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r600/shader: add function to get tess constants info

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This function retrieves the tess input/output info
from the tess constant buffer that is bound to the shader.

This uses a vfetch to get the values into the shader.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2015-11-30 15:32:18 +10:00
parent 0696ebc899
commit 2a9639e41f
1 changed files with 90 additions and 1 deletions
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91
src/gallium/drivers/r600/r600_shader.c
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@ -330,6 +330,8 @@ struct r600_shader_ctx {
int gs_export_gpr_tregs[4];
const struct pipe_stream_output_info *gs_stream_output_info;
unsigned enabled_stream_buffers_mask;
unsigned tess_input_info; /* temp with tess input offsets */
unsigned tess_output_info; /* temp with tess input offsets */
};
struct r600_shader_tgsi_instruction {
@ -2048,6 +2050,78 @@ static int emit_gs_ring_writes(struct r600_shader_ctx *ctx, const struct pipe_st
return 0;
}
static int r600_fetch_tess_io_info(struct r600_shader_ctx *ctx)
{
int r;
struct r600_bytecode_vtx vtx;
int temp_val = ctx->temp_reg;
/* need to store the TCS output somewhere */
r = single_alu_op2(ctx, ALU_OP1_MOV,
temp_val, 0,
V_SQ_ALU_SRC_LITERAL, 0,
0, 0);
if (r)
return r;
/* used by VS/TCS */
if (ctx->tess_input_info) {
/* fetch tcs input values into resv space */
memset(&vtx, 0, sizeof(struct r600_bytecode_vtx));
vtx.op = FETCH_OP_VFETCH;
vtx.buffer_id = R600_LDS_INFO_CONST_BUFFER;
vtx.fetch_type = SQ_VTX_FETCH_NO_INDEX_OFFSET;
vtx.mega_fetch_count = 16;
vtx.data_format = FMT_32_32_32_32;
vtx.num_format_all = 2;
vtx.format_comp_all = 1;
vtx.use_const_fields = 0;
vtx.endian = r600_endian_swap(32);
vtx.srf_mode_all = 1;
vtx.offset = 0;
vtx.dst_gpr = ctx->tess_input_info;
vtx.dst_sel_x = 0;
vtx.dst_sel_y = 1;
vtx.dst_sel_z = 2;
vtx.dst_sel_w = 3;
vtx.src_gpr = temp_val;
vtx.src_sel_x = 0;
r = r600_bytecode_add_vtx(ctx->bc, &vtx);
if (r)
return r;
}
/* used by TCS/TES */
if (ctx->tess_output_info) {
/* fetch tcs output values into resv space */
memset(&vtx, 0, sizeof(struct r600_bytecode_vtx));
vtx.op = FETCH_OP_VFETCH;
vtx.buffer_id = R600_LDS_INFO_CONST_BUFFER;
vtx.fetch_type = SQ_VTX_FETCH_NO_INDEX_OFFSET;
vtx.mega_fetch_count = 16;
vtx.data_format = FMT_32_32_32_32;
vtx.num_format_all = 2;
vtx.format_comp_all = 1;
vtx.use_const_fields = 0;
vtx.endian = r600_endian_swap(32);
vtx.srf_mode_all = 1;
vtx.offset = 16;
vtx.dst_gpr = ctx->tess_output_info;
vtx.dst_sel_x = 0;
vtx.dst_sel_y = 1;
vtx.dst_sel_z = 2;
vtx.dst_sel_w = 3;
vtx.src_gpr = temp_val;
vtx.src_sel_x = 0;
r = r600_bytecode_add_vtx(ctx->bc, &vtx);
if (r)
return r;
}
return 0;
}
static int r600_shader_from_tgsi(struct r600_context *rctx,
struct r600_pipe_shader *pipeshader,
union r600_shader_key key)
@ -2211,7 +2285,15 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
ctx.bc->index_reg[0] = ctx.bc->ar_reg + 1;
ctx.bc->index_reg[1] = ctx.bc->ar_reg + 2;
if (ctx.type == TGSI_PROCESSOR_GEOMETRY) {
if (ctx.type == TGSI_PROCESSOR_TESS_CTRL) {
ctx.tess_input_info = ctx.bc->ar_reg + 3;
ctx.tess_output_info = ctx.bc->ar_reg + 4;
ctx.temp_reg = ctx.bc->ar_reg + 5;
} else if (ctx.type == TGSI_PROCESSOR_TESS_EVAL) {
ctx.tess_input_info = 0;
ctx.tess_output_info = ctx.bc->ar_reg + 3;
ctx.temp_reg = ctx.bc->ar_reg + 4;
} else if (ctx.type == TGSI_PROCESSOR_GEOMETRY) {
ctx.gs_export_gpr_tregs[0] = ctx.bc->ar_reg + 3;
ctx.gs_export_gpr_tregs[1] = ctx.bc->ar_reg + 4;
ctx.gs_export_gpr_tregs[2] = ctx.bc->ar_reg + 5;
@ -2249,6 +2331,9 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
if (shader->vs_as_gs_a)
vs_add_primid_output(&ctx, key.vs.prim_id_out);
if (ctx.type == TGSI_PROCESSOR_TESS_EVAL)
r600_fetch_tess_io_info(&ctx);
while (!tgsi_parse_end_of_tokens(&ctx.parse)) {
tgsi_parse_token(&ctx.parse);
switch (ctx.parse.FullToken.Token.Type) {
@ -2424,6 +2509,10 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
return r;
}
}
if (ctx.type == TGSI_PROCESSOR_TESS_CTRL)
r600_fetch_tess_io_info(&ctx);
if (shader->two_side && ctx.colors_used) {
if ((r = process_twoside_color_inputs(&ctx)))
return r;