[PATCH, testsuite]: Avoid magic constants in gcc.target/i386/avx-os-support.h

[Uros Bizjak]

Hello!

2012-06-06  Uros Bizjak  <ubiz...@gmail.com>

        * gcc.target/i386/avx-os-support.h (XCR_XFEATURE_ENABLED_MASK): New.
        (XSTATE_FP): Ditto.
        (XSTATE_SSE): Ditto.
        (XSTATE_YMM): Ditto.
        (avx_os_support): Use new defines.

Tested on x86_64-pc-linux-gnu AVX target, committed to mainline SVN.

Uros.

Index: avx-os-support.h
===================================================================
--- avx-os-support.h    (revision 188268)
+++ avx-os-support.h    (working copy)
@@ -1,10 +1,18 @@
 /* Check if the OS supports executing AVX instructions.  */
 
+#define XCR_XFEATURE_ENABLED_MASK      0x0
+
+#define XSTATE_FP      0x1
+#define XSTATE_SSE     0x2
+#define XSTATE_YMM     0x4
+
 static int
 avx_os_support (void)
 {
   unsigned int eax, edx;
+  unsigned int ecx = XCR_XFEATURE_ENABLED_MASK;
 
-  __asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
-  return (eax & 6) == 6;
+  __asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx));
+
+  return (eax & (XSTATE_SSE | XSTATE_YMM)) == (XSTATE_SSE | XSTATE_YMM);
 }