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pan/bi: Implement 16-bit COMBINE lowering

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Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4766>
This commit is contained in:
Alyssa Rosenzweig
2020-04-27 10:37:20 -04:00
committed by Marge Bot
parent 280b65126e
commit fc4eb0714c
1 changed files with 25 additions and 1 deletions
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26
src/panfrost/bifrost/bi_lower_combine.c
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@@ -61,6 +61,25 @@ bi_combine_mov32(bi_context *ctx, bi_instruction *parent, unsigned comp, unsigne
bi_emit_before(ctx, parent, move);
}
static void
bi_combine_sel16(bi_context *ctx, bi_instruction *parent, unsigned comp, unsigned R)
{
bi_instruction sel = {
.type = BI_SELECT,
.dest = R,
.dest_type = nir_type_uint32,
.dest_offset = comp >> 1,
.src = { parent->src[comp], parent->src[comp + 1] },
.src_types = { nir_type_uint16, nir_type_uint16 },
.swizzle = { {
parent->swizzle[comp][0],
parent->swizzle[comp + 1][0],
} }
};
bi_emit_before(ctx, parent, sel);
}
/* Gets the instruction generating a given source. Combine lowering is
* accidentally O(n^2) right now because this function is O(n) instead of O(1).
* If this pass is slow, this cost can be avoided in favour for better
@@ -196,7 +215,12 @@ bi_lower_combine(bi_context *ctx, bi_block *block)
bi_insert_combine_mov(ctx, ins, s, R);
}
#endif
bi_combine_mov32(ctx, ins, s, R);
if (ins->dest_type == nir_type_uint32)
bi_combine_mov32(ctx, ins, s, R);
else {
bi_combine_sel16(ctx, ins, s, R);
s++;
}
}