*/
#include "vc4_qir.h"
+#include "util/u_math.h"
static bool debug;
fprintf(stderr, "\n");
}
-static struct qreg
-follow_movs(struct qinst **defs, struct qreg reg)
+static bool
+is_constant_value(struct vc4_compile *c, struct qreg reg,
+ uint32_t val)
{
- while (reg.file == QFILE_TEMP && defs[reg.index]->op == QOP_MOV)
- reg = defs[reg.index]->src[0];
+ if (reg.file == QFILE_UNIF &&
+ !reg.pack &&
+ c->uniform_contents[reg.index] == QUNIFORM_CONSTANT &&
+ c->uniform_data[reg.index] == val) {
+ return true;
+ }
+
+ if (reg.file == QFILE_SMALL_IMM && reg.index == val)
+ return true;
+
+ return false;
+}
+
+static bool
+is_zero(struct vc4_compile *c, struct qreg reg)
+{
+ reg = qir_follow_movs(c, reg);
+ return is_constant_value(c, reg, 0);
+}
+
+static bool
+is_1f(struct vc4_compile *c, struct qreg reg)
+{
+ reg = qir_follow_movs(c, reg);
+ return is_constant_value(c, reg, fui(1.0));
+}
+
+static void
+replace_with_mov(struct vc4_compile *c, struct qinst *inst, struct qreg arg)
+{
+ dump_from(c, inst);
+
+ inst->src[0] = arg;
+ if (qir_has_implicit_tex_uniform(inst))
+ inst->src[1] = inst->src[qir_get_tex_uniform_src(inst)];
- return reg;
+ if (qir_is_mul(inst))
+ inst->op = QOP_MMOV;
+ else if (qir_is_float_input(inst))
+ inst->op = QOP_FMOV;
+ else
+ inst->op = QOP_MOV;
+ dump_to(c, inst);
}
static bool
-is_zero(struct vc4_compile *c, struct qinst **defs, struct qreg reg)
+replace_x_0_with_x(struct vc4_compile *c,
+ struct qinst *inst,
+ int arg)
{
- reg = follow_movs(defs, reg);
+ if (!is_zero(c, inst->src[arg]))
+ return false;
+ replace_with_mov(c, inst, inst->src[1 - arg]);
+ return true;
+}
- return (reg.file == QFILE_UNIF &&
- c->uniform_contents[reg.index] == QUNIFORM_CONSTANT &&
- c->uniform_data[reg.index] == 0);
+static bool
+replace_x_0_with_0(struct vc4_compile *c,
+ struct qinst *inst,
+ int arg)
+{
+ if (!is_zero(c, inst->src[arg]))
+ return false;
+ replace_with_mov(c, inst, inst->src[arg]);
+ return true;
+}
+
+static bool
+fmul_replace_one(struct vc4_compile *c,
+ struct qinst *inst,
+ int arg)
+{
+ if (!is_1f(c, inst->src[arg]))
+ return false;
+ replace_with_mov(c, inst, inst->src[1 - arg]);
+ return true;
}
bool
qir_opt_algebraic(struct vc4_compile *c)
{
bool progress = false;
- struct simple_node *node;
- struct qinst *defs[c->num_temps];
- foreach(node, &c->instructions) {
- struct qinst *inst = (struct qinst *)node;
+ qir_for_each_inst_inorder(inst, c) {
+ switch (inst->op) {
+ case QOP_FMIN:
+ if (is_1f(c, inst->src[1]) &&
+ inst->src[0].pack >= QPU_UNPACK_8D_REP &&
+ inst->src[0].pack <= QPU_UNPACK_8D) {
+ replace_with_mov(c, inst, inst->src[0]);
+ progress = true;
+ }
+ break;
- if (inst->dst.file == QFILE_TEMP)
- defs[inst->dst.index] = inst;
+ case QOP_FMAX:
+ if (is_zero(c, inst->src[1]) &&
+ inst->src[0].pack >= QPU_UNPACK_8D_REP &&
+ inst->src[0].pack <= QPU_UNPACK_8D) {
+ replace_with_mov(c, inst, inst->src[0]);
+ progress = true;
+ }
+ break;
- switch (inst->op) {
- case QOP_SEL_X_Y_ZS:
- case QOP_SEL_X_Y_ZC:
- case QOP_SEL_X_Y_NS:
- case QOP_SEL_X_Y_NC:
- if (qir_reg_equals(inst->src[0], inst->src[1])) {
- /* Turn "dst = (sf == x) ? a : a)" into
- * "dst = a"
- */
- dump_from(c, inst);
- inst->op = QOP_MOV;
- inst->src[0] = inst->src[1];
- inst->src[1] = c->undef;
+ case QOP_FSUB:
+ case QOP_SUB:
+ if (is_zero(c, inst->src[1])) {
+ replace_with_mov(c, inst, inst->src[0]);
+ progress = true;
+ }
+ break;
+
+ case QOP_ADD:
+ /* Kernel validation requires that we use an actual
+ * add instruction.
+ */
+ if (inst->dst.file != QFILE_TEX_S_DIRECT &&
+ (replace_x_0_with_x(c, inst, 0) ||
+ replace_x_0_with_x(c, inst, 1))) {
+ progress = true;
+ break;
+ }
+ break;
+
+ case QOP_FADD:
+ if (replace_x_0_with_x(c, inst, 0) ||
+ replace_x_0_with_x(c, inst, 1)) {
+ progress = true;
+ break;
+ }
+
+ /* FADD(a, FSUB(0, b)) -> FSUB(a, b) */
+ if (inst->src[1].file == QFILE_TEMP &&
+ c->defs[inst->src[1].index] &&
+ c->defs[inst->src[1].index]->op == QOP_FSUB) {
+ struct qinst *fsub = c->defs[inst->src[1].index];
+ if (is_zero(c, fsub->src[0])) {
+ dump_from(c, inst);
+ inst->op = QOP_FSUB;
+ inst->src[1] = fsub->src[1];
+ progress = true;
+ dump_to(c, inst);
+ break;
+ }
+ }
+
+ /* FADD(FSUB(0, b), a) -> FSUB(a, b) */
+ if (inst->src[0].file == QFILE_TEMP &&
+ c->defs[inst->src[0].index] &&
+ c->defs[inst->src[0].index]->op == QOP_FSUB) {
+ struct qinst *fsub = c->defs[inst->src[0].index];
+ if (is_zero(c, fsub->src[0])) {
+ dump_from(c, inst);
+ inst->op = QOP_FSUB;
+ inst->src[0] = inst->src[1];
+ inst->src[1] = fsub->src[1];
+ dump_to(c, inst);
+ progress = true;
+ break;
+ }
+ }
+ break;
+
+ case QOP_FMUL:
+ if (!inst->dst.pack &&
+ (replace_x_0_with_0(c, inst, 0) ||
+ replace_x_0_with_0(c, inst, 1) ||
+ fmul_replace_one(c, inst, 0) ||
+ fmul_replace_one(c, inst, 1))) {
+ progress = true;
+ break;
+ }
+ break;
+
+ case QOP_MUL24:
+ if (!inst->dst.pack &&
+ (replace_x_0_with_0(c, inst, 0) ||
+ replace_x_0_with_0(c, inst, 1))) {
+ progress = true;
+ break;
+ }
+ break;
+
+ case QOP_AND:
+ if (replace_x_0_with_0(c, inst, 0) ||
+ replace_x_0_with_0(c, inst, 1)) {
progress = true;
- dump_to(c, inst);
- } else if (is_zero(c, defs, inst->src[1])) {
- /* Replace references to a 0 uniform value
- * with the SEL_X_0 equivalent.
- */
- dump_from(c, inst);
- inst->op -= (QOP_SEL_X_Y_ZS - QOP_SEL_X_0_ZS);
- inst->src[1] = c->undef;
+ break;
+ }
+
+ if (is_constant_value(c, inst->src[0], ~0)) {
+ replace_with_mov(c, inst, inst->src[1]);
+ progress = true;
+ break;
+ }
+ if (is_constant_value(c, inst->src[1], ~0)) {
+ replace_with_mov(c, inst, inst->src[0]);
+ progress = true;
+ break;
+ }
+ break;
+
+ case QOP_OR:
+ if (replace_x_0_with_x(c, inst, 0) ||
+ replace_x_0_with_x(c, inst, 1)) {
+ progress = true;
+ break;
+ }
+ break;
+
+ case QOP_RCP:
+ if (is_1f(c, inst->src[0])) {
+ replace_with_mov(c, inst, inst->src[0]);
progress = true;
- dump_to(c, inst);
+ break;
}
break;
projects / mesa.git / blobdiff