From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Thu, 10 Mar 2022 17:48:44 +0000 (-0300)
Subject: math: x86: Use prefix for FP_INIT_ROUNDMODE
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aacd7e0eb6429854f6133bea49c1c4938ff30608;p=thirdparty%2Fglibc.git

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 fcbcf690531..f06e3c0ca12 100644
--- 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