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pan/bi: Handle vectorized u2f16/i2f16

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Will be useful when we enable int16, I guess...

No shader-db changes.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14576>
This commit is contained in:
Alyssa Rosenzweig 2022-02-17 18:40:59 -05:00 • committed by Marge Bot
parent 6a05852f5b
commit a64534754d
1 changed files with 28 additions and 2 deletions
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30
src/panfrost/bifrost/bifrost_compile.c
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@ -1929,6 +1929,34 @@ bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
return;
}
/* While we do not have a direct V2U32_TO_V2F16 instruction, lowering to
* MKVEC.v2i16 + V2U16_TO_V2F16 is more efficient on Bifrost than
* scalarizing due to scheduling (equal cost on Valhall). Additionally
* if the source is replicated the MKVEC.v2i16 can be optimized out.
*/
case nir_op_u2f16:
case nir_op_i2f16: {
if (!(src_sz == 32 && comps == 2))
break;
nir_alu_src *src = &instr->src[0];
bi_index idx = bi_src_index(&src->src);
bi_index s0 = bi_word(idx, src->swizzle[0]);
bi_index s1 = bi_word(idx, src->swizzle[1]);
bi_index t = (src->swizzle[0] == src->swizzle[1]) ?
bi_half(s0, false) :
bi_mkvec_v2i16(b, bi_half(s0, false),
bi_half(s1, false));
if (instr->op == nir_op_u2f16)
bi_v2u16_to_v2f16_to(b, dst, t, BI_ROUND_NONE);
else
bi_v2s16_to_v2f16_to(b, dst, t, BI_ROUND_NONE);
return;
}
case nir_op_i2i8:
case nir_op_u2u8:
{
@ -3306,8 +3334,6 @@ bi_vectorize_filter(const nir_instr *instr, void *data)
case nir_op_ushr:
case nir_op_f2i16:
case nir_op_f2u16:
case nir_op_i2f16:
case nir_op_u2f16:
return false;
default:
return true;