diff options
Diffstat (limited to 'arch/alpha/isa_desc')
| -rw-r--r-- | arch/alpha/isa_desc | 61 |
1 files changed, 59 insertions, 2 deletions
diff --git a/arch/alpha/isa_desc b/arch/alpha/isa_desc index 9fee12485..06a1081bc 100644 --- a/arch/alpha/isa_desc +++ b/arch/alpha/isa_desc @@ -2119,12 +2119,69 @@ decode OPCODE default Unknown::unknown() { 0x1c: decode INTFUNC { 0x00: decode RA { 31: sextb({{ Rc.sb = Rb_or_imm< 7:0>; }}); } 0x01: decode RA { 31: sextw({{ Rc.sw = Rb_or_imm<15:0>; }}); } + 0x32: ctlz({{ + uint64_t count = 0; + uint64_t temp = Rb; + if (temp & ULL(0xffffffff00000000)) + temp >>= 32; + else + count += 32; + if (temp & ULL(0xffff0000)) + temp >>= 16; + else + count += 16; + if (temp & ULL(0xff00)) + temp >>= 8; + else + count += 8; + if (temp & ULL(0xf0)) + temp >>= 4; + else + count += 4; + if (temp & ULL(0xC)) + temp >>= 2; + else + count += 2; + if (temp & ULL(0x2)) + temp >>= 1; + else + count += 1; + if ((temp & ULL(0x1)) != 0x1) + count += 1; + Rc = count; + }}, IntAluOp); + + 0x33: cttz({{ + uint64_t count = 0; + uint64_t temp = Rb; + if (!(temp & ULL(0x00000000ffffffff))) { + temp >>= 32; + count += 32; + } + if (!(temp & ULL(0x0000ffff))) { + temp >>= 16; + count += 16; + } + if (!(temp & ULL(0x00ff))) { + temp >>= 8; + count += 8; + } + if (!(temp & ULL(0x0f))) { + temp >>= 4; + count += 4; + } + if (!(temp & ULL(0x3))) { + temp >>= 2; + count += 2; + } + if (!(temp & ULL(0x1))) + count += 1; + Rc = count; + }}, IntAluOp); format FailUnimpl { 0x30: ctpop(); 0x31: perr(); - 0x32: ctlz(); - 0x33: cttz(); 0x34: unpkbw(); 0x35: unpkbl(); 0x36: pkwb(); |