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authorGabe Black <gblack@eecs.umich.edu>2007-11-08 18:51:50 -0800
committerGabe Black <gblack@eecs.umich.edu>2007-11-08 18:51:50 -0800
commit46505821ec00cead429af990358d2a4dd28e87b6 (patch)
tree24ea5f9660c92463d6abbffd6aa9ce284714006c /src
parentc01421a82dcbb6b26540461c88a7cae06e38c9c2 (diff)
downloadgem5-46505821ec00cead429af990358d2a4dd28e87b6.tar.xz
ISA parser: Make the isa parser generate MaxInstSrcRegs and MaxInstDestRegs.
--HG-- extra : convert_revision : 8c35891945c6b4ebc320f0c88a7a0449f3c4b4d5
Diffstat (limited to 'src')
-rw-r--r--src/arch/SConscript2
-rw-r--r--src/arch/alpha/isa_traits.hh7
-rwxr-xr-xsrc/arch/isa_parser.py34
-rw-r--r--src/arch/mips/isa_traits.hh7
-rw-r--r--src/arch/sparc/isa_traits.hh7
-rw-r--r--src/arch/x86/isa_traits.hh7
6 files changed, 47 insertions, 17 deletions
diff --git a/src/arch/SConscript b/src/arch/SConscript
index e051c44af..66f93870e 100644
--- a/src/arch/SConscript
+++ b/src/arch/SConscript
@@ -97,7 +97,7 @@ execfile(cpu_models_file.srcnode().abspath)
# Several files are generated from the ISA description.
# We always get the basic decoder and header file.
-isa_desc_gen_files = [ 'decoder.cc', 'decoder.hh' ]
+isa_desc_gen_files = [ 'decoder.cc', 'decoder.hh', 'max_inst_regs.hh' ]
# We also get an execute file for each selected CPU model.
isa_desc_gen_files += [CpuModel.dict[cpu].filename
for cpu in env['CPU_MODELS']]
diff --git a/src/arch/alpha/isa_traits.hh b/src/arch/alpha/isa_traits.hh
index 53eea5f69..be1d1b8bb 100644
--- a/src/arch/alpha/isa_traits.hh
+++ b/src/arch/alpha/isa_traits.hh
@@ -35,6 +35,7 @@
namespace LittleEndianGuest {}
#include "arch/alpha/ipr.hh"
+#include "arch/alpha/max_inst_regs.hh"
#include "arch/alpha/types.hh"
#include "config/full_system.hh"
#include "sim/host.hh"
@@ -44,6 +45,8 @@ class StaticInstPtr;
namespace AlphaISA
{
using namespace LittleEndianGuest;
+ using AlphaISAInst::MaxInstSrcRegs;
+ using AlphaISAInst::MaxInstDestRegs;
// These enumerate all the registers for dependence tracking.
enum DependenceTags {
@@ -144,10 +147,6 @@ namespace AlphaISA
const int TotalDataRegs = NumIntRegs + NumFloatRegs;
- // Static instruction parameters
- const int MaxInstSrcRegs = 3;
- const int MaxInstDestRegs = 2;
-
// semantically meaningful register indices
const int ZeroReg = 31; // architecturally meaningful
// the rest of these depend on the ABI
diff --git a/src/arch/isa_parser.py b/src/arch/isa_parser.py
index fb398d152..25908e986 100755
--- a/src/arch/isa_parser.py
+++ b/src/arch/isa_parser.py
@@ -1573,6 +1573,8 @@ def buildOperandNameMap(userDict, lineno):
global operandsWithExtRE
operandsWithExtRE = re.compile(operandsWithExtREString, re.MULTILINE)
+maxInstSrcRegs = 0
+maxInstDestRegs = 0
class OperandList:
@@ -1636,6 +1638,12 @@ class OperandList:
if self.memOperand:
error(0, "Code block has more than one memory operand.")
self.memOperand = op_desc
+ global maxInstSrcRegs
+ global maxInstDestRegs
+ if maxInstSrcRegs < self.numSrcRegs:
+ maxInstSrcRegs = self.numSrcRegs
+ if maxInstDestRegs < self.numDestRegs:
+ maxInstDestRegs = self.numDestRegs
# now make a final pass to finalize op_desc fields that may depend
# on the register enumeration
for op_desc in self.items:
@@ -1855,6 +1863,22 @@ namespace %(namespace)s {
%(decode_function)s
'''
+max_inst_regs_template = '''
+/*
+ * DO NOT EDIT THIS FILE!!!
+ *
+ * It was automatically generated from the ISA description in %(filename)s
+ */
+
+namespace %(namespace)s {
+
+ const int MaxInstSrcRegs = %(MaxInstSrcRegs)d;
+ const int MaxInstDestRegs = %(MaxInstDestRegs)d;
+
+} // namespace %(namespace)s
+
+'''
+
# Update the output file only if the new contents are different from
# the current contents. Minimizes the files that need to be rebuilt
@@ -1954,6 +1978,16 @@ def parse_isa_desc(isa_desc_file, output_dir):
update_if_needed(output_dir + '/' + cpu.filename,
file_template % vars())
+ # The variable names here are hacky, but this will creat local variables
+ # which will be referenced in vars() which have the value of the globals.
+ global maxInstSrcRegs
+ MaxInstSrcRegs = maxInstSrcRegs
+ global maxInstDestRegs
+ MaxInstDestRegs = maxInstDestRegs
+ # max_inst_regs.hh
+ update_if_needed(output_dir + '/max_inst_regs.hh', \
+ max_inst_regs_template % vars())
+
# global list of CpuModel objects (see cpu_models.py)
cpu_models = []
diff --git a/src/arch/mips/isa_traits.hh b/src/arch/mips/isa_traits.hh
index 5d4403553..cc584faa8 100644
--- a/src/arch/mips/isa_traits.hh
+++ b/src/arch/mips/isa_traits.hh
@@ -32,6 +32,7 @@
#ifndef __ARCH_MIPS_ISA_TRAITS_HH__
#define __ARCH_MIPS_ISA_TRAITS_HH__
+#include "arch/mips/max_inst_regs.hh"
#include "arch/mips/types.hh"
#include "sim/host.hh"
@@ -44,6 +45,8 @@ class StaticInstPtr;
namespace MipsISA
{
using namespace LittleEndianGuest;
+ using MipsISAInst::MaxInstSrcRegs;
+ using MipsISAInst::MaxInstDestRegs;
StaticInstPtr decodeInst(ExtMachInst);
@@ -64,10 +67,6 @@ namespace MipsISA
const int NumFloatArchRegs = 32;
const int NumFloatSpecialRegs = 5;
- // Static instruction parameters
- const int MaxInstSrcRegs = 5;
- const int MaxInstDestRegs = 4;
-
// semantically meaningful register indices
const int ZeroReg = 0;
const int AssemblerReg = 1;
diff --git a/src/arch/sparc/isa_traits.hh b/src/arch/sparc/isa_traits.hh
index 4f3d20606..133817eb5 100644
--- a/src/arch/sparc/isa_traits.hh
+++ b/src/arch/sparc/isa_traits.hh
@@ -33,6 +33,7 @@
#define __ARCH_SPARC_ISA_TRAITS_HH__
#include "arch/sparc/types.hh"
+#include "arch/sparc/max_inst_regs.hh"
#include "arch/sparc/sparc_traits.hh"
#include "config/full_system.hh"
#include "sim/host.hh"
@@ -49,6 +50,8 @@ namespace SparcISA
//This makes sure the big endian versions of certain functions are used.
using namespace BigEndianGuest;
+ using SparcISAInst::MaxInstSrcRegs;
+ using SparcISAInst::MaxInstDestRegs;
// SPARC has a delay slot
#define ISA_HAS_DELAY_SLOT 1
@@ -76,10 +79,6 @@ namespace SparcISA
// Some OS syscall use a second register (o1) to return a second value
const int SyscallPseudoReturnReg = ArgumentReg[1];
- //XXX These numbers are bogus
- const int MaxInstSrcRegs = 8;
- const int MaxInstDestRegs = 9;
-
//8K. This value is implmentation specific; and should probably
//be somewhere else.
const int LogVMPageSize = 13;
diff --git a/src/arch/x86/isa_traits.hh b/src/arch/x86/isa_traits.hh
index 762f9b172..abb7694ed 100644
--- a/src/arch/x86/isa_traits.hh
+++ b/src/arch/x86/isa_traits.hh
@@ -59,6 +59,7 @@
#define __ARCH_X86_ISATRAITS_HH__
#include "arch/x86/intregs.hh"
+#include "arch/x86/max_inst_regs.hh"
#include "arch/x86/types.hh"
#include "arch/x86/x86_traits.hh"
#include "sim/host.hh"
@@ -72,6 +73,8 @@ namespace X86ISA
//This makes sure the little endian version of certain functions
//are used.
using namespace LittleEndianGuest;
+ using X86ISAInst::MaxInstSrcRegs;
+ using X86ISAInst::MaxInstDestRegs;
// X86 does not have a delay slot
#define ISA_HAS_DELAY_SLOT 0
@@ -121,10 +124,6 @@ namespace X86ISA
// value
const int SyscallPseudoReturnReg = INTREG_RDX;
- //XXX These numbers are bogus
- const int MaxInstSrcRegs = 10;
- const int MaxInstDestRegs = 10;
-
//4k. This value is not constant on x86.
const int LogVMPageSize = 12;
const int VMPageSize = (1 << LogVMPageSize);