diff options
Diffstat (limited to 'src/gallium/drivers/r600/r600_shader.c')
| -rw-r--r-- | src/gallium/drivers/r600/r600_shader.c | 167 |
1 files changed, 166 insertions, 1 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index 4210c3af685..fece8073452 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -2564,6 +2564,168 @@ static int r600_store_tcs_output(struct r600_shader_ctx *ctx) return 0; } +static int r600_tess_factor_read(struct r600_shader_ctx *ctx, + int output_idx) +{ + int param; + unsigned temp_reg = r600_get_temp(ctx); + unsigned name = ctx->shader->output[output_idx].name; + int dreg = ctx->shader->output[output_idx].gpr; + int r; + + param = r600_get_lds_unique_index(name, 0); + r = get_lds_offset0(ctx, 1, temp_reg, true); + if (r) + return r; + + 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; + + do_lds_fetch_values(ctx, temp_reg, dreg); + return 0; +} + +static int r600_emit_tess_factor(struct r600_shader_ctx *ctx) +{ + int i; + int stride, outer_comps, inner_comps; + int tessinner_idx = -1, tessouter_idx = -1; + int r; + int temp_reg = r600_get_temp(ctx); + int treg[3] = {-1, -1, -1}; + struct r600_bytecode_alu alu; + struct r600_bytecode_cf *cf_jump, *cf_pop; + + /* only execute factor emission for invocation 0 */ + /* PRED_SETE_INT __, R0.x, 0 */ + memset(&alu, 0, sizeof(alu)); + alu.op = ALU_OP2_PRED_SETE_INT; + alu.src[0].chan = 2; + alu.src[1].sel = V_SQ_ALU_SRC_LITERAL; + alu.execute_mask = 1; + alu.update_pred = 1; + alu.last = 1; + r600_bytecode_add_alu_type(ctx->bc, &alu, CF_OP_ALU_PUSH_BEFORE); + + r600_bytecode_add_cfinst(ctx->bc, CF_OP_JUMP); + cf_jump = ctx->bc->cf_last; + + treg[0] = r600_get_temp(ctx); + switch (ctx->shader->tcs_prim_mode) { + case PIPE_PRIM_LINES: + stride = 8; /* 2 dwords, 1 vec2 store */ + outer_comps = 2; + inner_comps = 0; + break; + case PIPE_PRIM_TRIANGLES: + stride = 16; /* 4 dwords, 1 vec4 store */ + outer_comps = 3; + inner_comps = 1; + treg[1] = r600_get_temp(ctx); + break; + case PIPE_PRIM_QUADS: + stride = 24; /* 6 dwords, 2 stores (vec4 + vec2) */ + outer_comps = 4; + inner_comps = 2; + treg[1] = r600_get_temp(ctx); + treg[2] = r600_get_temp(ctx); + break; + default: + assert(0); + return -1; + } + + /* R0 is InvocationID, RelPatchID, PatchID, tf_base */ + /* TF_WRITE takes index in R.x, value in R.y */ + for (i = 0; i < ctx->shader->noutput; i++) { + if (ctx->shader->output[i].name == TGSI_SEMANTIC_TESSINNER) + tessinner_idx = i; + if (ctx->shader->output[i].name == TGSI_SEMANTIC_TESSOUTER) + tessouter_idx = i; + } + + if (tessouter_idx == -1) + return -1; + + if (tessinner_idx == -1 && inner_comps) + return -1; + + if (tessouter_idx != -1) { + r = r600_tess_factor_read(ctx, tessouter_idx); + if (r) + return r; + } + + if (tessinner_idx != -1) { + r = r600_tess_factor_read(ctx, tessinner_idx); + if (r) + return r; + } + + /* r.x = tf_base(r0.w) + relpatchid(r0.y) * tf_stride */ + /* r.x = relpatchid(r0.y) * tf_stride */ + + /* multiply incoming r0.y * stride - t.x = r0.y * stride */ + /* add incoming r0.w to it: t.x = t.x + r0.w */ + r = single_alu_op3(ctx, ALU_OP3_MULADD_UINT24, + temp_reg, 0, + 0, 1, + V_SQ_ALU_SRC_LITERAL, stride, + 0, 3); + if (r) + return r; + + for (i = 0; i < outer_comps + inner_comps; i++) { + int out_idx = i >= outer_comps ? tessinner_idx : tessouter_idx; + int out_comp = i >= outer_comps ? i - outer_comps : i; + + r = single_alu_op2(ctx, ALU_OP2_ADD_INT, + treg[i / 2], (2 * (i % 2)), + temp_reg, 0, + V_SQ_ALU_SRC_LITERAL, 4 * i); + if (r) + return r; + r = single_alu_op2(ctx, ALU_OP1_MOV, + treg[i / 2], 1 + (2 * (i%2)), + ctx->shader->output[out_idx].gpr, out_comp, + 0, 0); + if (r) + return r; + } + for (i = 0; i < outer_comps + inner_comps; i++) { + struct r600_bytecode_gds gds; + + memset(&gds, 0, sizeof(struct r600_bytecode_gds)); + gds.src_gpr = treg[i / 2]; + gds.src_sel_x = 2 * (i % 2); + gds.src_sel_y = 1 + (2 * (i % 2)); + gds.src_sel_z = 4; + gds.dst_sel_x = 7; + gds.dst_sel_y = 7; + gds.dst_sel_z = 7; + gds.dst_sel_w = 7; + gds.op = FETCH_OP_TF_WRITE; + r = r600_bytecode_add_gds(ctx->bc, &gds); + if (r) + return r; + } + + // Patch up jump label + r600_bytecode_add_cfinst(ctx->bc, CF_OP_POP); + cf_pop = ctx->bc->cf_last; + + cf_jump->cf_addr = cf_pop->id + 2; + cf_jump->pop_count = 1; + cf_pop->cf_addr = cf_pop->id + 2; + cf_pop->pop_count = 1; + + return 0; +} + static int r600_shader_from_tgsi(struct r600_context *rctx, struct r600_pipe_shader *pipeshader, union r600_shader_key key) @@ -3076,6 +3238,9 @@ static int r600_shader_from_tgsi(struct r600_context *rctx, pipeshader->enabled_stream_buffers_mask = ctx.enabled_stream_buffers_mask; convert_edgeflag_to_int(&ctx); + if (ctx.type == TGSI_PROCESSOR_TESS_CTRL) + r600_emit_tess_factor(&ctx); + if (lds_outputs) { if (ctx.type == TGSI_PROCESSOR_VERTEX) { if (ctx.shader->noutput) @@ -3341,7 +3506,7 @@ static int r600_shader_from_tgsi(struct r600_context *rctx, last = r600_isa_cf(ctx.bc->cf_last->op); /* alu clause instructions don't have EOP bit, so add NOP */ - if (!last || last->flags & CF_ALU || ctx.bc->cf_last->op == CF_OP_LOOP_END || ctx.bc->cf_last->op == CF_OP_CALL_FS) + if (!last || last->flags & CF_ALU || ctx.bc->cf_last->op == CF_OP_LOOP_END || ctx.bc->cf_last->op == CF_OP_CALL_FS || ctx.bc->cf_last->op == CF_OP_POP || ctx.bc->cf_last->op == CF_OP_GDS) r600_bytecode_add_cfinst(ctx.bc, CF_OP_NOP); ctx.bc->cf_last->end_of_program = 1; |