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| author | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-01-25 22:56:38 -0800 |
|---|---|---|
| committer | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-01-25 22:56:38 -0800 |
| commit | 76ee8711f8e04b9ada61e91e6ac6f1fd01a4ca1e (patch) | |
| tree | d3d838463115df47339cb2758d0c58424424d953 /riscv | |
| parent | 5bae2bf37228d1a67d8f4c6175a6cda768d8b3e6 (diff) | |
| download | spike-76ee8711f8e04b9ada61e91e6ac6f1fd01a4ca1e.zip spike-76ee8711f8e04b9ada61e91e6ac6f1fd01a4ca1e.tar.gz spike-76ee8711f8e04b9ada61e91e6ac6f1fd01a4ca1e.tar.bz2 | |
[sim,opcodes] add mulhsu instruction
Diffstat (limited to 'riscv')
| -rw-r--r-- | riscv/execute.h | 7 | ||||
| -rw-r--r-- | riscv/insns/mulhsu.h | 8 |
2 files changed, 14 insertions, 1 deletions
diff --git a/riscv/execute.h b/riscv/execute.h index 8539974..844745d 100644 --- a/riscv/execute.h +++ b/riscv/execute.h @@ -334,13 +334,18 @@ switch((insn.bits >> 0x0) & 0x7f) #include "insns/sll.h" break; } + if((insn.bits & 0x1ffff) == 0x4b3) + { + #include "insns/mulh.h" + break; + } #include "insns/unimp.h" } case 0x2: { if((insn.bits & 0x1ffff) == 0x533) { - #include "insns/mulh.h" + #include "insns/mulhsu.h" break; } if((insn.bits & 0x1ffff) == 0x133) diff --git a/riscv/insns/mulhsu.h b/riscv/insns/mulhsu.h new file mode 100644 index 0000000..506424d --- /dev/null +++ b/riscv/insns/mulhsu.h @@ -0,0 +1,8 @@ +if(xpr64) +{ + int64_t a = RS1; + uint64_t b = RS2; + RD = (int128_t(a) * uint128_t(b)) >> 64; +} +else + RD = sext32((sreg_t(RS1) * reg_t(RS2)) >> 32); |