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-rw-r--r--src/gallium/drivers/r600/r600_shader.c280
1 files changed, 279 insertions, 1 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 53b4c7788fc..a861f889baa 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -1419,6 +1419,277 @@ static int tgsi_split_gs_inputs(struct r600_shader_ctx *ctx)
return 0;
}
+
+/* Tessellation shaders pass outputs to the next shader using LDS.
+ *
+ * LS outputs = TCS(HS) inputs
+ * TCS(HS) outputs = TES(DS) inputs
+ *
+ * The LDS layout is:
+ * - TCS inputs for patch 0
+ * - TCS inputs for patch 1
+ * - TCS inputs for patch 2 = get_tcs_in_current_patch_offset (if RelPatchID==2)
+ * - ...
+ * - TCS outputs for patch 0 = get_tcs_out_patch0_offset
+ * - Per-patch TCS outputs for patch 0 = get_tcs_out_patch0_patch_data_offset
+ * - TCS outputs for patch 1
+ * - Per-patch TCS outputs for patch 1
+ * - TCS outputs for patch 2 = get_tcs_out_current_patch_offset (if RelPatchID==2)
+ * - Per-patch TCS outputs for patch 2 = get_tcs_out_current_patch_data_offset (if RelPatchID==2)
+ * - ...
+ *
+ * All three shaders VS(LS), TCS, TES share the same LDS space.
+ */
+/* this will return with the dw address in temp_reg.x */
+static int r600_get_byte_address(struct r600_shader_ctx *ctx, int temp_reg,
+ const struct tgsi_full_dst_register *dst,
+ const struct tgsi_full_src_register *src,
+ int stride_bytes_reg, int stride_bytes_chan)
+{
+ struct tgsi_full_dst_register reg;
+ ubyte *name, *index, *array_first;
+ int r;
+ int param;
+ struct tgsi_shader_info *info = &ctx->info;
+ /* Set the register description. The address computation is the same
+ * for sources and destinations. */
+ if (src) {
+ reg.Register.File = src->Register.File;
+ reg.Register.Index = src->Register.Index;
+ reg.Register.Indirect = src->Register.Indirect;
+ reg.Register.Dimension = src->Register.Dimension;
+ reg.Indirect = src->Indirect;
+ reg.Dimension = src->Dimension;
+ reg.DimIndirect = src->DimIndirect;
+ } else
+ reg = *dst;
+
+ /* If the register is 2-dimensional (e.g. an array of vertices
+ * in a primitive), calculate the base address of the vertex. */
+ if (reg.Register.Dimension) {
+ int sel, chan;
+ if (reg.Dimension.Indirect) {
+ unsigned addr_reg;
+ assert (reg.DimIndirect.File == TGSI_FILE_ADDRESS);
+
+ addr_reg = get_address_file_reg(ctx, reg.DimIndirect.Index);
+ /* pull the value from index_reg */
+ sel = addr_reg;
+ chan = 0;
+ } else {
+ sel = V_SQ_ALU_SRC_LITERAL;
+ chan = reg.Dimension.Index;
+ }
+
+ r = single_alu_op3(ctx, ALU_OP3_MULADD_UINT24,
+ temp_reg, 0,
+ stride_bytes_reg, stride_bytes_chan,
+ sel, chan,
+ temp_reg, 0);
+ if (r)
+ return r;
+ }
+
+ if (reg.Register.File == TGSI_FILE_INPUT) {
+ name = info->input_semantic_name;
+ index = info->input_semantic_index;
+ array_first = info->input_array_first;
+ } else if (reg.Register.File == TGSI_FILE_OUTPUT) {
+ name = info->output_semantic_name;
+ index = info->output_semantic_index;
+ array_first = info->output_array_first;
+ } else {
+ assert(0);
+ return -1;
+ }
+ if (reg.Register.Indirect) {
+ int addr_reg;
+ int first;
+ /* Add the relative address of the element. */
+ if (reg.Indirect.ArrayID)
+ first = array_first[reg.Indirect.ArrayID];
+ else
+ first = reg.Register.Index;
+
+ addr_reg = get_address_file_reg(ctx, reg.Indirect.Index);
+
+ /* pull the value from index_reg */
+ r = single_alu_op3(ctx, ALU_OP3_MULADD_UINT24,
+ temp_reg, 0,
+ V_SQ_ALU_SRC_LITERAL, 16,
+ addr_reg, 0,
+ temp_reg, 0);
+ if (r)
+ return r;
+
+ param = r600_get_lds_unique_index(name[first],
+ index[first]);
+
+ } else {
+ param = r600_get_lds_unique_index(name[reg.Register.Index],
+ index[reg.Register.Index]);
+ }
+
+ /* add to base_addr - passed in temp_reg.x */
+ if (param) {
+ r = single_alu_op2(ctx, ALU_OP2_ADD_INT,
+ temp_reg, 0,
+ temp_reg, 0,
+ V_SQ_ALU_SRC_LITERAL, param * 16);
+ if (r)
+ return r;
+
+ }
+ return 0;
+}
+
+static int do_lds_fetch_values(struct r600_shader_ctx *ctx, unsigned temp_reg,
+ unsigned dst_reg)
+{
+ struct r600_bytecode_alu alu;
+ int r, i;
+
+ if ((ctx->bc->cf_last->ndw>>1) >= 0x60)
+ ctx->bc->force_add_cf = 1;
+ for (i = 1; i < 4; i++) {
+ r = single_alu_op2(ctx, ALU_OP2_ADD_INT,
+ temp_reg, i,
+ temp_reg, 0,
+ V_SQ_ALU_SRC_LITERAL, 4 * i);
+ }
+ for (i = 0; i < 4; i++) {
+ /* emit an LDS_READ_RET */
+ memset(&alu, 0, sizeof(alu));
+ alu.op = LDS_OP1_LDS_READ_RET;
+ alu.src[0].sel = temp_reg;
+ alu.src[0].chan = i;
+ alu.src[1].sel = V_SQ_ALU_SRC_0;
+ alu.src[2].sel = V_SQ_ALU_SRC_0;
+ alu.dst.chan = 0;
+ alu.is_lds_idx_op = true;
+ alu.last = 1;
+ r = r600_bytecode_add_alu(ctx->bc, &alu);
+ if (r)
+ return r;
+ }
+ for (i = 0; i < 4; i++) {
+ /* then read from LDS_OQ_A_POP */
+ memset(&alu, 0, sizeof(alu));
+
+ alu.op = ALU_OP1_MOV;
+ alu.src[0].sel = EG_V_SQ_ALU_SRC_LDS_OQ_A_POP;
+ alu.src[0].chan = 0;
+ alu.dst.sel = dst_reg;
+ alu.dst.chan = i;
+ alu.dst.write = 1;
+ alu.last = 1;
+ r = r600_bytecode_add_alu(ctx->bc, &alu);
+ if (r)
+ return r;
+ }
+ return 0;
+}
+
+static int fetch_tes_input(struct r600_shader_ctx *ctx, struct tgsi_full_src_register *src, unsigned int dst_reg)
+{
+ int r;
+ unsigned temp_reg = r600_get_temp(ctx);
+
+ r = get_lds_offset0(ctx, 2, temp_reg,
+ src->Register.Dimension ? false : true);
+ if (r)
+ return r;
+
+ /* the base address is now in temp.x */
+ r = r600_get_byte_address(ctx, temp_reg,
+ NULL, src, ctx->tess_output_info, 1);
+ if (r)
+ return r;
+
+ r = do_lds_fetch_values(ctx, temp_reg, dst_reg);
+ if (r)
+ return r;
+ return 0;
+}
+
+static int fetch_tcs_input(struct r600_shader_ctx *ctx, struct tgsi_full_src_register *src, unsigned int dst_reg)
+{
+ int r;
+ unsigned temp_reg = r600_get_temp(ctx);
+
+ /* t.x = ips * r0.y */
+ r = single_alu_op2(ctx, ALU_OP2_MUL_UINT24,
+ temp_reg, 0,
+ ctx->tess_input_info, 0,
+ 0, 1);
+
+ if (r)
+ return r;
+
+ /* the base address is now in temp.x */
+ r = r600_get_byte_address(ctx, temp_reg,
+ NULL, src, ctx->tess_input_info, 1);
+ if (r)
+ return r;
+
+ r = do_lds_fetch_values(ctx, temp_reg, dst_reg);
+ if (r)
+ return r;
+ return 0;
+}
+
+static int fetch_tcs_output(struct r600_shader_ctx *ctx, struct tgsi_full_src_register *src, unsigned int dst_reg)
+{
+ int r;
+ unsigned temp_reg = r600_get_temp(ctx);
+
+ r = get_lds_offset0(ctx, 1, temp_reg,
+ src->Register.Dimension ? false : true);
+ if (r)
+ return r;
+ /* the base address is now in temp.x */
+ r = r600_get_byte_address(ctx, temp_reg,
+ NULL, src,
+ ctx->tess_output_info, 1);
+ if (r)
+ return r;
+
+ r = do_lds_fetch_values(ctx, temp_reg, dst_reg);
+ if (r)
+ return r;
+ return 0;
+}
+
+static int tgsi_split_lds_inputs(struct r600_shader_ctx *ctx)
+{
+ struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+ int i;
+
+ for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
+ struct tgsi_full_src_register *src = &inst->Src[i];
+
+ if (ctx->type == TGSI_PROCESSOR_TESS_EVAL && src->Register.File == TGSI_FILE_INPUT) {
+ int treg = r600_get_temp(ctx);
+ fetch_tes_input(ctx, src, treg);
+ ctx->src[i].sel = treg;
+ ctx->src[i].rel = 0;
+ }
+ if (ctx->type == TGSI_PROCESSOR_TESS_CTRL && src->Register.File == TGSI_FILE_INPUT) {
+ int treg = r600_get_temp(ctx);
+ fetch_tcs_input(ctx, src, treg);
+ ctx->src[i].sel = treg;
+ ctx->src[i].rel = 0;
+ }
+ if (ctx->type == TGSI_PROCESSOR_TESS_CTRL && src->Register.File == TGSI_FILE_OUTPUT) {
+ int treg = r600_get_temp(ctx);
+ fetch_tcs_output(ctx, src, treg);
+ ctx->src[i].sel = treg;
+ ctx->src[i].rel = 0;
+ }
+ }
+ return 0;
+}
+
static int tgsi_split_constant(struct r600_shader_ctx *ctx)
{
struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
@@ -2164,6 +2435,7 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
bool use_llvm = false;
bool indirect_gprs;
bool ring_outputs = false;
+ bool lds_inputs = false;
bool pos_emitted = false;
#ifdef R600_USE_LLVM
@@ -2201,9 +2473,11 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
break;
case TGSI_PROCESSOR_TESS_CTRL:
shader->tcs_prim_mode = key.tcs.prim_mode;
+ lds_inputs = true;
break;
case TGSI_PROCESSOR_TESS_EVAL:
shader->tes_as_es = key.tes.as_es;
+ lds_inputs = true;
if (shader->tes_as_es)
ring_outputs = true;
break;
@@ -2557,9 +2831,13 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
goto out_err;
if ((r = tgsi_split_literal_constant(&ctx)))
goto out_err;
- if (ctx.type == TGSI_PROCESSOR_GEOMETRY)
+ if (ctx.type == TGSI_PROCESSOR_GEOMETRY) {
if ((r = tgsi_split_gs_inputs(&ctx)))
goto out_err;
+ } else if (lds_inputs) {
+ if ((r = tgsi_split_lds_inputs(&ctx)))
+ goto out_err;
+ }
if (ctx.bc->chip_class == CAYMAN)
ctx.inst_info = &cm_shader_tgsi_instruction[opcode];
else if (ctx.bc->chip_class >= EVERGREEN)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 12:27:35 +0000