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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-09-04 12:30:54 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-09-05 13:23:04 +0100 |
| commit | 151c2f2841b01bf6fef079c9f1db15a86cae8276 (patch) | |
| tree | 9d5f83d3e40559d88eeee974f4dc0343056064f8 /target | |
| parent | 43f7e42c7d515f41ff243034f51b28267ae69938 (diff) | |
| download | qemu-151c2f2841b01bf6fef079c9f1db15a86cae8276.zip qemu-151c2f2841b01bf6fef079c9f1db15a86cae8276.tar.gz qemu-151c2f2841b01bf6fef079c9f1db15a86cae8276.tar.bz2 | |
target/arm: Convert T16, shift immediate
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-65-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/t16.decode | 8 | ||||
| -rw-r--r-- | target/arm/translate.c | 26 |
2 files changed, 10 insertions, 24 deletions
diff --git a/target/arm/t16.decode b/target/arm/t16.decode index f128110..79a1d66 100644 --- a/target/arm/t16.decode +++ b/target/arm/t16.decode @@ -126,6 +126,14 @@ ADD_rri 10101 rd:3 ........ \ STM 11000 ... ........ @ldstm LDM_t16 11001 ... ........ @ldstm +# Shift (immediate) + +@shift_i ..... shim:5 rm:3 rd:3 &s_rrr_shi %s rn=%reg_0 + +MOV_rxri 000 00 ..... ... ... @shift_i shty=0 # LSL +MOV_rxri 000 01 ..... ... ... @shift_i shty=1 # LSR +MOV_rxri 000 10 ..... ... ... @shift_i shty=2 # ASR + # Add/subtract (three low registers) @addsub_3 ....... rm:3 rn:3 rd:3 \ diff --git a/target/arm/translate.c b/target/arm/translate.c index 48ed6f6..d409afd 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -10754,7 +10754,7 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn) static void disas_thumb_insn(DisasContext *s, uint32_t insn) { - uint32_t val, op, rm, rd, shift; + uint32_t val, rd; int32_t offset; TCGv_i32 tmp; TCGv_i32 tmp2; @@ -10766,29 +10766,7 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn) /* fall back to legacy decoder */ switch (insn >> 12) { - case 0: case 1: - - rd = insn & 7; - op = (insn >> 11) & 3; - if (op == 3) { - /* - * 0b0001_1xxx_xxxx_xxxx - * - Add, subtract (three low registers) - * - Add, subtract (two low registers and immediate) - * In decodetree. - */ - goto illegal_op; - } else { - /* shift immediate */ - rm = (insn >> 3) & 7; - shift = (insn >> 6) & 0x1f; - tmp = load_reg(s, rm); - gen_arm_shift_im(tmp, op, shift, s->condexec_mask == 0); - if (!s->condexec_mask) - gen_logic_CC(tmp); - store_reg(s, rd, tmp); - } - break; + case 0: case 1: /* add/sub (3reg, 2reg imm), shift imm; in decodetree */ case 2: case 3: /* add, sub, cmp, mov (reg, imm), in decodetree */ goto illegal_op; case 4: |