diff options
| author | Richard Henderson <rth@twiddle.net> | 2012-10-09 14:50:00 -0700 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-10-13 10:17:28 +0000 |
| commit | 20132b96055e1da1d114067c15bf53e78a25d1c4 (patch) | |
| tree | ef09008f6b3f63ef3067350a2cd27898c2643c05 /target-sparc/int32_helper.c | |
| parent | 6234ac09a947d1402f92b6d25ccea6faa4433b5b (diff) | |
| download | qemu-20132b96055e1da1d114067c15bf53e78a25d1c4.tar.gz | |
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/int32_helper.c')
| -rw-r--r-- | target-sparc/int32_helper.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/target-sparc/int32_helper.c b/target-sparc/int32_helper.c index 9ac5aac33a..507c355cac 100644 --- a/target-sparc/int32_helper.c +++ b/target-sparc/int32_helper.c @@ -62,6 +62,11 @@ void do_interrupt(CPUSPARCState *env) { int cwp, intno = env->exception_index; + /* 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; |