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radeonsi: emit TGSI_OPCODE_READ_*

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Nicolai Hähnle 2017-03-30 14:15:27 +02:00
parent b46e3a30b7
commit 5c4602f4a2
1 changed files with 38 additions and 0 deletions
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38
src/gallium/drivers/radeonsi/si_shader.c
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@ -5230,6 +5230,39 @@ static void ballot_emit(
emit_data->output[1] = LLVMBuildExtractElement(builder, tmp, ctx->i32_1, "");
}
static void read_invoc_fetch_args(
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
emit_data->args[0] = lp_build_emit_fetch(bld_base, emit_data->inst,
0, emit_data->src_chan);
/* Always read the source invocation (= lane) from the X channel. */
emit_data->args[1] = lp_build_emit_fetch(bld_base, emit_data->inst,
1, TGSI_CHAN_X);
emit_data->arg_count = 2;
}
static void read_lane_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMBuilderRef builder = ctx->gallivm.builder;
for (unsigned i = 0; i < emit_data->arg_count; ++i) {
emit_data->args[i] = LLVMBuildBitCast(builder, emit_data->args[i],
ctx->i32, "");
}
emit_data->output[emit_data->chan] =
ac_build_intrinsic(&ctx->ac, action->intr_name,
ctx->i32, emit_data->args, emit_data->arg_count,
AC_FUNC_ATTR_READNONE |
AC_FUNC_ATTR_CONVERGENT);
}
static unsigned si_llvm_get_stream(struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
@ -6679,6 +6712,11 @@ static void si_init_shader_ctx(struct si_shader_context *ctx,
bld_base->op_actions[TGSI_OPCODE_VOTE_ANY].emit = vote_any_emit;
bld_base->op_actions[TGSI_OPCODE_VOTE_EQ].emit = vote_eq_emit;
bld_base->op_actions[TGSI_OPCODE_BALLOT].emit = ballot_emit;
bld_base->op_actions[TGSI_OPCODE_READ_FIRST].intr_name = "llvm.amdgcn.readfirstlane";
bld_base->op_actions[TGSI_OPCODE_READ_FIRST].emit = read_lane_emit;
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].intr_name = "llvm.amdgcn.readlane";
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].fetch_args = read_invoc_fetch_args;
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].emit = read_lane_emit;
bld_base->op_actions[TGSI_OPCODE_EMIT].emit = si_llvm_emit_vertex;
bld_base->op_actions[TGSI_OPCODE_ENDPRIM].emit = si_llvm_emit_primitive;