diff options
| author | Richard Henderson <rth@twiddle.net> | 2015-08-05 11:04:11 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-08-18 09:11:12 -0700 |
| commit | 112e4518f0d38fc3c52e55c7d7e77b66a295ec2b (patch) | |
| tree | fc55cbf2eebfa7d52d0702222ee0cbac570f3af1 /target-alpha/translate.c | |
| parent | 5f2a80adc6fd2b2e4e0579a6613a9913e3cc9a05 (diff) | |
target-alpha: Special case cmpbge with zero
Knowing the comparator is zero leads to a simpler operation.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-alpha/translate.c')
| -rw-r--r-- | target-alpha/translate.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/target-alpha/translate.c b/target-alpha/translate.c index 81d4ff827c..b766ae3daa 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -1507,7 +1507,12 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) break; case 0x0F: /* CMPBGE */ - gen_helper_cmpbge(vc, va, vb); + if (ra == 31) { + /* Special case 0 >= X as X == 0. */ + gen_helper_cmpbe0(vc, vb); + } else { + gen_helper_cmpbge(vc, va, vb); + } break; case 0x12: /* S8ADDL */ |