Revision: 45567
http://brlcad.svn.sourceforge.net/brlcad/?rev=45567&view=rev
Author: erikgreenwald
Date: 2011-07-21 21:19:52 +0000 (Thu, 21 Jul 2011)
Log Message:
-----------
ia32 seems to be unhappy about trying to address ebx at all in PIC mode, so
simplify by completely duplicating the asm section to contain all the
specialisms
Modified Paths:
--------------
brlcad/trunk/src/libbu/simd.c
Modified: brlcad/trunk/src/libbu/simd.c
===================================================================
--- brlcad/trunk/src/libbu/simd.c 2011-07-21 21:01:01 UTC (rev 45566)
+++ brlcad/trunk/src/libbu/simd.c 2011-07-21 21:19:52 UTC (rev 45567)
@@ -25,19 +25,13 @@
bu_simd_level()
{
#if defined(__GNUC__) && defined(__SSE__)
- int b=0, c=0, d=0;
- asm volatile(
- /* since we're PIC, we need to stash EBX on ia32 */
+ int c=0, d=0;
# ifdef __i386__
- "pushl %%ebx;"
+ asm volatile("pushl %%ebx;cpuid;popl %%ebx;":"=c"(c),"=d"(d):"a"(0x1));
+# else
+ int b=0;
+ asm volatile("cpuid":"=b"(b),"=c"(c),"=d"(d):"a"(0x1));
# endif
- "cpuid;"
-# ifdef __i386__
- "popl %%ebx;"
-# endif
- : "=b"(b), "=c"(c), "=d" (d)
- : "a" (0x1));
-
if(c & 0x100000)
return BU_SIMD_SSE4_2;
if(c & 0x080000)
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