diff options
Diffstat (limited to 'src/arch/alpha')
| -rw-r--r-- | src/arch/alpha/isa/decoder.isa | 194 |
1 files changed, 178 insertions, 16 deletions
diff --git a/src/arch/alpha/isa/decoder.isa b/src/arch/alpha/isa/decoder.isa index 52e124ad5..fe70e4d16 100644 --- a/src/arch/alpha/isa/decoder.isa +++ b/src/arch/alpha/isa/decoder.isa @@ -338,6 +338,31 @@ 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>; }}); } + + 0x30: ctpop({{ + uint64_t count = 0; + for (int i = 0; Rb<63:i>; ++i) { + if (Rb<i:i> == 0x1) + ++count; + } + Rc = count; + }}, IntAluOp); + + 0x31: perr({{ + uint64_t temp = 0; + int hi = 7; + int lo = 0; + for (int i = 0; i < 8; ++i) { + uint8_t ra_ub = Ra.uq<hi:lo>; + uint8_t rb_ub = Rb.uq<hi:lo>; + temp += (ra_ub >= rb_ub) ? + (ra_ub - rb_ub) : (rb_ub - ra_ub); + hi += 8; + lo += 8; + } + Rc = temp; + }}); + 0x32: ctlz({{ uint64_t count = 0; uint64_t temp = Rb; @@ -359,26 +384,163 @@ decode OPCODE default Unknown::unknown() { if (!(temp<7:0>)) { temp >>= 8; count += 8; } if (!(temp<3:0>)) { temp >>= 4; count += 4; } if (!(temp<1:0>)) { temp >>= 2; count += 2; } + if (!(temp<0:0> & ULL(0x1))) { + temp >>= 1; count += 1; + } if (!(temp<0:0> & ULL(0x1))) count += 1; Rc = count; }}, IntAluOp); - format FailUnimpl { - 0x30: ctpop(); - 0x31: perr(); - 0x34: unpkbw(); - 0x35: unpkbl(); - 0x36: pkwb(); - 0x37: pklb(); - 0x38: minsb8(); - 0x39: minsw4(); - 0x3a: minub8(); - 0x3b: minuw4(); - 0x3c: maxub8(); - 0x3d: maxuw4(); - 0x3e: maxsb8(); - 0x3f: maxsw4(); - } + + 0x34: unpkbw({{ + Rc = (Rb.uq<7:0> + | (Rb.uq<15:8> << 16) + | (Rb.uq<23:16> << 32) + | (Rb.uq<31:24> << 48)); + }}, IntAluOp); + + 0x35: unpkbl({{ + Rc = (Rb.uq<7:0> | (Rb.uq<15:8> << 32)); + }}, IntAluOp); + + 0x36: pkwb({{ + Rc = (Rb.uq<7:0> + | (Rb.uq<23:16> << 8) + | (Rb.uq<39:32> << 16) + | (Rb.uq<55:48> << 24)); + }}, IntAluOp); + + 0x37: pklb({{ + Rc = (Rb.uq<7:0> | (Rb.uq<39:32> << 8)); + }}, IntAluOp); + + 0x38: minsb8({{ + uint64_t temp = 0; + int hi = 63; + int lo = 56; + for (int i = 7; i >= 0; --i) { + int8_t ra_sb = Ra.uq<hi:lo>; + int8_t rb_sb = Rb.uq<hi:lo>; + temp = ((temp << 8) + | ((ra_sb < rb_sb) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 8; + lo -= 8; + } + Rc = temp; + }}); + + 0x39: minsw4({{ + uint64_t temp = 0; + int hi = 63; + int lo = 48; + for (int i = 3; i >= 0; --i) { + int16_t ra_sw = Ra.uq<hi:lo>; + int16_t rb_sw = Rb.uq<hi:lo>; + temp = ((temp << 16) + | ((ra_sw < rb_sw) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 16; + lo -= 16; + } + Rc = temp; + }}); + + 0x3a: minub8({{ + uint64_t temp = 0; + int hi = 63; + int lo = 56; + for (int i = 7; i >= 0; --i) { + uint8_t ra_ub = Ra.uq<hi:lo>; + uint8_t rb_ub = Rb.uq<hi:lo>; + temp = ((temp << 8) + | ((ra_ub < rb_ub) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 8; + lo -= 8; + } + Rc = temp; + }}); + + 0x3b: minuw4({{ + uint64_t temp = 0; + int hi = 63; + int lo = 48; + for (int i = 3; i >= 0; --i) { + uint16_t ra_sw = Ra.uq<hi:lo>; + uint16_t rb_sw = Rb.uq<hi:lo>; + temp = ((temp << 16) + | ((ra_sw < rb_sw) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 16; + lo -= 16; + } + Rc = temp; + }}); + + 0x3c: maxub8({{ + uint64_t temp = 0; + int hi = 63; + int lo = 56; + for (int i = 7; i >= 0; --i) { + uint8_t ra_ub = Ra.uq<hi:lo>; + uint8_t rb_ub = Rb.uq<hi:lo>; + temp = ((temp << 8) + | ((ra_ub > rb_ub) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 8; + lo -= 8; + } + Rc = temp; + }}); + + 0x3d: maxuw4({{ + uint64_t temp = 0; + int hi = 63; + int lo = 48; + for (int i = 3; i >= 0; --i) { + uint16_t ra_uw = Ra.uq<hi:lo>; + uint16_t rb_uw = Rb.uq<hi:lo>; + temp = ((temp << 16) + | ((ra_uw > rb_uw) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 16; + lo -= 16; + } + Rc = temp; + }}); + + 0x3e: maxsb8({{ + uint64_t temp = 0; + int hi = 63; + int lo = 56; + for (int i = 7; i >= 0; --i) { + int8_t ra_sb = Ra.uq<hi:lo>; + int8_t rb_sb = Rb.uq<hi:lo>; + temp = ((temp << 8) + | ((ra_sb > rb_sb) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 8; + lo -= 8; + } + Rc = temp; + }}); + + 0x3f: maxsw4({{ + uint64_t temp = 0; + int hi = 63; + int lo = 48; + for (int i = 3; i >= 0; --i) { + int16_t ra_sw = Ra.uq<hi:lo>; + int16_t rb_sw = Rb.uq<hi:lo>; + temp = ((temp << 16) + | ((ra_sw > rb_sw) ? Ra.uq<hi:lo> + : Rb.uq<hi:lo>)); + hi -= 16; + lo -= 16; + } + Rc = temp; + }}); format BasicOperateWithNopCheck { 0x70: decode RB { |