PowerPC floating point little-endian [11 of 15]

http://sourceware.org/ml/libc-alpha/2013-07/msg00202.html

Another little-endian fix.

	* sysdeps/powerpc/fpu_control.h (_FPU_GETCW): Rewrite using
	64-bit int/double union.
	(_FPU_SETCW): Likewise.
	* sysdeps/powerpc/fpu/tst-setcontext-fpscr.c (_GET_DI_FPSCR): Likewise.
	(_SET_DI_FPSCR, _GET_SI_FPSCR, _SET_SI_FPSCR): Likewise.

1 files changed, 18 insertions, 14 deletions

diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h
index c61a2e12cc..86e5ab16f9 100644
--- a/sysdeps/powerpc/fpu_control.h
+++ b/sysdeps/powerpc/fpu_control.h
@@ -93,22 +93,26 @@ extern fpu_control_t __fpu_control;
 # define _FPU_IEEE     0x000000f0
 
 /* Type of the control word.  */
-typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+typedef unsigned int fpu_control_t;
 
 /* Macros for accessing the hardware control word.  */
-# define _FPU_GETCW(cw) ( { \
-  union { double __d; fpu_control_t __cw[2]; } \
-    __tmp __attribute__ ((__aligned__(8))); \
-  __asm__ ("mffs 0; stfd%U0 0,%0" : "=m" (__tmp.__d) : : "fr0"); \
-  (cw) = __tmp.__cw[1]; \
-  __tmp.__cw[1]; } )
-# define _FPU_SETCW(cw) { \
-  union { double __d; fpu_control_t __cw[2]; } \
-    __tmp __attribute__ ((__aligned__(8))); \
-  __tmp.__cw[0] = 0xFFF80000; /* More-or-less arbitrary; this is a QNaN. */ \
-  __tmp.__cw[1] = (cw);							\
-  __asm__ ("lfd%U0 0,%0; mtfsf 255,0" : : "m" (__tmp.__d) : "fr0"); \
-}
+# define _FPU_GETCW(cw)						\
+  ({union { double __d; unsigned long long __ll; } __u;		\
+    register double __fr;					\
+    __asm__ ("mffs %0" : "=f" (__fr));				\
+    __u.__d = __fr;						\
+    (cw) = (fpu_control_t) __u.__ll;				\
+    (fpu_control_t) __u.__ll;					\
+  })
+
+# define _FPU_SETCW(cw)						\
+  { union { double __d; unsigned long long __ll; } __u;		\
+    register double __fr;					\
+    __u.__ll = 0xfff80000LL << 32; /* This is a QNaN.  */	\
+    __u.__ll |= (cw) & 0xffffffffLL;				\
+    __fr = __u.__d;						\
+    __asm__ ("mtfsf 255,%0" : : "f" (__fr));			\
+  }
 
 /* Default control word set at startup.  */
 extern fpu_control_t __fpu_control;