ref: 53d55013598d7cd214d01cbf0b026844fe7ca8d2
dir: /sys/src/cmd/vi/special.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
#define Extern extern
#include "mips.h"
void Snor(ulong);
void Ssll(ulong);
void Ssra(ulong);
void Sslt(ulong);
void Ssltu(ulong);
void Sand(ulong);
void Saddu(ulong);
void Sadd(ulong);
void Sjr(ulong);
void Sor(ulong);
void Ssubu(ulong);
void Sjalr(ulong);
void Sdivu(ulong);
void Smfhi(ulong);
void Smflo(ulong);
void Sxor(ulong);
void Smult(ulong);
void Smultu(ulong);
void Sdiv(ulong);
void Ssrl(ulong);
void Ssllv(ulong);
void Ssrlv(ulong);
void Ssrav(ulong);
Inst ispec[] =
{
{ Ssll, "sll", Iarith },
{ undef, "" },
{ Ssrl, "srl", Iarith },
{ Ssra, "sra", Iarith },
{ Ssllv, "sllv", Iarith },
{ undef, "" },
{ Ssrlv, "srlv", Iarith },
{ Ssrav, "srav", Iarith },
{ Sjr, "jr", Ibranch },
{ Sjalr, "jalr", Ibranch },
{ undef, "" },
{ undef, "" },
{ Ssyscall, "sysc", Isyscall },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ Smfhi, "mfhi", Ireg },
{ undef, "" },
{ Smflo, "mflo", Ireg },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ Smult, "mult", Iarith },
{ Smultu, "multu" },
{ Sdiv, "div", Iarith },
{ Sdivu, "divu", Iarith },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ Sadd, "add", Iarith },
{ Saddu, "addu", Iarith },
{ undef, "" },
{ Ssubu, "subu", Iarith },
{ Sand, "and", Iarith },
{ Sor, "or", Iarith },
{ Sxor, "xor", Iarith },
{ Snor, "nor", Iarith },
{ undef, "" },
{ undef, "" },
{ Sslt, "slt", Iarith },
{ Ssltu, "sltu", Iarith },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ undef, "" },
{ 0 }
};
void
Ispecial(ulong inst)
{
Inst *i;
i = &ispec[inst&0x3f];
reg.ip = i;
i->count++;
(*i->func)(inst);
}
void
Snor(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("nor\tr%d,r%d,r%d", rd, rs, rt);
if(inst == INOP)
nopcount++;
else
reg.r[rd] = ~(reg.r[rt]|reg.r[rs]);
}
void
Ssll(ulong inst)
{
int rd, rt, shamt;
SpecialGetrtrd(rt, rd, inst);
shamt = (inst>>6)&0x1f;
if(trace)
itrace("sll\tr%d,r%d,%d", rd, rt, shamt);
reg.r[rd] = reg.r[rt]<<shamt;
}
void
Ssllv(ulong inst)
{
int rd, rt, rs;
Get3(rs, rt, rd, inst);
if(trace)
itrace("sllv\tr%d,r%d,r%d", rd, rt, rs);
reg.r[rd] = reg.r[rt]<<(reg.r[rs]&0x1f);
}
void
Ssrlv(ulong inst)
{
int rd, rt, rs;
Get3(rs, rt, rd, inst);
if(trace)
itrace("srlv\tr%d,r%d,r%d", rd, rt, rs);
reg.r[rd] = (ulong)reg.r[rt] >> (reg.r[rs]&0x1f);
}
void
Ssrav(ulong inst)
{
int rd, rt, rs, shamt;
Get3(rs, rt, rd, inst);
if(trace)
itrace("srav\tr%d,r%d,r%d", rd, rt, rs);
shamt = reg.r[rs]&0x1f;
if(shamt != 0 && (reg.r[rt] & SIGNBIT))
reg.r[rd] = reg.r[rt]>>shamt | ~((1<<(32-shamt))-1);
else
reg.r[rd] = reg.r[rt]>>shamt;
}
void
Ssrl(ulong inst)
{
int rd, rt, shamt;
SpecialGetrtrd(rt, rd, inst);
shamt = (inst>>6)&0x1f;
if(trace)
itrace("srl\tr%d,r%d,%d", rd, rt, shamt);
reg.r[rd] = (ulong)reg.r[rt] >> shamt;
}
void
Ssra(ulong inst)
{
int rd, rt, shamt;
SpecialGetrtrd(rt, rd, inst);
shamt = (inst>>6)&0x1f;
if(trace)
itrace("sra\tr%d,r%d,%d", rd, rt, shamt);
if(shamt != 0 && (reg.r[rt] & SIGNBIT))
reg.r[rd] = reg.r[rt]>>shamt | ~((1<<(32-shamt))-1);
else
reg.r[rd] = reg.r[rt]>>shamt;
}
void
Sslt(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("slt\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] < reg.r[rt] ? 1 : 0;
}
void
Ssltu(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("sltu\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = (unsigned)reg.r[rs] < (unsigned)reg.r[rt] ? 1 : 0;
}
void
Sand(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("and\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] & reg.r[rt];
}
void
Saddu(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("addu\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] + reg.r[rt];
}
void
Sadd(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("add\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] + reg.r[rt];
}
void
Ssubu(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("subu\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] - reg.r[rt];
}
void
Sor(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("or\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] | reg.r[rt];
}
void
Sxor(ulong inst)
{
int rs, rt, rd;
Get3(rs, rt, rd, inst);
if(trace)
itrace("or\tr%d,r%d,r%d", rd, rs, rt);
reg.r[rd] = reg.r[rs] ^ reg.r[rt];
}
void
Sjr(ulong inst)
{
ulong npc;
int rs;
Symbol s;
rs = (inst>>21)&0x1f;
npc = reg.r[rs];
if(trace)
itrace("jr\t0x%lux", npc);
/* Do the delay slot */
reg.ir = ifetch(reg.pc+4);
Statbra();
Iexec(reg.ir);
if(calltree) {
if(rs == 31 || rs == 2) {
findsym(npc, CTEXT, &s);
Bprint(bioout, "%8lux return to %lux %s r1=%lux\n",
reg.pc, npc, s.name, reg.r[1]);
}
}
reg.pc = npc-4;
}
void
Sjalr(ulong inst)
{
ulong npc;
int rs, rd;
Symbol s;
rs = (inst>>21)&0x1f;
rd = (inst>>11)&0x1f;
npc = reg.r[rs];
if(trace)
itrace("jalr\tr%d,r%d", rd, rs);
reg.r[rd] = reg.pc+8;
/* Do the delay slot */
reg.ir = ifetch(reg.pc+4);
Statbra();
Iexec(reg.ir);
if(calltree) {
findsym(npc, CTEXT, &s);
if(rs == 31)
Bprint(bioout, "%8lux return to %8lux %s\n",
reg.pc, npc, s.name);
else {
printparams(&s, reg.r[29]);
Bputc(bioout, '\n');
}
}
reg.pc = npc-4;
}
void
Sdivu(ulong inst)
{
int rs, rt;
Getrsrt(rs,rt,inst);
if(trace)
itrace("divu\tr%d,r%d", rs, rt);
reg.mlo = (ulong)reg.r[rs]/(ulong)reg.r[rt];
reg.mhi = (ulong)reg.r[rs]%(ulong)reg.r[rt];
}
void
Sdiv(ulong inst)
{
int rs, rt;
Getrsrt(rs,rt,inst);
if(trace)
itrace("div\tr%d,r%d", rs, rt);
reg.mlo = reg.r[rs]/reg.r[rt];
reg.mhi = reg.r[rs]%reg.r[rt];
}
void
Smfhi(ulong inst)
{
int rd;
rd = (inst>>11)&0x1ff;
if(trace)
itrace("mfhi\tr%d", rd);
reg.r[rd] = reg.mhi;
}
void
Smflo(ulong inst)
{
int rd;
rd = (inst>>11)&0x1ff;
if(trace)
itrace("mflo\tr%d", rd);
reg.r[rd] = reg.mlo;
}
void
Smult(ulong inst)
{
int rs, rt;
Mul m;
Getrsrt(rs,rt,inst);
if(trace)
itrace("mult\tr%d,r%d", rs,rt);
m = mul(reg.r[rs], reg.r[rt]);
reg.mlo = m.lo;
reg.mhi = m.hi;
}
void
Smultu(ulong inst)
{
int rs, rt;
Mulu m;
Getrsrt(rs,rt,inst);
if(trace)
itrace("multu\tr%d,r%d", rs,rt);
m = mulu(reg.r[rs], reg.r[rt]);
reg.mlo = m.lo;
reg.mhi = m.hi;
}