diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_shader.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 1bf5810322a..541dc7b943e 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -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; |