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| author | Ganesh Gopalasubramanian <Ganesh.Gopalasubramanian@amd.com> | 2012-05-03 07:34:25 +0000 |
|---|---|---|
| committer | Venkataramanan Kumar <vekumar@gcc.gnu.org> | 2012-05-03 07:34:25 +0000 |
| commit | d130f146484b854b059a2ec226dee531069a001d (patch) | |
| tree | 634792f465bf5422c15e1a7b4df109c92817084a /gcc | |
| parent | bcb4ad361cdc348f19f290bdb172853cbc50859d (diff) | |
| download | gcc-d130f146484b854b059a2ec226dee531069a001d.zip gcc-d130f146484b854b059a2ec226dee531069a001d.tar.gz gcc-d130f146484b854b059a2ec226dee531069a001d.tar.bz2 | |
With -march=native generate fma3 instruction by default for AMD processors which support both fma and fma4
From-SVN: r187077
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/driver-i386.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 97ce580..6c8132f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2012-05-03 Ganesh Gopalasubramanian <Ganesh.Gopalasubramanian@amd.com> + + * config/i386/driver-i386.c (host_detect_local_cpu): Reset + has_fma4 for AMD processors with both fma3 and fma4 support. + 2012-05-03 Kirill Yukhin <kirill.yukhin@intel.com> PR target/53201 diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c index e452ba5..8fe7ab8 100644 --- a/gcc/config/i386/driver-i386.c +++ b/gcc/config/i386/driver-i386.c @@ -474,6 +474,8 @@ const char *host_detect_local_cpu (int argc, const char **argv) has_abm = ecx & bit_ABM; has_lwp = ecx & bit_LWP; has_fma4 = ecx & bit_FMA4; + if (vendor == SIG_AMD && has_fma4 && has_fma) + has_fma4 = 0; has_xop = ecx & bit_XOP; has_tbm = ecx & bit_TBM; has_lzcnt = ecx & bit_LZCNT; |