http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49104
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2011.05.22 18:04:30
Target Milestone|--- |4.6.1
Ever Confirmed|0 |1
--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2011-05-22 18:04:30
UTC ---
No, the problem is in search_line_mmx (lex.c), compiled with SSE option. This
option also enables CMOVE instruction, so we have protect usage of
search_line_mmx with following patch:
--cut here--
Index: libcpp/lex.c
===================================================================
--- libcpp/lex.c (revision 174030)
+++ libcpp/lex.c (working copy)
@@ -480,7 +480,7 @@
static void __attribute__((constructor))
init_vectorized_lexer (void)
{
- unsigned dummy, ecx = 0, edx = 0;
+ unsigned dummy, ecx = 0, edx = 0, edx_e = 0;
search_line_fast_type impl = search_line_acc_char;
int minimum = 0;
@@ -488,7 +488,7 @@
minimum = 3;
#elif defined(__SSE2__)
minimum = 2;
-#elif defined(__SSE__) || defined(__3dNOW_A__)
+#elif defined(__SSE__)
minimum = 1;
#endif
@@ -503,9 +503,9 @@
else if (minimum == 1 || (edx & bit_SSE))
impl = search_line_mmx;
}
- else if (__get_cpuid (0x80000001, &dummy, &dummy, &dummy, &edx))
+ else if (__get_cpuid (0x80000001, &dummy, &dummy, &dummy, &edx_e))
{
- if (minimum == 1 || edx & bit_3DNOWP)
+ if (minimum == 1 || (edx_e & bit_3DNOWP && edx & bit_CMOV))
impl = search_line_mmx;
}
--cut here--
Reinhard, can you please test the above patch?
