/** Which texture units are doing shadow comparison in the FS code */
unsigned shadow_compare_units;
+
+ unsigned sample_id_sys_index; /**< TGSI index of sample id sys value */
+
+ unsigned sample_pos_sys_index; /**< TGSI index of sample pos sys value */
+ unsigned sample_pos_tmp_index; /**< which temp reg has the sample pos */
} fs;
/* For geometry shaders only */
return VGPU10_OPCODE_LT;
case TGSI_OPCODE_ROUND:
return VGPU10_OPCODE_ROUND_NE;
+ case TGSI_OPCODE_SAMPLE_POS:
+ /* Note: we never actually get this opcode because there's no GLSL
+ * function to query multisample resource sample positions. There's
+ * only the TGSI_SEMANTIC_SAMPLEPOS system value which contains the
+ * position of the current sample in the render target.
+ */
+ /* FALL-THROUGH */
+ case TGSI_OPCODE_SAMPLE_INFO:
+ /* NOTE: we never actually get this opcode because the GLSL compiler
+ * implements the gl_NumSamples variable with a simple constant in the
+ * constant buffer.
+ */
+ /* FALL-THROUGH */
default:
assert(!"Unexpected TGSI opcode in translate_opcode()");
return VGPU10_OPCODE_NOP;
/**
* Translate a src register of a TGSI instruction and emit VGPU10 tokens.
+ * In quite a few cases, we do register substitution. For example, if
+ * the TGSI register is the front/back-face register, we replace that with
+ * a temp register containing a value we computed earlier.
*/
static void
emit_src_register(struct svga_shader_emitter_v10 *emit,
index = emit->linkage.input_map[index];
}
}
+ else if (file == TGSI_FILE_SYSTEM_VALUE) {
+ if (index == emit->fs.sample_pos_sys_index) {
+ assert(emit->version >= 41);
+ /* Current sample position is in a temp register */
+ file = TGSI_FILE_TEMPORARY;
+ index = emit->fs.sample_pos_tmp_index;
+ }
+ else {
+ /* Map the TGSI system value to a VGPU10 input register */
+ assert(index < ARRAY_SIZE(emit->system_value_indexes));
+ file = TGSI_FILE_INPUT;
+ index = emit->system_value_indexes[index];
+ }
+ }
}
else if (emit->unit == PIPE_SHADER_GEOMETRY) {
if (file == TGSI_FILE_INPUT) {
}
+/**
+ * Emit tokens for the "rasterizer" register used by the SAMPLE_POS
+ * instruction.
+ */
+static void
+emit_rasterizer_register(struct svga_shader_emitter_v10 *emit)
+{
+ VGPU10OperandToken0 operand0;
+
+ /* init */
+ operand0.value = 0;
+
+ /* No register index for rasterizer index (there's only one) */
+ operand0.operandType = VGPU10_OPERAND_TYPE_RASTERIZER;
+ operand0.indexDimension = VGPU10_OPERAND_INDEX_0D;
+ operand0.numComponents = VGPU10_OPERAND_4_COMPONENT;
+ operand0.selectionMode = VGPU10_OPERAND_4_COMPONENT_SWIZZLE_MODE;
+ operand0.swizzleX = VGPU10_COMPONENT_X;
+ operand0.swizzleY = VGPU10_COMPONENT_Y;
+ operand0.swizzleZ = VGPU10_COMPONENT_Z;
+ operand0.swizzleW = VGPU10_COMPONENT_W;
+
+ emit_dword(emit, operand0.value);
+}
+
+
/**
* Emit the token for a VGPU10 opcode.
* \param saturate clamp result to [0,1]?
}
+/**
+ * Create a tgsi_full_src_register with a swizzle such that all four
+ * vector components have the same scalar value.
+ */
+static struct tgsi_full_src_register
+make_src_scalar_reg(enum tgsi_file_type file, unsigned index, unsigned component)
+{
+ struct tgsi_full_src_register reg;
+
+ assert(component >= TGSI_SWIZZLE_X);
+ assert(component <= TGSI_SWIZZLE_W);
+
+ memset(®, 0, sizeof(reg));
+ reg.Register.File = file;
+ reg.Register.Index = index;
+ reg.Register.SwizzleX =
+ reg.Register.SwizzleY =
+ reg.Register.SwizzleZ =
+ reg.Register.SwizzleW = component;
+ return reg;
+}
+
+
/**
* Create a tgsi_full_src_register for a temporary.
*/
assert(opcodeType == VGPU10_OPCODE_DCL_INPUT ||
opcodeType == VGPU10_OPCODE_DCL_INPUT_SIV ||
opcodeType == VGPU10_OPCODE_DCL_INPUT_PS ||
+ opcodeType == VGPU10_OPCODE_DCL_INPUT_PS_SIV ||
opcodeType == VGPU10_OPCODE_DCL_INPUT_PS_SGV);
assert(operandType == VGPU10_OPERAND_TYPE_INPUT ||
operandType == VGPU10_OPERAND_TYPE_INPUT_PRIMITIVEID);
name == VGPU10_NAME_INSTANCE_ID ||
name == VGPU10_NAME_VERTEX_ID ||
name == VGPU10_NAME_PRIMITIVE_ID ||
- name == VGPU10_NAME_IS_FRONT_FACE);
+ name == VGPU10_NAME_IS_FRONT_FACE ||
+ name == VGPU10_NAME_SAMPLE_INDEX);
+
assert(interpMode == VGPU10_INTERPOLATION_UNDEFINED ||
interpMode == VGPU10_INTERPOLATION_CONSTANT ||
interpMode == VGPU10_INTERPOLATION_LINEAR ||
VGPU10_OPERAND_4_COMPONENT_MASK_X,
VGPU10_INTERPOLATION_UNDEFINED);
break;
+ case TGSI_SEMANTIC_SAMPLEID:
+ assert(emit->unit == PIPE_SHADER_FRAGMENT);
+ emit->fs.sample_id_sys_index = index;
+ index = alloc_system_value_index(emit, index);
+ emit_input_declaration(emit, VGPU10_OPCODE_DCL_INPUT_PS_SIV,
+ VGPU10_OPERAND_TYPE_INPUT,
+ VGPU10_OPERAND_INDEX_1D,
+ index, 1,
+ VGPU10_NAME_SAMPLE_INDEX,
+ VGPU10_OPERAND_4_COMPONENT,
+ VGPU10_OPERAND_4_COMPONENT_MASK_MODE,
+ VGPU10_OPERAND_4_COMPONENT_MASK_X,
+ VGPU10_INTERPOLATION_CONSTANT);
+ break;
+ case TGSI_SEMANTIC_SAMPLEPOS:
+ /* This system value contains the position of the current sample
+ * when using per-sample shading. We implement this by calling
+ * the VGPU10_OPCODE_SAMPLE_POS instruction with the current sample
+ * index as the argument. See emit_sample_position_instructions().
+ */
+ assert(emit->version >= 41);
+ index = alloc_system_value_index(emit, index);
+ emit->fs.sample_pos_sys_index = index;
+ break;
default:
- ; /* XXX */
+ debug_printf("unexpected sytem value semantic index %u\n",
+ semantic_name);
}
}
interpolationMode = VGPU10_INTERPOLATION_CONSTANT;
name = VGPU10_NAME_PRIMITIVE_ID;
}
+ else if (semantic_name == TGSI_SEMANTIC_SAMPLEID) {
+ /* sample index / ID */
+ type = VGPU10_OPCODE_DCL_INPUT_PS_SGV;
+ interpolationMode = VGPU10_INTERPOLATION_CONSTANT;
+ name = VGPU10_NAME_SAMPLE_INDEX;
+ }
else {
/* general fragment input */
type = VGPU10_OPCODE_DCL_INPUT_PS;
emit->fs.fragcoord_tmp_index = total_temps;
total_temps += 1;
}
+
+ if (emit->fs.sample_pos_sys_index != INVALID_INDEX) {
+ /* Allocate a temp for the sample position */
+ emit->fs.sample_pos_tmp_index = total_temps++;
+ }
}
for (i = 0; i < emit->num_address_regs; i++) {
}
+/**
+ * Emit the extra code to get the current sample position value and
+ * put it into a temp register.
+ */
+static void
+emit_sample_position_instructions(struct svga_shader_emitter_v10 *emit)
+{
+ assert(emit->unit == PIPE_SHADER_FRAGMENT);
+
+ if (emit->fs.sample_pos_sys_index != INVALID_INDEX) {
+ assert(emit->version >= 41);
+
+ struct tgsi_full_dst_register tmp_dst =
+ make_dst_temp_reg(emit->fs.sample_pos_tmp_index);
+ struct tgsi_full_src_register half =
+ make_immediate_reg_float4(emit, 0.5, 0.5, 0.0, 0.0);
+
+ struct tgsi_full_src_register tmp_src =
+ make_src_temp_reg(emit->fs.sample_pos_tmp_index);
+ struct tgsi_full_src_register sample_index_reg =
+ make_src_scalar_reg(TGSI_FILE_SYSTEM_VALUE,
+ emit->fs.sample_id_sys_index, TGSI_SWIZZLE_X);
+
+ /* The first src register is a shader resource (if we want a
+ * multisampled resource sample position) or the rasterizer register
+ * (if we want the current sample position in the color buffer). We
+ * want the later.
+ */
+
+ /* SAMPLE_POS dst, RASTERIZER, sampleIndex */
+ begin_emit_instruction(emit);
+ emit_opcode(emit, VGPU10_OPCODE_SAMPLE_POS, FALSE);
+ emit_dst_register(emit, &tmp_dst);
+ emit_rasterizer_register(emit);
+ emit_src_register(emit, &sample_index_reg);
+ end_emit_instruction(emit);
+
+ /* Convert from D3D coords to GL coords by adding 0.5 bias */
+ /* ADD dst, dst, half */
+ begin_emit_instruction(emit);
+ emit_opcode(emit, VGPU10_OPCODE_ADD, FALSE);
+ emit_dst_register(emit, &tmp_dst);
+ emit_src_register(emit, &tmp_src);
+ emit_src_register(emit, &half);
+ end_emit_instruction(emit);
+ }
+}
+
+
/**
* Emit extra instructions to adjust VS inputs/attributes. This can
* mean casting a vertex attribute from int to float or setting the
if (emit->unit == PIPE_SHADER_FRAGMENT) {
emit_frontface_instructions(emit);
emit_fragcoord_instructions(emit);
+ emit_sample_position_instructions(emit);
}
else if (emit->unit == PIPE_SHADER_VERTEX) {
emit_vertex_attrib_instructions(emit);
emit->fs.color_tmp_index = INVALID_INDEX;
emit->fs.face_input_index = INVALID_INDEX;
emit->fs.fragcoord_input_index = INVALID_INDEX;
+ emit->fs.sample_id_sys_index = INVALID_INDEX;
+ emit->fs.sample_pos_sys_index = INVALID_INDEX;
emit->gs.prim_id_index = INVALID_INDEX;
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