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radeonsi: add support for tgsi ATOMDEC_WRAP / ATOMINC_WRAP opcodes

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Pierre-Eric Pelloux-Prayer 2019-07-12 15:57:54 +02:00 • committed by Marek Olšák
parent 704a6b5948
commit 8789248541
1 changed files with 23 additions and 0 deletions
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23
src/gallium/drivers/radeonsi/si_shader_tgsi_mem.c
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@ -827,6 +827,19 @@ static void atomic_emit(
args.data[num_data++] =
ac_to_integer(&ctx->ac, lp_build_emit_fetch(bld_base, inst, 2, 0));
if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMINC_WRAP) {
/* ATOMIC_INC instruction does:
* value = (value + 1) % (data + 1)
* but we want:
* value = (value + 1) % data
* So replace 'data' by 'data - 1'.
*/
args.data[0] = LLVMBuildSub(ctx->ac.builder,
args.data[0],
ctx->ac.i32_1, "");
}
args.cache_policy = get_cache_policy(ctx, inst, true, false, false);
if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
@ -902,6 +915,12 @@ static void atomic_emit(
case TGSI_OPCODE_ATOMUMAX: args.atomic = ac_atomic_umax; break;
case TGSI_OPCODE_ATOMIMIN: args.atomic = ac_atomic_smin; break;
case TGSI_OPCODE_ATOMIMAX: args.atomic = ac_atomic_smax; break;
case TGSI_OPCODE_ATOMINC_WRAP:
args.atomic = ac_atomic_inc_wrap;
break;
case TGSI_OPCODE_ATOMDEC_WRAP:
args.atomic = ac_atomic_dec_wrap;
break;
default: unreachable("unhandled image atomic");
}
}
@ -1821,4 +1840,8 @@ void si_shader_context_init_mem(struct si_shader_context *ctx)
bld_base->op_actions[TGSI_OPCODE_ATOMIMIN].intr_name = "smin";
bld_base->op_actions[TGSI_OPCODE_ATOMIMAX].emit = atomic_emit;
bld_base->op_actions[TGSI_OPCODE_ATOMIMAX].intr_name = "smax";
bld_base->op_actions[TGSI_OPCODE_ATOMINC_WRAP].emit = atomic_emit;
bld_base->op_actions[TGSI_OPCODE_ATOMINC_WRAP].intr_name = "inc";
bld_base->op_actions[TGSI_OPCODE_ATOMDEC_WRAP].emit = atomic_emit;
bld_base->op_actions[TGSI_OPCODE_ATOMDEC_WRAP].intr_name = "dec";
}