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authorGabe Black <gblack@eecs.umich.edu>2007-04-06 16:39:47 +0000
committerGabe Black <gblack@eecs.umich.edu>2007-04-06 16:39:47 +0000
commita3ed19f82a34626231ae7b5a024331b24645c01c (patch)
treee5b0f9ce26c276998f64dd4d66aa6d81d5fb466c /src/arch/x86/isa/microasm.isa
parent3c9768e6448b72689e9edb250dd0ee3e5eadb9d7 (diff)
parent59df95c7e6e5d1e0bee48946aea08e436785b298 (diff)
downloadgem5-a3ed19f82a34626231ae7b5a024331b24645c01c.tar.xz
Merge zizzer.eecs.umich.edu:/bk/newmem
into ahchoo.blinky.homelinux.org:/home/gblack/m5/newmem-x86 --HG-- extra : convert_revision : 8e624bb95cb9f478ca7ac1dbbd64e20674e3e224
Diffstat (limited to 'src/arch/x86/isa/microasm.isa')
-rw-r--r--src/arch/x86/isa/microasm.isa68
1 files changed, 29 insertions, 39 deletions
diff --git a/src/arch/x86/isa/microasm.isa b/src/arch/x86/isa/microasm.isa
index b94b55aab..d3ced71be 100644
--- a/src/arch/x86/isa/microasm.isa
+++ b/src/arch/x86/isa/microasm.isa
@@ -62,23 +62,6 @@
//
let {{
- # This builds either a regular or macro op to implement the sequence of
- # ops we give it.
- def genInst(name, Name, ops):
- # If we can implement this instruction with exactly one microop, just
- # use that directly.
- newStmnt = ''
- if len(ops) == 1:
- decode_block = "return (X86StaticInst *)(%s);" % \
- ops[0].getAllocator()
- return ('', '', decode_block, '')
- else:
- # Build a macroop to contain the sequence of microops we've
- # been given.
- return genMacroOp(name, Name, ops)
-}};
-
-let {{
# This code builds up a decode block which decodes based on switchval.
# vals is a dict which matches case values with what should be decoded to.
# builder is called on the exploded contents of "vals" values to generate
@@ -187,14 +170,8 @@ let {{
# At this point, we've built up "code" to have all the necessary extra
# instructions needed to implement whatever types of operands were
- # specified. Now we'll assemble it it into a microOp sequence.
- ops = assembleMicro(code)
-
- # Build a macroop to contain the sequence of microops we've
- # constructed. The decode block will be used to fill in our
- # inner decode structure, and the rest will be concatenated and
- # passed back.
- return genInst(name, Name, ops)
+ # specified. Now we'll assemble it it into a StaticInst.
+ return assembleMicro(name, Name, code)
}};
////////////////////////////////////////////////////////////////////
@@ -203,6 +180,13 @@ let {{
//
let {{
+ # These are used when setting up microops so that they can specialize their
+ # base class template properly.
+ RegOpType = "RegisterOperand"
+ ImmOpType = "ImmediateOperand"
+}};
+
+let {{
class MicroOpStatement(object):
def __init__(self):
self.className = ''
@@ -242,19 +226,9 @@ let {{
return 'new %s%s(machInst%s%s)' % (self.className, signature, self.microFlagsText(microFlags), args)
}};
-let {{
- def buildLabelDict(ops):
- labels = {}
- micropc = 0
- for op in ops:
- if op.label:
- labels[op.label] = count
- micropc += 1
- return labels
-}};
-
let{{
- def assembleMicro(code):
+ def assembleMicro(name, Name, code):
+
# This function takes in a block of microcode assembly and returns
# a python list of objects which describe it.
@@ -341,7 +315,13 @@ let{{
lineMatch = lineRe.search(code)
# Decode the labels into displacements
- labels = buildLabelDict(statements)
+
+ labels = {}
+ micropc = 0
+ for statement in statements:
+ if statement.label:
+ labels[statement.label] = count
+ micropc += 1
micropc = 0
for statement in statements:
for arg in statement.args:
@@ -353,5 +333,15 @@ let{{
# micropc + 1 + displacement.
arg["operandImm"] = labels[arg["operandLabel"]] - micropc - 1
micropc += 1
- return statements
+
+ # If we can implement this instruction with exactly one microop, just
+ # use that directly.
+ if len(statements) == 1:
+ decode_block = "return %s;" % \
+ statements[0].getAllocator()
+ return ('', '', decode_block, '')
+ else:
+ # Build a macroop to contain the sequence of microops we've
+ # been given.
+ return genMacroOp(name, Name, statements)
}};