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armemu: Implement SMMUL, SMMLA, and SMMLS.
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@ -6506,8 +6506,36 @@ L_stm_s_takeabort:
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case 0x74:
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printf ("Unhandled v6 insn: smlald/smlsld\n");
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break;
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case 0x75:
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printf ("Unhandled v6 insn: smmla/smmls/smmul\n");
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case 0x75: // SMMLA, SMMUL, and SMMLS
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{
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const u8 rm_idx = BITS(8, 11);
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const u8 rn_idx = BITS(0, 3);
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const u8 ra_idx = BITS(12, 15);
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const u8 rd_idx = BITS(16, 19);
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const bool do_round = (BIT(5) == 1);
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const u32 rm_val = state->Reg[rm_idx];
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const u32 rn_val = state->Reg[rn_idx];
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// Assume SMMUL by default.
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s64 result = (s64)(s32)rn_val * (s64)(s32)rm_val;
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if (ra_idx != 15) {
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const u32 ra_val = state->Reg[ra_idx];
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// SMMLA, otherwise SMMLS
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if (BIT(6) == 0)
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result += ((s64)ra_val << 32);
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else
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result = ((s64)ra_val << 32) - result;
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}
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if (do_round)
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result += 0x80000000;
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state->Reg[rd_idx] = ((result >> 32) & 0xFFFFFFFF);
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return 1;
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}
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break;
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case 0x78:
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if (BITS(20, 24) == 0x18)
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