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ir3: lower relevant 8-bit ALU ops in nir_lower_bit_size

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The nir_lower_bit_size pass is used to properly adapt specific 8-bit ALU
operations for correct behavior. In those cases inputs are converted to
16 bits and the result is converted back down to 8 bits.

Signed-off-by: Zan Dobersek <zdobersek@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29875>
This commit is contained in:
Zan Dobersek
2024-07-14 09:11:27 +02:00
committed by Marge Bot
parent 7fd5f76393
commit 8aa2cad5df
1 changed files with 41 additions and 14 deletions
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55
src/freedreno/ir3/ir3_nir.c
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@@ -161,21 +161,48 @@ ir3_nir_should_vectorize_mem(unsigned align_mul, unsigned align_offset,
static unsigned
ir3_lower_bit_size(const nir_instr *instr, UNUSED void *data)
{
if (instr->type != nir_instr_type_intrinsic)
return 0;
if (instr->type == nir_instr_type_intrinsic) {
nir_intrinsic_instr *intrinsic = nir_instr_as_intrinsic(instr);
switch (intrinsic->intrinsic) {
case nir_intrinsic_exclusive_scan:
case nir_intrinsic_inclusive_scan:
case nir_intrinsic_quad_broadcast:
case nir_intrinsic_quad_swap_diagonal:
case nir_intrinsic_quad_swap_horizontal:
case nir_intrinsic_quad_swap_vertical:
case nir_intrinsic_reduce:
return intrinsic->def.bit_size == 8 ? 16 : 0;
default:
break;
}
}
nir_intrinsic_instr *intrinsic = nir_instr_as_intrinsic(instr);
switch (intrinsic->intrinsic) {
case nir_intrinsic_exclusive_scan:
case nir_intrinsic_inclusive_scan:
case nir_intrinsic_quad_broadcast:
case nir_intrinsic_quad_swap_diagonal:
case nir_intrinsic_quad_swap_horizontal:
case nir_intrinsic_quad_swap_vertical:
case nir_intrinsic_reduce:
return intrinsic->def.bit_size == 8 ? 16 : 0;
default:
break;
if (instr->type == nir_instr_type_alu) {
nir_alu_instr *alu = nir_instr_as_alu(instr);
switch (alu->op) {
case nir_op_iabs:
case nir_op_iadd_sat:
case nir_op_imax:
case nir_op_imin:
case nir_op_ineg:
case nir_op_ishl:
case nir_op_ishr:
case nir_op_isub_sat:
case nir_op_uadd_sat:
case nir_op_umax:
case nir_op_umin:
case nir_op_ushr:
return alu->def.bit_size == 8 ? 16 : 0;
case nir_op_ieq:
case nir_op_ige:
case nir_op_ilt:
case nir_op_ine:
case nir_op_uge:
case nir_op_ult:
return nir_src_bit_size(alu->src[0].src) == 8 ? 16 : 0;
default:
break;
}
}
return 0;