Hello!
As reported in [1] the host processor detection has not yet been updated
to recognize Intel Ivy Bridge and Haswell processors.
This small patch adds the detection of these processors and assumes
core-avx2 as march for unknown processors of the PENTIUMPRO family that
support AVX2.
Best regards
Christian Widmer
[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57927
2013-08-27 Christian Widmer <[email protected]>
PR target/57927
* config/i386/driver-i386.c (host_detect_local_cpu): Add detection of Ivy
Bridge and Haswell processors and assume core-avx2 for unknown AVX2 capable
processors
Index: gcc/config/i386/driver-i386.c
===================================================================
*** gcc/config/i386/driver-i386.c (revision 202013)
--- gcc/config/i386/driver-i386.c (working copy)
*************** const char *host_detect_local_cpu (int a
*** 662,667 ****
--- 662,675 ----
/* Sandy Bridge. */
cpu = "corei7-avx";
break;
+ case 0x3a:
+ /* Ivy Bridge. */
+ cpu = "corei7-avx";
+ break;
+ case 0x3c:
+ /* Haswell. */
+ cpu = "core-avx2";
+ break;
case 0x17:
case 0x1d:
/* Penryn. */
*************** const char *host_detect_local_cpu (int a
*** 675,682 ****
if (arch)
{
/* This is unknown family 0x6 CPU. */
! if (has_avx)
! /* Assume Sandy Bridge. */
cpu = "corei7-avx";
else if (has_sse4_2)
{
--- 683,693 ----
if (arch)
{
/* This is unknown family 0x6 CPU. */
! if (has_avx2)
! /* Assume Haswell. */
! cpu = "core-avx2";
! else if (has_avx)
! /* Assume Sandy/Ivy Bridge. */
cpu = "corei7-avx";
else if (has_sse4_2)
{
