summaryrefslogtreecommitdiff
path: root/src/arch/mips/isa/decoder.isa
diff options
context:
space:
mode:
Diffstat (limited to 'src/arch/mips/isa/decoder.isa')
-rw-r--r--src/arch/mips/isa/decoder.isa42
1 files changed, 15 insertions, 27 deletions
diff --git a/src/arch/mips/isa/decoder.isa b/src/arch/mips/isa/decoder.isa
index 3f3bd370a..8a8033a00 100644
--- a/src/arch/mips/isa/decoder.isa
+++ b/src/arch/mips/isa/decoder.isa
@@ -133,33 +133,29 @@ decode OPCODE_HI default Unknown::unknown() {
0x1: jr_hb({{
Config1Reg config1 = Config1;
if (config1.ca == 0) {
- pc.nnpc(Rs);
+ NNPC = Rs;
} else {
panic("MIPS16e not supported\n");
}
- PCS = pc;
}}, IsReturn, ClearHazards);
default: jr({{
Config1Reg config1 = Config1;
if (config1.ca == 0) {
- pc.nnpc(Rs);
+ NNPC = Rs;
} else {
panic("MIPS16e not supported\n");
}
- PCS = pc;
}}, IsReturn);
}
0x1: decode HINT {
0x1: jalr_hb({{
- Rd = pc.nnpc();
- pc.nnpc(Rs);
- PCS = pc;
+ Rd = NNPC;
+ NNPC = Rs;
}}, IsCall, ClearHazards);
default: jalr({{
- Rd = pc.nnpc();
- pc.nnpc(Rs);
- PCS = pc;
+ Rd = NNPC;
+ NNPC = Rs;
}}, IsCall);
}
}
@@ -332,14 +328,9 @@ decode OPCODE_HI default Unknown::unknown() {
}
format Jump {
- 0x2: j({{
- pc.nnpc((pc.npc() & 0xF0000000) | (JMPTARG << 2));
- PCS = pc;
- }});
- 0x3: jal({{
- pc.nnpc((pc.npc() & 0xF0000000) | (JMPTARG << 2));
- PCS = pc;
- }}, IsCall, Link);
+ 0x2: j({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2); }});
+ 0x3: jal({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2); }},
+ IsCall, Link);
}
format Branch {
@@ -708,16 +699,15 @@ decode OPCODE_HI default Unknown::unknown() {
ConfigReg config = Config;
SRSCtlReg srsCtl = SRSCtl;
DPRINTF(MipsPRA,"Restoring PC - %x\n",EPC);
- MipsISA::PCState pc = PCS;
if (status.erl == 1) {
status.erl = 0;
- pc.npc(ErrorEPC);
+ NPC = ErrorEPC;
// Need to adjust NNPC, otherwise things break
- pc.nnpc(ErrorEPC + sizeof(MachInst));
+ NNPC = ErrorEPC + sizeof(MachInst);
} else {
- pc.npc(EPC);
+ NPC = EPC;
// Need to adjust NNPC, otherwise things break
- pc.nnpc(EPC + sizeof(MachInst));
+ NNPC = EPC + sizeof(MachInst);
status.exl = 0;
if (config.ar >=1 &&
srsCtl.hss > 0 &&
@@ -726,7 +716,6 @@ decode OPCODE_HI default Unknown::unknown() {
//xc->setShadowSet(srsCtl.pss);
}
}
- PCS = pc;
LLFlag = 0;
Status = status;
SRSCtl = srsCtl;
@@ -734,15 +723,14 @@ decode OPCODE_HI default Unknown::unknown() {
0x1F: deret({{
DebugReg debug = Debug;
- MipsISA::PCState pc = PCS;
if (debug.dm == 1) {
debug.dm = 1;
debug.iexi = 0;
- pc.npc(DEPC);
+ NPC = DEPC;
} else {
+ NPC = NPC;
// Undefined;
}
- PCS = pc;
Debug = debug;
}}, IsReturn, IsSerializing, IsERET);
}