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armemu: Implement SMLALD/SMLSLD
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parent
2bbbe68399
commit
82c3962b95
@ -6503,8 +6503,39 @@ L_stm_s_takeabort:
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return 1;
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}
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break;
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case 0x74:
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printf ("Unhandled v6 insn: smlald/smlsld\n");
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case 0x74: // SMLALD and SMLSLD
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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 rdlo_idx = BITS(12, 15);
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const u8 rdhi_idx = BITS(16, 19);
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const bool do_swap = (BIT(5) == 1);
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const u32 rdlo_val = state->Reg[rdlo_idx];
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const u32 rdhi_val = state->Reg[rdhi_idx];
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const u32 rn_val = state->Reg[rn_idx];
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u32 rm_val = state->Reg[rm_idx];
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if (do_swap)
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rm_val = (((rm_val & 0xFFFF) << 16) | (rm_val >> 16));
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const s32 product1 = (s16)(rn_val & 0xFFFF) * (s16)(rm_val & 0xFFFF);
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const s32 product2 = (s16)((rn_val >> 16) & 0xFFFF) * (s16)((rm_val >> 16) & 0xFFFF);
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s64 result;
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// SMLALD
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if (BIT(6) == 0) {
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result = (product1 + product2) + (s64)(rdlo_val | ((s64)rdhi_val << 32));
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}
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// SMLSLD
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else {
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result = (product1 - product2) + (s64)(rdlo_val | ((s64)rdhi_val << 32));
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}
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state->Reg[rdlo_idx] = (result & 0xFFFFFFFF);
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state->Reg[rdhi_idx] = ((result >> 32) & 0xFFFFFFFF);
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return 1;
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}
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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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