ref: c3ba64f6935322f09b6de5c2285544fd471c605d
dir: /sys/src/cmd/ki/float.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
#define Extern extern
#include "sparc.h"
void
ldf(ulong ir)
{
ulong ea;
int rd, rs1, rs2;
getrop23(ir);
if(ir&IMMBIT) {
ximm(ea, ir);
if(trace)
itrace("ldf\tf%d,0x%lux(r%d) ea=%lux",rd, ea, rs1, ea+reg.r[rs1]);
ea += reg.r[rs1];
}
else {
ea = reg.r[rs1] + reg.r[rs2];
if(trace)
itrace("ldf\tf%d,[r%d+r%d] ea=%lux", rd, rs1, rs2, ea);
}
reg.di[rd] = getmem_w(ea);
}
void
lddf(ulong ir)
{
ulong ea;
int rd, rs1, rs2;
getrop23(ir);
if(ir&IMMBIT) {
ximm(ea, ir);
if(trace)
itrace("lddf\tf%d,0x%lux(r%d) ea=%lux",
rd, ea, rs1, ea+reg.r[rs1]);
ea += reg.r[rs1];
}
else {
ea = reg.r[rs1] + reg.r[rs2];
if(trace)
itrace("lddf\tf%d,[r%d+r%d] ea=%lux", rd, rs1, rs2, ea);
}
if(ea&7) {
Bprint(bioout, "mem_address_not_aligned [load addr %.8lux]\n", ea);
longjmp(errjmp, 0);
}
if(rd&1)
undef(ir);
reg.di[rd] = getmem_w(ea);
reg.di[rd+1] = getmem_w(ea+4);
}
void
stf(ulong ir)
{
ulong ea;
int rd, rs1, rs2;
getrop23(ir);
if(ir&IMMBIT) {
ximm(ea, ir);
if(trace)
itrace("stf\tf%d,0x%lux(r%d) %lux=%g",
rd, ea, rs1, ea+reg.r[rs1], reg.fl[rd]);
ea += reg.r[rs1];
}
else {
ea = reg.r[rs1] + reg.r[rs2];
if(trace)
itrace("stf\tf%d,[r%d+r%d] %lux=%lux",
rd, rs1, rs2, ea, reg.r[rd]);
}
putmem_w(ea, reg.di[rd]);
}
void
stdf(ulong ir)
{
ulong ea;
int rd, rs1, rs2;
getrop23(ir);
if(ir&IMMBIT) {
ximm(ea, ir);
if(trace)
itrace("stdf\tf%d,0x%lux(r%d) %lux=%g",
rd, ea, rs1, ea+reg.r[rs1], reg.fl[rd]);
ea += reg.r[rs1];
}
else {
ea = reg.r[rs1] + reg.r[rs2];
if(trace)
itrace("stdf\tf%d,[r%d+r%d] %lux=%lux",
rd, rs1, rs2, ea, reg.r[rd]);
}
if(ea&7) {
Bprint(bioout, "mem_address_not_aligned [store addr %.8lux]\n", ea);
longjmp(errjmp, 0);
}
if(rd&1)
undef(ir);
putmem_w(ea, reg.di[rd]);
putmem_w(ea+4, reg.di[rd+1]);
}
void
fcmp(ulong ir)
{
int fc, rd, rs1, rs2;
getrop23(ir);
USED(rd);
SET(fc);
switch((ir>>5)&0x1FF) {
default:
undef(ir);
case 0x51: /* fcmps */
if(trace)
itrace("fcmps\tf%d,f%d", rs1, rs2);
if(isNaN(reg.fl[rs1]) || isNaN(reg.fl[rs2])) {
fc = 3;
break;
}
if(reg.fl[rs1] == reg.fl[rs2]) {
fc = 0;
break;
}
if(reg.fl[rs1] < reg.fl[rs2]) {
fc = 1;
break;
}
if(reg.fl[rs1] > reg.fl[rs2]) {
fc = 2;
break;
}
print("ki: fcmp error\n");
break;
case 0x52:
if(trace)
itrace("fcmpd\tf%d,f%d", rs1, rs2);
rs1 >>= 1;
rs2 >>= 1;
if(isNaN(reg.fd[rs1]) || isNaN(reg.fd[rs2])) {
fc = 3;
break;
}
if(reg.fd[rs1] == reg.fd[rs2]) {
fc = 0;
break;
}
if(reg.fd[rs1] < reg.fd[rs2]) {
fc = 1;
break;
}
if(reg.fd[rs1] > reg.fd[rs2]) {
fc = 2;
break;
}
print("ki: fcmp error\n");
break;
case 0x55: /* fcmpes */
if(trace)
itrace("fcmpes\tf%d,f%d", rs1, rs2);
rs1 >>= 1;
rs2 >>= 2;
if(isNaN(reg.fl[rs1]) || isNaN(reg.fl[rs2])) {
Bprint(bioout, "invalid_fp_register\n");
longjmp(errjmp, 0);
}
if(reg.fl[rs1] == reg.fl[rs2]) {
fc = 0;
break;
}
if(reg.fl[rs1] < reg.fl[rs2]) {
fc = 1;
break;
}
if(reg.fl[rs1] > reg.fl[rs2]) {
fc = 2;
break;
}
print("ki: fcmp error\n");
break;
case 0x56:
if(trace)
itrace("fcmped\tf%d,f%d", rs1, rs2);
if(isNaN(reg.fd[rs1]) || isNaN(reg.fd[rs2])) {
Bprint(bioout, "invalid_fp_register\n");
longjmp(errjmp, 0);
}
if(reg.fd[rs1] == reg.fd[rs2]) {
fc = 0;
break;
}
if(reg.fd[rs1] < reg.fd[rs2]) {
fc = 1;
break;
}
if(reg.fd[rs1] > reg.fd[rs2]) {
fc = 2;
break;
}
print("ki: fcmp error\n");
break;
}
reg.fpsr = (reg.fpsr&~(0x3<<10)) | (fc<<10);
}
void
fbcc(ulong ir)
{
char *op;
ulong npc;
int takeit, fc, ba, anul;
fc = (reg.fpsr>>10)&3;
ba = 0;
SET(op, takeit);
switch((ir>>25)&0x0F) {
case 0:
op = "fbn";
takeit = 0;
break;
case 1:
op = "fbne";
takeit = fc == FP_L || fc == FP_G || fc == FP_U;
break;
case 2:
op = "fblg";
takeit = fc == FP_L || fc == FP_G;
break;
case 3:
op = "fbul";
takeit = fc == FP_L || fc == FP_U;
break;
case 4:
op = "fbl";
takeit = fc == FP_L;
break;
case 5:
op = "fbug";
takeit = fc == FP_U || fc == FP_G;
break;
case 6:
op = "fbg";
takeit = fc == FP_G;
break;
case 7:
op = "fbu";
takeit = fc == FP_U;
break;
case 8:
op = "fba";
ba = 1;
takeit = 1;
break;
case 9:
op = "fbe";
takeit = fc == FP_E;
break;
case 10:
op = "fbue";
takeit = fc == FP_E || fc == FP_U;
break;
case 11:
op = "fbge";
takeit = fc == FP_E || fc == FP_G;
break;
case 12:
op = "fbuge";
takeit = fc == FP_E || fc == FP_G || fc == FP_U;
break;
case 13:
op = "fble";
takeit = fc == FP_E || fc == FP_L;
break;
case 14:
op = "fbule";
takeit = fc == FP_E || fc == FP_L || fc == FP_U;
break;
case 15:
op = "fbo";
takeit = fc == FP_E || fc == FP_L || fc == FP_G;
break;
}
npc = ir & 0x3FFFFF;
if(npc & (1<<21))
npc |= ~((1<<22)-1);
npc = (npc<<2) + reg.pc;
anul = ir&ANUL;
if(trace) {
if(anul)
itrace("%s,a\t%lux", op, npc);
else
itrace("%s\t%lux", op, npc);
}
if(takeit == 0) {
reg.pc += 4;
if(anul == 0) {
reg.ir = ifetch(reg.pc);
delay(reg.pc+4);
}
else
anulled++;
return;
}
ci->taken++;
if(ba && anul) {
reg.pc = npc-4;
anulled++;
return;
}
reg.ir = ifetch(reg.pc+4);
delay(npc);
reg.pc = npc-4;
}
void
farith(ulong ir)
{
char *op;
long v;
int rd, rs1, rs2, fmt;
fmt = 0;
getrop23(ir);
switch((ir>>5)&0x1FF) {
default:
undef(ir);
case 0x41:
reg.fl[rd] = reg.fl[rs1] + reg.fl[rs2];
op = "fadds";
break;
case 0x42:
reg.fd[rd>>1] = reg.fd[rs1>>1] + reg.fd[rs2>>1];
op = "faddd";
break;
case 0x45:
reg.fl[rd] = reg.fl[rs1] - reg.fl[rs2];
op = "fsubs";
break;
case 0x46:
reg.fd[rd>>1] = reg.fd[rs1>>1] - reg.fd[rs2>>1];
op = "fsubd";
break;
case 0x4d:
if(reg.fl[rs2] == 0.0) {
Bprint(bioout, "fp_exception DZ\n");
longjmp(errjmp, 0);
}
reg.fl[rd] = reg.fl[rs1] / reg.fl[rs2];
op = "fdivs";
break;
case 0x4e:
if(reg.fd[rs2>>1] == 0.0) {
Bprint(bioout, "fp_exception DZ\n");
longjmp(errjmp, 0);
}
reg.fd[rd>>1] = reg.fd[rs1>>1] / reg.fd[rs2>>1];
op = "fdivd";
break;
case 0x49:
reg.fl[rd] = reg.fl[rs1] * reg.fl[rs2];
op = "fmuls";
break;
case 0x4a:
reg.fd[rd>>1] = reg.fd[rs1>>1] * reg.fd[rs2>>1];
op = "fmuld";
break;
case 0xc4:
reg.fl[rd] = (long)reg.di[rs2];
fmt = 1;
op = "fitos";
break;
case 0xc8:
reg.fd[rd>>1] = (long)reg.di[rs2];
fmt = 1;
op = "fitod";
break;
case 0xd1:
v = reg.fl[rs2];
reg.di[rd] = v;
fmt = 1;
op = "fstoi";
break;
case 0xd2:
v = reg.fd[rs2>>1];
reg.di[rd] = v;
fmt = 1;
op = "fdtoi";
break;
case 0x01:
reg.di[rd] = reg.di[rs2];
fmt = 1;
op = "fmovs";
break;
case 0x05:
reg.fl[rd] = -reg.fl[rs2];
fmt = 1;
op = "fnegs";
break;
case 0x09:
reg.fl[rd] = fabs(reg.fl[rs2]);
fmt = 1;
op = "fabss";
break;
case 0xc9:
reg.fd[rd>>1] = reg.fl[rs2];
fmt = 1;
op = "fstod";
break;
case 0xc6:
reg.fl[rd] = reg.fd[rs2>>1];
fmt = 1;
op = "fdtos";
break;
}
if(trace) {
switch(fmt) {
case 0:
itrace("%s\tf%d,f%d,f%d", op, rs1, rs2, rd);
break;
case 1:
itrace("%s\tf%d,f%d", op, rs2, rd);
break;
}
}
}