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Merge pull request #311 from lioncash/usada
armemu: Implement USAD8 and USADA8
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commit
7095c4959b
@ -6374,7 +6374,30 @@ L_stm_s_takeabort:
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printf ("Unhandled v6 insn: smmla/smmls/smmul\n");
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printf ("Unhandled v6 insn: smmla/smmls/smmul\n");
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break;
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break;
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case 0x78:
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case 0x78:
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printf ("Unhandled v6 insn: usad/usada8\n");
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if (BITS(20, 24) == 0x18)
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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 rd_idx = BITS(16, 19);
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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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const u8 diff1 = (u8)::abs((rn_val & 0xFF) - (rm_val & 0xFF));
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const u8 diff2 = (u8)::abs(((rn_val >> 8) & 0xFF) - ((rm_val >> 8) & 0xFF));
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const u8 diff3 = (u8)::abs(((rn_val >> 16) & 0xFF) - ((rm_val >> 16) & 0xFF));
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const u8 diff4 = (u8)::abs(((rn_val >> 24) & 0xFF) - ((rm_val >> 24) & 0xFF));
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u32 finalDif = (diff1 + diff2 + diff3 + diff4);
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// Op is USADA8 if true.
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const u8 ra_idx = BITS(12, 15);
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if (ra_idx != 15)
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finalDif += state->Reg[ra_idx];
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state->Reg[rd_idx] = finalDif;
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return 1;
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}
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break;
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break;
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case 0x7a:
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case 0x7a:
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printf ("Unhandled v6 insn: usbfx\n");
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printf ("Unhandled v6 insn: usbfx\n");
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