PowerPC floating point little-endian [9 of 15]

http://sourceware.org/ml/libc-alpha/2013-07/msg00200.html

This works around the fact that vsx is disabled in current
little-endian gcc.  Also, float constants take 4 bytes in memory
vs. 16 bytes for vector constants, and we don't need to write one lot
of masks for double (register format) and another for float (mem
format).

	* sysdeps/powerpc/fpu/s_float_bitwise.h (__float_and_test28): Don't
	use vector int constants.
	(__float_and_test24, __float_and8, __float_get_exp): Likewise.

2 files changed, 35 insertions, 25 deletions

diff --git a/ChangeLog b/ChangeLog
index 2de7a41767..9d2d856729 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-10-04  Alan Modra  <amodra@gmail.com>
+
+	* sysdeps/powerpc/fpu/s_float_bitwise.h (__float_and_test28): Don't
+	use vector int constants.
+	(__float_and_test24, __float_and8, __float_get_exp): Likewise.
+
 2013-10-04  Anton Blanchard <anton@au1.ibm.com>
 
 	* sysdeps/powerpc/fpu/fenv_libc.h (fenv_union_t): Replace int
diff --git a/sysdeps/powerpc/fpu/s_float_bitwise.h b/sysdeps/powerpc/fpu/s_float_bitwise.h
index 8e4adca868..c0a4e56be0 100644
--- a/sysdeps/powerpc/fpu/s_float_bitwise.h
+++ b/sysdeps/powerpc/fpu/s_float_bitwise.h
@@ -23,18 +23,19 @@
 #include <math_private.h>
 
 /* Returns (int)(num & 0x7FFFFFF0 == value) */
-static inline
-int __float_and_test28 (float num, float value)
+static inline int
+__float_and_test28 (float num, float value)
 {
   float ret;
 #ifdef _ARCH_PWR7
-  vector int mask = (vector int) {
-    0x7ffffffe, 0x00000000, 0x00000000, 0x0000000
-  };
+  union {
+    int i;
+    float f;
+  } mask = { .i = 0x7ffffff0 };
   __asm__ (
-  /* the 'f' constrain is use on mask because we just need
+  /* the 'f' constraint is used on mask because we just need
    * to compare floats, not full vector */
-    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask)
+    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)
   );
 #else
   int32_t inum;
@@ -46,16 +47,17 @@ int __float_and_test28 (float num, float value)
 }
 
 /* Returns (int)(num & 0x7FFFFF00 == value) */
-static inline
-int __float_and_test24 (float num, float value)
+static inline int
+__float_and_test24 (float num, float value)
 {
   float ret;
 #ifdef _ARCH_PWR7
-  vector int mask = (vector int) {
-    0x7fffffe0, 0x00000000, 0x00000000, 0x0000000
-  };
+  union {
+    int i;
+    float f;
+  } mask = { .i = 0x7fffff00 };
   __asm__ (
-    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask)
+    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)
   );
 #else
   int32_t inum;
@@ -67,16 +69,17 @@ int __float_and_test24 (float num, float value)
 }
 
 /* Returns (float)(num & 0x7F800000) */
-static inline
-float __float_and8 (float num)
+static inline float
+__float_and8 (float num)
 {
   float ret;
 #ifdef _ARCH_PWR7
-  vector int mask = (vector int) {
-    0x7ff00000, 0x00000000, 0x00000000, 0x00000000
-  };
+  union {
+    int i;
+    float f;
+  } mask = { .i = 0x7f800000 };
   __asm__ (
-    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask)
+    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)
   );
 #else
   int32_t inum;
@@ -88,17 +91,18 @@ float __float_and8 (float num)
 }
 
 /* Returns ((int32_t)(num & 0x7F800000) >> 23) */
-static inline
-int32_t __float_get_exp (float num)
+static inline int32_t
+__float_get_exp (float num)
 {
   int32_t inum;
 #ifdef _ARCH_PWR7
   float ret;
-  vector int mask = (vector int) {
-    0x7ff00000, 0x00000000, 0x00000000, 0x00000000
-  };
+  union {
+    int i;
+    float f;
+  } mask = { .i = 0x7f800000 };
   __asm__ (
-    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask)
+    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)
   );
   GET_FLOAT_WORD(inum, ret);
 #else