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| author | Richard Henderson <richard.henderson@linaro.org> | 2020-06-25 20:31:11 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-06-26 14:31:12 +0100 |
| commit | dad3015f55f8d48f84f0eae36021a9c6f9587e57 (patch) | |
| tree | ac885ab639cb957bf071e87d0913f8ff00d1e967 | |
| parent | 438efea0bb639c9c2dfb42c8d9459e21aa183c8a (diff) | |
| download | qemu-dad3015f55f8d48f84f0eae36021a9c6f9587e57.zip qemu-dad3015f55f8d48f84f0eae36021a9c6f9587e57.tar.gz qemu-dad3015f55f8d48f84f0eae36021a9c6f9587e57.tar.bz2 | |
target/arm: Implement the SUBP instruction
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-14-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/translate-a64.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index ee9dfa8..abbcdbb 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -5315,19 +5315,39 @@ static void handle_crc32(DisasContext *s, */ static void disas_data_proc_2src(DisasContext *s, uint32_t insn) { - unsigned int sf, rm, opcode, rn, rd; + unsigned int sf, rm, opcode, rn, rd, setflag; sf = extract32(insn, 31, 1); + setflag = extract32(insn, 29, 1); rm = extract32(insn, 16, 5); opcode = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); - if (extract32(insn, 29, 1)) { + if (setflag && opcode != 0) { unallocated_encoding(s); return; } switch (opcode) { + case 0: /* SUBP(S) */ + if (sf == 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) { + goto do_unallocated; + } else { + TCGv_i64 tcg_n, tcg_m, tcg_d; + + tcg_n = read_cpu_reg_sp(s, rn, true); + tcg_m = read_cpu_reg_sp(s, rm, true); + tcg_gen_sextract_i64(tcg_n, tcg_n, 0, 56); + tcg_gen_sextract_i64(tcg_m, tcg_m, 0, 56); + tcg_d = cpu_reg(s, rd); + + if (setflag) { + gen_sub_CC(true, tcg_d, tcg_n, tcg_m); + } else { + tcg_gen_sub_i64(tcg_d, tcg_n, tcg_m); + } + } + break; case 2: /* UDIV */ handle_div(s, false, sf, rm, rn, rd); break; |