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-rw-r--r--src/gallium/drivers/radeonsi/si_shader.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index fd43e2ace3d..b73076f29e5 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2761,6 +2761,143 @@ image_fetch_rsrc(
}
}
+static LLVMValueRef image_fetch_coords(
+ struct lp_build_tgsi_context *bld_base,
+ const struct tgsi_full_instruction *inst)
+{
+ struct gallivm_state *gallivm = bld_base->base.gallivm;
+ LLVMBuilderRef builder = gallivm->builder;
+ unsigned target = inst->Memory.Texture;
+ int sample;
+ unsigned num_coords = tgsi_util_get_texture_coord_dim(target, &sample);
+ LLVMValueRef coords[4];
+ LLVMValueRef tmp;
+ int chan;
+
+ for (chan = 0; chan < num_coords; ++chan) {
+ tmp = lp_build_emit_fetch(bld_base, inst, 1, chan);
+ tmp = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");
+ coords[chan] = tmp;
+ }
+
+ if (num_coords == 1)
+ return coords[0];
+
+ if (num_coords == 3) {
+ /* LLVM has difficulties lowering 3-element vectors. */
+ coords[3] = bld_base->uint_bld.undef;
+ num_coords = 4;
+ }
+
+ return lp_build_gather_values(gallivm, coords, num_coords);
+}
+
+/**
+ * Append the extra mode bits that are used by image load and store.
+ */
+static void image_append_args(
+ struct si_shader_context *ctx,
+ struct lp_build_emit_data * emit_data,
+ unsigned target)
+{
+ LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0);
+ LLVMValueRef i1true = LLVMConstInt(ctx->i1, 1, 0);
+
+ emit_data->args[emit_data->arg_count++] = i1false; /* r128 */
+ emit_data->args[emit_data->arg_count++] =
+ tgsi_is_array_image(target) ? i1true : i1false; /* da */
+ emit_data->args[emit_data->arg_count++] = i1false; /* glc */
+ emit_data->args[emit_data->arg_count++] = i1false; /* slc */
+}
+
+/**
+ * Append the resource and indexing arguments for buffer intrinsics.
+ *
+ * \param rsrc the 256 bit resource
+ * \param index index into the buffer
+ */
+static void buffer_append_args(
+ struct si_shader_context *ctx,
+ struct lp_build_emit_data *emit_data,
+ LLVMValueRef rsrc,
+ LLVMValueRef index)
+{
+ struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
+ struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
+ LLVMTypeRef v2i128 = LLVMVectorType(ctx->i128, 2);
+ LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0);
+
+ rsrc = LLVMBuildBitCast(gallivm->builder, rsrc, v2i128, "");
+ rsrc = LLVMBuildExtractElement(gallivm->builder, rsrc, bld_base->uint_bld.one, "");
+ rsrc = LLVMBuildBitCast(gallivm->builder, rsrc, ctx->v4i32, "");
+
+ emit_data->args[emit_data->arg_count++] = rsrc;
+ emit_data->args[emit_data->arg_count++] = index; /* vindex */
+ emit_data->args[emit_data->arg_count++] = bld_base->uint_bld.zero; /* voffset */
+ emit_data->args[emit_data->arg_count++] = i1false; /* glc */
+ emit_data->args[emit_data->arg_count++] = i1false; /* slc */
+}
+
+static void load_fetch_args(
+ struct lp_build_tgsi_context * bld_base,
+ struct lp_build_emit_data * emit_data)
+{
+ struct si_shader_context *ctx = si_shader_context(bld_base);
+ struct gallivm_state *gallivm = bld_base->base.gallivm;
+ const struct tgsi_full_instruction * inst = emit_data->inst;
+ unsigned target = inst->Memory.Texture;
+ LLVMValueRef coords;
+ LLVMValueRef rsrc;
+
+ emit_data->dst_type = LLVMVectorType(bld_base->base.elem_type, 4);
+
+ image_fetch_rsrc(bld_base, &inst->Src[0], &rsrc);
+ coords = image_fetch_coords(bld_base, inst);
+
+ if (target == TGSI_TEXTURE_BUFFER) {
+ buffer_append_args(ctx, emit_data, rsrc, coords);
+ } else {
+ emit_data->args[0] = coords;
+ emit_data->args[1] = rsrc;
+ emit_data->args[2] = lp_build_const_int32(gallivm, 15); /* dmask */
+ emit_data->arg_count = 3;
+
+ image_append_args(ctx, emit_data, target);
+ }
+}
+
+static void load_emit(
+ const struct lp_build_tgsi_action *action,
+ struct lp_build_tgsi_context *bld_base,
+ struct lp_build_emit_data *emit_data)
+{
+ struct gallivm_state *gallivm = bld_base->base.gallivm;
+ LLVMBuilderRef builder = gallivm->builder;
+ const struct tgsi_full_instruction * inst = emit_data->inst;
+ unsigned target = inst->Memory.Texture;
+ char intrinsic_name[32];
+ char coords_type[8];
+
+ if (target == TGSI_TEXTURE_BUFFER) {
+ emit_data->output[emit_data->chan] = lp_build_intrinsic(
+ builder, "llvm.amdgcn.buffer.load.format.v4f32", emit_data->dst_type,
+ emit_data->args, emit_data->arg_count,
+ LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
+ } else {
+ build_int_type_name(LLVMTypeOf(emit_data->args[0]),
+ coords_type, sizeof(coords_type));
+
+ snprintf(intrinsic_name, sizeof(intrinsic_name),
+ "llvm.amdgcn.image.load.%s", coords_type);
+
+ emit_data->output[emit_data->chan] =
+ lp_build_intrinsic(
+ builder, intrinsic_name, emit_data->dst_type,
+ emit_data->args, emit_data->arg_count,
+ LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
+ }
+}
+
static void resq_fetch_args(
struct lp_build_tgsi_context * bld_base,
struct lp_build_emit_data * emit_data)
@@ -4991,6 +5128,8 @@ static void si_init_shader_ctx(struct si_shader_context *ctx,
bld_base->op_actions[TGSI_OPCODE_LODQ] = tex_action;
bld_base->op_actions[TGSI_OPCODE_TXQS].emit = si_llvm_emit_txqs;
+ bld_base->op_actions[TGSI_OPCODE_LOAD].fetch_args = load_fetch_args;
+ bld_base->op_actions[TGSI_OPCODE_LOAD].emit = load_emit;
bld_base->op_actions[TGSI_OPCODE_RESQ].fetch_args = resq_fetch_args;
bld_base->op_actions[TGSI_OPCODE_RESQ].emit = resq_emit;