diff options
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 73 |
1 files changed, 35 insertions, 38 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 33ebc7986..967506f45 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -6222,45 +6222,42 @@ L_stm_s_takeabort: return 1; } case 0x70: - if ((instr & 0xf0d0) == 0xf010) { //smuad //ichfly - u8 tar = BITS(16, 19); - u8 src1 = BITS(0, 3); - u8 src2 = BITS(8, 11); - u8 swap = BIT(5); - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF); - s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = a1*a2 + b1*b2; - return 1; - - } else if ((instr & 0xf0d0) == 0xf050) { //smusd - u8 tar = BITS(16, 19); - u8 src1 = BITS(0, 3); - u8 src2 = BITS(8, 11); - u8 swap = BIT(5); - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF); - s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = a1*a2 - b1*b2; - return 1; - } else if ((instr & 0xd0) == 0x10) { //smlad - u8 tar = BITS(16, 19); - u8 src1 = BITS(0, 3); - u8 src2 = BITS(8, 11); - u8 src3 = BITS(12, 15); - u8 swap = BIT(5); - - u32 a3 = state->Reg[src3]; - - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF); - s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = a1*a2 + b1*b2 + a3; + // ichfly + // SMUAD, SMUSD, SMLAD + if ((instr & 0xf0d0) == 0xf010 || (instr & 0xf0d0) == 0xf050 || (instr & 0xd0) == 0x10) { + const u8 rd_idx = BITS(16, 19); + const u8 rn_idx = BITS(0, 3); + const u8 rm_idx = BITS(8, 11); + const bool do_swap = (BIT(5) == 1); + + u32 rm_val = state->Reg[rm_idx]; + const u32 rn_val = state->Reg[rn_idx]; + + if (do_swap) + rm_val = (((rm_val & 0xFFFF) << 16) | (rm_val >> 16)); + + const s16 rm_lo = (rm_val & 0xFFFF); + const s16 rm_hi = ((rm_val >> 16) & 0xFFFF); + const s16 rn_lo = (rn_val & 0xFFFF); + const s16 rn_hi = ((rn_val >> 16) & 0xFFFF); + + // SMUAD + if ((instr & 0xf0d0) == 0xf010) { + state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi); + } + // SMUSD + else if ((instr & 0xf0d0) == 0xf050) { + state->Reg[rd_idx] = (rn_lo * rn_hi) - (rm_lo * rm_hi); + } + // SMLAD + else { + const u8 ra_idx = BITS(12, 15); + state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi) + (s32)state->Reg[ra_idx]; + } return 1; - } else printf ("Unhandled v6 insn: smuad/smusd/smlad/smlsd\n"); + } else { + printf ("Unhandled v6 insn: smlsd\n"); + } break; case 0x74: printf ("Unhandled v6 insn: smlald/smlsld\n"); |