diff options
Diffstat (limited to 'src/arch/sparc/isa/decoder.isa')
| -rw-r--r-- | src/arch/sparc/isa/decoder.isa | 65 |
1 files changed, 22 insertions, 43 deletions
diff --git a/src/arch/sparc/isa/decoder.isa b/src/arch/sparc/isa/decoder.isa index 7a48042c2..5c69598d5 100644 --- a/src/arch/sparc/isa/decoder.isa +++ b/src/arch/sparc/isa/decoder.isa @@ -76,9 +76,15 @@ decode OP default Unknown::unknown() }}); 0x2: bpccx(19, {{ if(passesCondition(Ccr<7:4>, COND2)) + { + //warn("Took branch!\n"); NNPC = xc->readPC() + disp; + } else + { + //warn("Didn't take branch!\n"); handle_annul + } }}); } } @@ -247,16 +253,14 @@ decode OP default Unknown::unknown() ((Rs1 & val2) | (carryin & (Rs1 | val2)))<0:>)<63:>}}, {{Rs1<63:> == val2<63:> && val2<63:> != resTemp<63:>}} ); - 0x1A: umulcc({{ + 0x1A: IntOpCcRes::umulcc({{ uint64_t resTemp; Rd = resTemp = Rs1.udw<31:0> * Rs2_or_imm13.udw<31:0>; - Y = resTemp<63:32>;}}, - {{0}},{{0}},{{0}},{{0}}); - 0x1B: smulcc({{ + Y = resTemp<63:32>;}}); + 0x1B: IntOpCcRes::smulcc({{ int64_t resTemp; Rd = resTemp = Rs1.sdw<31:0> * Rs2_or_imm13.sdw<31:0>; - Y = resTemp<63:32>;}}, - {{0}},{{0}},{{0}},{{0}}); + Y = resTemp<63:32>;}}); 0x1C: subccc({{ int64_t resTemp, val2 = Rs2_or_imm13; int64_t carryin = Ccr<0:0>; @@ -266,10 +270,9 @@ decode OP default Unknown::unknown() {{(~((Rs1<63:1> + (~(val2 + carryin))<63:1>) + (Rs1<0:> + (~(val2+carryin))<0:> + 1)<63:1>))<63:>}}, {{Rs1<63:> != val2<63:> && Rs1<63:> != resTemp<63:>}} ); - 0x1D: udivxcc({{ + 0x1D: IntOpCcRes::udivxcc({{ if(Rs2_or_imm13.udw == 0) fault = new DivisionByZero; - else Rd = Rs1.udw / Rs2_or_imm13.udw;}} - ,{{0}},{{0}},{{0}},{{0}}); + else Rd = Rs1.udw / Rs2_or_imm13.udw;}}); 0x1E: udivcc({{ uint32_t resTemp, val2 = Rs2_or_imm13.udw; int32_t overflow = 0; @@ -880,16 +883,11 @@ decode OP default Unknown::unknown() } }}); 0x39: Branch::return({{ - //If both MemAddressNotAligned and - //a fill trap happen, it's not clear - //which one should be returned. Addr target = Rs1 + Rs2_or_imm13; - if(target & 0x3) - fault = new MemAddressNotAligned; - else - NNPC = target; if(fault == NoFault) { + //Check for fills which are higher priority than alignment + //faults. if(Canrestore == 0) { if(Otherwin) @@ -897,18 +895,15 @@ decode OP default Unknown::unknown() else fault = new FillNNormal(Wstate<2:0>); } + //Check for alignment faults + else if(target & 0x3) + fault = new MemAddressNotAligned; else { - //CWP should be set directly so that it always happens - //Also, this will allow writing to the new window and - //reading from the old one + NNPC = target; Cwp = (Cwp - 1 + NWindows) % NWindows; Cansave = Cansave + 1; Canrestore = Canrestore - 1; - //This is here to make sure the CWP is written - //no matter what. This ensures that the results - //are written in the new window as well. - xc->setMiscRegWithEffect(MISCREG_CWP, Cwp); } } }}); @@ -926,7 +921,7 @@ decode OP default Unknown::unknown() xc->syscall(R1); #endif } - }}); + }}, IsSerializeAfter, IsNonSpeculative); 0x2: Trap::tccx({{ if(passesCondition(Ccr<7:4>, COND2)) { @@ -939,36 +934,27 @@ decode OP default Unknown::unknown() xc->syscall(R1); #endif } - }}); + }}, IsSerializeAfter, IsNonSpeculative); } 0x3B: Nop::flush({{/*Instruction memory flush*/}}); 0x3C: save({{ - //CWP should be set directly so that it always happens - //Also, this will allow writing to the new window and - //reading from the old one if(Cansave == 0) { if(Otherwin) fault = new SpillNOther(Wstate<5:3>); else fault = new SpillNNormal(Wstate<2:0>); - //Cwp = (Cwp + 2) % NWindows; } else if(Cleanwin - Canrestore == 0) { - //Cwp = (Cwp + 1) % NWindows; fault = new CleanWindow; } else { Cwp = (Cwp + 1) % NWindows; - Rd = Rs1 + Rs2_or_imm13; + Rd_next = Rs1 + Rs2_or_imm13; Cansave = Cansave - 1; Canrestore = Canrestore + 1; - //This is here to make sure the CWP is written - //no matter what. This ensures that the results - //are written in the new window as well. - xc->setMiscRegWithEffect(MISCREG_CWP, Cwp); } }}); 0x3D: restore({{ @@ -981,17 +967,10 @@ decode OP default Unknown::unknown() } else { - //CWP should be set directly so that it always happens - //Also, this will allow writing to the new window and - //reading from the old one Cwp = (Cwp - 1 + NWindows) % NWindows; - Rd = Rs1 + Rs2_or_imm13; + Rd_prev = Rs1 + Rs2_or_imm13; Cansave = Cansave + 1; Canrestore = Canrestore - 1; - //This is here to make sure the CWP is written - //no matter what. This ensures that the results - //are written in the new window as well. - xc->setMiscRegWithEffect(MISCREG_CWP, Cwp); } }}); 0x3E: decode FCN { |