#! /usr/bin/python2 def type_has_size(type_): return type_[-1:].isdigit() def type_sizes(type_): if type_.endswith("8"): return [8] elif type_.endswith("16"): return [16] elif type_.endswith("32"): return [32] elif type_.endswith("64"): return [64] else: return [32, 64] def type_add_size(type_, size): if type_has_size(type_): return type_ return type_ + str(size) def get_const_field(type_): if type_ == "int32": return "i32" if type_ == "uint32": return "u32" if type_ == "int64": return "i64" if type_ == "uint64": return "u64" if type_ == "bool32": return "u32" if type_ == "float32": return "f32" if type_ == "float64": return "f64" raise Exception(str(type_)) assert(0) template = """\ /* * Copyright (C) 2014 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Jason Ekstrand (jason@jlekstrand.net) */ #include #include "main/core.h" #include "util/rounding.h" /* for _mesa_roundeven */ #include "util/half_float.h" #include "nir_constant_expressions.h" /** * Evaluate one component of packSnorm4x8. */ static uint8_t pack_snorm_1x8(float x) { /* From section 8.4 of the GLSL 4.30 spec: * * packSnorm4x8 * ------------ * The conversion for component c of v to fixed point is done as * follows: * * packSnorm4x8: round(clamp(c, -1, +1) * 127.0) * * We must first cast the float to an int, because casting a negative * float to a uint is undefined. */ return (uint8_t) (int) _mesa_roundevenf(CLAMP(x, -1.0f, +1.0f) * 127.0f); } /** * Evaluate one component of packSnorm2x16. */ static uint16_t pack_snorm_1x16(float x) { /* From section 8.4 of the GLSL ES 3.00 spec: * * packSnorm2x16 * ------------- * The conversion for component c of v to fixed point is done as * follows: * * packSnorm2x16: round(clamp(c, -1, +1) * 32767.0) * * We must first cast the float to an int, because casting a negative * float to a uint is undefined. */ return (uint16_t) (int) _mesa_roundevenf(CLAMP(x, -1.0f, +1.0f) * 32767.0f); } /** * Evaluate one component of unpackSnorm4x8. */ static float unpack_snorm_1x8(uint8_t u) { /* From section 8.4 of the GLSL 4.30 spec: * * unpackSnorm4x8 * -------------- * The conversion for unpacked fixed-point value f to floating point is * done as follows: * * unpackSnorm4x8: clamp(f / 127.0, -1, +1) */ return CLAMP((int8_t) u / 127.0f, -1.0f, +1.0f); } /** * Evaluate one component of unpackSnorm2x16. */ static float unpack_snorm_1x16(uint16_t u) { /* From section 8.4 of the GLSL ES 3.00 spec: * * unpackSnorm2x16 * --------------- * The conversion for unpacked fixed-point value f to floating point is * done as follows: * * unpackSnorm2x16: clamp(f / 32767.0, -1, +1) */ return CLAMP((int16_t) u / 32767.0f, -1.0f, +1.0f); } /** * Evaluate one component packUnorm4x8. */ static uint8_t pack_unorm_1x8(float x) { /* From section 8.4 of the GLSL 4.30 spec: * * packUnorm4x8 * ------------ * The conversion for component c of v to fixed point is done as * follows: * * packUnorm4x8: round(clamp(c, 0, +1) * 255.0) */ return (uint8_t) (int) _mesa_roundevenf(CLAMP(x, 0.0f, 1.0f) * 255.0f); } /** * Evaluate one component packUnorm2x16. */ static uint16_t pack_unorm_1x16(float x) { /* From section 8.4 of the GLSL ES 3.00 spec: * * packUnorm2x16 * ------------- * The conversion for component c of v to fixed point is done as * follows: * * packUnorm2x16: round(clamp(c, 0, +1) * 65535.0) */ return (uint16_t) (int) _mesa_roundevenf(CLAMP(x, 0.0f, 1.0f) * 65535.0f); } /** * Evaluate one component of unpackUnorm4x8. */ static float unpack_unorm_1x8(uint8_t u) { /* From section 8.4 of the GLSL 4.30 spec: * * unpackUnorm4x8 * -------------- * The conversion for unpacked fixed-point value f to floating point is * done as follows: * * unpackUnorm4x8: f / 255.0 */ return (float) u / 255.0f; } /** * Evaluate one component of unpackUnorm2x16. */ static float unpack_unorm_1x16(uint16_t u) { /* From section 8.4 of the GLSL ES 3.00 spec: * * unpackUnorm2x16 * --------------- * The conversion for unpacked fixed-point value f to floating point is * done as follows: * * unpackUnorm2x16: f / 65535.0 */ return (float) u / 65535.0f; } /** * Evaluate one component of packHalf2x16. */ static uint16_t pack_half_1x16(float x) { return _mesa_float_to_half(x); } /** * Evaluate one component of unpackHalf2x16. */ static float unpack_half_1x16(uint16_t u) { return _mesa_half_to_float(u); } /* Some typed vector structures to make things like src0.y work */ typedef float float32_t; typedef double float64_t; typedef bool bool32_t; % for type in ["float", "int", "uint"]: % for width in [32, 64]: struct ${type}${width}_vec { ${type}${width}_t x; ${type}${width}_t y; ${type}${width}_t z; ${type}${width}_t w; }; % endfor % endfor struct bool32_vec { bool x; bool y; bool z; bool w; }; % for name, op in sorted(opcodes.iteritems()): static nir_const_value evaluate_${name}(unsigned num_components, unsigned bit_size, nir_const_value *_src) { nir_const_value _dst_val = { {0, } }; switch (bit_size) { % for bit_size in [32, 64]: case ${bit_size}: { <% output_type = type_add_size(op.output_type, bit_size) input_types = [type_add_size(type_, bit_size) for type_ in op.input_types] %> ## For each non-per-component input, create a variable srcN that ## contains x, y, z, and w elements which are filled in with the ## appropriately-typed values. % for j in range(op.num_inputs): % if op.input_sizes[j] == 0: <% continue %> % elif "src" + str(j) not in op.const_expr: ## Avoid unused variable warnings <% continue %> %endif struct ${input_types[j]}_vec src${j} = { % for k in range(op.input_sizes[j]): % if input_types[j] == "bool32": _src[${j}].u32[${k}] != 0, % else: _src[${j}].${get_const_field(input_types[j])}[${k}], % endif % endfor }; % endfor % if op.output_size == 0: ## For per-component instructions, we need to iterate over the ## components and apply the constant expression one component ## at a time. for (unsigned _i = 0; _i < num_components; _i++) { ## For each per-component input, create a variable srcN that ## contains the value of the current (_i'th) component. % for j in range(op.num_inputs): % if op.input_sizes[j] != 0: <% continue %> % elif "src" + str(j) not in op.const_expr: ## Avoid unused variable warnings <% continue %> % elif input_types[j] == "bool32": bool src${j} = _src[${j}].u32[_i] != 0; % else: ${input_types[j]}_t src${j} = _src[${j}].${get_const_field(input_types[j])}[_i]; % endif % endfor ## Create an appropriately-typed variable dst and assign the ## result of the const_expr to it. If const_expr already contains ## writes to dst, just include const_expr directly. % if "dst" in op.const_expr: ${output_type}_t dst; ${op.const_expr} % else: ${output_type}_t dst = ${op.const_expr}; % endif ## Store the current component of the actual destination to the ## value of dst. % if output_type == "bool32": ## Sanitize the C value to a proper NIR bool _dst_val.u32[_i] = dst ? NIR_TRUE : NIR_FALSE; % else: _dst_val.${get_const_field(output_type)}[_i] = dst; % endif } % else: ## In the non-per-component case, create a struct dst with ## appropriately-typed elements x, y, z, and w and assign the result ## of the const_expr to all components of dst, or include the ## const_expr directly if it writes to dst already. struct ${output_type}_vec dst; % if "dst" in op.const_expr: ${op.const_expr} % else: ## Splat the value to all components. This way expressions which ## write the same value to all components don't need to explicitly ## write to dest. One such example is fnoise which has a ## const_expr of 0.0f. dst.x = dst.y = dst.z = dst.w = ${op.const_expr}; % endif ## For each component in the destination, copy the value of dst to ## the actual destination. % for k in range(op.output_size): % if output_type == "bool32": ## Sanitize the C value to a proper NIR bool _dst_val.u32[${k}] = dst.${"xyzw"[k]} ? NIR_TRUE : NIR_FALSE; % else: _dst_val.${get_const_field(output_type)}[${k}] = dst.${"xyzw"[k]}; % endif % endfor % endif break; } % endfor default: unreachable("unknown bit width"); } return _dst_val; } % endfor nir_const_value nir_eval_const_opcode(nir_op op, unsigned num_components, unsigned bit_width, nir_const_value *src) { switch (op) { % for name in sorted(opcodes.iterkeys()): case nir_op_${name}: { return evaluate_${name}(num_components, bit_width, src); break; } % endfor default: unreachable("shouldn't get here"); } }""" from nir_opcodes import opcodes from mako.template import Template print Template(template).render(opcodes=opcodes, type_sizes=type_sizes, type_has_size=type_has_size, type_add_size=type_add_size, get_const_field=get_const_field)