Made the annul of unconditional conditional branches behave properly, added code to read and write the strand_sts_reg, and made restored a Priv instruction.
--HG-- extra : convert_revision : 386512215f7243d230717c369217f8d2f9ada935
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1 changed files with 57 additions and 13 deletions
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@ -41,15 +41,16 @@ decode OP default Unknown::unknown()
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0x0: Trap::illtrap({{fault = new IllegalInstruction;}});
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format BranchN
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{
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//bpcc
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0x1: decode COND2
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{
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//Branch Always
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0x8: decode A
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{
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0x0: b(19, {{
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0x0: bpa(19, {{
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NNPC = xc->readPC() + disp;
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}});
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0x1: b(19, {{
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0x1: bpa(19, {{
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NPC = xc->readPC() + disp;
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NNPC = NPC + 4;
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}}, ',a');
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@ -57,10 +58,10 @@ decode OP default Unknown::unknown()
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//Branch Never
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0x0: decode A
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{
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0x0: bn(19, {{
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0x0: bpn(19, {{
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NNPC = NNPC;//Don't do anything
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}});
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0x1: bn(19, {{
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0x1: bpn(19, {{
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NPC = xc->readNextPC() + 4;
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NNPC = NPC + 4;
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}}, ',a');
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@ -81,13 +82,39 @@ decode OP default Unknown::unknown()
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}});
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}
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}
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0x2: bicc(22, {{
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//bicc
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0x2: decode COND2
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{
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//Branch Always
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0x8: decode A
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{
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0x0: ba(22, {{
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NNPC = xc->readPC() + disp;
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}});
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0x1: ba(22, {{
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NPC = xc->readPC() + disp;
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NNPC = NPC + 4;
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}}, ',a');
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}
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//Branch Never
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0x0: decode A
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{
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0x0: bn(22, {{
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NNPC = NNPC;//Don't do anything
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}});
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0x1: bn(22, {{
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NPC = xc->readNextPC() + 4;
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NNPC = NPC + 4;
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}}, ',a');
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}
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default: bicc(22, {{
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if(passesCondition(Ccr<3:0>, COND2))
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NNPC = xc->readPC() + disp;
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else
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handle_annul
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}});
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}
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}
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0x3: decode RCOND2
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{
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format BranchSplit
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@ -380,7 +407,15 @@ decode OP default Unknown::unknown()
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0x17: Priv::rdtick_cmpr({{Rd = TickCmpr;}});
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0x18: PrivCheck::rdstick({{Rd = Stick}}, {{Stick<63:>}});
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0x19: Priv::rdstick_cmpr({{Rd = StickCmpr;}});
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//0x1A-0x1F should cause an illegal instruction exception
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0x1A: Priv::rdstrand_sts_reg({{
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if(Pstate<2:> && !Hpstate<2:>)
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Rd = StrandStsReg<0:>;
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else
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Rd = StrandStsReg;
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}});
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//0x1A is supposed to be reserved, but it reads the strand
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//status register.
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//0x1B-0x1F should cause an illegal instruction exception
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}
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0x29: decode RS1 {
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0x00: HPriv::rdhprhpstate({{Rd = Hpstate;}});
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@ -515,7 +550,16 @@ decode OP default Unknown::unknown()
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Stick = Rs1 ^ Rs2_or_imm13;
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}});
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0x19: Priv::wrstick_cmpr({{StickCmpr = Rs1 ^ Rs2_or_imm13;}});
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//0x1A-0x1F should cause an illegal instruction exception
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0x1A: Priv::wrstrand_sts_reg({{
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if(Pstate<2:> && !Hpstate<2:>)
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StrandStsReg = StrandStsReg<63:1> |
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(Rs1 ^ Rs2_or_imm13)<0:>;
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else
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StrandStsReg = Rs1 ^ Rs2_or_imm13;
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}});
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//0x1A is supposed to be reserved, but it writes the strand
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//status register.
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//0x1B-0x1F should cause an illegal instruction exception
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}
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0x31: decode FCN {
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0x0: Priv::saved({{
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@ -527,7 +571,7 @@ decode OP default Unknown::unknown()
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else
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Otherwin = Otherwin - 1;
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}});
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0x1: BasicOperate::restored({{
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0x1: Priv::restored({{
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assert(Cansave || Otherwin);
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assert(Canrestore < NWindows - 2);
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Canrestore = Canrestore + 1;
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