diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-09 18:50:43 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-09 18:50:43 +0000 |
| commit | a1f6684d6576df57175c18bfe3fbf23cb61922ab (patch) | |
| tree | f5ecb3e11083c24a3277e92776af7af51767ad79 /target-mips | |
| parent | 651721b2a55370cf04794d5ce397984c78fc0fec (diff) | |
target-mips: optimize mflo and mfhi
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6794 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/translate.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index aa6af3209d..5159538359 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -1772,42 +1772,41 @@ static void gen_arith (CPUState *env, DisasContext *ctx, uint32_t opc, static void gen_HILO (DisasContext *ctx, uint32_t opc, int reg) { const char *opn = "hilo"; - TCGv t0 = tcg_temp_local_new(); if (reg == 0 && (opc == OPC_MFHI || opc == OPC_MFLO)) { /* Treat as NOP. */ MIPS_DEBUG("NOP"); - goto out; + return; } switch (opc) { case OPC_MFHI: - tcg_gen_mov_tl(t0, cpu_HI[0]); - gen_store_gpr(t0, reg); + tcg_gen_mov_tl(cpu_gpr[reg], cpu_HI[0]); opn = "mfhi"; break; case OPC_MFLO: - tcg_gen_mov_tl(t0, cpu_LO[0]); - gen_store_gpr(t0, reg); + tcg_gen_mov_tl(cpu_gpr[reg], cpu_LO[0]); opn = "mflo"; break; case OPC_MTHI: - gen_load_gpr(t0, reg); - tcg_gen_mov_tl(cpu_HI[0], t0); + if (reg != 0) + tcg_gen_mov_tl(cpu_HI[0], cpu_gpr[reg]); + else + tcg_gen_movi_tl(cpu_HI[0], 0); opn = "mthi"; break; case OPC_MTLO: - gen_load_gpr(t0, reg); - tcg_gen_mov_tl(cpu_LO[0], t0); + if (reg != 0) + tcg_gen_mov_tl(cpu_LO[0], cpu_gpr[reg]); + else + tcg_gen_movi_tl(cpu_LO[0], 0); opn = "mtlo"; break; default: MIPS_INVAL(opn); generate_exception(ctx, EXCP_RI); - goto out; + return; } MIPS_DEBUG("%s %s", opn, regnames[reg]); - out: - tcg_temp_free(t0); } static void gen_muldiv (DisasContext *ctx, uint32_t opc, |