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pan/midgard: Generalize mir_mask_of_read_components

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This now works for load/store and texture instructions as well as ALU.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig
2019-08-05 14:47:28 -07:00
parent 419ddd63b0
commit 7090971f2f
1 changed files with 24 additions and 11 deletions
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src/panfrost/midgard/mir.c
+24 -11
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@@ -345,35 +345,48 @@ mir_is_written_before(compiler_context *ctx, midgard_instruction *ins, unsigned
*/
static unsigned
mir_mask_of_read_components_single(unsigned src, unsigned outmask)
mir_mask_of_read_components_single(unsigned swizzle, unsigned outmask)
{
midgard_vector_alu_src s = vector_alu_from_unsigned(src);
unsigned mask = 0;
for (unsigned c = 0; c < 4; ++c) {
if (!(outmask & (1 << c))) continue;
unsigned comp = (s.swizzle >> (2*c)) & 3;
unsigned comp = (swizzle >> (2*c)) & 3;
mask |= (1 << comp);
}
return mask;
}
static unsigned
mir_source_count(midgard_instruction *ins)
{
if (ins->type == TAG_ALU_4) {
/* ALU is always binary */
return 2;
} else if (ins->type == TAG_LOAD_STORE_4) {
bool load = !OP_IS_STORE(ins->load_store.op);
return (load ? 2 : 3);
} else if (ins->type == TAG_TEXTURE_4) {
/* Coords, bias.. TODO: Offsets? */
return 2;
} else {
unreachable("Invalid instruction type");
}
}
unsigned
mir_mask_of_read_components(midgard_instruction *ins, unsigned node)
{
assert(ins->type == TAG_ALU_4);
unsigned mask = 0;
if (ins->ssa_args.src[0] == node)
mask |= mir_mask_of_read_components_single(ins->alu.src1, ins->mask);
for (unsigned i = 0; i < mir_source_count(ins); ++i) {
if (ins->ssa_args.src[i] != node) continue;
if (ins->ssa_args.src[1] == node)
mask |= mir_mask_of_read_components_single(ins->alu.src2, ins->mask);
assert(ins->ssa_args.src[2] == -1);
unsigned swizzle = mir_get_swizzle(ins, i);
mask |= mir_mask_of_read_components_single(swizzle, ins->mask);
}
return mask;
}