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nv50: use broadcast TEMP reg in tx_insn 

Makes some opcode cases nicer and might reduce the total
nr of TEMPs required, or save some MOVs.
This commit is contained in:
Christoph Bumiller 2009-09-10 16:33:54 +02:00
parent 234d82ed63
commit 81de711fc8
1 changed files with 28 additions and 60 deletions
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88
src/gallium/drivers/nv50/nv50_program.c
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@ -1402,7 +1402,7 @@ static boolean
nv50_program_tx_insn(struct nv50_pc *pc,
const struct tgsi_full_instruction *inst)
{
struct nv50_reg *rdst[4], *dst[4], *src[3][4], *temp;
struct nv50_reg *rdst[4], *dst[4], *brdc, *src[3][4], *temp;
unsigned mask, sat, unit;
int i, c;
@ -1435,6 +1435,12 @@ nv50_program_tx_insn(struct nv50_pc *pc,
src[i][c] = tgsi_src(pc, c, fs, neg_supp);
}
brdc = temp = pc->r_brdc;
if (brdc && brdc->type != P_TEMP) {
temp = temp_temp(pc);
if (sat)
brdc = temp;
} else
if (sat) {
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)) || dst[c]->type == P_TEMP)
@ -1444,6 +1450,8 @@ nv50_program_tx_insn(struct nv50_pc *pc,
}
}
assert(brdc || !is_scalar_op(inst->Instruction.Opcode));
switch (inst->Instruction.Opcode) {
case TGSI_OPCODE_ABS:
for (c = 0; c < 4; c++) {
@ -1470,63 +1478,35 @@ nv50_program_tx_insn(struct nv50_pc *pc,
}
break;
case TGSI_OPCODE_DP3:
temp = temp_temp(pc);
emit_mul(pc, temp, src[0][0], src[1][0]);
emit_mad(pc, temp, src[0][1], src[1][1], temp);
emit_mad(pc, temp, src[0][2], src[1][2], temp);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_mad(pc, brdc, src[0][2], src[1][2], temp);
break;
case TGSI_OPCODE_DP4:
temp = temp_temp(pc);
emit_mul(pc, temp, src[0][0], src[1][0]);
emit_mad(pc, temp, src[0][1], src[1][1], temp);
emit_mad(pc, temp, src[0][2], src[1][2], temp);
emit_mad(pc, temp, src[0][3], src[1][3], temp);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_mad(pc, brdc, src[0][3], src[1][3], temp);
break;
case TGSI_OPCODE_DPH:
temp = temp_temp(pc);
emit_mul(pc, temp, src[0][0], src[1][0]);
emit_mad(pc, temp, src[0][1], src[1][1], temp);
emit_mad(pc, temp, src[0][2], src[1][2], temp);
emit_add(pc, temp, src[1][3], temp);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_add(pc, brdc, src[1][3], temp);
break;
case TGSI_OPCODE_DST:
{
struct nv50_reg *one = alloc_immd(pc, 1.0);
if (mask & (1 << 0))
emit_mov(pc, dst[0], one);
if (mask & (1 << 1))
emit_mul(pc, dst[1], src[0][1], src[1][1]);
if (mask & (1 << 2))
emit_mov(pc, dst[2], src[0][2]);
if (mask & (1 << 3))
emit_mov(pc, dst[3], src[1][3]);
FREE(one);
}
if (mask & (1 << 0))
emit_mov_immdval(pc, dst[0], 1.0f);
break;
case TGSI_OPCODE_EX2:
temp = temp_temp(pc);
emit_preex2(pc, temp, src[0][0]);
emit_flop(pc, 6, temp, temp);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_flop(pc, 6, brdc, temp);
break;
case TGSI_OPCODE_FLR:
for (c = 0; c < 4; c++) {
@ -1555,13 +1535,7 @@ nv50_program_tx_insn(struct nv50_pc *pc,
emit_lit(pc, &dst[0], mask, &src[0][0]);
break;
case TGSI_OPCODE_LG2:
temp = temp_temp(pc);
emit_flop(pc, 3, temp, src[0][0]);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_flop(pc, 3, brdc, src[0][0]);
break;
case TGSI_OPCODE_LRP:
temp = temp_temp(pc);
@ -1609,31 +1583,18 @@ nv50_program_tx_insn(struct nv50_pc *pc,
}
break;
case TGSI_OPCODE_POW:
temp = temp_temp(pc);
emit_pow(pc, temp, src[0][0], src[1][0]);
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))
continue;
emit_mov(pc, dst[c], temp);
}
emit_pow(pc, brdc, src[0][0], src[1][0]);
break;
case TGSI_OPCODE_RCP:
for (c = 3; c >= 0; c--) {
if (!(mask & (1 << c)))
continue;
emit_flop(pc, 0, dst[c], src[0][0]);
}
emit_flop(pc, 0, brdc, src[0][0]);
break;
case TGSI_OPCODE_RSQ:
for (c = 3; c >= 0; c--) {
if (!(mask & (1 << c)))
continue;
emit_flop(pc, 2, dst[c], src[0][0]);
}
emit_flop(pc, 2, brdc, src[0][0]);
break;
case TGSI_OPCODE_SCS:
temp = temp_temp(pc);
emit_precossin(pc, temp, src[0][0]);
if (mask & 3)
emit_precossin(pc, temp, src[0][0]);
if (mask & (1 << 0))
emit_flop(pc, 5, dst[0], temp);
if (mask & (1 << 1))
@ -1706,6 +1667,13 @@ nv50_program_tx_insn(struct nv50_pc *pc,
return FALSE;
}
if (brdc) {
if (sat)
emit_sat(pc, brdc, brdc);
for (c = 0; c < 4; c++)
if ((mask & (1 << c)) && dst[c] != brdc)
emit_mov(pc, dst[c], brdc);
} else
if (sat) {
for (c = 0; c < 4; c++) {
if (!(mask & (1 << c)))