math: x86: Use prefix for FP_INIT_ROUNDMODE

Not all compilers support the inline asm prefix '%v' to emit the avx
instruction if AVX is enable.  Use a prefix instead.

Checked on x86_64-linux-gnu and i686-linux-gnu.

diff --git a/sysdeps/x86/fpu/sfp-machine.h b/sysdeps/x86/fpu/sfp-machine.h
index fcbcf690531b7beb16626183729cb3d941f317a9..f06e3c0ca12a12e1aaed8f0a80841925475e4083 100644 (file)
--- a/sysdeps/x86/fpu/sfp-machine.h
+++ b/sysdeps/x86/fpu/sfp-machine.h
@@ -48,9 +48,15 @@ typedef unsigned int UTItype __attribute__ ((mode (TI)));
 
 # define FP_RND_MASK           0x6000
 
+# ifdef __AVX__
+#  define AVX_INSN_PREFIX      "v"
+# else
+#  define AVX_INSN_PREFIX      ""
+# endif
+
 # define FP_INIT_ROUNDMODE                                     \
   do {                                                         \
-    __asm__ __volatile__ ("%vstmxcsr\t%0" : "=m" (_fcw));      \
+    __asm__ __volatile__ (AVX_INSN_PREFIX "stmxcsr\t%0" : "=m" (_fcw)); \
   } while (0)
 #else
 # define _FP_W_TYPE_SIZE       32