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| author | Philippe Mathieu-Daudé | 2021-02-13 01:09:57 +0100 |
|---|---|---|
| committer | Philippe Mathieu-Daudé | 2021-03-13 23:43:17 +0100 |
| commit | ca8def9bdbf3e62ef0afd9e02a51ef536019791a (patch) | |
| tree | d8b611bbdfb7fec73315bb342922177b7948d48c /target | |
| parent | target/mips/translate: Make gen_rdhwr() public (diff) | |
| download | qemu-ca8def9bdbf3e62ef0afd9e02a51ef536019791a.tar.gz qemu-ca8def9bdbf3e62ef0afd9e02a51ef536019791a.tar.xz qemu-ca8def9bdbf3e62ef0afd9e02a51ef536019791a.zip | |
target/mips/translate: Simplify PCPYH using deposit_i64()
Simplify the PCPYH (Parallel Copy Halfword) instruction by using
multiple calls to deposit_i64() which can be optimized by some
TCG backends.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210214175912.732946-11-f4bug@amsat.org>
Diffstat (limited to 'target')
| -rw-r--r-- | target/mips/translate.c | 34 |
1 files changed, 4 insertions, 30 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index d4316c15d1..1967c12d80 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -24091,36 +24091,10 @@ static void gen_mmi_pcpyh(DisasContext *ctx) tcg_gen_movi_i64(cpu_gpr[rd], 0); tcg_gen_movi_i64(cpu_gpr_hi[rd], 0); } else { - TCGv_i64 t0 = tcg_temp_new(); - TCGv_i64 t1 = tcg_temp_new(); - uint64_t mask = (1ULL << 16) - 1; - - tcg_gen_andi_i64(t0, cpu_gpr[rt], mask); - tcg_gen_movi_i64(t1, 0); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - - tcg_gen_mov_i64(cpu_gpr[rd], t1); - - tcg_gen_andi_i64(t0, cpu_gpr_hi[rt], mask); - tcg_gen_movi_i64(t1, 0); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - tcg_gen_shli_i64(t0, t0, 16); - tcg_gen_or_i64(t1, t0, t1); - - tcg_gen_mov_i64(cpu_gpr_hi[rd], t1); - - tcg_temp_free(t0); - tcg_temp_free(t1); + tcg_gen_deposit_i64(cpu_gpr[rd], cpu_gpr[rt], cpu_gpr[rt], 16, 16); + tcg_gen_deposit_i64(cpu_gpr[rd], cpu_gpr[rd], cpu_gpr[rd], 32, 32); + tcg_gen_deposit_i64(cpu_gpr_hi[rd], cpu_gpr_hi[rt], cpu_gpr_hi[rt], 16, 16); + tcg_gen_deposit_i64(cpu_gpr_hi[rd], cpu_gpr_hi[rd], cpu_gpr_hi[rd], 32, 32); } } |