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pan/bi: Enumerate conversions

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There are lots of Bifrost conversion opcodes that can all be emitted
from BI_CONVERT, let's pattern match.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4382>
This commit is contained in:
Alyssa Rosenzweig 2020-03-27 18:57:58 -04:00 • committed by Marge Bot
parent 902f99a45d
commit 499e97b519
1 changed files with 51 additions and 1 deletions
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52
src/panfrost/bifrost/bi_pack.c
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@ -593,6 +593,55 @@ bi_pack_fma_csel(bi_instruction *ins, struct bi_registers *regs)
RETURN_PACKED(pack);
}
/* We have a single convert opcode in the IR but a number of opcodes that could
* come out. In particular we have native opcodes for:
*
* [ui]16 --> [fui]32 -- int16_to_32
* f16 --> f32 -- float16_to_32
* f32 --> f16 -- float32_to_16
* f32 --> [ui]32 -- float32_to_int
* [ui]32 --> f32 -- int_to_float32
* [fui]16 --> [fui]16 -- f2i_i2f16
*/
static unsigned
bi_pack_fma_convert(bi_instruction *ins, struct bi_registers *regs)
{
nir_alu_type from_base = nir_alu_type_get_base_type(ins->src_types[0]);
unsigned from_size = nir_alu_type_get_type_size(ins->src_types[0]);
nir_alu_type to_base = nir_alu_type_get_base_type(ins->dest_type);
unsigned to_size = nir_alu_type_get_type_size(ins->dest_type);
/* Sanity check */
assert((from_base != to_base) || (from_size != to_size));
assert((MAX2(from_size, to_size) / MIN2(from_size, to_size)) <= 2);
if (from_size == 16 && to_size == 16) {
/* f2i_i2f16 */
} else if (from_size == 32 && to_size == 32) {
if (from_base == nir_type_float) {
/* float32_to_int */
} else {
/* int_to_float32 */
}
} else if (from_size == 16 && to_size == 32) {
if (from_base == nir_type_float) {
/* float16_to_32 */
} else {
/* int16_to_32 */
}
} else if (from_size == 32 && to_size == 16) {
if (from_base == nir_type_float) {
/* float32_to_float16 */
} else {
/* XXX: No int32_to_int16? */
}
}
return BIFROST_FMA_NOP;
}
static unsigned
bi_pack_fma(bi_clause *clause, bi_bundle bundle, struct bi_registers *regs)
{
@ -604,8 +653,9 @@ bi_pack_fma(bi_clause *clause, bi_bundle bundle, struct bi_registers *regs)
return bi_pack_fma_add(bundle.fma, regs);
case BI_CMP:
case BI_BITWISE:
case BI_CONVERT:
return BIFROST_FMA_NOP;
case BI_CONVERT:
return bi_pack_fma_convert(bundle.fma, regs);
case BI_CSEL:
return bi_pack_fma_csel(bundle.fma, regs);
case BI_FMA: