target/arm: Clean up disas_thumb_insn
Now that everything is converted, remove the rest of the legacy decode. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190904193059.26202-69-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -10770,32 +10770,9 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
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static void disas_thumb_insn(DisasContext *s, uint32_t insn)
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{
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if (disas_t16(s, insn)) {
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return;
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if (!disas_t16(s, insn)) {
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unallocated_encoding(s);
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}
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/* fall back to legacy decoder */
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switch (insn >> 12) {
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case 0: case 1: /* add/sub (3reg, 2reg imm), shift imm; in decodetree */
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case 2: case 3: /* add, sub, cmp, mov (reg, imm), in decodetree */
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case 4: /* ldr lit, data proc (2reg), data proc ext, bx; in decodetree */
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case 5: /* load/store register offset, in decodetree */
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case 6: /* load/store word immediate offset, in decodetree */
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case 7: /* load/store byte immediate offset, in decodetree */
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case 8: /* load/store halfword immediate offset, in decodetree */
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case 9: /* load/store from stack, in decodetree */
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case 10: /* add PC/SP (immediate), in decodetree */
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case 11: /* misc, in decodetree */
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case 12: /* load/store multiple, in decodetree */
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case 13: /* conditional branch or swi, in decodetree */
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case 14:
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case 15:
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/* branches, in decodetree */
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goto illegal_op;
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}
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return;
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illegal_op:
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unallocated_encoding(s);
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}
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static bool insn_crosses_page(CPUARMState *env, DisasContext *s)
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