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| author | bunnei <bunneidev@gmail.com> | 2014-12-18 16:04:31 +0100 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2014-12-18 16:04:31 +0100 |
| commit | 8ac22e7efc4c8fc25766892534c3e844c92e5d28 (patch) | |
| tree | 73b3e8b0b4eb5873963c8e9db0f77c710f2081bb | |
| parent | Merge pull request #298 from lioncash/flags (diff) | |
| parent | armemu: Combine SSUB16, SADD16, SASX, and SSAX. (diff) | |
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| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 57 |
1 files changed, 23 insertions, 34 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 3b1a36bdd..b9ac8b9ad 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -5827,8 +5827,10 @@ L_stm_s_takeabort: case 0x3f: printf ("Unhandled v6 insn: rbit\n"); break; - case 0x61: - if ((instr & 0xFF0) == 0xf70) { //ssub16 + case 0x61: // SSUB16, SADD16, SSAX, and SASX + if ((instr & 0xFF0) == 0xf70 || (instr & 0xFF0) == 0xf10 || + (instr & 0xFF0) == 0xf50 || (instr & 0xFF0) == 0xf30) + { const u8 rd_idx = BITS(12, 15); const u8 rm_idx = BITS(0, 3); const u8 rn_idx = BITS(16, 19); @@ -5836,40 +5838,27 @@ L_stm_s_takeabort: const s16 rn_hi = ((state->Reg[rn_idx] >> 16) & 0xFFFF); const s16 rm_lo = (state->Reg[rm_idx] & 0xFFFF); const s16 rm_hi = ((state->Reg[rm_idx] >> 16) & 0xFFFF); - state->Reg[rd_idx] = ((rn_lo - rm_lo) & 0xFFFF) | (((rn_hi - rm_hi) & 0xFFFF) << 16); - return 1; - } else if ((instr & 0xFF0) == 0xf10) { //sadd16 - const u8 rd_idx = BITS(12, 15); - const u8 rm_idx = BITS(0, 3); - const u8 rn_idx = BITS(16, 19); - const s16 rm_lo = (state->Reg[rm_idx] & 0xFFFF); - const s16 rm_hi = ((state->Reg[rm_idx] >> 16) & 0xFFFF); - const s16 rn_lo = (state->Reg[rn_idx] & 0xFFFF); - const s16 rn_hi = ((state->Reg[rn_idx] >> 16) & 0xFFFF); - state->Reg[rd_idx] = ((rn_lo + rm_lo) & 0xFFFF) | (((rn_hi + rm_hi) & 0xFFFF) << 16); - return 1; - } else if ((instr & 0xFF0) == 0xf50) { //ssax - u8 tar = BITS(12, 15); - u8 src1 = BITS(16, 19); - u8 src2 = BITS(0, 3); - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = (state->Reg[src2] & 0xFFFF); - s16 b2 = ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = ((a1 + b2) & 0xFFFF) | (((a2 - b1) & 0xFFFF) << 0x10); - return 1; - } else if ((instr & 0xFF0) == 0xf30) { //sasx - u8 tar = BITS(12, 15); - u8 src1 = BITS(16, 19); - u8 src2 = BITS(0, 3); - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = (state->Reg[src2] & 0xFFFF); - s16 b2 = ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = ((a1 - b2) & 0xFFFF) | (((a2 + b1) & 0xFFFF) << 0x10); + // SSUB16 + if ((instr & 0xFF0) == 0xf70) { + state->Reg[rd_idx] = ((rn_lo - rm_lo) & 0xFFFF) | (((rn_hi - rm_hi) & 0xFFFF) << 16); + } + // SADD16 + else if ((instr & 0xFF0) == 0xf10) { + state->Reg[rd_idx] = ((rn_lo + rm_lo) & 0xFFFF) | (((rn_hi + rm_hi) & 0xFFFF) << 16); + } + // SSAX + else if ((instr & 0xFF0) == 0xf50) { + state->Reg[rd_idx] = ((rn_lo + rm_hi) & 0xFFFF) | (((rn_hi - rm_lo) & 0xFFFF) << 16); + } + // SASX + else { + state->Reg[rd_idx] = ((rn_lo - rm_hi) & 0xFFFF) | (((rn_hi + rm_lo) & 0xFFFF) << 16); + } return 1; - } else printf ("Unhandled v6 insn: sadd/ssub/ssax/sasx\n"); + } else { + printf("Unhandled v6 insn: %08x", BITS(20, 27)); + } break; case 0x62: // QSUB16 and QADD16 if ((instr & 0xFF0) == 0xf70 || (instr & 0xFF0) == 0xf10) { |