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- This comparison shows the changes necessary to convert path
/or1k/tags/or1k-1_0/or1ksim/cpu/dlx
- from Rev 249 to Rev 1765
- ↔ Reverse comparison
Rev 249 → Rev 1765
/Makefile
0,0 → 1,33
# Makefile -- Makefile for DLX architecture dependent simulation |
# Copyright (C) 1999 Damjan Lampret, lampret@opencores.org |
# |
# This file is part of OpenRISC 1000 Architectural Simulator. |
# |
# This program is free software; you can redistribute it and/or modify |
# it under the terms of the GNU General Public License as published by |
# the Free Software Foundation; either version 2 of the License, or |
# (at your option) any later version. |
# |
# This program is distributed in the hope that it will be useful, |
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
# GNU General Public License for more details. |
# |
# You should have received a copy of the GNU General Public License |
# along with this program; if not, write to the Free Software |
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
# |
ARCH_OBJS = execute.o |
|
all: $(ARCH_OBJS) ../arch.a |
|
../arch.a: $(ARCH_OBJS) Makefile |
$(AR) $(ARFLAGS) $@ $(ARCH_OBJS) |
|
execute.o: execute.c ../common/execute.h ../common/abstract.h ../common/trace.h ../common/stats.h Makefile |
$(CC) $(CCFLAGS) -o $@ $< |
|
clean: |
rm -f *.o *.a |
|
distclean: clean |
/arch.h
0,0 → 1,28
/* arch.h -- DLX architecture specific macros |
Copyright (C) 1999 Damjan Lampret, lampret@opencores.org |
|
This file is part of OpenRISC 1000 Architectural Simulator. |
|
This program is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 2 of the License, or |
(at your option) any later version. |
|
This program is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
|
You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
|
#define LINK_REG "r31" |
#define STACK_REG "r29" |
#define FRAME_REG "r30" |
|
#define MAX_GPRS 32 |
typedef unsigned long machword; |
|
/* Should args be passed on stack */ |
#define STACK_ARGS 1 |
/execute.c
0,0 → 1,730
/* execute.c -- DLX dependent simulation |
Copyright (C) 1999 Damjan Lampret, lampret@opencores.org |
|
This file is part of OpenRISC 1000 Architectural Simulator. |
|
This program is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 2 of the License, or |
(at your option) any later version. |
|
This program is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
|
You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
|
/* Most of the DLX simulation is done in this file. */ |
|
#include <stdlib.h> |
#include <stdio.h> |
#include <string.h> |
|
#include "arch.h" |
|
#include "branch_predict.h" |
#include "abstract.h" |
#include "parse.h" |
#include "trace.h" |
#include "execute.h" |
#include "stats.h" |
|
/* General purpose registers. */ |
machword reg[MAX_GPRS]; |
|
/* Instruction queue */ |
struct iqueue_entry iqueue[20]; |
|
/* Benchmark multi issue execution */ |
int multissue[20]; |
int supercycles; |
|
/* Completition queue */ |
struct icomplet_entry icomplet[20]; |
|
/* Program counter */ |
unsigned long pc; |
|
/* Temporary program counter */ |
unsigned long pctemp; |
|
/* Cycles counts fetch stages */ |
int cycles; |
|
/* Implementation specific. |
Get an actual value of a specific register. */ |
|
machword eval_reg(char *regstr) |
{ |
int regno; |
|
regno = atoi(regstr + 1); |
|
if (regno < MAX_GPRS) |
return reg[regno]; |
else { |
printf("\nEXCEPTION: read out of registers\n"); |
cont_run = 0; |
return 0; |
} |
} |
|
/* Implementation specific. |
Set a specific register with value. */ |
|
void set_reg32(char *regstr, unsigned long value) |
{ |
int regno; |
|
regno = atoi(regstr + 1); |
|
if (regno == 0) /* gpr0 is always zero */ |
value = 0; |
|
if (regno < MAX_GPRS) |
reg[regno] = value; |
else { |
printf("\nEXCEPTION: write out of registers\n"); |
cont_run = 0; |
} |
|
return; |
} |
|
/* Does srcoperand depend on computation of dstoperand? Return |
non-zero if yes. |
|
Cycle t Cycle t+1 |
dst: irrelevant src: immediate always 0 |
dst: reg1 direct src: reg2 direct 0 if reg1 != reg2 |
dst: reg1 disp src: reg2 direct always 0 |
dst: reg1 direct src: reg2 disp 0 if reg1 != reg2 |
dst: reg1 disp src: reg2 disp always 1 (store must |
finish before load) |
*/ |
|
int depend_operands(char *dstoperand, char *srcoperand) |
{ |
char dst[OPERANDNAME_LEN]; |
char src[OPERANDNAME_LEN]; |
|
if (!srcoperand) |
return 0; |
|
if (!dstoperand) |
return 0; |
|
strcpy(dst, dstoperand); |
strcpy(src, srcoperand); |
|
if (*src == '#') /* immediate */ |
return 0; |
else |
if (!strstr(src, "(")) |
if (*src == 'r') { /* src: reg direct */ |
if (!strstr(dst, "(")) |
if (*dst == 'r') |
if (strcmp(dst, src) == 0) |
return 1; /* dst: reg direct */ |
else |
return 0; /* dst: reg direct */ |
else |
return 0; /* dst: addr */ |
else |
return 0; /* dst: reg disp */ |
} else |
return 0; /* src: addr */ |
else { /* src: register disp */ |
char *regstr; |
|
regstr = strstr(src, "(r") + 1; /* regstr == "rXX)" */ |
*strstr(regstr, ")") = '\0'; /* regstr == "rXX" */ |
|
if (!strstr(dst, "(")) |
if (*dst == 'r') |
if (strcmp(dst, regstr) == 0) |
return 1; /* dst: reg direct */ |
else |
return 0; /* dst: reg direct */ |
else |
return 0; /* dst: addr */ |
else |
return 1; /* dst: reg disp */ |
} |
|
return 0; |
} |
|
/* Implementation specific. |
Get an actual value represented by operand (register direct, register |
indirect (with displacement), immediate etc.). |
|
#n - immediate n |
rXX - register direct |
XX - relative or absolute address (labels) |
n(XX) - register indirect (with displacement) */ |
|
machword eval_operand(char *srcoperand) |
{ |
char operand[OPERANDNAME_LEN]; |
|
strcpy(operand, srcoperand); |
|
if (*operand == '#') /* immediate */ |
return strtoul(&operand[1], NULL, 0); |
else |
if (!strstr(operand, "(")) /* not indirect but ...*/ |
if (*operand == 'r') /* ... register direct */ |
return eval_reg(operand); |
|
else /* ... rel. or abs. address */ |
return eval_label(operand); |
else { /* register indirect */ |
int disp; /* with possible displacement */ |
char *regstr; |
unsigned int memaddr; |
|
disp = atoi(operand); /* operand == "nn(rXX)" */ |
regstr = strstr(operand, "(r") + 1; /* regstr == "rXX)" */ |
*strstr(regstr, ")") = '\0'; /* regstr == "rXX" */ |
memaddr = eval_reg(regstr) + disp; |
|
return eval_mem32(memaddr); |
} |
|
return 0; |
} |
|
/* Implementation specific. |
Set destination operand (register direct, register indirect |
(with displacement) with value. */ |
|
void set_operand(char *dstoperand, unsigned long value) |
{ |
char operand[OPERANDNAME_LEN]; |
|
strcpy(operand, dstoperand); |
|
if (*operand == '#') /* immediate */ |
printf("INTERNAL ERROR: Can't set immediate operand.\n"); |
else |
if (!strstr(operand, "(")) /* not indirect but ...*/ |
if (*operand == 'r') /* ... register direct */ |
set_reg32(operand, value); |
else /* ... rel. or abs. address */ |
printf("INTERNAL ERROR: Can't set addr operand.\n"); |
else { /* register indirect */ |
int disp; /* with possible displacement */ |
char *regstr; |
unsigned int memaddr; |
|
disp = atoi(operand); /* operand == "nn(rXX)" */ |
regstr = strstr(operand, "(r") + 1; /* regstr == "rXX)" */ |
*strstr(regstr, ")") = '\0'; /* regstr == "rXX" */ |
memaddr = eval_reg(regstr) + disp; |
|
set_mem32(memaddr, value); |
} |
|
return; |
} |
|
void reset() |
{ |
cycles = 0; |
supercycles = 0; |
memset(reg, 0, sizeof(reg)); |
memset(iqueue, 0, sizeof(iqueue)); |
memset(icomplet, 0, sizeof(icomplet)); |
pctemp = eval_label("_main"); |
pc = pctemp; |
set_reg32(STACK_REG , MEMORY_LEN - STACK_SIZE); |
} |
|
void fetch() |
{ |
/* Cycles after reset. */ |
cycles++; |
|
/* Fetch instruction. */ |
strcpy(iqueue[0].insn, mem[pc].insn); |
strcpy(iqueue[0].op1, mem[pc].op1); |
strcpy(iqueue[0].op2, mem[pc].op2); |
strcpy(iqueue[0].op3, mem[pc].op3); |
iqueue[0].insn_addr = pc; |
iqueue[0].dependdst = NULL; |
iqueue[0].dependsrc1 = NULL; |
iqueue[0].dependsrc2 = NULL; |
|
/* Increment program counter. */ |
pc = pctemp; |
pctemp += 4; |
|
/* Check for breakpoint. */ |
if (mem[pc].brk) |
cont_run = 0; /* Breakpoint set. */ |
|
return; |
} |
|
void decode(struct iqueue_entry *cur) |
{ |
|
cur->dependdst = cur->op1; |
cur->dependsrc1 = cur->op2; /* for calculating register */ |
cur->dependsrc2 = cur->op3; /* dependency */ |
|
cur->func_unit = unknown; |
|
if (strcmp(cur->insn, "sw") == 0) { |
cur->func_unit = store; |
set_operand(cur->op1, eval_operand(cur->op2)); |
} else |
if (strcmp(cur->insn, "sb") == 0) { |
cur->func_unit = store; |
set_operand(cur->op1, (eval_operand(cur->op2) << 24) + (eval_operand(cur->op1) & 0xffffff)); |
} else |
if (strcmp(cur->insn, "sh") == 0) { |
cur->func_unit = store; |
set_operand(cur->op1, (eval_operand(cur->op2) << 16) + (eval_operand(cur->op1) & 0xffff)); |
} else |
if (strcmp(cur->insn, "lw") == 0) { |
cur->func_unit = load; |
set_operand(cur->op1, eval_operand(cur->op2)); |
} else |
if (strcmp(cur->insn, "lb") == 0) { |
signed char temp = (eval_operand(cur->op2) >> 24); |
cur->func_unit = load; |
set_operand(cur->op1, temp); |
} else |
if (strcmp(cur->insn, "lbu") == 0) { |
unsigned char temp = (eval_operand(cur->op2) >> 24); |
cur->func_unit = load; |
set_operand(cur->op1, temp); |
} else |
if (strcmp(cur->insn, "lh") == 0) { |
signed short temp = (eval_operand(cur->op2) >> 16); |
cur->func_unit = load; |
set_operand(cur->op1, temp); |
} else |
if (strcmp(cur->insn, "lhu") == 0) { |
unsigned short temp = (eval_operand(cur->op2) >> 16); |
cur->func_unit = load; |
set_operand(cur->op1, temp); |
} else |
if (strcmp(cur->insn, "lwi") == 0) { |
cur->func_unit = movimm; |
set_operand(cur->op1, eval_operand(cur->op2)); |
} else |
if (strcmp(cur->insn, "lhi") == 0) { |
cur->func_unit = movimm; |
set_operand(cur->op1, eval_operand(cur->op2) << 16); |
} else |
if (strcmp(cur->insn, "and") == 0) { |
cur->func_unit = arith; |
set_operand(cur->op1, eval_operand(cur->op2) & eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "andi") == 0) { |
cur->func_unit = arith; |
set_operand(cur->op1, eval_operand(cur->op2) & eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "or") == 0) { |
cur->func_unit = arith; |
set_operand(cur->op1, eval_operand(cur->op2) | eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "ori") == 0) { |
cur->func_unit = arith; |
set_operand(cur->op1, eval_operand(cur->op2) | eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "xor") == 0) { |
cur->func_unit = arith; |
set_operand(cur->op1, eval_operand(cur->op2) ^ eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "add") == 0) { |
signed long temp3, temp2, temp1; |
signed char temp4; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 + temp3; |
set_operand(cur->op1, temp1); |
|
temp4 = temp1; |
if (temp4 == temp1) |
mstats.byteadd++; |
} else |
if (strcmp(cur->insn, "addi") == 0) { |
signed long temp3, temp2, temp1; |
signed char temp4; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 + temp3; |
set_operand(cur->op1, temp1); |
|
temp4 = temp1; |
if (temp4 == temp1) |
mstats.byteadd++; |
} else |
if (strcmp(cur->insn, "addui") == 0) { |
unsigned long temp3, temp2, temp1; |
unsigned char temp4; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 + temp3; |
set_operand(cur->op1, temp1); |
|
temp4 = temp1; |
if (temp4 == temp1) |
mstats.byteadd++; |
} else |
if (strcmp(cur->insn, "sub") == 0) { |
signed long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 - temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "subui") == 0) { |
unsigned long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 - temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "subi") == 0) { |
signed long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 - temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "mul") == 0) { |
signed long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 * temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "div") == 0) { |
signed long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 / temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "divu") == 0) { |
unsigned long temp3, temp2, temp1; |
|
cur->func_unit = arith; |
temp3 = eval_operand(cur->op3); |
temp2 = eval_operand(cur->op2); |
temp1 = temp2 / temp3; |
set_operand(cur->op1, temp1); |
} else |
if (strcmp(cur->insn, "slli") == 0) { |
cur->func_unit = shift; |
set_operand(cur->op1, eval_operand(cur->op2) << eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "sll") == 0) { |
cur->func_unit = shift; |
set_operand(cur->op1, eval_operand(cur->op2) << eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "srl") == 0) { |
cur->func_unit = shift; |
set_operand(cur->op1, eval_operand(cur->op2) >> eval_operand(cur->op3)); |
} else |
if (strcmp(cur->insn, "srai") == 0) { |
cur->func_unit = shift; |
set_operand(cur->op1, (signed)eval_operand(cur->op2) / (1 << eval_operand(cur->op3))); |
} else |
if (strcmp(cur->insn, "sra") == 0) { |
cur->func_unit = shift; |
set_operand(cur->op1, (signed)eval_operand(cur->op2) / (1 << eval_operand(cur->op3))); |
} else |
if (strcmp(cur->insn, "jal") == 0) { |
cur->func_unit = jump; |
pctemp = eval_operand(cur->op1); |
set_reg32(LINK_REG, pc + 4); |
} else |
if (strcmp(cur->insn, "jr") == 0) { |
cur->func_unit = jump; |
cur->dependsrc1 = cur->op1; |
pctemp = eval_operand(cur->op1); |
} else |
if (strcmp(cur->insn, "j") == 0) { |
cur->func_unit = jump; |
pctemp = eval_operand(cur->op1); |
} else |
if (strcmp(cur->insn, "nop") == 0) { |
cur->func_unit = nop; |
} else |
if (strcmp(cur->insn, "beqz") == 0) { |
cur->func_unit = branch; |
cur->dependsrc1 = cur->op1; |
if (eval_operand(cur->op1) == 0) { |
pctemp = eval_operand(cur->op2); |
mstats.beqz.taken++; |
bpb_update(cur->insn_addr, 1); |
btic_update(pctemp); |
} else { |
mstats.beqz.nottaken++; |
bpb_update(cur->insn_addr, 0); |
btic_update(pc); |
} |
} else |
if (strcmp(cur->insn, "bnez") == 0) { |
cur->func_unit = branch; |
cur->dependsrc1 = cur->op1; |
if (eval_operand(cur->op1) != 0) { |
pctemp = eval_operand(cur->op2); |
mstats.bnez.taken++; |
bpb_update(cur->insn_addr, 1); |
btic_update(pctemp); |
} else { |
mstats.bnez.nottaken++; |
bpb_update(cur->insn_addr, 0); |
btic_update(pc); |
} |
} else |
if (strcmp(cur->insn, "seq") == 0) { |
cur->func_unit = compare; |
if (eval_operand(cur->op2) == eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "snei") == 0) { |
cur->func_unit = compare; |
if (eval_operand(cur->op2) != eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sne") == 0) { |
cur->func_unit = compare; |
if (eval_operand(cur->op2) != eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "seqi") == 0) { |
cur->func_unit = compare; |
if (eval_operand(cur->op2) == eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sgt") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) > |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sgtui") == 0) { |
cur->func_unit = compare; |
if ((unsigned)eval_operand(cur->op2) > |
(unsigned)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sgeui") == 0) { |
cur->func_unit = compare; |
if ((unsigned)eval_operand(cur->op2) >= |
(unsigned)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sgei") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) >= (signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sgti") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) > |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "slt") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) < |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "slti") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) < |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sle") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) <= |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "slei") == 0) { |
cur->func_unit = compare; |
if ((signed)eval_operand(cur->op2) <= |
(signed)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sleui") == 0) { |
cur->func_unit = compare; |
if ((unsigned)eval_operand(cur->op2) <= |
(unsigned)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "sleu") == 0) { |
cur->func_unit = compare; |
if ((unsigned)eval_operand(cur->op2) <= |
(unsigned)eval_operand(cur->op3)) |
set_operand(cur->op1, 1); |
else |
set_operand(cur->op1, 0); |
} else |
if (strcmp(cur->insn, "simrdtsc") == 0) { |
set_operand(cur->op1, supercycles); |
} else |
if (strcmp(cur->insn, "simprintf") == 0) { |
unsigned long stackaddr; |
|
stackaddr = eval_reg(FRAME_REG); |
simprintf(stackaddr, 0); |
/* printf("simprintf %x %x %x\n", stackaddr, fmtaddr, args); */ |
} else { |
printf("\nEXCEPTION: illegal opcode %s ", cur->insn); |
printf("at %.8lx\n", cur->insn_addr); |
cont_run = 0; |
} |
|
/* Dynamic, dependency stats. */ |
adddstats(icomplet[0].insn, iqueue[0].insn, 1, check_depend()); |
|
/* Dynamic, functional units stats. */ |
addfstats(icomplet[0].func_unit, iqueue[0].func_unit, 1, check_depend()); |
|
/* Dynamic, single stats. */ |
addsstats(iqueue[0].insn, 1, 0); |
|
/* Pseudo multiple issue benchmark */ |
if ((multissue[cur->func_unit] == 0) || (check_depend())) { |
int i; |
for (i = 0; i < 20; i++) |
multissue[i] = 1; |
supercycles++; |
multissue[arith] = 2; |
multissue[store] = 2; |
multissue[load] = 2; |
} |
multissue[cur->func_unit]--; |
|
return; |
} |
|
void execute() |
{ |
int i; |
|
/* Here comes real execution someday... */ |
|
/* Instruction waits in completition buffer until retired. */ |
strcpy(icomplet[0].insn, iqueue[0].insn); |
strcpy(icomplet[0].op1, iqueue[0].op1); |
strcpy(icomplet[0].op2, iqueue[0].op2); |
strcpy(icomplet[0].op3, iqueue[0].op3); |
icomplet[0].func_unit = iqueue[0].func_unit; |
icomplet[0].insn_addr = iqueue[0].insn_addr; |
|
if (iqueue[0].dependdst == iqueue[0].op1) |
icomplet[0].dependdst = icomplet[0].op1; |
else |
if (iqueue[0].dependdst == iqueue[0].op2) |
icomplet[0].dependdst = icomplet[0].op2; |
else |
if (iqueue[0].dependdst == iqueue[0].op3) |
icomplet[0].dependdst = icomplet[0].op3; |
else |
icomplet[0].dependdst = NULL; |
|
if (iqueue[0].dependsrc1 == iqueue[0].op1) |
icomplet[0].dependsrc1 = icomplet[0].op1; |
else |
if (iqueue[0].dependsrc1 == iqueue[0].op2) |
icomplet[0].dependsrc1 = icomplet[0].op2; |
else |
if (iqueue[0].dependsrc1 == iqueue[0].op3) |
icomplet[0].dependsrc1 = icomplet[0].op3; |
else |
icomplet[0].dependsrc1 = NULL; |
|
if (iqueue[0].dependsrc2 == iqueue[0].op1) |
icomplet[0].dependsrc2 = icomplet[0].op1; |
else |
if (iqueue[0].dependsrc2 == iqueue[0].op2) |
icomplet[0].dependsrc2 = icomplet[0].op2; |
else |
if (iqueue[0].dependsrc2 == iqueue[0].op3) |
icomplet[0].dependsrc2 = icomplet[0].op3; |
else |
icomplet[0].dependsrc2 = NULL; |
|
/* History of execution */ |
for (i = HISTEXEC_LEN - 1; i; i--) |
histexec[i] = histexec[i - 1]; |
histexec[0] = icomplet[0].insn_addr; /* add last insn */ |
|
return; |
} |
|
void dumpreg() |
{ |
int i; |
|
printf("\n\nIQ[0]:"); |
dumpmemory(iqueue[0].insn_addr, iqueue[0].insn_addr + 4); |
printf(" (just executed)\tCYCLE: %u \tSUPERCYCLE: %u\nPC:", cycles, supercycles); |
dumpmemory(pc, pc + 4); |
printf(" (next insn)"); |
for(i = 0; i < MAX_GPRS; i++) { |
if (i % 4 == 0) |
printf("\n"); |
printf("GPR%.2u: %.8lx ", i, reg[i]); |
} |
} |