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authorGabe Black <gblack@eecs.umich.edu>2010-12-08 10:45:14 -0800
committerGabe Black <gblack@eecs.umich.edu>2010-12-08 10:45:14 -0800
commitf26051eb1a5b8f3522acbb871133de66278fd517 (patch)
tree14b927d6d61bc4f2a36fccead9b0da13f2a7fb34 /src/arch/mips/isa/formats
parent7f3f90f71d6993f8a712294e40fe8723bc3d7dbc (diff)
downloadgem5-f26051eb1a5b8f3522acbb871133de66278fd517.tar.xz
MIPS: Take advantage of new PCState syntax.
Diffstat (limited to 'src/arch/mips/isa/formats')
-rw-r--r--src/arch/mips/isa/formats/branch.isa26
1 files changed, 9 insertions, 17 deletions
diff --git a/src/arch/mips/isa/formats/branch.isa b/src/arch/mips/isa/formats/branch.isa
index 232a743a7..ecc62d75d 100644
--- a/src/arch/mips/isa/formats/branch.isa
+++ b/src/arch/mips/isa/formats/branch.isa
@@ -225,16 +225,16 @@ output decoder {{
}};
def format Branch(code, *opt_flags) {{
- not_taken_code = ''
+ not_taken_code = 'NNPC = NNPC; NPC = NPC;'
#Build Instruction Flags
#Use Link & Likely Flags to Add Link/Condition Code
inst_flags = ('IsDirectControl', )
for x in opt_flags:
if x == 'Link':
- code += 'R31 = pc.nnpc();\n'
+ code += 'R31 = NNPC;\n'
elif x == 'Likely':
- not_taken_code = 'pc.advance();'
+ not_taken_code = 'NNPC = NPC; NPC = PC;'
inst_flags += ('IsCondDelaySlot', )
else:
inst_flags += (x, )
@@ -248,14 +248,12 @@ def format Branch(code, *opt_flags) {{
#Condition code
code = '''
bool cond;
- MipsISA::PCState pc = PCS;
%(code)s
if (cond) {
- pc.nnpc(pc.npc() + disp);
+ NNPC = NPC + disp;
} else {
%(not_taken_code)s
}
- PCS = pc;
''' % { "code" : code, "not_taken_code" : not_taken_code }
iop = InstObjParams(name, Name, 'Branch', code, inst_flags)
@@ -266,16 +264,16 @@ def format Branch(code, *opt_flags) {{
}};
def format DspBranch(code, *opt_flags) {{
- not_taken_code = ''
+ not_taken_code = 'NNPC = NNPC; NPC = NPC;'
#Build Instruction Flags
#Use Link & Likely Flags to Add Link/Condition Code
inst_flags = ('IsDirectControl', )
for x in opt_flags:
if x == 'Link':
- code += 'R32 = pc.nnpc();'
+ code += 'R32 = NNPC;'
elif x == 'Likely':
- not_taken_code = 'pc.advance();'
+ not_taken_code = 'NNPC = NPC, NPC = PC;'
inst_flags += ('IsCondDelaySlot', )
else:
inst_flags += (x, )
@@ -288,16 +286,14 @@ def format DspBranch(code, *opt_flags) {{
#Condition code
code = '''
- MipsISA::PCState pc = PCS;
bool cond;
uint32_t dspctl = DSPControl;
%(code)s
if (cond) {
- pc.nnpc(pc.npc() + disp);
+ NNPC = NPC + disp;
} else {
%(not_taken_code)s
}
- PCS = pc;
''' % { "code" : code, "not_taken_code" : not_taken_code }
iop = InstObjParams(name, Name, 'Branch', code, inst_flags)
@@ -314,17 +310,13 @@ def format Jump(code, *opt_flags) {{
for x in opt_flags:
if x == 'Link':
code = '''
- R31 = pc.nnpc();
+ R31 = NNPC;
''' + code
elif x == 'ClearHazards':
code += '/* Code Needed to Clear Execute & Inst Hazards */\n'
else:
inst_flags += (x, )
- code = '''
- MipsISA::PCState pc = PCS;
- ''' + code
-
iop = InstObjParams(name, Name, 'Jump', code, inst_flags)
header_output = BasicDeclare.subst(iop)
decoder_output = BasicConstructor.subst(iop)