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mips_isa.ac
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mips_isa.ac
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/**
* @file mips_isa.ac
* @author Sandro Rigo
* Marcus Bartholomeu
* Alexandro Baldassin (acasm information)
*
* The ArchC Team
* http://www.archc.org/
*
* Computer Systems Laboratory (LSC)
* IC-UNICAMP
* http://www.lsc.ic.unicamp.br/
*
* @version 1.0
* @date Thu, 29 Jun 2006 14:49:08 -0300
*
* @brief The ArchC MIPS-I functional model.
*
* @attention Copyright (C) 2002-2006 --- The ArchC Team
*
*/
AC_ISA(mips){
ac_format Type_R = "%op:6 %rs:5 %rt:5 %rd:5 %shamt:5 %func:6";
ac_format Type_I = "%op:6 %rs:5 %rt:5 %imm:16:s";
ac_format Type_J = "%op:6 %addr:26";
ac_instr<Type_I> lb, lbu, lh, lhu, lw, lwl, lwr;
ac_instr<Type_I> sb, sh, sw, swl, swr;
ac_instr<Type_I> addi, addiu, slti, sltiu, andi, ori, xori, lui;
ac_instr<Type_R> add, addu, sub, subu, slt, sltu;
ac_instr<Type_R> instr_and, instr_or, instr_xor, instr_nor;
ac_instr<Type_R> nop, sll, srl, sra, sllv, srlv, srav;
ac_instr<Type_R> mult, multu, div, divu;
ac_instr<Type_R> mfhi, mthi, mflo, mtlo;
ac_instr<Type_J> j, jal;
ac_instr<Type_R> jr, jalr;
ac_instr<Type_I> beq, bne, blez, bgtz, bltz, bgez, bltzal, bgezal;
ac_instr<Type_R> sys_call, instr_break;
// gas MIPS specific register names
ac_asm_map reg {
"$"[0..31] = [0..31];
"$zero" = 0;
"$at" = 1;
"$kt"[0..1] = [26..27];
"$gp" = 28;
"$sp" = 29;
"$fp" = 30;
"$ra" = 31;
}
ISA_CTOR(mips){
lb.set_asm("lb %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lb.set_asm("lb %reg, (%reg)", rt, rs, imm=0);
lb.set_asm("lb %reg, %imm (%reg)", rt, imm, rs);
lb.set_decoder(op=0x20);
lbu.set_asm("lbu %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lbu.set_asm("lbu %reg, (%reg)", rt, rs, imm=0);
lbu.set_asm("lbu %reg, %imm (%reg)", rt, imm, rs);
lbu.set_decoder(op=0x24);
lh.set_asm("lh %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lh.set_asm("lh %reg, (%reg)", rt, rs, imm=0);
lh.set_asm("lh %reg, %imm (%reg)", rt, imm, rs);
lh.set_decoder(op=0x21);
lhu.set_asm("lhu %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lhu.set_asm("lhu %reg, (%reg)", rt, rs, imm=0);
lhu.set_asm("lhu %reg, %imm (%reg)", rt, imm, rs);
lhu.set_decoder(op=0x25);
lw.set_asm("lw %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lw.set_asm("lw %reg, (%reg)", rt, rs, imm=0);
lw.set_asm("lw %reg, %imm (%reg)", rt, imm, rs);
lw.set_decoder(op=0x23);
lwl.set_asm("lwl %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lwl.set_asm("lwl %reg, (%reg)", rt, rs, imm=0);
lwl.set_asm("lwl %reg, %imm (%reg)", rt, imm, rs);
lwl.set_decoder(op=0x22);
lwr.set_asm("lwr %reg, \%lo(%exp)(%reg)", rt, imm, rs);
lwr.set_asm("lwr %reg, (%reg)", rt, rs, imm=0);
lwr.set_asm("lwr %reg, %imm (%reg)", rt, imm, rs);
lwr.set_decoder(op=0x26);
sb.set_asm("sb %reg, \%lo(%exp)(%reg)", rt, imm, rs);
sb.set_asm("sb %reg, (%reg)", rt, rs, imm=0);
sb.set_asm("sb %reg, %imm (%reg)", rt, imm, rs);
sb.set_decoder(op=0x28);
sh.set_asm("sh %reg, \%lo(%exp)(%reg)", rt, imm, rs);
sh.set_asm("sh %reg, (%reg)", rt, rs, imm=0);
sh.set_asm("sh %reg, %imm (%reg)", rt, imm, rs);
sh.set_decoder(op=0x29);
sw.set_asm("sw %reg, \%lo(%exp)(%reg)", rt, imm, rs);
sw.set_asm("sw %reg, (%reg)", rt, rs, imm=0);
sw.set_asm("sw %reg, %imm (%reg)", rt, imm, rs);
sw.set_decoder(op=0x2B);
swl.set_asm("swl %reg, (%reg)", rt, rs, imm=0);
swl.set_asm("swl %reg, %imm (%reg)", rt, imm, rs);
swl.set_decoder(op=0x2A);
swr.set_asm("swr %reg, (%reg)", rt, rs, imm=0);
swr.set_asm("swr %reg, %imm (%reg)", rt, imm, rs);
swr.set_decoder(op=0x2E);
addi.set_asm("addi %reg, %reg, %exp", rt, rs, imm);
addi.set_asm("add %reg, %reg, %exp", rt, rs, imm);
addi.set_asm("add %reg, $0, %exp", rt, imm, rs=0);
addi.set_decoder(op=0x08);
addi.set_cycles(4);
addiu.set_asm("addiu %reg, %reg, %exp", rt, rs, imm);
addiu.set_asm("addiu %reg, %reg, \%lo(%exp)", rt, rs, imm);
addiu.set_asm("addu %reg, %reg, %exp", rt, rs, imm);
addiu.set_decoder(op=0x09);
slti.set_asm("slti %reg, %reg, %exp", rt, rs, imm);
slti.set_asm("slt %reg, %reg, %exp", rt, rs, imm);
slti.set_decoder(op=0x0A);
sltiu.set_asm("sltiu %reg, %reg, %exp", rt, rs, imm);
sltiu.set_asm("sltu %reg, %reg, %exp", rt, rs, imm);
sltiu.set_decoder(op=0x0B);
andi.set_asm("andi %reg, %reg, %imm", rt, rs, imm);
andi.set_asm("and %reg, %reg, %imm", rt, rs, imm);
andi.set_decoder(op=0x0C);
andi.set_cycles(1);
ori.set_asm("ori %reg, %reg, %imm", rt, rs, imm);
ori.set_asm("or %reg, %reg, %imm", rt, rs, imm);
ori.set_decoder(op=0x0D);
ori.set_cycles(1);
xori.set_asm("xori %reg, %reg, %imm", rt, rs, imm);
xori.set_asm("xor %reg, %reg, %imm", rt, rs, imm);
xori.set_decoder(op=0x0E);
ori.set_cycles(1);
lui.set_asm("lui %reg, %exp", rt, imm);
lui.set_asm("lui %reg, \%hi(%imm(carry))", rt, imm);
lui.set_asm("lui %reg, \%hi(%exp(carry))", rt, imm);
lui.set_decoder(op=0x0F, rs=0x00);
lui.set_cycles(1);
add.set_asm("add %reg, %reg, %reg", rd, rs, rt);
add.set_decoder(op=0x00, func=0x20);
add.set_cycles(4);
addu.set_asm("addu %reg, %reg, %reg", rd, rs, rt);
addu.set_asm("move %reg, %reg", rd, rs, rt="$zero");
addu.set_decoder(op=0x00, func=0x21);
addu.set_cycles(4);
sub.set_asm("sub %reg, %reg, %reg", rd, rs, rt);
sub.set_decoder(op=0x00, func=0x22);
sub.set_cycles(4);
subu.set_asm("subu %reg, %reg, %reg", rd, rs, rt);
subu.set_decoder(op=0x00, func=0x23);
subu.set_cycles(4);
slt.set_asm("slt %reg, %reg, %reg", rd, rs, rt);
slt.set_decoder(op=0x00, func=0x2A);
slt.set_cycles(1);
sltu.set_asm("sltu %reg, %reg, %reg", rd, rs, rt);
sltu.set_decoder(op=0x00, func=0x2B);
slt.set_cycles(1);
instr_and.set_asm("and %reg, %reg, %reg", rd, rs, rt);
instr_and.set_decoder(op=0x00, func=0x24);
instr_or.set_asm("or %reg, %reg, %reg", rd, rs, rt);
instr_or.set_decoder(op=0x00, func=0x25);
instr_xor.set_asm("xor %reg, %reg, %reg", rd, rs, rt);
instr_xor.set_decoder(op=0x00, func=0x26);
instr_nor.set_asm("nor %reg, %reg, %reg", rd, rs, rt);
instr_nor.set_decoder(op=0x00, func=0x27);
nop.set_asm("nop", rs=0, rt=0, shamt=0);
nop.set_decoder(op=0x00, rd=0x00, func=0x00);
sll.set_asm("sll %reg, %reg, %imm", rd, rt, shamt);
sll.set_decoder(op=0x00, func= 0x00);
sll.set_cycles(1);
srl.set_asm("srl %reg, %reg, %imm", rd, rt, shamt);
srl.set_decoder(op=0x00, func= 0x02);
sll.set_cycles(1);
sra.set_asm("sra %reg, %reg, %imm", rd, rt, shamt);
sra.set_decoder(op=0x00, func= 0x03);
sll.set_cycles(1);
sllv.set_asm("sllv %reg, %reg, %reg", rd, rt, rs);
sllv.set_asm("sll %reg, %reg, %reg", rd, rt, rs); // gas
sllv.set_decoder(op=0x00, func= 0x04);
sllv.set_cycles(1);
srlv.set_asm("srlv %reg, %reg, %reg", rd, rt, rs);
srlv.set_asm("srl %reg, %reg, %reg", rd, rt, rs); // gas
srlv.set_decoder(op=0x00, func= 0x06);
srlv.set_cycles(1);
srav.set_asm("srav %reg, %reg, %reg", rd, rt, rs);
srav.set_asm("sra %reg, %reg, %reg", rd, rt, rs); // gas
srav.set_decoder(op=0x00, func= 0x07);
srlv.set_cycles(1);
mult.set_asm("mult %reg, %reg", rs, rt);
mult.set_decoder(op=0x00, func=0x18);
mult.set_cycles(4);
multu.set_asm("multu %reg, %reg", rs, rt);
multu.set_decoder(op=0x00, func=0x19);
multu.set_cycles(4);
div.set_asm("div %reg, %reg", rs, rt);
div.set_decoder(op=0x00, func=0x1A);
div.set_cycles(30);//media
divu.set_asm("divu %reg, %reg", rs, rt);
divu.set_decoder(op=0x00, func=0x1B);
divu.set_cycles(30);//media
mfhi.set_asm("mfhi %reg", rd);
mfhi.set_decoder(op=0x00, func=0x10);
mthi.set_asm("mthi %reg", rs);
mthi.set_decoder(op=0x00, func=0x11);
mflo.set_asm("mflo %reg", rd);
mflo.set_decoder(op=0x00, func=0x12);
mtlo.set_asm("mtlo %reg", rs);
mtlo.set_decoder(op=0x00, func=0x13);
j.set_asm("j %exp(align)", addr);
j.set_decoder(op=0x02);
jal.set_asm("jal %exp(align)", addr);
jal.set_asm("jal %exp(align)", addr); //compiler_info related
jal.set_decoder(op=0x03);
jr.set_asm("jr %reg", rs);
jr.set_asm("j %reg", rs);
jr.set_asm("ret", rs = "$ra");
jr.set_decoder(op=0x00, func= 0x08);
jalr.set_asm("jalr %reg, %reg", rd, rs);
jalr.set_asm("jalr %reg", rs, rd="$ra");
jalr.set_asm("jal %reg", rs, rd="$ra"); // gas
jalr.set_decoder(op=0x00, func= 0x09);
beq.set_asm("beq %reg, %reg, %exp(pcrel)", rs, rt, imm);
beq.set_asm("b %exp(pcrel)", imm, rs=0, rt=0); // gas
beq.set_asm("beqz %reg, %exp(pcrel)", rs, imm, rt=0); // gas
beq.set_decoder(op=0x04);
bne.set_asm("bgtu %reg, $0, %exp(pcrel)", rs, imm, rt=0x00); // bgtu with second operand fixed in 0
bne.set_asm("bne %reg, %reg, %exp(pcrel)", rs, rt, imm);
bne.set_asm("bnez %reg, %exp(pcrel)", rs, imm, rt=0);
bne.set_decoder(op=0x05);
blez.set_asm("blez %reg, %exp(pcrel)", rs, imm);
blez.set_decoder(op=0x06, rt=0x00);
bgtz.set_asm("bgtz %reg, %exp(pcrel)", rs, imm);
bgtz.set_decoder(op=0x07, rt=0x00);
bltz.set_asm("bltz %reg, %exp(pcrel)", rs, imm);
bltz.set_decoder(op=0x01, rt=0x00);
bgez.set_asm("bgez %reg, %exp(pcrel)", rs, imm);
bgez.set_decoder(op=0x01, rt=0x01);
bltzal.set_asm("bltzal %reg, %exp(pcrel)", rs, imm);
bltzal.set_decoder(op=0x01, rt=0x10);
bgezal.set_asm("bgezal %reg, %exp(pcrel)", rs, imm);
bgezal.set_decoder(op=0x01, rt=0x11);
sys_call.set_asm("syscall");
sys_call.set_decoder(op=0x00, func=0x0C);
instr_break.set_asm("break", rt=0);
instr_break.set_asm("break %imm", rt);
instr_break.set_decoder(op=0x00, func=0x0D);
pseudo_instr("li %reg, %imm") {
"lui %0, \%hi(%1)";
"ori %0, %0, %1";
}
pseudo_instr("la %reg, %addr") {
"lui %0, \%hi(%1)";
"addiu %0, %0, \%lo(%1)";
}
pseudo_instr("sw %reg, %exp") {
"lui $at, \%hi(%1)";
"sw %0, \%lo(%1)($at)";
}
pseudo_instr("lw %reg, %exp") {
"lui %0, \%hi(%1)";
"lw %0, \%lo(%1)(%0)";
}
pseudo_instr("subu %reg, %reg, %imm") {
"addiu %0, %1, -%2";
}
pseudo_instr("ble %reg, %reg, %exp") {
"slt $at, %1, %0";
"beq $at, $zero, %2";
}
pseudo_instr("ble %reg, %imm, %exp") {
"slti $at, %0, %1+1";
"bne $at, $zero, %2";
}
pseudo_instr("mul %reg, %reg, %reg") {
"multu %1, %2";
"mflo %0";
}
pseudo_instr("bge %reg, %reg, %exp") {
"slt $at, %0, %1";
"beq $at, $zero, %2";
}
pseudo_instr("bgt %reg, %imm, %exp") {
"slti $at, %0, %1+1";
"beq $at, $zero, %2";
}
pseudo_instr("mul %reg, %reg, %imm") {
"addiu $at, $zero, %2";
"mult %1, $at";
"mflo %0";
}
pseudo_instr("lw %reg, %exp (%reg)") {
/* this should be 'li %0, %1', but 'li' is a conditional pseudo in gas :/
- this only works when %exp < 2^16-1 - should be enough for validation */
"lui %0, %1";
"addu %0, %0, %2";
"lw %0, (%0)";
}
pseudo_instr("sw %reg, %exp (%reg)") {
/* this should be 'li %0, %1', but 'li' is a conditional pseudo in gas :/
- this only works when %exp < 2^16-1 - should be enough for validation */
"lui $at, %1";
"addu $at, $at, %2";
"sw %0, ($at)";
}
pseudo_instr("bne %reg, %imm, %exp") {
"addiu $at, $zero, %1";
"bne %0, $at, %2";
}
/*******************************************************/
/* Optional properties to optimize compiled simulation */
/*******************************************************/
j.is_jump(((ac_pc+4) & 0xF0000000) | (addr<<2));
j.delay(1);
jal.is_jump(((ac_pc+4) & 0xF0000000) | (addr<<2));
jal.delay(1);
jal.behavior(RB[31] = (ac_pc+4)+4;);
jr.is_jump(RB[rs]);
jr.delay(1);
jalr.is_jump(RB[rs]);
jalr.delay(1);
jalr.behavior(RB[(rd==0)?31:rd] = (ac_pc+4)+4;);
beq.is_branch((ac_pc+4) + (imm<<2));
beq.cond(RB[rs] == RB[rt]);
beq.delay(1);
bne.is_branch((ac_pc+4) + (imm<<2));
bne.cond(RB[rs] != RB[rt]);
bne.delay(1);
blez.is_branch((ac_pc+4) + (imm<<2));
blez.cond((RB[rs] == 0 ) || (RB[rs]&0x80000000 ));
blez.delay(1);
bgtz.is_branch((ac_pc+4) + (imm<<2));
bgtz.cond(!(RB[rs] & 0x80000000) && (RB[rs]!=0));
bgtz.delay(1);
bltz.is_branch((ac_pc+4) + (imm<<2));
bltz.cond(RB[rs] & 0x80000000);
bltz.delay(1);
bgez.is_branch((ac_pc+4) + (imm<<2));
bgez.cond(!(RB[rs] & 0x80000000));
bgez.delay(1);
bltzal.is_branch((ac_pc+4) + (imm<<2));
bltzal.cond(RB[rs] & 0x80000000);
bltzal.delay(1);
bgezal.is_branch((ac_pc+4) + (imm<<2));
bgezal.cond(!(RB[rs] & 0x80000000));
bgezal.delay(1);
};
};