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intel/brw: Small code refactor in brw_fs_opt_saturate_propagation

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This bit of code will have a second use in the next commit.

v2: Fix some broken indentation. Noticed by Ken.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29774>
This commit is contained in:
Ian Romanick 2024-06-25 09:23:35 -07:00
parent 9125b7c1b4
commit adcce2bba4
1 changed files with 45 additions and 38 deletions
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83
src/intel/compiler/brw_fs_saturate_propagation.cpp
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@ -44,6 +44,49 @@ using namespace brw;
* MOV dst, tmp
*/
static bool
propagate_sat(fs_inst *inst, fs_inst *scan_inst)
{
if (scan_inst->dst.type != inst->dst.type) {
scan_inst->dst.type = inst->dst.type;
for (int i = 0; i < scan_inst->sources; i++) {
scan_inst->src[i].type = inst->dst.type;
}
}
if (inst->src[0].negate) {
if (scan_inst->opcode == BRW_OPCODE_MUL) {
scan_inst->src[0].negate = !scan_inst->src[0].negate;
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_MAD) {
for (int i = 0; i < 2; i++) {
if (scan_inst->src[i].file == IMM) {
brw_reg_negate_immediate(&scan_inst->src[i]);
} else {
scan_inst->src[i].negate = !scan_inst->src[i].negate;
}
}
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_ADD) {
if (scan_inst->src[1].file == IMM) {
if (!brw_reg_negate_immediate(&scan_inst->src[1])) {
return false;
}
} else {
scan_inst->src[1].negate = !scan_inst->src[1].negate;
}
scan_inst->src[0].negate = !scan_inst->src[0].negate;
inst->src[0].negate = false;
} else {
return false;
}
}
scan_inst->saturate = true;
inst->saturate = false;
return true;
}
static bool
opt_saturate_propagation_local(fs_visitor &s, bblock_t *block)
{
@ -82,44 +125,8 @@ opt_saturate_propagation_local(fs_visitor &s, bblock_t *block)
inst->saturate = false;
progress = true;
} else if (src_end_ip == ip || inst->dst.equals(inst->src[0])) {
if (scan_inst->can_do_saturate()) {
if (scan_inst->dst.type != inst->dst.type) {
scan_inst->dst.type = inst->dst.type;
for (int i = 0; i < scan_inst->sources; i++) {
scan_inst->src[i].type = inst->dst.type;
}
}
if (inst->src[0].negate) {
if (scan_inst->opcode == BRW_OPCODE_MUL) {
scan_inst->src[0].negate = !scan_inst->src[0].negate;
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_MAD) {
for (int i = 0; i < 2; i++) {
if (scan_inst->src[i].file == IMM) {
brw_reg_negate_immediate(&scan_inst->src[i]);
} else {
scan_inst->src[i].negate = !scan_inst->src[i].negate;
}
}
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_ADD) {
if (scan_inst->src[1].file == IMM) {
if (!brw_reg_negate_immediate(&scan_inst->src[1])) {
break;
}
} else {
scan_inst->src[1].negate = !scan_inst->src[1].negate;
}
scan_inst->src[0].negate = !scan_inst->src[0].negate;
inst->src[0].negate = false;
} else {
break;
}
}
scan_inst->saturate = true;
inst->saturate = false;
if (scan_inst->can_do_saturate() &&
propagate_sat(inst, scan_inst)) {
progress = true;
}
}