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| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-11-22 15:10:21 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-11-22 15:10:21 +0000 |
| commit | 185f07621fc42c1da194ada0fe98439f07f78aa0 (patch) | |
| tree | 3c184eef12185c5eac2498eafe1c026626e34bc7 /target-mips | |
| parent | e7c240035fe1ffbb6efba10e8db002f92459ad00 (diff) | |
| download | qemu-185f07621fc42c1da194ada0fe98439f07f78aa0.zip | |
Optimize the conventional move operation.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3720 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/translate.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index b3ae2ccfea..55e6290f31 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -1240,6 +1240,12 @@ static void gen_arith (CPUState *env, DisasContext *ctx, uint32_t opc, return; } GEN_LOAD_REG_TN(T0, rs); + /* Specialcase the conventional move operation. */ + if (rt == 0 && (opc == OPC_ADDU || opc == OPC_DADDU + || opc == OPC_SUBU || opc == OPC_DSUBU)) { + GEN_STORE_TN_REG(rd, T0); + return; + } GEN_LOAD_REG_TN(T1, rt); switch (opc) { case OPC_ADD: |