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authorRichard Henderson <rth@twiddle.net>2012-10-09 14:50:00 -0700
committerBlue Swirl <blauwirbel@gmail.com>2012-10-13 10:17:28 +0000
commit20132b96055e1da1d114067c15bf53e78a25d1c4 (patch)
treeef09008f6b3f63ef3067350a2cd27898c2643c05 /target-sparc/int64_helper.c
parent6234ac09a947d1402f92b6d25ccea6faa4433b5b (diff)
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target-sparc: Don't compute full flags value so often
Avoid speculatively computing flags before every potentially trapping operation and instead do the flags computation when a trap actually occurs. This gives approximately 30% speedup in emulation. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-sparc/int64_helper.c')
-rw-r--r--target-sparc/int64_helper.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/target-sparc/int64_helper.c b/target-sparc/int64_helper.c
index 5d0bc6c..df37aa1 100644
--- a/target-sparc/int64_helper.c
+++ b/target-sparc/int64_helper.c
@@ -64,6 +64,11 @@ void do_interrupt(CPUSPARCState *env)
int intno = env->exception_index;
trap_state *tsptr;
+ /* Compute PSR before exposing state. */
+ if (env->cc_op != CC_OP_FLAGS) {
+ cpu_get_psr(env);
+ }
+
#ifdef DEBUG_PCALL
if (qemu_loglevel_mask(CPU_LOG_INT)) {
static int count;