Author: Armin Rigo <[email protected]>
Branch:
Changeset: r75549:40d147ae0b10
Date: 2015-01-27 18:28 +0100
http://bitbucket.org/pypy/pypy/changeset/40d147ae0b10/
Log: Finally, found out why we have issue #900. Trying to fix it.
diff --git a/rpython/translator/c/src/asm_msvc.h
b/rpython/translator/c/src/asm_msvc.h
--- a/rpython/translator/c/src/asm_msvc.h
+++ b/rpython/translator/c/src/asm_msvc.h
@@ -2,3 +2,14 @@
#define PYPY_X86_CHECK_SSE2_DEFINED
RPY_EXTERN void pypy_x86_check_sse2(void);
#endif
+
+
+/* Provides the same access to RDTSC as used by the JIT backend. This
+ is needed (at least if the JIT is enabled) because otherwise the
+ JIT-produced assembler would use RDTSC while the non-jitted code
+ would use QueryPerformanceCounter(), giving different incompatible
+ results. See issue #900.
+*/
+#include <intrin.h>
+#pragma intrinsic(__rdtsc)
+#define READ_TIMESTAMP(val) do { val = (long long)__rdtsc(); } while (0)
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