diff options
| author |  bunnei <bunneidev@gmail.com> | 2014-12-20 15:18:05 -0500 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2014-12-20 15:18:05 -0500 |
| commit | 1c50a036ddfedf92306c895eff091a306f53785e (patch) | |
| tree | 6a3373f4211755dfae54b43b46def15b6319dc4b /src | |
| parent | acabd7be82b4174a3adab0771df6320bdbc5a85b (diff) | |
| parent | 4b506cec017dab0244349780b70f53dc762d61f8 (diff) | |
Merge pull request #314 from lioncash/qsax-qasx
armemu: Implement QASX and QSAX
Diffstat (limited to 'src')
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 63cfd03c..c0406943 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; |