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pan/bi: Handle swizzles in i2i8 

Otherwise they get copypropped away.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10393>
This commit is contained in:
Alyssa Rosenzweig 2021-05-03 12:11:54 -04:00 committed by Marge Bot
parent e180374ab1
commit 3cc6a4c5d0
1 changed files with 16 additions and 10 deletions
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26
src/panfrost/bifrost/bifrost_compile.c
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@ -1529,8 +1529,8 @@ static void
bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
{
bi_index dst = bi_dest_index(&instr->dest.dest);
unsigned sz = nir_dest_bit_size(instr->dest.dest);
unsigned srcs = nir_op_infos[instr->op].num_inputs;
unsigned sz = nir_dest_bit_size(instr->dest.dest);
unsigned comps = nir_dest_num_components(instr->dest.dest);
unsigned src_sz = srcs > 0 ? nir_src_bit_size(instr->src[0].src) : 0;
@ -1631,6 +1631,21 @@ bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
return;
}
case nir_op_i2i8:
case nir_op_u2u8:
{
/* Acts like an 8-bit swizzle */
bi_index idx = bi_src_index(&instr->src[0].src);
unsigned factor = src_sz / 8;
unsigned chan[4] = { 0 };
for (unsigned i = 0; i < comps; ++i)
chan[i] = instr->src[0].swizzle[i] * factor;
bi_make_vec_to(b, dst, &idx, chan, comps, 8);
return;
}
default:
break;
}
@ -1909,15 +1924,6 @@ bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
bi_mov_i32_to(b, dst, s0);
break;
case nir_op_i2i8:
case nir_op_u2u8:
/* No vectorization in this part of the loop, so downcasts are
* a noop. When vectorization support lands, some case
* handlingg will be needed, but for the scalar case this is
* optimal as it can be copypropped away */
bi_mov_i32_to(b, dst, s0);
break;
case nir_op_fround_even:
case nir_op_fceil:
case nir_op_ffloor: