fpu_control.h (_FPU_RESERVED): Set bit 23.
+
 2012-08-22  Joseph Myers  <joseph@codesourcery.com>
 
        * sysdeps/unix/sysv/linux/mips/kernel-features.h [_MIPS_SIM ==

diff --git a/ports/sysdeps/mips/fpu_control.h b/ports/sysdeps/mips/fpu_control.h
index e9c859a4e3da67465448b05966b5eda3456f2aa1..7307d030eae6cca7a415bdbe5d61a7373e3ff0a2 100644 (file)
--- a/ports/sysdeps/mips/fpu_control.h
+++ b/ports/sysdeps/mips/fpu_control.h
@@ -85,7 +85,7 @@ extern fpu_control_t __fpu_control;
 #define _FPU_RC_UP      0x2
 #define _FPU_RC_DOWN    0x3
 
-#define _FPU_RESERVED 0xfe3c0000  /* Reserved bits in cw */
+#define _FPU_RESERVED 0xfebc0000  /* Reserved bits in cw */
 
 
 /* The fdlibm code requires strict IEEE double precision arithmetic,