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IABSD.fr/xenocara/lib/mesa/src/intel/compiler/brw_builder.h
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- lib/mesa/src/intel/compiler/brw_builder.h
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/* -*- c++ -*- */ /* * Copyright © 2010-2015 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. */ #pragma once #include "brw_ir_fs.h" #include "brw_eu.h" #include "brw_fs.h" static inline brw_reg offset(const brw_reg &, const brw_builder &, unsigned); /** * Toolbox to assemble an BRW IR program out of individual instructions. */ class brw_builder { public: /** * Construct an brw_builder that inserts instructions into \p shader. * \p dispatch_width gives the native execution width of the program. */ brw_builder(fs_visitor *shader, unsigned dispatch_width) : shader(shader), block(NULL), cursor(NULL), _dispatch_width(dispatch_width), _group(0), force_writemask_all(false), annotation() { } explicit brw_builder(fs_visitor *s) : brw_builder(s, s->dispatch_width) {} /** * Construct an brw_builder that inserts instructions into \p shader * before instruction \p inst in basic block \p block. The default * execution controls and debug annotation are initialized from the * instruction passed as argument. */ brw_builder(fs_visitor *shader, bblock_t *block, fs_inst *inst) : shader(shader), block(block), cursor(inst), _dispatch_width(inst->exec_size), _group(inst->group), force_writemask_all(inst->force_writemask_all) { #ifndef NDEBUG annotation.str = inst->annotation; #else annotation.str = NULL; #endif } /** * Construct an brw_builder that inserts instructions before \p cursor in * basic block \p block, inheriting other code generation parameters * from this. */ brw_builder at(bblock_t *block, exec_node *cursor) const { brw_builder bld = *this; bld.block = block; bld.cursor = cursor; return bld; } /** * Construct an brw_builder appending instructions at the end of the * instruction list of the shader, inheriting other code generation * parameters from this. */ brw_builder at_end() const { return at(NULL, (exec_node *)&shader->instructions.tail_sentinel); } /** * Construct a builder specifying the default SIMD width and group of * channel enable signals, inheriting other code generation parameters * from this. * * \p n gives the default SIMD width, \p i gives the slot group used for * predication and control flow masking in multiples of \p n channels. */ brw_builder group(unsigned n, unsigned i) const { brw_builder bld = *this; if (n <= dispatch_width() && i < dispatch_width() / n) { bld._group += i * n; } else { /* The requested channel group isn't a subset of the channel group * of this builder, which means that the resulting instructions * would use (potentially undefined) channel enable signals not * specified by the parent builder. That's only valid if the * instruction doesn't have per-channel semantics, in which case * we should clear off the default group index in order to prevent * emitting instructions with channel group not aligned to their * own execution size. */ assert(force_writemask_all); bld._group = 0; } bld._dispatch_width = n; return bld; } /** * Alias for group() with width equal to eight. */ brw_builder quarter(unsigned i) const { return group(8, i); } /** * Construct a builder with per-channel control flow execution masking * disabled if \p b is true. If control flow execution masking is * already disabled this has no effect. */ brw_builder exec_all(bool b = true) const { brw_builder bld = *this; if (b) bld.force_writemask_all = true; return bld; } /** * Construct a builder for SIMD8-as-scalar */ brw_builder scalar_group() const { return exec_all().group(8 * reg_unit(shader->devinfo), 0); } /** * Construct a builder with the given debug annotation info. */ brw_builder annotate(const char *str) const { brw_builder bld = *this; bld.annotation.str = str; return bld; } /** * Get the SIMD width in use. */ unsigned dispatch_width() const { return _dispatch_width; } /** * Get the channel group in use. */ unsigned group() const { return _group; } /** * Allocate a virtual register of natural vector size (one for this IR) * and SIMD width. \p n gives the amount of space to allocate in * dispatch_width units (which is just enough space for one logical * component in this IR). */ brw_reg vgrf(enum brw_reg_type type, unsigned n = 1) const { const unsigned unit = reg_unit(shader->devinfo); assert(dispatch_width() <= 32); if (n > 0) return brw_vgrf(shader->alloc.allocate( DIV_ROUND_UP(n * brw_type_size_bytes(type) * dispatch_width(), unit * REG_SIZE) * unit), type); else return retype(null_reg_ud(), type); } brw_reg vaddr(enum brw_reg_type type, unsigned subnr) const { brw_reg addr = brw_address_reg(subnr); addr.nr = shader->next_address_register_nr++; return retype(addr, type); } /** * Create a null register of floating type. */ brw_reg null_reg_f() const { return brw_reg(retype(brw_null_reg(), BRW_TYPE_F)); } brw_reg null_reg_df() const { return brw_reg(retype(brw_null_reg(), BRW_TYPE_DF)); } /** * Create a null register of signed integer type. */ brw_reg null_reg_d() const { return brw_reg(retype(brw_null_reg(), BRW_TYPE_D)); } /** * Create a null register of unsigned integer type. */ brw_reg null_reg_ud() const { return brw_reg(retype(brw_null_reg(), BRW_TYPE_UD)); } /** * Insert an instruction into the program. */ fs_inst * emit(const fs_inst &inst) const { return emit(new(shader->mem_ctx) fs_inst(inst)); } /** * Create and insert a nullary control instruction into the program. */ fs_inst * emit(enum opcode opcode) const { return emit(fs_inst(opcode, dispatch_width())); } /** * Create and insert a nullary instruction into the program. */ fs_inst * emit(enum opcode opcode, const brw_reg &dst) const { return emit(fs_inst(opcode, dispatch_width(), dst)); } /** * Create and insert a unary instruction into the program. */ fs_inst * emit(enum opcode opcode, const brw_reg &dst, const brw_reg &src0) const { return emit(fs_inst(opcode, dispatch_width(), dst, src0)); } /** * Create and insert a binary instruction into the program. */ fs_inst * emit(enum opcode opcode, const brw_reg &dst, const brw_reg &src0, const brw_reg &src1) const { return emit(fs_inst(opcode, dispatch_width(), dst, src0, src1)); } /** * Create and insert a ternary instruction into the program. */ fs_inst * emit(enum opcode opcode, const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, const brw_reg &src2) const { switch (opcode) { case BRW_OPCODE_BFE: case BRW_OPCODE_BFI2: case BRW_OPCODE_MAD: case BRW_OPCODE_LRP: return emit(fs_inst(opcode, dispatch_width(), dst, fix_3src_operand(src0), fix_3src_operand(src1), fix_3src_operand(src2))); default: return emit(fs_inst(opcode, dispatch_width(), dst, src0, src1, src2)); } } /** * Create and insert an instruction with a variable number of sources * into the program. */ fs_inst * emit(enum opcode opcode, const brw_reg &dst, const brw_reg srcs[], unsigned n) const { /* Use the emit() methods for specific operand counts to ensure that * opcode-specific operand fixups occur. */ if (n == 3) { return emit(opcode, dst, srcs[0], srcs[1], srcs[2]); } else { return emit(fs_inst(opcode, dispatch_width(), dst, srcs, n)); } } /** * Insert a preallocated instruction into the program. */ fs_inst * emit(fs_inst *inst) const { assert(inst->exec_size <= 32); assert(inst->exec_size == dispatch_width() || force_writemask_all); inst->group = _group; inst->force_writemask_all = force_writemask_all; #ifndef NDEBUG inst->annotation = annotation.str; #endif if (block) static_cast<fs_inst *>(cursor)->insert_before(block, inst); else cursor->insert_before(inst); return inst; } /** * Select \p src0 if the comparison of both sources with the given * conditional mod evaluates to true, otherwise select \p src1. * * Generally useful to get the minimum or maximum of two values. */ fs_inst * emit_minmax(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, brw_conditional_mod mod) const { assert(mod == BRW_CONDITIONAL_GE || mod == BRW_CONDITIONAL_L); /* In some cases we can't have bytes as operand for src1, so use the * same type for both operand. */ return set_condmod(mod, SEL(dst, fix_unsigned_negate(src0), fix_unsigned_negate(src1))); } /** * Copy any live channel from \p src to the first channel of the result. */ brw_reg emit_uniformize(const brw_reg &src) const { /* Trivial: skip unnecessary work and retain IMM */ if (src.file == IMM) return src; /* FIXME: We use a vector chan_index and dst to allow constant and * copy propagration to move result all the way into the consuming * instruction (typically a surface index or sampler index for a * send). Once we teach const/copy propagation about scalars we * should go back to scalar destinations here. */ const brw_builder xbld = scalar_group(); const brw_reg chan_index = xbld.vgrf(BRW_TYPE_UD); /* FIND_LIVE_CHANNEL will only write a single component after * lowering. Munge size_written here to match the allocated size of * chan_index. */ exec_all().emit(SHADER_OPCODE_FIND_LIVE_CHANNEL, chan_index) ->size_written = chan_index.component_size(xbld.dispatch_width()); return BROADCAST(src, component(chan_index, 0)); } brw_reg move_to_vgrf(const brw_reg &src, unsigned num_components) const { brw_reg *const src_comps = new brw_reg[num_components]; for (unsigned i = 0; i < num_components; i++) src_comps[i] = offset(src, *this, i); const brw_reg dst = vgrf(src.type, num_components); LOAD_PAYLOAD(dst, src_comps, num_components, 0); delete[] src_comps; return brw_reg(dst); } fs_inst * emit_undef_for_dst(const fs_inst *old_inst) const { assert(old_inst->dst.file == VGRF); fs_inst *inst = emit(SHADER_OPCODE_UNDEF, retype(old_inst->dst, BRW_TYPE_UD)); inst->size_written = old_inst->size_written; return inst; } /** * Assorted arithmetic ops. * @{ */ #define _ALU1(prefix, op) \ fs_inst * \ op(const brw_reg &dst, const brw_reg &src0) const \ { \ assert(_dispatch_width == 1 || \ (dst.file >= VGRF && dst.stride != 0) || \ (dst.file < VGRF && dst.hstride != 0)); \ return emit(prefix##op, dst, src0); \ } \ brw_reg \ op(const brw_reg &src0, fs_inst **out = NULL) const \ { \ fs_inst *inst = op(vgrf(src0.type), src0); \ if (out) *out = inst; \ return inst->dst; \ } #define ALU1(op) _ALU1(BRW_OPCODE_, op) #define VIRT1(op) _ALU1(SHADER_OPCODE_, op) fs_inst * alu2(opcode op, const brw_reg &dst, const brw_reg &src0, const brw_reg &src1) const { return emit(op, dst, src0, src1); } brw_reg alu2(opcode op, const brw_reg &src0, const brw_reg &src1, fs_inst **out = NULL) const { enum brw_reg_type inferred_dst_type = brw_type_larger_of(src0.type, src1.type); fs_inst *inst = alu2(op, vgrf(inferred_dst_type), src0, src1); if (out) *out = inst; return inst->dst; } #define _ALU2(prefix, op) \ fs_inst * \ op(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1) const \ { \ return alu2(prefix##op, dst, src0, src1); \ } \ brw_reg \ op(const brw_reg &src0, const brw_reg &src1, fs_inst **out = NULL) const \ { \ return alu2(prefix##op, src0, src1, out); \ } #define ALU2(op) _ALU2(BRW_OPCODE_, op) #define VIRT2(op) _ALU2(SHADER_OPCODE_, op) #define ALU2_ACC(op) \ fs_inst * \ op(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1) const \ { \ fs_inst *inst = emit(BRW_OPCODE_##op, dst, src0, src1); \ inst->writes_accumulator = true; \ return inst; \ } #define ALU3(op) \ fs_inst * \ op(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, \ const brw_reg &src2) const \ { \ return emit(BRW_OPCODE_##op, dst, src0, src1, src2); \ } \ brw_reg \ op(const brw_reg &src0, const brw_reg &src1, const brw_reg &src2, \ fs_inst **out = NULL) const \ { \ enum brw_reg_type inferred_dst_type = \ brw_type_larger_of(brw_type_larger_of(src0.type, src1.type),\ src2.type); \ fs_inst *inst = op(vgrf(inferred_dst_type), src0, src1, src2); \ if (out) *out = inst; \ return inst->dst; \ } ALU3(ADD3) ALU2_ACC(ADDC) ALU2(AND) ALU2(ASR) ALU2(AVG) ALU3(BFE) ALU2(BFI1) ALU3(BFI2) ALU1(BFREV) ALU1(CBIT) ALU2(DP2) ALU2(DP3) ALU2(DP4) ALU2(DPH) ALU1(FBH) ALU1(FBL) ALU1(FRC) ALU3(DP4A) ALU2(LINE) ALU1(LZD) ALU2(MAC) ALU2_ACC(MACH) ALU3(MAD) ALU1(MOV) ALU2(MUL) ALU1(NOT) ALU2(OR) ALU2(PLN) ALU1(RNDD) ALU1(RNDE) ALU1(RNDU) ALU1(RNDZ) ALU2(ROL) ALU2(ROR) ALU2(SEL) ALU2(SHL) ALU2(SHR) ALU2_ACC(SUBB) ALU2(XOR) VIRT1(RCP) VIRT1(RSQ) VIRT1(SQRT) VIRT1(EXP2) VIRT1(LOG2) VIRT2(POW) VIRT2(INT_QUOTIENT) VIRT2(INT_REMAINDER) VIRT1(SIN) VIRT1(COS) #undef ALU3 #undef ALU2_ACC #undef ALU2 #undef VIRT2 #undef _ALU2 #undef ALU1 #undef VIRT1 #undef _ALU1 /** @} */ fs_inst * ADD(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1) const { return alu2(BRW_OPCODE_ADD, dst, src0, src1); } brw_reg ADD(const brw_reg &src0, const brw_reg &src1, fs_inst **out = NULL) const { if (src1.file == IMM && src1.ud == 0 && !out) return src0; return alu2(BRW_OPCODE_ADD, src0, src1, out); } /** * CMP: Sets the low bit of the destination channels with the result * of the comparison, while the upper bits are undefined, and updates * the flag register with the packed 16 bits of the result. */ fs_inst * CMP(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, brw_conditional_mod condition) const { /* Take the instruction: * * CMP null<d> src0<f> src1<f> * * Original gfx4 does type conversion to the destination type * before comparison, producing garbage results for floating * point comparisons. */ const enum brw_reg_type type = dst.is_null() ? src0.type : brw_type_with_size(src0.type, brw_type_size_bits(dst.type)); return set_condmod(condition, emit(BRW_OPCODE_CMP, retype(dst, type), fix_unsigned_negate(src0), fix_unsigned_negate(src1))); } /** * CMPN: Behaves like CMP, but produces true if src1 is NaN. */ fs_inst * CMPN(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, brw_conditional_mod condition) const { /* Take the instruction: * * CMP null<d> src0<f> src1<f> * * Original gfx4 does type conversion to the destination type * before comparison, producing garbage results for floating * point comparisons. */ const enum brw_reg_type type = dst.is_null() ? src0.type : brw_type_with_size(src0.type, brw_type_size_bits(dst.type)); return set_condmod(condition, emit(BRW_OPCODE_CMPN, retype(dst, type), fix_unsigned_negate(src0), fix_unsigned_negate(src1))); } /** * Gfx4 predicated IF. */ fs_inst * IF(brw_predicate predicate) const { return set_predicate(predicate, emit(BRW_OPCODE_IF)); } /** * CSEL: dst = src2 <op> 0.0f ? src0 : src1 */ fs_inst * CSEL(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, const brw_reg &src2, brw_conditional_mod condition) const { return set_condmod(condition, emit(BRW_OPCODE_CSEL, retype(dst, src2.type), retype(src0, src2.type), retype(src1, src2.type), src2)); } /** * Emit a linear interpolation instruction. */ fs_inst * LRP(const brw_reg &dst, const brw_reg &x, const brw_reg &y, const brw_reg &a) const { if (shader->devinfo->ver <= 10) { /* The LRP instruction actually does op1 * op0 + op2 * (1 - op0), so * we need to reorder the operands. */ return emit(BRW_OPCODE_LRP, dst, a, y, x); } else { /* We can't use the LRP instruction. Emit x*(1-a) + y*a. */ const brw_reg y_times_a = vgrf(dst.type); const brw_reg one_minus_a = vgrf(dst.type); const brw_reg x_times_one_minus_a = vgrf(dst.type); MUL(y_times_a, y, a); ADD(one_minus_a, negate(a), brw_imm_f(1.0f)); MUL(x_times_one_minus_a, x, brw_reg(one_minus_a)); return ADD(dst, brw_reg(x_times_one_minus_a), brw_reg(y_times_a)); } } /** * Collect a number of registers in a contiguous range of registers. */ fs_inst * LOAD_PAYLOAD(const brw_reg &dst, const brw_reg *src, unsigned sources, unsigned header_size) const { fs_inst *inst = emit(SHADER_OPCODE_LOAD_PAYLOAD, dst, src, sources); inst->header_size = header_size; inst->size_written = header_size * REG_SIZE; for (unsigned i = header_size; i < sources; i++) { inst->size_written += dispatch_width() * brw_type_size_bytes(src[i].type) * dst.stride; } return inst; } fs_inst * VEC(const brw_reg &dst, const brw_reg *src, unsigned sources) const { return sources == 1 ? MOV(dst, src[0]) : LOAD_PAYLOAD(dst, src, sources, 0); } fs_inst * SYNC(enum tgl_sync_function sync) const { return emit(BRW_OPCODE_SYNC, null_reg_ud(), brw_imm_ud(sync)); } fs_inst * UNDEF(const brw_reg &dst) const { assert(dst.file == VGRF); assert(dst.offset % REG_SIZE == 0); fs_inst *inst = emit(SHADER_OPCODE_UNDEF, retype(dst, BRW_TYPE_UD)); inst->size_written = shader->alloc.sizes[dst.nr] * REG_SIZE - dst.offset; return inst; } fs_inst * DPAS(const brw_reg &dst, const brw_reg &src0, const brw_reg &src1, const brw_reg &src2, unsigned sdepth, unsigned rcount) const { assert(_dispatch_width == 8 * reg_unit(shader->devinfo)); assert(sdepth == 8); assert(rcount == 1 || rcount == 2 || rcount == 4 || rcount == 8); fs_inst *inst = emit(BRW_OPCODE_DPAS, dst, src0, src1, src2); inst->sdepth = sdepth; inst->rcount = rcount; if (dst.type == BRW_TYPE_HF) { inst->size_written = reg_unit(shader->devinfo) * rcount * REG_SIZE / 2; } else { inst->size_written = reg_unit(shader->devinfo) * rcount * REG_SIZE; } return inst; } void VARYING_PULL_CONSTANT_LOAD(const brw_reg &dst, const brw_reg &surface, const brw_reg &surface_handle, const brw_reg &varying_offset, uint32_t const_offset, uint8_t alignment, unsigned components) const { assert(components <= 4); /* We have our constant surface use a pitch of 4 bytes, so our index can * be any component of a vector, and then we load 4 contiguous * components starting from that. TODO: Support loading fewer than 4. */ brw_reg total_offset = ADD(varying_offset, brw_imm_ud(const_offset)); /* The pull load message will load a vec4 (16 bytes). If we are loading * a double this means we are only loading 2 elements worth of data. * We also want to use a 32-bit data type for the dst of the load operation * so other parts of the driver don't get confused about the size of the * result. */ brw_reg vec4_result = vgrf(BRW_TYPE_F, 4); brw_reg srcs[PULL_VARYING_CONSTANT_SRCS]; srcs[PULL_VARYING_CONSTANT_SRC_SURFACE] = surface; srcs[PULL_VARYING_CONSTANT_SRC_SURFACE_HANDLE] = surface_handle; srcs[PULL_VARYING_CONSTANT_SRC_OFFSET] = total_offset; srcs[PULL_VARYING_CONSTANT_SRC_ALIGNMENT] = brw_imm_ud(alignment); fs_inst *inst = emit(FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_LOGICAL, vec4_result, srcs, PULL_VARYING_CONSTANT_SRCS); inst->size_written = 4 * vec4_result.component_size(inst->exec_size); shuffle_from_32bit_read(dst, vec4_result, 0, components); } brw_reg LOAD_SUBGROUP_INVOCATION() const { brw_reg reg = vgrf(shader->dispatch_width < 16 ? BRW_TYPE_UD : BRW_TYPE_UW); exec_all().emit(SHADER_OPCODE_LOAD_SUBGROUP_INVOCATION, reg); return reg; } brw_reg BROADCAST(brw_reg value, brw_reg index) const { const brw_builder xbld = scalar_group(); const brw_reg dst = xbld.vgrf(value.type); assert(is_uniform(index)); /* A broadcast will always be at the full dispatch width even if the * use of the broadcast result is smaller. If the source is_scalar, * it may be allocated at less than the full dispatch width (e.g., * allocated at SIMD8 with SIMD32 dispatch). The input may or may * not be stride=0. If it is not, the generated broadcast * * broadcast(32) dst, value<1>, index<0> * * is invalid because it may read out of bounds from value. * * To account for this, modify the stride of an is_scalar input to be * zero. */ if (value.is_scalar) value = component(value, 0); /* Ensure that the source of a broadcast is always register aligned. * See brw_broadcast() non-scalar case for more details. */ if (reg_offset(value) % (REG_SIZE * reg_unit(shader->devinfo)) != 0) value = MOV(value); /* BROADCAST will only write a single component after lowering. Munge * size_written here to match the allocated size of dst. */ exec_all().emit(SHADER_OPCODE_BROADCAST, dst, value, index) ->size_written = dst.component_size(xbld.dispatch_width()); return component(dst, 0); } fs_visitor *shader; fs_inst *BREAK() { return emit(BRW_OPCODE_BREAK); } fs_inst *DO() { return emit(BRW_OPCODE_DO); } fs_inst *ENDIF() { return emit(BRW_OPCODE_ENDIF); } fs_inst *NOP() { return emit(BRW_OPCODE_NOP); } fs_inst *WHILE() { return emit(BRW_OPCODE_WHILE); } fs_inst *CONTINUE() { return emit(BRW_OPCODE_CONTINUE); } bool has_writemask_all() const { return force_writemask_all; } private: /** * Workaround for negation of UD registers. See comment in * brw_generator::generate_code() for more details. */ brw_reg fix_unsigned_negate(const brw_reg &src) const { if (src.type == BRW_TYPE_UD && src.negate) { brw_reg temp = vgrf(BRW_TYPE_UD); MOV(temp, src); return brw_reg(temp); } else { return src; } } /** * Workaround for source register modes not supported by the ternary * instruction encoding. */ brw_reg fix_3src_operand(const brw_reg &src) const { switch (src.file) { case FIXED_GRF: /* FINISHME: Could handle scalar region, other stride=1 regions */ if (src.vstride != BRW_VERTICAL_STRIDE_8 || src.width != BRW_WIDTH_8 || src.hstride != BRW_HORIZONTAL_STRIDE_1) break; FALLTHROUGH; case ATTR: case VGRF: case UNIFORM: case IMM: return src; default: break; } brw_reg expanded = vgrf(src.type); MOV(expanded, src); return expanded; } void shuffle_from_32bit_read(const brw_reg &dst, const brw_reg &src, uint32_t first_component, uint32_t components) const; bblock_t *block; exec_node *cursor; unsigned _dispatch_width; unsigned _group; bool force_writemask_all; /** Debug annotation info. */ struct { const char *str; } annotation; }; /** * Offset by a number of components into a VGRF * * It is assumed that the VGRF represents a vector (e.g., returned by * load_uniform or a texture operation). Convergent and divergent values are * stored differently, so care must be taken to offset properly. */ static inline brw_reg offset(const brw_reg ®, const brw_builder &bld, unsigned delta) { /* If the value is convergent (stored as one or more SIMD8), offset using * SIMD8 and select component 0. */ if (reg.is_scalar) { const unsigned allocation_width = 8 * reg_unit(bld.shader->devinfo); brw_reg offset_reg = offset(reg, allocation_width, delta); /* If the dispatch width is larger than the allocation width, that * implies that the register can only be used as a source. Otherwise the * instruction would write past the allocation size of the register. */ if (bld.dispatch_width() > allocation_width) return component(offset_reg, 0); else return offset_reg; } /* Offset to the component assuming the value was allocated in * dispatch_width units. */ return offset(reg, bld.dispatch_width(), delta); } brw_reg brw_sample_mask_reg(const brw_builder &bld); void brw_emit_predicate_on_sample_mask(const brw_builder &bld, fs_inst *inst); brw_reg brw_fetch_payload_reg(const brw_builder &bld, uint8_t regs[2], brw_reg_type type = BRW_TYPE_F, unsigned n = 1); brw_reg brw_fetch_barycentric_reg(const brw_builder &bld, uint8_t regs[2]); void brw_check_dynamic_msaa_flag(const brw_builder &bld, const struct brw_wm_prog_data *wm_prog_data, enum intel_msaa_flags flag);