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cell: fix code emit for RSQ/RCP when src arg == dst arg

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Fixes moire-like artifacts seen in fslight demo.
This commit is contained in:
Brian Paul 2009-01-05 19:50:54 -07:00
parent cd5d3fde13
commit b7257890dc
1 changed files with 8 additions and 6 deletions
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14
src/gallium/drivers/cell/ppu/cell_gen_fp.c
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@ -728,7 +728,7 @@ emit_LERP(struct codegen *gen, const struct tgsi_full_instruction *inst)
static boolean
emit_RCP_RSQ(struct codegen *gen, const struct tgsi_full_instruction *inst)
{
int ch, s1_reg[4], d_reg[4];
int ch, s1_reg[4], d_reg[4], tmp_reg[4];
if (inst->Instruction.Opcode == TGSI_OPCODE_RCP) {
spe_comment(gen->f, -4, "RCP:");
@ -741,21 +741,23 @@ emit_RCP_RSQ(struct codegen *gen, const struct tgsi_full_instruction *inst)
FOR_EACH_ENABLED_CHANNEL(inst, ch) {
s1_reg[ch] = get_src_reg(gen, ch, &inst->FullSrcRegisters[0]);
d_reg[ch] = get_dst_reg(gen, ch, &inst->FullDstRegisters[0]);
tmp_reg[ch] = get_itemp(gen);
}
FOR_EACH_ENABLED_CHANNEL(inst, ch) {
if (inst->Instruction.Opcode == TGSI_OPCODE_RCP) {
/* d = 1/s1 */
spe_frest(gen->f, d_reg[ch], s1_reg[ch]);
/* tmp = 1/s1 */
spe_frest(gen->f, tmp_reg[ch], s1_reg[ch]);
}
else {
/* d = 1/sqrt(s1) */
spe_frsqest(gen->f, d_reg[ch], s1_reg[ch]);
/* tmp = 1/sqrt(s1) */
spe_frsqest(gen->f, tmp_reg[ch], s1_reg[ch]);
}
}
FOR_EACH_ENABLED_CHANNEL(inst, ch) {
spe_fi(gen->f, d_reg[ch], s1_reg[ch], d_reg[ch]);
/* d = float_interp(s1, tmp) */
spe_fi(gen->f, d_reg[ch], s1_reg[ch], tmp_reg[ch]);
}
FOR_EACH_ENABLED_CHANNEL(inst, ch) {