diff options
Diffstat (limited to 'src/core/arm/interpreter/armemu.cpp')
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 102 |
1 files changed, 74 insertions, 28 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 63cfd03c6..7a319b635 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -5882,8 +5882,10 @@ L_stm_s_takeabort: printf("Unhandled v6 insn: %08x", BITS(20, 27)); } break; - case 0x62: // QSUB16 and QADD16 - if ((instr & 0xFF0) == 0xf70 || (instr & 0xFF0) == 0xf10) { + case 0x62: // QADD16, QASX, QSAX, and QSUB16 + if ((instr & 0xFF0) == 0xf10 || (instr & 0xFF0) == 0xf30 || + (instr & 0xFF0) == 0xf50 || (instr & 0xFF0) == 0xf70) + { const u8 rd_idx = BITS(12, 15); const u8 rn_idx = BITS(16, 19); const u8 rm_idx = BITS(0, 3); @@ -5895,15 +5897,26 @@ L_stm_s_takeabort: s32 lo_result; s32 hi_result; + // QADD16 + if ((instr & 0xFF0) == 0xf10) { + lo_result = (rn_lo + rm_lo); + hi_result = (rn_hi + rm_hi); + } + // QASX + else if ((instr & 0xFF0) == 0xf30) { + lo_result = (rn_lo - rm_hi); + hi_result = (rn_hi + rm_lo); + } + // QSAX + else if ((instr & 0xFF0) == 0xf50) { + lo_result = (rn_lo + rm_hi); + hi_result = (rn_hi - rm_lo); + } // QSUB16 - if ((instr & 0xFF0) == 0xf70) { + else { lo_result = (rn_lo - rm_lo); hi_result = (rn_hi - rm_hi); } - else { // QADD16 - lo_result = (rn_lo + rm_lo); - hi_result = (rn_hi + rm_hi); - } if (lo_result > 0x7FFF) lo_result = 0x7FFF; @@ -6078,22 +6091,28 @@ L_stm_s_takeabort: //ichfly //SSAT16 { - u8 tar = BITS(12, 15); - u8 src = BITS(0, 3); - u8 val = BITS(16, 19) + 1; - s16 a1 = (state->Reg[src]); - s16 a2 = (state->Reg[src] >> 0x10); - s16 min = (s16)(0x8000 >> (16 - val)); - s16 max = 0x7FFF >> (16 - val); - if (min > a1) a1 = min; - if (max < a1) a1 = max; - if (min > a2) a2 = min; - if (max < a2) a2 = max; - u32 temp2 = ((u32)(a2)) << 0x10; - state->Reg[tar] = (a1 & 0xFFFF) | (temp2); + const u8 rd_idx = BITS(12, 15); + const u8 rn_idx = BITS(0, 3); + const u8 num_bits = BITS(16, 19) + 1; + const s16 min = -(0x8000 >> (16 - num_bits)); + const s16 max = (0x7FFF >> (16 - num_bits)); + s16 rn_lo = (state->Reg[rn_idx]); + s16 rn_hi = (state->Reg[rn_idx] >> 16); + + if (rn_lo > max) + rn_lo = max; + else if (rn_lo < min) + rn_lo = min; + + if (rn_hi > max) + rn_hi = max; + else if (rn_hi < min) + rn_hi = min; + + state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi & 0xFFFF) << 16); + return 1; } - return 1; default: break; } @@ -6314,11 +6333,14 @@ L_stm_s_takeabort: } case 0x70: // ichfly - // SMUAD, SMUSD, SMLAD - if ((instr & 0xf0d0) == 0xf010 || (instr & 0xf0d0) == 0xf050 || (instr & 0xd0) == 0x10) { + // SMUAD, SMUSD, SMLAD, and SMLSD + if ((instr & 0xf0d0) == 0xf010 || (instr & 0xf0d0) == 0xf050 || + (instr & 0xd0) == 0x10 || (instr & 0xd0) == 0x50) + { const u8 rd_idx = BITS(16, 19); const u8 rn_idx = BITS(0, 3); const u8 rm_idx = BITS(8, 11); + const u8 ra_idx = BITS(12, 15); const bool do_swap = (BIT(5) == 1); u32 rm_val = state->Reg[rm_idx]; @@ -6341,13 +6363,14 @@ L_stm_s_takeabort: state->Reg[rd_idx] = (rn_lo * rm_lo) - (rn_hi * rm_hi); } // SMLAD - else { - const u8 ra_idx = BITS(12, 15); + else if ((instr & 0xd0) == 0x10) { state->Reg[rd_idx] = (rn_lo * rm_lo) + (rn_hi * rm_hi) + (s32)state->Reg[ra_idx]; } + // SMLSD + else { + state->Reg[rd_idx] = ((rn_lo * rm_lo) - (rn_hi * rm_hi)) + (s32)state->Reg[ra_idx]; + } return 1; - } else { - printf ("Unhandled v6 insn: smlsd\n"); } break; case 0x74: @@ -6357,7 +6380,30 @@ L_stm_s_takeabort: printf ("Unhandled v6 insn: smmla/smmls/smmul\n"); break; case 0x78: - printf ("Unhandled v6 insn: usad/usada8\n"); + if (BITS(20, 24) == 0x18) + { + const u8 rm_idx = BITS(8, 11); + const u8 rn_idx = BITS(0, 3); + const u8 rd_idx = BITS(16, 19); + + const u32 rm_val = state->Reg[rm_idx]; + const u32 rn_val = state->Reg[rn_idx]; + + const u8 diff1 = (u8)std::labs((rn_val & 0xFF) - (rm_val & 0xFF)); + const u8 diff2 = (u8)std::labs(((rn_val >> 8) & 0xFF) - ((rm_val >> 8) & 0xFF)); + const u8 diff3 = (u8)std::labs(((rn_val >> 16) & 0xFF) - ((rm_val >> 16) & 0xFF)); + const u8 diff4 = (u8)std::labs(((rn_val >> 24) & 0xFF) - ((rm_val >> 24) & 0xFF)); + + u32 finalDif = (diff1 + diff2 + diff3 + diff4); + + // Op is USADA8 if true. + const u8 ra_idx = BITS(12, 15); + if (ra_idx != 15) + finalDif += state->Reg[ra_idx]; + + state->Reg[rd_idx] = finalDif; + return 1; + } break; case 0x7a: printf ("Unhandled v6 insn: usbfx\n"); |