| commit | 139e57dc4ad46c8bdf142d607c1819f0727795a3 | |
| author | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 7 Mar 2018 14:31:03 +0000 (7 14:31 +0000) | ||
| committer | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 7 Mar 2018 14:31:03 +0000 (7 14:31 +0000) | ||
| tree | a2f3871cade9720ac021f8cdb38d3be3270e83be | treesnapshot (tar.gz zip) |
| parent | f92a3555ee4fde08817ef16db7c8ddd599fde55d | commitdiff |
runtime: use a fence instruction before rdtsc
This implements the same choices made in the gc runtime, except that
for 32-bit x86 we only use the fence instruction if the processor
supports SSE2.
The code here is hacked up for speed; the gc runtime uses straight
assembler.
Reviewed-on: https://go-review.googlesource.com/97715
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@258336 138bc75d-0d04-0410-961f-82ee72b054a4
This implements the same choices made in the gc runtime, except that
for 32-bit x86 we only use the fence instruction if the processor
supports SSE2.
The code here is hacked up for speed; the gc runtime uses straight
assembler.
Reviewed-on: https://go-review.googlesource.com/97715
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@258336 138bc75d-0d04-0410-961f-82ee72b054a4
| gcc/go/gofrontend/MERGE | diffblobblamehistory | |
| libgo/runtime/runtime_c.c | diffblobblamehistory |