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vc4: Factor out the turn-it-into-a-mov in opt_algebraic. 

This will be used more in the next commits.
This commit is contained in:
Eric Anholt 2014-10-09 15:07:24 +02:00
parent 40748cf8d9
commit 1cd8c1aab0
1 changed files with 12 additions and 10 deletions
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22
src/gallium/drivers/vc4/vc4_opt_algebraic.c
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@ -77,6 +77,16 @@ is_zero(struct vc4_compile *c, struct qinst **defs, struct qreg reg)
c->uniform_data[reg.index] == 0);
}
static void
replace_with_mov(struct vc4_compile *c, struct qinst *inst, struct qreg arg)
{
dump_from(c, inst);
inst->op = QOP_MOV;
inst->src[0] = arg;
inst->src[1] = c->undef;
dump_to(c, inst);
}
bool
qir_opt_algebraic(struct vc4_compile *c)
{
@ -115,12 +125,8 @@ qir_opt_algebraic(struct vc4_compile *c)
/* 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;
replace_with_mov(c, inst, inst->src[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.
@ -136,11 +142,7 @@ qir_opt_algebraic(struct vc4_compile *c)
case QOP_FSUB:
case QOP_SUB:
if (is_zero(c, defs, inst->src[1])) {
dump_from(c, inst);
inst->op = QOP_MOV;
inst->src[1] = c->undef;
progress = true;
dump_to(c, inst);
replace_with_mov(c, inst, inst->src[0]);
}
break;