vmul.c
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#include <stdio.h>
#include "vudefs.h"
/**************************************************************************
* used by all the mul instructions
* =========================
*
* Check_Vmul(tno, Op, rMp,vS,vT,vT_El,vD,vDexp,vTemp,vAccl,vAccm,vAcch,
* vAcclExp,vAccmExp,vAcchExp,v4000,v0001)
**************************************************************************/
char *Templ_vmul_frmt = "( %2d, %s, $26, $v%-d, $v%-d, $v%-d%-s, $v%-d, $v%-d, $v%-d, $v%-d, $v%-d, $v%-d, $v%-d, $v%-d, $v%-d,$v%-d, $v%-d)\n";
vmulfu(fp)
FILE *fp;
{
int i,j,doaccu,type_f,type_u;
i16 si, ti;
i64 tacc, clamp_mask;
clamp_mask = 0xffffffff80000000;
doaccu = optab[opindex].enu_name==VMACF||optab[opindex].enu_name==VMACU;
type_f = optab[opindex].enu_name==VMULF||optab[opindex].enu_name==VMACF;
type_u = optab[opindex].enu_name==VMULU||optab[opindex].enu_name==VMACU;
for (i=0; i<8; i++) {
si = (i16) vs[i];
ti = get_ti(i);
tacc = (i64) ((i64)si * (i64)ti);
tacc <<= 1; /*normalize*/
tacc += (doaccu) ? vacc[i] : 32768; /*add Accum, round*/
fix_acc(&tacc);
vacc[i] = tacc;
/* Clamping and shifting*/
if (tacc>0 && (tacc & clamp_mask))
vd[i] = (type_f) ? 0x7fff : 0xffff;
else
if (tacc<0 && (~tacc & clamp_mask) && type_f)
vd[i] = -32768;
else
if (tacc<0 && type_u)
vd[i] = 0;
else
vd[i] = (tacc>>16) & 0xffff;
} /*for loop*/
mul_output(fp);
}
vmuldbl(fp)
FILE *fp;
{
int i,j,doaccu,low, high, mdl_m, mdl_n;
i16 si, ti;
u16 su, tu;
i64 tacc, clamp_mask;
clamp_mask = 0xffffffff80000000;
doaccu = optab[opindex].enu_name==VMADL ||
optab[opindex].enu_name==VMADM ||
optab[opindex].enu_name==VMADN ||
optab[opindex].enu_name==VMADH ;
low = optab[opindex].enu_name==VMUDL||optab[opindex].enu_name==VMADL;
high = optab[opindex].enu_name==VMUDH||optab[opindex].enu_name==VMADH;
mdl_m = optab[opindex].enu_name==VMUDM||optab[opindex].enu_name==VMADM;
mdl_n = optab[opindex].enu_name==VMUDN||optab[opindex].enu_name==VMADN;
for (i=0; i<8; i++) {
if (low) {
su = (u16) (vs[i] & 0xffff);
tu = (u16) (get_ti(i) & 0xffff);
tacc = (i64) ((u64)su * (u64)tu);
tacc >>= 16;
}
else
if (mdl_m) {
si = (i16) vs[i];
tu = (u16) (get_ti(i) & 0xffff);
tacc = (i64) ((i64)si * (u64)tu);
}
else
if (mdl_n) {
su = (u16) (vs[i] & 0xffff);
ti = (i16) get_ti(i);
tacc = (i64) ((u64)su * (i64)ti);
}
else {
si = (i16) vs[i];
ti = (i16) get_ti(i);
tacc = (i64) ((i64)si * (i64)ti);
tacc <<= 16;
}
if (doaccu) tacc = vacc[i] + tacc; /*add Accum*/
fix_acc(&tacc);
vacc[i] = tacc;
/* Clamping and shifting*/
if (tacc>0 && (tacc & clamp_mask))
vd[i] = (low | mdl_n) ? 0xffff : 0x7fff;
else
if (tacc<0 && (~tacc & clamp_mask))
vd[i] = (low | mdl_n) ? 0x0 : -32768;
else
vd[i] = (low||mdl_n) ? tacc&0xffff : (tacc>>16) & 0xffff;
} /*for loop*/
mul_output(fp);
}
vmulq(fp)
FILE *fp;
{
int i,j,doaccu,bit21;
i16 si, ti;
i64 tacc, clamp_mask;
i32 macq_bits;
clamp_mask = 0xffffffff00000000;
for (i=0; i<8; i++) {
if (optab[opindex].enu_name==VMULQ)
{
si = (i16) vs[i];
ti = get_ti(i);
tacc = (i64) ((i64)si * (i64)ti);
tacc <<= 16;
if (tacc<0) tacc += (31<<16);
}
else /*macq*/
{
bit21 = (vacc[i]>>21) & 0x1;
macq_bits = (vacc[i]>>22);
if (macq_bits<0 && bit21==0) tacc = vacc[i] + ( 32<<16);
else if (macq_bits>0 && bit21==0) tacc = vacc[i] + (-32<<16);
else tacc = vacc[i];
vs[i] = ((0x1234 * (i+1))^(0xabcd * (i+4))) & 0xfff;
vt[i] = ((0xfedc * (i+2))^(0x3498 * (i+6))) & 0xfff;
}
fix_acc(&tacc);
vacc[i] = tacc;
/* Clamping and shifting*/
if (tacc>0 && (tacc & clamp_mask))
vd[i] = 0x7fff & 0xfff0;
else
if (tacc<0 && (~tacc & clamp_mask))
vd[i] = -32768 & 0xfff0;
else
vd[i] = (tacc >> 17 ) & 0xfff0;
} /*for loop*/
mul_output(fp);
}
vrndpn(fp)
FILE *fp;
{
int i,j,doaccu,rndp;
i16 si, ti;
i64 tacc, clamp_mask,round;
clamp_mask = 0xffffffff80000000;
rndp = optab[opindex].enu_name==VRNDP;
for (i=0; i<8; i++) {
ti = get_ti(i);
/* calculate rounding value*/
if (regtab[SRC].rnum==1) round = (i64) ((i64)ti<<16);
else round = (i64) ti;
/* round */
if ((vacc[i]>=0 && rndp) || (vacc[i]<0 && !rndp))
tacc = vacc[i] + round;
else
tacc = vacc[i];
fix_acc(&tacc);
vacc[i] = tacc;
/* Clamping and shifting*/
if (tacc>0 && (tacc & clamp_mask))
vd[i] = 0x7fff;
else
if (tacc<0 && (~tacc & clamp_mask))
vd[i] = -32768;
else
vd[i] = (tacc >> 16 ) & 0xffff;
} /*for loop*/
mul_output(fp);
}
mul_output(fp)
FILE *fp;
{
int i;
if (data_pntr < (2048 - 100))
{
/* initidLize data segment starting at data_pntr */
/* SRC, TRGT, RES, RES_ACCH, RES_ACCM, RES_ACCL */
for (i=0;i<8;i++) {data[data_pntr++] = vs[i];}
for (i=0;i<8;i++) {data[data_pntr++] = vt[i];}
for (i=0;i<8;i++) {data[data_pntr++] = vd[i];}
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc_B[i] )&0xffff;
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc_B[i]>>16)&0xffff;
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc_B[i]>>32)&0xffff;
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc[i] )&0xffff;
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc[i]>>16)&0xffff;
for (i=0;i<8;i++) data[data_pntr++] = (u16)(vacc[i]>>32)&0xffff;
}
fprintf(fp,optab[opindex].op_tmplt);
fprintf(fp,Templ_vmul_frmt,
test_num,
optab[opindex].name,
regtab[SRC].rnum,
regtab[TRG].rnum,
regtab[TRG].rnum,el_sf,
regtab[DST].rnum,
regtab[DST_EXP].rnum,
regtab[TEMP].rnum,
regtab[ACCL].rnum,
regtab[ACCM].rnum,
regtab[ACCH].rnum,
regtab[ACCL_EXP].rnum,
regtab[ACCM_EXP].rnum,
regtab[ACCH_EXP].rnum,
regtab[V4000].rnum,
regtab[V0001].rnum
);
}
fix_acc(i64 *tacc)
{
int bit47;
bit47 = (*tacc >> 47) & 0x1;
if (bit47)
*tacc = 0xffff000000000000 | (*tacc&0xffffffffffff);
else
*tacc = (*tacc&0xffffffffffff);
}