[pypy-svn] pypy default: Simplify a bit READ_TIMESTAMP on x86-64.
arigo
commits-noreply at bitbucket.org
Thu Jan 6 19:50:11 CET 2011
Author: Armin Rigo <arigo at tunes.org>
Branch:
Changeset: r40424:6e6a3dc06eea
Date: 2011-01-06 17:47 +0100
http://bitbucket.org/pypy/pypy/changeset/6e6a3dc06eea/
Log: Simplify a bit READ_TIMESTAMP on x86-64. It generates better code in
this version.
diff --git a/pypy/translator/c/src/asm_gcc_x86_64.h b/pypy/translator/c/src/asm_gcc_x86_64.h
--- a/pypy/translator/c/src/asm_gcc_x86_64.h
+++ b/pypy/translator/c/src/asm_gcc_x86_64.h
@@ -2,7 +2,7 @@
*/
#define READ_TIMESTAMP(val) do { \
- unsigned int _eax, _edx; \
- asm volatile("rdtsc" : "=a" (_eax), "=d" (_edx)); \
- val = (((unsigned long) _edx) << 32) | _eax; \
+ unsigned long _rax, _rdx; \
+ asm volatile("rdtsc" : "=rax"(_rax), "=rdx"(_rdx)); \
+ val = (_rdx << 32) | _rax; \
} while (0)
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