fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-06 07:18:17 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

vc4: Reduce MOV special-casing in QIR-to-QPU.

Browse source 
I'm going to introduce some more types of MOV, which also want the elision
of raw MOVs.
This commit is contained in:
Eric Anholt 2015-10-26 14:07:44 -07:00
parent 652a864b25
commit a7b424e835
1 changed files with 11 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/gallium/drivers/vc4/vc4_qpu_emit.c
View file

@ -209,6 +209,11 @@ vc4_generate_code(struct vc4_context *vc4, struct vc4_compile *c)
M(V8ADDS),
M(V8SUBS),
M(MUL24),
/* If we replicate src[0] out to src[1], this works
* out the same as a MOV.
*/
[QOP_MOV] = { QPU_A_OR },
};
struct qpu_reg src[4];
@ -264,14 +269,6 @@ vc4_generate_code(struct vc4_context *vc4, struct vc4_compile *c)
}
switch (qinst->op) {
case QOP_MOV:
/* Skip emitting the MOV if it's a no-op. */
if (qir_is_raw_mov(qinst) ||
dst.mux != src[0].mux || dst.addr != src[0].addr) {
queue(c, qpu_a_MOV(dst, src[0]));
}
break;
case QOP_SEL_X_0_ZS:
case QOP_SEL_X_0_ZC:
case QOP_SEL_X_0_NS:
@ -490,6 +487,12 @@ vc4_generate_code(struct vc4_context *vc4, struct vc4_compile *c)
assert(qinst->op < ARRAY_SIZE(translate));
assert(translate[qinst->op].op != 0); /* NOPs */
/* Skip emitting the MOV if it's a no-op. */
if (qir_is_raw_mov(qinst) &&
dst.mux == src[0].mux && dst.addr == src[0].addr) {
break;
}
/* If we have only one source, put it in the second
* argument slot as well so that we don't take up
* another raddr just to get unused data.