/* * Copyright © 2010 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. */ /** @file brw_fs_generator.cpp * * This file supports generating code from the FS LIR to the actual * native instructions. */ #include "brw_eu.h" #include "brw_fs.h" #include "brw_cfg.h" #include "brw_program.h" static enum brw_reg_file brw_file_from_reg(fs_reg *reg) { switch (reg->file) { case ARF: return BRW_ARCHITECTURE_REGISTER_FILE; case FIXED_GRF: case VGRF: return BRW_GENERAL_REGISTER_FILE; case MRF: return BRW_MESSAGE_REGISTER_FILE; case IMM: return BRW_IMMEDIATE_VALUE; case BAD_FILE: case ATTR: case UNIFORM: unreachable("not reached"); } return BRW_ARCHITECTURE_REGISTER_FILE; } static struct brw_reg brw_reg_from_fs_reg(fs_inst *inst, fs_reg *reg, unsigned gen) { struct brw_reg brw_reg; switch (reg->file) { case MRF: assert((reg->nr & ~BRW_MRF_COMPR4) < BRW_MAX_MRF(gen)); /* Fallthrough */ case VGRF: if (reg->stride == 0) { brw_reg = brw_vec1_reg(brw_file_from_reg(reg), reg->nr, 0); } else if (inst->exec_size < 8) { brw_reg = brw_vec8_reg(brw_file_from_reg(reg), reg->nr, 0); brw_reg = stride(brw_reg, inst->exec_size * reg->stride, inst->exec_size, reg->stride); } else { /* From the Haswell PRM: * * VertStride must be used to cross GRF register boundaries. This * rule implies that elements within a 'Width' cannot cross GRF * boundaries. * * So, for registers with width > 8, we have to use a width of 8 * and trust the compression state to sort out the exec size. */ brw_reg = brw_vec8_reg(brw_file_from_reg(reg), reg->nr, 0); brw_reg = stride(brw_reg, 8 * reg->stride, 8, reg->stride); } brw_reg = retype(brw_reg, reg->type); brw_reg = byte_offset(brw_reg, reg->subreg_offset); brw_reg.abs = reg->abs; brw_reg.negate = reg->negate; break; case ARF: case FIXED_GRF: case IMM: brw_reg = reg->as_brw_reg(); break; case BAD_FILE: /* Probably unused. */ brw_reg = brw_null_reg(); break; case ATTR: case UNIFORM: unreachable("not reached"); } return brw_reg; } fs_generator::fs_generator(const struct brw_compiler *compiler, void *log_data, void *mem_ctx, const void *key, struct brw_stage_prog_data *prog_data, unsigned promoted_constants, bool runtime_check_aads_emit, gl_shader_stage stage) : compiler(compiler), log_data(log_data), devinfo(compiler->devinfo), key(key), prog_data(prog_data), promoted_constants(promoted_constants), runtime_check_aads_emit(runtime_check_aads_emit), debug_flag(false), stage(stage), mem_ctx(mem_ctx) { p = rzalloc(mem_ctx, struct brw_codegen); brw_init_codegen(devinfo, p, mem_ctx); } fs_generator::~fs_generator() { } class ip_record : public exec_node { public: DECLARE_RALLOC_CXX_OPERATORS(ip_record) ip_record(int ip) { this->ip = ip; } int ip; }; bool fs_generator::patch_discard_jumps_to_fb_writes() { if (devinfo->gen < 6 || this->discard_halt_patches.is_empty()) return false; int scale = brw_jump_scale(p->devinfo); /* There is a somewhat strange undocumented requirement of using * HALT, according to the simulator. If some channel has HALTed to * a particular UIP, then by the end of the program, every channel * must have HALTed to that UIP. Furthermore, the tracking is a * stack, so you can't do the final halt of a UIP after starting * halting to a new UIP. * * Symptoms of not emitting this instruction on actual hardware * included GPU hangs and sparkly rendering on the piglit discard * tests. */ brw_inst *last_halt = gen6_HALT(p); brw_inst_set_uip(p->devinfo, last_halt, 1 * scale); brw_inst_set_jip(p->devinfo, last_halt, 1 * scale); int ip = p->nr_insn; foreach_in_list(ip_record, patch_ip, &discard_halt_patches) { brw_inst *patch = &p->store[patch_ip->ip]; assert(brw_inst_opcode(p->devinfo, patch) == BRW_OPCODE_HALT); /* HALT takes a half-instruction distance from the pre-incremented IP. */ brw_inst_set_uip(p->devinfo, patch, (ip - patch_ip->ip) * scale); } this->discard_halt_patches.make_empty(); return true; } void fs_generator::fire_fb_write(fs_inst *inst, struct brw_reg payload, struct brw_reg implied_header, GLuint nr) { uint32_t msg_control; brw_wm_prog_data *prog_data = (brw_wm_prog_data*) this->prog_data; if (devinfo->gen < 6) { brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_MOV(p, offset(payload, 1), brw_vec8_grf(1, 0)); brw_pop_insn_state(p); } if (inst->opcode == FS_OPCODE_REP_FB_WRITE) msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE_REPLICATED; else if (prog_data->dual_src_blend) { if (!inst->force_sechalf) msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN01; else msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN23; } else if (inst->exec_size == 16) msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE; else msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01; uint32_t surf_index = prog_data->binding_table.render_target_start + inst->target; bool last_render_target = inst->eot || (prog_data->dual_src_blend && dispatch_width == 16); brw_fb_WRITE(p, dispatch_width, payload, implied_header, msg_control, surf_index, nr, 0, inst->eot, last_render_target, inst->header_size != 0); brw_mark_surface_used(&prog_data->base, surf_index); } void fs_generator::generate_fb_write(fs_inst *inst, struct brw_reg payload) { brw_wm_prog_data *prog_data = (brw_wm_prog_data*) this->prog_data; const brw_wm_prog_key * const key = (brw_wm_prog_key * const) this->key; struct brw_reg implied_header; if (devinfo->gen < 8 && !devinfo->is_haswell) { brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); } if (inst->base_mrf >= 0) payload = brw_message_reg(inst->base_mrf); /* Header is 2 regs, g0 and g1 are the contents. g0 will be implied * move, here's g1. */ if (inst->header_size != 0) { brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_set_default_flag_reg(p, 0, 0); /* On HSW, the GPU will use the predicate on SENDC, unless the header is * present. */ if (prog_data->uses_kill) { struct brw_reg pixel_mask; if (devinfo->gen >= 6) pixel_mask = retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW); else pixel_mask = retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UW); brw_MOV(p, pixel_mask, brw_flag_reg(0, 1)); } if (devinfo->gen >= 6) { brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_16); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); brw_MOV(p, retype(payload, BRW_REGISTER_TYPE_UD), retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); brw_pop_insn_state(p); if (inst->target > 0 && key->replicate_alpha) { /* Set "Source0 Alpha Present to RenderTarget" bit in message * header. */ brw_OR(p, vec1(retype(payload, BRW_REGISTER_TYPE_UD)), vec1(retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)), brw_imm_ud(0x1 << 11)); } if (inst->target > 0) { /* Set the render target index for choosing BLEND_STATE. */ brw_MOV(p, retype(vec1(suboffset(payload, 2)), BRW_REGISTER_TYPE_UD), brw_imm_ud(inst->target)); } /* Set computes stencil to render target */ if (prog_data->computed_stencil) { brw_OR(p, vec1(retype(payload, BRW_REGISTER_TYPE_UD)), vec1(retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)), brw_imm_ud(0x1 << 14)); } implied_header = brw_null_reg(); } else { implied_header = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); } brw_pop_insn_state(p); } else { implied_header = brw_null_reg(); } if (!runtime_check_aads_emit) { fire_fb_write(inst, payload, implied_header, inst->mlen); } else { /* This can only happen in gen < 6 */ assert(devinfo->gen < 6); struct brw_reg v1_null_ud = vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD)); /* Check runtime bit to detect if we have to send AA data or not */ brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_AND(p, v1_null_ud, retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_UD), brw_imm_ud(1<<26)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ); int jmp = brw_JMPI(p, brw_imm_ud(0), BRW_PREDICATE_NORMAL) - p->store; brw_inst_set_exec_size(p->devinfo, brw_last_inst, BRW_EXECUTE_1); { /* Don't send AA data */ fire_fb_write(inst, offset(payload, 1), implied_header, inst->mlen-1); } brw_land_fwd_jump(p, jmp); fire_fb_write(inst, payload, implied_header, inst->mlen); } } void fs_generator::generate_mov_indirect(fs_inst *inst, struct brw_reg dst, struct brw_reg reg, struct brw_reg indirect_byte_offset) { assert(indirect_byte_offset.type == BRW_REGISTER_TYPE_UD); assert(indirect_byte_offset.file == BRW_GENERAL_REGISTER_FILE); unsigned imm_byte_offset = reg.nr * REG_SIZE + reg.subnr; if (indirect_byte_offset.file == BRW_IMMEDIATE_VALUE) { imm_byte_offset += indirect_byte_offset.ud; reg.nr = imm_byte_offset / REG_SIZE; reg.subnr = imm_byte_offset % REG_SIZE; brw_MOV(p, dst, reg); } else { /* Prior to Broadwell, there are only 8 address registers. */ assert(inst->exec_size == 8 || devinfo->gen >= 8); /* We use VxH indirect addressing, clobbering a0.0 through a0.7. */ struct brw_reg addr = vec8(brw_address_reg(0)); /* The destination stride of an instruction (in bytes) must be greater * than or equal to the size of the rest of the instruction. Since the * address register is of type UW, we can't use a D-type instruction. * In order to get around this, re retype to UW and use a stride. */ indirect_byte_offset = retype(spread(indirect_byte_offset, 2), BRW_REGISTER_TYPE_UW); struct brw_reg ind_src; if (devinfo->gen < 8) { /* From the Haswell PRM section "Register Region Restrictions": * * "The lower bits of the AddressImmediate must not overflow to * change the register address. The lower 5 bits of Address * Immediate when added to lower 5 bits of address register gives * the sub-register offset. The upper bits of Address Immediate * when added to upper bits of address register gives the register * address. Any overflow from sub-register offset is dropped." * * This restriction is only listed in the Haswell PRM but emperical * testing indicates that it applies on all older generations and is * lifted on Broadwell. * * Since the indirect may cause us to cross a register boundary, this * makes the base offset almost useless. We could try and do * something clever where we use a actual base offset if * base_offset % 32 == 0 but that would mean we were generating * different code depending on the base offset. Instead, for the * sake of consistency, we'll just do the add ourselves. */ brw_ADD(p, addr, indirect_byte_offset, brw_imm_uw(imm_byte_offset)); ind_src = brw_VxH_indirect(0, 0); } else { brw_MOV(p, addr, indirect_byte_offset); ind_src = brw_VxH_indirect(0, imm_byte_offset); } brw_inst *mov = brw_MOV(p, dst, retype(ind_src, dst.type)); if (devinfo->gen == 6 && dst.file == BRW_MESSAGE_REGISTER_FILE && !inst->get_next()->is_tail_sentinel() && ((fs_inst *)inst->get_next())->mlen > 0) { /* From the Sandybridge PRM: * * "[Errata: DevSNB(SNB)] If MRF register is updated by any * instruction that “indexed/indirect” source AND is followed by a * send, the instruction requires a “Switch”. This is to avoid * race condition where send may dispatch before MRF is updated." */ brw_inst_set_thread_control(devinfo, mov, BRW_THREAD_SWITCH); } } } void fs_generator::generate_urb_read(fs_inst *inst, struct brw_reg dst, struct brw_reg header) { assert(header.file == BRW_GENERAL_REGISTER_FILE); assert(header.type == BRW_REGISTER_TYPE_UD); brw_inst *send = brw_next_insn(p, BRW_OPCODE_SEND); brw_set_dest(p, send, dst); brw_set_src0(p, send, header); brw_set_src1(p, send, brw_imm_ud(0u)); brw_inst_set_sfid(p->devinfo, send, BRW_SFID_URB); brw_inst_set_urb_opcode(p->devinfo, send, GEN8_URB_OPCODE_SIMD8_READ); if (inst->opcode == SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT) brw_inst_set_urb_per_slot_offset(p->devinfo, send, true); brw_inst_set_mlen(p->devinfo, send, inst->mlen); brw_inst_set_rlen(p->devinfo, send, inst->regs_written); brw_inst_set_header_present(p->devinfo, send, true); brw_inst_set_urb_global_offset(p->devinfo, send, inst->offset); } void fs_generator::generate_urb_write(fs_inst *inst, struct brw_reg payload) { brw_inst *insn; insn = brw_next_insn(p, BRW_OPCODE_SEND); brw_set_dest(p, insn, brw_null_reg()); brw_set_src0(p, insn, payload); brw_set_src1(p, insn, brw_imm_d(0)); brw_inst_set_sfid(p->devinfo, insn, BRW_SFID_URB); brw_inst_set_urb_opcode(p->devinfo, insn, GEN8_URB_OPCODE_SIMD8_WRITE); if (inst->opcode == SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT || inst->opcode == SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT) brw_inst_set_urb_per_slot_offset(p->devinfo, insn, true); if (inst->opcode == SHADER_OPCODE_URB_WRITE_SIMD8_MASKED || inst->opcode == SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT) brw_inst_set_urb_channel_mask_present(p->devinfo, insn, true); brw_inst_set_mlen(p->devinfo, insn, inst->mlen); brw_inst_set_rlen(p->devinfo, insn, 0); brw_inst_set_eot(p->devinfo, insn, inst->eot); brw_inst_set_header_present(p->devinfo, insn, true); brw_inst_set_urb_global_offset(p->devinfo, insn, inst->offset); } void fs_generator::generate_cs_terminate(fs_inst *inst, struct brw_reg payload) { struct brw_inst *insn; insn = brw_next_insn(p, BRW_OPCODE_SEND); brw_set_dest(p, insn, retype(brw_null_reg(), BRW_REGISTER_TYPE_UW)); brw_set_src0(p, insn, payload); brw_set_src1(p, insn, brw_imm_d(0)); /* Terminate a compute shader by sending a message to the thread spawner. */ brw_inst_set_sfid(devinfo, insn, BRW_SFID_THREAD_SPAWNER); brw_inst_set_mlen(devinfo, insn, 1); brw_inst_set_rlen(devinfo, insn, 0); brw_inst_set_eot(devinfo, insn, inst->eot); brw_inst_set_header_present(devinfo, insn, false); brw_inst_set_ts_opcode(devinfo, insn, 0); /* Dereference resource */ brw_inst_set_ts_request_type(devinfo, insn, 0); /* Root thread */ /* Note that even though the thread has a URB resource associated with it, * we set the "do not dereference URB" bit, because the URB resource is * managed by the fixed-function unit, so it will free it automatically. */ brw_inst_set_ts_resource_select(devinfo, insn, 1); /* Do not dereference URB */ brw_inst_set_mask_control(devinfo, insn, BRW_MASK_DISABLE); } void fs_generator::generate_stencil_ref_packing(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { assert(dispatch_width == 8); assert(devinfo->gen >= 9); /* Stencil value updates are provided in 8 slots of 1 byte per slot. * Presumably, in order to save memory bandwidth, the stencil reference * values written from the FS need to be packed into 2 dwords (this makes * sense because the stencil values are limited to 1 byte each and a SIMD8 * send, so stencil slots 0-3 in dw0, and 4-7 in dw1.) * * The spec is confusing here because in the payload definition of MDP_RTW_S8 * (Message Data Payload for Render Target Writes with Stencil 8b) the * stencil value seems to be dw4.0-dw4.7. However, if you look at the type of * dw4 it is type MDPR_STENCIL (Message Data Payload Register) which is the * packed values specified above and diagrammed below: * * 31 0 * -------------------------------- * DW | | * 2-7 | IGNORED | * | | * -------------------------------- * DW1 | STC | STC | STC | STC | * | slot7 | slot6 | slot5 | slot4| * -------------------------------- * DW0 | STC | STC | STC | STC | * | slot3 | slot2 | slot1 | slot0| * -------------------------------- */ src.vstride = BRW_VERTICAL_STRIDE_4; src.width = BRW_WIDTH_1; src.hstride = BRW_HORIZONTAL_STRIDE_0; assert(src.type == BRW_REGISTER_TYPE_UB); brw_MOV(p, retype(dst, BRW_REGISTER_TYPE_UB), src); } void fs_generator::generate_barrier(fs_inst *inst, struct brw_reg src) { brw_barrier(p, src); brw_WAIT(p); } void fs_generator::generate_blorp_fb_write(fs_inst *inst) { brw_fb_WRITE(p, 16 /* dispatch_width */, brw_message_reg(inst->base_mrf), brw_reg_from_fs_reg(inst, &inst->src[0], devinfo->gen), BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE, inst->target, inst->mlen, 0, true, true, inst->header_size != 0); } void fs_generator::generate_linterp(fs_inst *inst, struct brw_reg dst, struct brw_reg *src) { /* PLN reads: * / in SIMD16 \ * ----------------------------------- * | src1+0 | src1+1 | src1+2 | src1+3 | * |-----------------------------------| * |(x0, x1)|(y0, y1)|(x2, x3)|(y2, y3)| * ----------------------------------- * * but for the LINE/MAC pair, the LINE reads Xs and the MAC reads Ys: * * ----------------------------------- * | src1+0 | src1+1 | src1+2 | src1+3 | * |-----------------------------------| * |(x0, x1)|(y0, y1)| | | in SIMD8 * |-----------------------------------| * |(x0, x1)|(x2, x3)|(y0, y1)|(y2, y3)| in SIMD16 * ----------------------------------- * * See also: emit_interpolation_setup_gen4(). */ struct brw_reg delta_x = src[0]; struct brw_reg delta_y = offset(src[0], dispatch_width / 8); struct brw_reg interp = src[1]; if (devinfo->has_pln && (devinfo->gen >= 7 || (delta_x.nr & 1) == 0)) { brw_PLN(p, dst, interp, delta_x); } else { brw_LINE(p, brw_null_reg(), interp, delta_x); brw_MAC(p, dst, suboffset(interp, 1), delta_y); } } void fs_generator::generate_math_gen6(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1) { int op = brw_math_function(inst->opcode); bool binop = src1.file != BRW_ARCHITECTURE_REGISTER_FILE; if (dispatch_width == 8) { gen6_math(p, dst, op, src0, src1); } else if (dispatch_width == 16) { brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); gen6_math(p, firsthalf(dst), op, firsthalf(src0), firsthalf(src1)); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); gen6_math(p, sechalf(dst), op, sechalf(src0), binop ? sechalf(src1) : brw_null_reg()); brw_pop_insn_state(p); } } void fs_generator::generate_math_gen4(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { int op = brw_math_function(inst->opcode); assert(inst->mlen >= 1); if (dispatch_width == 8) { gen4_math(p, dst, op, inst->base_mrf, src, BRW_MATH_PRECISION_FULL); } else if (dispatch_width == 16) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); gen4_math(p, firsthalf(dst), op, inst->base_mrf, firsthalf(src), BRW_MATH_PRECISION_FULL); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); gen4_math(p, sechalf(dst), op, inst->base_mrf + 1, sechalf(src), BRW_MATH_PRECISION_FULL); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); } } void fs_generator::generate_math_g45(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { if (inst->opcode == SHADER_OPCODE_POW || inst->opcode == SHADER_OPCODE_INT_QUOTIENT || inst->opcode == SHADER_OPCODE_INT_REMAINDER) { generate_math_gen4(inst, dst, src); return; } int op = brw_math_function(inst->opcode); assert(inst->mlen >= 1); gen4_math(p, dst, op, inst->base_mrf, src, BRW_MATH_PRECISION_FULL); } void fs_generator::generate_get_buffer_size(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg surf_index) { assert(devinfo->gen >= 7); assert(surf_index.file == BRW_IMMEDIATE_VALUE); uint32_t simd_mode; int rlen = 4; switch (inst->exec_size) { case 8: simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; break; case 16: simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; break; default: unreachable("Invalid width for texture instruction"); } if (simd_mode == BRW_SAMPLER_SIMD_MODE_SIMD16) { rlen = 8; dst = vec16(dst); } brw_SAMPLE(p, retype(dst, BRW_REGISTER_TYPE_UW), inst->base_mrf, src, surf_index.ud, 0, GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO, rlen, /* response length */ inst->mlen, inst->header_size > 0, simd_mode, BRW_SAMPLER_RETURN_FORMAT_SINT32); brw_mark_surface_used(prog_data, surf_index.ud); } void fs_generator::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg surface_index, struct brw_reg sampler_index) { int msg_type = -1; int rlen = 4; uint32_t simd_mode; uint32_t return_format; bool is_combined_send = inst->eot; switch (dst.type) { case BRW_REGISTER_TYPE_D: return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32; break; case BRW_REGISTER_TYPE_UD: return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32; break; default: return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32; break; } /* Stomp the resinfo output type to UINT32. On gens 4-5, the output type * is set as part of the message descriptor. On gen4, the PRM seems to * allow UINT32 and FLOAT32 (i965 PRM, Vol. 4 Section 4.8.1.1), but on * later gens UINT32 is required. Once you hit Sandy Bridge, the bit is * gone from the message descriptor entirely and you just get UINT32 all * the time regasrdless. Since we can really only do non-UINT32 on gen4, * just stomp it to UINT32 all the time. */ if (inst->opcode == SHADER_OPCODE_TXS) return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32; switch (inst->exec_size) { case 8: simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; break; case 16: simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; break; default: unreachable("Invalid width for texture instruction"); } if (devinfo->gen >= 5) { switch (inst->opcode) { case SHADER_OPCODE_TEX: if (inst->shadow_compare) { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE; } break; case FS_OPCODE_TXB: if (inst->shadow_compare) { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS; } break; case SHADER_OPCODE_TXL: if (inst->shadow_compare) { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD; } break; case SHADER_OPCODE_TXS: msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO; break; case SHADER_OPCODE_TXD: if (inst->shadow_compare) { /* Gen7.5+. Otherwise, lowered by brw_lower_texture_gradients(). */ assert(devinfo->gen >= 8 || devinfo->is_haswell); msg_type = HSW_SAMPLER_MESSAGE_SAMPLE_DERIV_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS; } break; case SHADER_OPCODE_TXF: msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD; break; case SHADER_OPCODE_TXF_CMS_W: assert(devinfo->gen >= 9); msg_type = GEN9_SAMPLER_MESSAGE_SAMPLE_LD2DMS_W; break; case SHADER_OPCODE_TXF_CMS: if (devinfo->gen >= 7) msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DMS; else msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD; break; case SHADER_OPCODE_TXF_UMS: assert(devinfo->gen >= 7); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DSS; break; case SHADER_OPCODE_TXF_MCS: assert(devinfo->gen >= 7); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD_MCS; break; case SHADER_OPCODE_LOD: msg_type = GEN5_SAMPLER_MESSAGE_LOD; break; case SHADER_OPCODE_TG4: if (inst->shadow_compare) { assert(devinfo->gen >= 7); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_C; } else { assert(devinfo->gen >= 6); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4; } break; case SHADER_OPCODE_TG4_OFFSET: assert(devinfo->gen >= 7); if (inst->shadow_compare) { msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO_C; } else { msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO; } break; case SHADER_OPCODE_SAMPLEINFO: msg_type = GEN6_SAMPLER_MESSAGE_SAMPLE_SAMPLEINFO; break; default: unreachable("not reached"); } } else { switch (inst->opcode) { case SHADER_OPCODE_TEX: /* Note that G45 and older determines shadow compare and dispatch width * from message length for most messages. */ if (inst->exec_size == 8) { msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE; if (inst->shadow_compare) { assert(inst->mlen == 6); } else { assert(inst->mlen <= 4); } } else { if (inst->shadow_compare) { msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_COMPARE; assert(inst->mlen == 9); } else { msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE; assert(inst->mlen <= 7 && inst->mlen % 2 == 1); } } break; case FS_OPCODE_TXB: if (inst->shadow_compare) { assert(inst->exec_size == 8); assert(inst->mlen == 6); msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_BIAS_COMPARE; } else { assert(inst->mlen == 9); msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; } break; case SHADER_OPCODE_TXL: if (inst->shadow_compare) { assert(inst->exec_size == 8); assert(inst->mlen == 6); msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_LOD_COMPARE; } else { assert(inst->mlen == 9); msg_type = BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_LOD; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; } break; case SHADER_OPCODE_TXD: /* There is no sample_d_c message; comparisons are done manually */ assert(inst->exec_size == 8); assert(inst->mlen == 7 || inst->mlen == 10); msg_type = BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE_GRADIENTS; break; case SHADER_OPCODE_TXF: assert(inst->mlen <= 9 && inst->mlen % 2 == 1); msg_type = BRW_SAMPLER_MESSAGE_SIMD16_LD; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; break; case SHADER_OPCODE_TXS: assert(inst->mlen == 3); msg_type = BRW_SAMPLER_MESSAGE_SIMD16_RESINFO; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; break; default: unreachable("not reached"); } } assert(msg_type != -1); if (simd_mode == BRW_SAMPLER_SIMD_MODE_SIMD16) { rlen = 8; dst = vec16(dst); } if (is_combined_send) { assert(devinfo->gen >= 9 || devinfo->is_cherryview); rlen = 0; } assert(devinfo->gen < 7 || inst->header_size == 0 || src.file == BRW_GENERAL_REGISTER_FILE); assert(sampler_index.type == BRW_REGISTER_TYPE_UD); /* Load the message header if present. If there's a texture offset, * we need to set it up explicitly and load the offset bitfield. * Otherwise, we can use an implied move from g0 to the first message reg. */ if (inst->header_size != 0) { if (devinfo->gen < 6 && !inst->offset) { /* Set up an implied move from g0 to the MRF. */ src = retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW); } else { struct brw_reg header_reg; if (devinfo->gen >= 7) { header_reg = src; } else { assert(inst->base_mrf != -1); header_reg = brw_message_reg(inst->base_mrf); } brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); /* Explicitly set up the message header by copying g0 to the MRF. */ brw_MOV(p, header_reg, brw_vec8_grf(0, 0)); if (inst->offset) { /* Set the offset bits in DWord 2. */ brw_MOV(p, get_element_ud(header_reg, 2), brw_imm_ud(inst->offset)); } else if (stage != MESA_SHADER_VERTEX && stage != MESA_SHADER_FRAGMENT) { /* The vertex and fragment stages have g0.2 set to 0, so * header0.2 is 0 when g0 is copied. Other stages may not, so we * must set it to 0 to avoid setting undesirable bits in the * message. */ brw_MOV(p, get_element_ud(header_reg, 2), brw_imm_ud(0)); } brw_adjust_sampler_state_pointer(p, header_reg, sampler_index); brw_pop_insn_state(p); } } uint32_t base_binding_table_index = (inst->opcode == SHADER_OPCODE_TG4 || inst->opcode == SHADER_OPCODE_TG4_OFFSET) ? prog_data->binding_table.gather_texture_start : prog_data->binding_table.texture_start; if (surface_index.file == BRW_IMMEDIATE_VALUE && sampler_index.file == BRW_IMMEDIATE_VALUE) { uint32_t surface = surface_index.ud; uint32_t sampler = sampler_index.ud; brw_SAMPLE(p, retype(dst, BRW_REGISTER_TYPE_UW), inst->base_mrf, src, surface + base_binding_table_index, sampler % 16, msg_type, rlen, inst->mlen, inst->header_size != 0, simd_mode, return_format); brw_mark_surface_used(prog_data, surface + base_binding_table_index); } else { /* Non-const sampler index */ struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD)); struct brw_reg surface_reg = vec1(retype(surface_index, BRW_REGISTER_TYPE_UD)); struct brw_reg sampler_reg = vec1(retype(sampler_index, BRW_REGISTER_TYPE_UD)); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_access_mode(p, BRW_ALIGN_1); if (memcmp(&surface_reg, &sampler_reg, sizeof(surface_reg)) == 0) { brw_MUL(p, addr, sampler_reg, brw_imm_uw(0x101)); } else { brw_SHL(p, addr, sampler_reg, brw_imm_ud(8)); brw_OR(p, addr, addr, surface_reg); } if (base_binding_table_index) brw_ADD(p, addr, addr, brw_imm_ud(base_binding_table_index)); brw_AND(p, addr, addr, brw_imm_ud(0xfff)); brw_pop_insn_state(p); /* dst = send(offset, a0.0 | ) */ brw_inst *insn = brw_send_indirect_message( p, BRW_SFID_SAMPLER, dst, src, addr); brw_set_sampler_message(p, insn, 0 /* surface */, 0 /* sampler */, msg_type, rlen, inst->mlen /* mlen */, inst->header_size != 0 /* header */, simd_mode, return_format); /* visitor knows more than we do about the surface limit required, * so has already done marking. */ } if (is_combined_send) { brw_inst_set_eot(p->devinfo, brw_last_inst, true); brw_inst_set_opcode(p->devinfo, brw_last_inst, BRW_OPCODE_SENDC); } } /* For OPCODE_DDX and OPCODE_DDY, per channel of output we've got input * looking like: * * arg0: ss0.tl ss0.tr ss0.bl ss0.br ss1.tl ss1.tr ss1.bl ss1.br * * Ideally, we want to produce: * * DDX DDY * dst: (ss0.tr - ss0.tl) (ss0.tl - ss0.bl) * (ss0.tr - ss0.tl) (ss0.tr - ss0.br) * (ss0.br - ss0.bl) (ss0.tl - ss0.bl) * (ss0.br - ss0.bl) (ss0.tr - ss0.br) * (ss1.tr - ss1.tl) (ss1.tl - ss1.bl) * (ss1.tr - ss1.tl) (ss1.tr - ss1.br) * (ss1.br - ss1.bl) (ss1.tl - ss1.bl) * (ss1.br - ss1.bl) (ss1.tr - ss1.br) * * and add another set of two more subspans if in 16-pixel dispatch mode. * * For DDX, it ends up being easy: width = 2, horiz=0 gets us the same result * for each pair, and vertstride = 2 jumps us 2 elements after processing a * pair. But the ideal approximation may impose a huge performance cost on * sample_d. On at least Haswell, sample_d instruction does some * optimizations if the same LOD is used for all pixels in the subspan. * * For DDY, we need to use ALIGN16 mode since it's capable of doing the * appropriate swizzling. */ void fs_generator::generate_ddx(enum opcode opcode, struct brw_reg dst, struct brw_reg src) { unsigned vstride, width; if (opcode == FS_OPCODE_DDX_FINE) { /* produce accurate derivatives */ vstride = BRW_VERTICAL_STRIDE_2; width = BRW_WIDTH_2; } else { /* replicate the derivative at the top-left pixel to other pixels */ vstride = BRW_VERTICAL_STRIDE_4; width = BRW_WIDTH_4; } struct brw_reg src0 = brw_reg(src.file, src.nr, 1, src.negate, src.abs, BRW_REGISTER_TYPE_F, vstride, width, BRW_HORIZONTAL_STRIDE_0, BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); struct brw_reg src1 = brw_reg(src.file, src.nr, 0, src.negate, src.abs, BRW_REGISTER_TYPE_F, vstride, width, BRW_HORIZONTAL_STRIDE_0, BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); brw_ADD(p, dst, src0, negate(src1)); } /* The negate_value boolean is used to negate the derivative computation for * FBOs, since they place the origin at the upper left instead of the lower * left. */ void fs_generator::generate_ddy(enum opcode opcode, struct brw_reg dst, struct brw_reg src, bool negate_value) { if (opcode == FS_OPCODE_DDY_FINE) { /* From the Ivy Bridge PRM, volume 4 part 3, section 3.3.9 (Register * Region Restrictions): * * In Align16 access mode, SIMD16 is not allowed for DW operations * and SIMD8 is not allowed for DF operations. * * In this context, "DW operations" means "operations acting on 32-bit * values", so it includes operations on floats. * * Gen4 has a similar restriction. From the i965 PRM, section 11.5.3 * (Instruction Compression -> Rules and Restrictions): * * A compressed instruction must be in Align1 access mode. Align16 * mode instructions cannot be compressed. * * Similar text exists in the g45 PRM. * * On these platforms, if we're building a SIMD16 shader, we need to * manually unroll to a pair of SIMD8 instructions. */ bool unroll_to_simd8 = (dispatch_width == 16 && (devinfo->gen == 4 || (devinfo->gen == 7 && !devinfo->is_haswell))); /* produce accurate derivatives */ struct brw_reg src0 = brw_reg(src.file, src.nr, 0, src.negate, src.abs, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, BRW_HORIZONTAL_STRIDE_1, BRW_SWIZZLE_XYXY, WRITEMASK_XYZW); struct brw_reg src1 = brw_reg(src.file, src.nr, 0, src.negate, src.abs, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, BRW_HORIZONTAL_STRIDE_1, BRW_SWIZZLE_ZWZW, WRITEMASK_XYZW); brw_push_insn_state(p); brw_set_default_access_mode(p, BRW_ALIGN_16); if (unroll_to_simd8) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); if (negate_value) { brw_ADD(p, firsthalf(dst), firsthalf(src1), negate(firsthalf(src0))); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_ADD(p, sechalf(dst), sechalf(src1), negate(sechalf(src0))); } else { brw_ADD(p, firsthalf(dst), firsthalf(src0), negate(firsthalf(src1))); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_ADD(p, sechalf(dst), sechalf(src0), negate(sechalf(src1))); } } else { if (negate_value) brw_ADD(p, dst, src1, negate(src0)); else brw_ADD(p, dst, src0, negate(src1)); } brw_pop_insn_state(p); } else { /* replicate the derivative at the top-left pixel to other pixels */ struct brw_reg src0 = brw_reg(src.file, src.nr, 0, src.negate, src.abs, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, BRW_HORIZONTAL_STRIDE_0, BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); struct brw_reg src1 = brw_reg(src.file, src.nr, 2, src.negate, src.abs, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, BRW_HORIZONTAL_STRIDE_0, BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); if (negate_value) brw_ADD(p, dst, src1, negate(src0)); else brw_ADD(p, dst, src0, negate(src1)); } } void fs_generator::generate_discard_jump(fs_inst *inst) { assert(devinfo->gen >= 6); /* This HALT will be patched up at FB write time to point UIP at the end of * the program, and at brw_uip_jip() JIP will be set to the end of the * current block (or the program). */ this->discard_halt_patches.push_tail(new(mem_ctx) ip_record(p->nr_insn)); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); gen6_HALT(p); brw_pop_insn_state(p); } void fs_generator::generate_scratch_write(fs_inst *inst, struct brw_reg src) { assert(inst->mlen != 0); brw_MOV(p, brw_uvec_mrf(inst->exec_size, (inst->base_mrf + 1), 0), retype(src, BRW_REGISTER_TYPE_UD)); brw_oword_block_write_scratch(p, brw_message_reg(inst->base_mrf), inst->exec_size / 8, inst->offset); } void fs_generator::generate_scratch_read(fs_inst *inst, struct brw_reg dst) { assert(inst->mlen != 0); brw_oword_block_read_scratch(p, dst, brw_message_reg(inst->base_mrf), inst->exec_size / 8, inst->offset); } void fs_generator::generate_scratch_read_gen7(fs_inst *inst, struct brw_reg dst) { gen7_block_read_scratch(p, dst, inst->exec_size / 8, inst->offset); } void fs_generator::generate_uniform_pull_constant_load(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset) { assert(inst->mlen != 0); assert(index.file == BRW_IMMEDIATE_VALUE && index.type == BRW_REGISTER_TYPE_UD); uint32_t surf_index = index.ud; assert(offset.file == BRW_IMMEDIATE_VALUE && offset.type == BRW_REGISTER_TYPE_UD); uint32_t read_offset = offset.ud; brw_oword_block_read(p, dst, brw_message_reg(inst->base_mrf), read_offset, surf_index); } void fs_generator::generate_uniform_pull_constant_load_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset) { assert(index.type == BRW_REGISTER_TYPE_UD); assert(offset.file == BRW_GENERAL_REGISTER_FILE); /* Reference just the dword we need, to avoid angering validate_reg(). */ offset = brw_vec1_grf(offset.nr, 0); /* We use the SIMD4x2 mode because we want to end up with 4 components in * the destination loaded consecutively from the same offset (which appears * in the first component, and the rest are ignored). */ dst.width = BRW_WIDTH_4; struct brw_reg src = offset; bool header_present = false; if (devinfo->gen >= 9) { /* Skylake requires a message header in order to use SIMD4x2 mode. */ src = retype(brw_vec4_grf(offset.nr, 0), BRW_REGISTER_TYPE_UD); header_present = true; brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_MOV(p, vec8(src), retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); brw_set_default_access_mode(p, BRW_ALIGN_1); brw_MOV(p, get_element_ud(src, 2), brw_imm_ud(GEN9_SAMPLER_SIMD_MODE_EXTENSION_SIMD4X2)); brw_pop_insn_state(p); } if (index.file == BRW_IMMEDIATE_VALUE) { uint32_t surf_index = index.ud; brw_push_insn_state(p); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_inst *send = brw_next_insn(p, BRW_OPCODE_SEND); brw_inst_set_exec_size(devinfo, send, BRW_EXECUTE_4); brw_pop_insn_state(p); brw_set_dest(p, send, dst); brw_set_src0(p, send, src); brw_set_sampler_message(p, send, surf_index, 0, /* LD message ignores sampler unit */ GEN5_SAMPLER_MESSAGE_SAMPLE_LD, 1, /* rlen */ inst->mlen, header_present, BRW_SAMPLER_SIMD_MODE_SIMD4X2, 0); } else { struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD)); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_access_mode(p, BRW_ALIGN_1); /* a0.0 = surf_index & 0xff */ brw_inst *insn_and = brw_next_insn(p, BRW_OPCODE_AND); brw_inst_set_exec_size(p->devinfo, insn_and, BRW_EXECUTE_1); brw_set_dest(p, insn_and, addr); brw_set_src0(p, insn_and, vec1(retype(index, BRW_REGISTER_TYPE_UD))); brw_set_src1(p, insn_and, brw_imm_ud(0x0ff)); /* dst = send(payload, a0.0 | ) */ brw_inst *insn = brw_send_indirect_message( p, BRW_SFID_SAMPLER, dst, src, addr); brw_set_sampler_message(p, insn, 0, 0, /* LD message ignores sampler unit */ GEN5_SAMPLER_MESSAGE_SAMPLE_LD, 1, /* rlen */ inst->mlen, header_present, BRW_SAMPLER_SIMD_MODE_SIMD4X2, 0); brw_pop_insn_state(p); } } void fs_generator::generate_varying_pull_constant_load(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset) { assert(devinfo->gen < 7); /* Should use the gen7 variant. */ assert(inst->header_size != 0); assert(inst->mlen); assert(index.file == BRW_IMMEDIATE_VALUE && index.type == BRW_REGISTER_TYPE_UD); uint32_t surf_index = index.ud; uint32_t simd_mode, rlen, msg_type; if (dispatch_width == 16) { simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; rlen = 8; } else { simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; rlen = 4; } if (devinfo->gen >= 5) msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD; else { /* We always use the SIMD16 message so that we only have to load U, and * not V or R. */ msg_type = BRW_SAMPLER_MESSAGE_SIMD16_LD; assert(inst->mlen == 3); assert(inst->regs_written == 8); rlen = 8; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; } struct brw_reg offset_mrf = retype(brw_message_reg(inst->base_mrf + 1), BRW_REGISTER_TYPE_D); brw_MOV(p, offset_mrf, offset); struct brw_reg header = brw_vec8_grf(0, 0); gen6_resolve_implied_move(p, &header, inst->base_mrf); brw_inst *send = brw_next_insn(p, BRW_OPCODE_SEND); brw_inst_set_qtr_control(p->devinfo, send, BRW_COMPRESSION_NONE); brw_set_dest(p, send, retype(dst, BRW_REGISTER_TYPE_UW)); brw_set_src0(p, send, header); if (devinfo->gen < 6) brw_inst_set_base_mrf(p->devinfo, send, inst->base_mrf); /* Our surface is set up as floats, regardless of what actual data is * stored in it. */ uint32_t return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32; brw_set_sampler_message(p, send, surf_index, 0, /* sampler (unused) */ msg_type, rlen, inst->mlen, inst->header_size != 0, simd_mode, return_format); } void fs_generator::generate_varying_pull_constant_load_gen7(fs_inst *inst, struct brw_reg dst, struct brw_reg index, struct brw_reg offset) { assert(devinfo->gen >= 7); /* Varying-offset pull constant loads are treated as a normal expression on * gen7, so the fact that it's a send message is hidden at the IR level. */ assert(inst->header_size == 0); assert(!inst->mlen); assert(index.type == BRW_REGISTER_TYPE_UD); uint32_t simd_mode, rlen, mlen; if (dispatch_width == 16) { mlen = 2; rlen = 8; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; } else { mlen = 1; rlen = 4; simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; } if (index.file == BRW_IMMEDIATE_VALUE) { uint32_t surf_index = index.ud; brw_inst *send = brw_next_insn(p, BRW_OPCODE_SEND); brw_set_dest(p, send, retype(dst, BRW_REGISTER_TYPE_UW)); brw_set_src0(p, send, offset); brw_set_sampler_message(p, send, surf_index, 0, /* LD message ignores sampler unit */ GEN5_SAMPLER_MESSAGE_SAMPLE_LD, rlen, mlen, false, /* no header */ simd_mode, 0); } else { struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD)); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_access_mode(p, BRW_ALIGN_1); /* a0.0 = surf_index & 0xff */ brw_inst *insn_and = brw_next_insn(p, BRW_OPCODE_AND); brw_inst_set_exec_size(p->devinfo, insn_and, BRW_EXECUTE_1); brw_set_dest(p, insn_and, addr); brw_set_src0(p, insn_and, vec1(retype(index, BRW_REGISTER_TYPE_UD))); brw_set_src1(p, insn_and, brw_imm_ud(0x0ff)); brw_pop_insn_state(p); /* dst = send(offset, a0.0 | ) */ brw_inst *insn = brw_send_indirect_message( p, BRW_SFID_SAMPLER, retype(dst, BRW_REGISTER_TYPE_UW), offset, addr); brw_set_sampler_message(p, insn, 0 /* surface */, 0 /* sampler */, GEN5_SAMPLER_MESSAGE_SAMPLE_LD, rlen /* rlen */, mlen /* mlen */, false /* header */, simd_mode, 0); } } /** * Cause the current pixel/sample mask (from R1.7 bits 15:0) to be transferred * into the flags register (f0.0). * * Used only on Gen6 and above. */ void fs_generator::generate_mov_dispatch_to_flags(fs_inst *inst) { struct brw_reg flags = brw_flag_reg(0, inst->flag_subreg); struct brw_reg dispatch_mask; if (devinfo->gen >= 6) dispatch_mask = retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW); else dispatch_mask = retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UW); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_MOV(p, flags, dispatch_mask); brw_pop_insn_state(p); } void fs_generator::generate_pixel_interpolator_query(fs_inst *inst, struct brw_reg dst, struct brw_reg src, struct brw_reg msg_data, unsigned msg_type) { assert(msg_data.type == BRW_REGISTER_TYPE_UD); brw_pixel_interpolator_query(p, retype(dst, BRW_REGISTER_TYPE_UW), src, inst->pi_noperspective, msg_type, msg_data, inst->mlen, inst->regs_written); } /** * Sets the first word of a vgrf for gen7+ simd4x2 uniform pull constant * sampler LD messages. * * We don't want to bake it into the send message's code generation because * that means we don't get a chance to schedule the instructions. */ void fs_generator::generate_set_simd4x2_offset(fs_inst *inst, struct brw_reg dst, struct brw_reg value) { assert(value.file == BRW_IMMEDIATE_VALUE); brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_MOV(p, retype(brw_vec1_reg(dst.file, dst.nr, 0), value.type), value); brw_pop_insn_state(p); } /* Sets vstride=1, width=4, hstride=0 of register src1 during * the ADD instruction. */ void fs_generator::generate_set_sample_id(fs_inst *inst, struct brw_reg dst, struct brw_reg src0, struct brw_reg src1) { assert(dst.type == BRW_REGISTER_TYPE_D || dst.type == BRW_REGISTER_TYPE_UD); assert(src0.type == BRW_REGISTER_TYPE_D || src0.type == BRW_REGISTER_TYPE_UD); struct brw_reg reg = stride(src1, 1, 4, 0); if (devinfo->gen >= 8 || dispatch_width == 8) { brw_ADD(p, dst, src0, reg); } else if (dispatch_width == 16) { brw_push_insn_state(p); brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_ADD(p, firsthalf(dst), firsthalf(src0), reg); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_ADD(p, sechalf(dst), sechalf(src0), suboffset(reg, 2)); brw_pop_insn_state(p); } } void fs_generator::generate_pack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg x, struct brw_reg y) { assert(devinfo->gen >= 7); assert(dst.type == BRW_REGISTER_TYPE_UD); assert(x.type == BRW_REGISTER_TYPE_F); assert(y.type == BRW_REGISTER_TYPE_F); /* From the Ivybridge PRM, Vol4, Part3, Section 6.27 f32to16: * * Because this instruction does not have a 16-bit floating-point type, * the destination data type must be Word (W). * * The destination must be DWord-aligned and specify a horizontal stride * (HorzStride) of 2. The 16-bit result is stored in the lower word of * each destination channel and the upper word is not modified. */ struct brw_reg dst_w = spread(retype(dst, BRW_REGISTER_TYPE_W), 2); /* Give each 32-bit channel of dst the form below, where "." means * unchanged. * 0x....hhhh */ brw_F32TO16(p, dst_w, y); /* Now the form: * 0xhhhh0000 */ brw_SHL(p, dst, dst, brw_imm_ud(16u)); /* And, finally the form of packHalf2x16's output: * 0xhhhhllll */ brw_F32TO16(p, dst_w, x); } void fs_generator::generate_unpack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { assert(devinfo->gen >= 7); assert(dst.type == BRW_REGISTER_TYPE_F); assert(src.type == BRW_REGISTER_TYPE_UD); /* From the Ivybridge PRM, Vol4, Part3, Section 6.26 f16to32: * * Because this instruction does not have a 16-bit floating-point type, * the source data type must be Word (W). The destination type must be * F (Float). */ struct brw_reg src_w = spread(retype(src, BRW_REGISTER_TYPE_W), 2); /* Each channel of src has the form of unpackHalf2x16's input: 0xhhhhllll. * For the Y case, we wish to access only the upper word; therefore * a 16-bit subregister offset is needed. */ assert(inst->opcode == FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X || inst->opcode == FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y); if (inst->opcode == FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y) src_w.subnr += 2; brw_F16TO32(p, dst, src_w); } void fs_generator::generate_shader_time_add(fs_inst *inst, struct brw_reg payload, struct brw_reg offset, struct brw_reg value) { assert(devinfo->gen >= 7); brw_push_insn_state(p); brw_set_default_mask_control(p, true); assert(payload.file == BRW_GENERAL_REGISTER_FILE); struct brw_reg payload_offset = retype(brw_vec1_grf(payload.nr, 0), offset.type); struct brw_reg payload_value = retype(brw_vec1_grf(payload.nr + 1, 0), value.type); assert(offset.file == BRW_IMMEDIATE_VALUE); if (value.file == BRW_GENERAL_REGISTER_FILE) { value.width = BRW_WIDTH_1; value.hstride = BRW_HORIZONTAL_STRIDE_0; value.vstride = BRW_VERTICAL_STRIDE_0; } else { assert(value.file == BRW_IMMEDIATE_VALUE); } /* Trying to deal with setup of the params from the IR is crazy in the FS8 * case, and we don't really care about squeezing every bit of performance * out of this path, so we just emit the MOVs from here. */ brw_MOV(p, payload_offset, offset); brw_MOV(p, payload_value, value); brw_shader_time_add(p, payload, prog_data->binding_table.shader_time_start); brw_pop_insn_state(p); brw_mark_surface_used(prog_data, prog_data->binding_table.shader_time_start); } void fs_generator::enable_debug(const char *shader_name) { debug_flag = true; this->shader_name = shader_name; } int fs_generator::generate_code(const cfg_t *cfg, int dispatch_width) { /* align to 64 byte boundary. */ while (p->next_insn_offset % 64) brw_NOP(p); this->dispatch_width = dispatch_width; if (dispatch_width == 16) brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); int start_offset = p->next_insn_offset; int spill_count = 0, fill_count = 0; int loop_count = 0; struct annotation_info annotation; memset(&annotation, 0, sizeof(annotation)); foreach_block_and_inst (block, fs_inst, inst, cfg) { struct brw_reg src[3], dst; unsigned int last_insn_offset = p->next_insn_offset; bool multiple_instructions_emitted = false; if (unlikely(debug_flag)) annotate(p->devinfo, &annotation, cfg, inst, p->next_insn_offset); for (unsigned int i = 0; i < inst->sources; i++) { src[i] = brw_reg_from_fs_reg(inst, &inst->src[i], devinfo->gen); /* The accumulator result appears to get used for the * conditional modifier generation. When negating a UD * value, there is a 33rd bit generated for the sign in the * accumulator value, so now you can't check, for example, * equality with a 32-bit value. See piglit fs-op-neg-uvec4. */ assert(!inst->conditional_mod || inst->src[i].type != BRW_REGISTER_TYPE_UD || !inst->src[i].negate); } dst = brw_reg_from_fs_reg(inst, &inst->dst, devinfo->gen); brw_set_default_predicate_control(p, inst->predicate); brw_set_default_predicate_inverse(p, inst->predicate_inverse); brw_set_default_flag_reg(p, 0, inst->flag_subreg); brw_set_default_saturate(p, inst->saturate); brw_set_default_mask_control(p, inst->force_writemask_all); brw_set_default_acc_write_control(p, inst->writes_accumulator); brw_set_default_exec_size(p, cvt(inst->exec_size) - 1); assert(inst->base_mrf + inst->mlen <= BRW_MAX_MRF(devinfo->gen)); assert(inst->mlen <= BRW_MAX_MSG_LENGTH); switch (inst->exec_size) { case 1: case 2: case 4: assert(inst->force_writemask_all); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); break; case 8: if (inst->force_sechalf) { brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); } else { brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); } break; case 16: case 32: /* If the instruction writes to more than one register, it needs to * be a "compressed" instruction on Gen <= 5. */ if (inst->dst.component_size(inst->exec_size) > REG_SIZE) brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); else brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); break; default: unreachable("Invalid instruction width"); } switch (inst->opcode) { case BRW_OPCODE_MOV: brw_MOV(p, dst, src[0]); break; case BRW_OPCODE_ADD: brw_ADD(p, dst, src[0], src[1]); break; case BRW_OPCODE_MUL: brw_MUL(p, dst, src[0], src[1]); break; case BRW_OPCODE_AVG: brw_AVG(p, dst, src[0], src[1]); break; case BRW_OPCODE_MACH: brw_MACH(p, dst, src[0], src[1]); break; case BRW_OPCODE_LINE: brw_LINE(p, dst, src[0], src[1]); break; case BRW_OPCODE_MAD: assert(devinfo->gen >= 6); brw_set_default_access_mode(p, BRW_ALIGN_16); if (dispatch_width == 16 && !devinfo->supports_simd16_3src) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_inst *f = brw_MAD(p, firsthalf(dst), firsthalf(src[0]), firsthalf(src[1]), firsthalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_inst *s = brw_MAD(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]), sechalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); if (inst->conditional_mod) { brw_inst_set_cond_modifier(p->devinfo, f, inst->conditional_mod); brw_inst_set_cond_modifier(p->devinfo, s, inst->conditional_mod); multiple_instructions_emitted = true; } } else { brw_MAD(p, dst, src[0], src[1], src[2]); } brw_set_default_access_mode(p, BRW_ALIGN_1); break; case BRW_OPCODE_LRP: assert(devinfo->gen >= 6); brw_set_default_access_mode(p, BRW_ALIGN_16); if (dispatch_width == 16 && !devinfo->supports_simd16_3src) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_inst *f = brw_LRP(p, firsthalf(dst), firsthalf(src[0]), firsthalf(src[1]), firsthalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_inst *s = brw_LRP(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]), sechalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); if (inst->conditional_mod) { brw_inst_set_cond_modifier(p->devinfo, f, inst->conditional_mod); brw_inst_set_cond_modifier(p->devinfo, s, inst->conditional_mod); multiple_instructions_emitted = true; } } else { brw_LRP(p, dst, src[0], src[1], src[2]); } brw_set_default_access_mode(p, BRW_ALIGN_1); break; case BRW_OPCODE_FRC: brw_FRC(p, dst, src[0]); break; case BRW_OPCODE_RNDD: brw_RNDD(p, dst, src[0]); break; case BRW_OPCODE_RNDE: brw_RNDE(p, dst, src[0]); break; case BRW_OPCODE_RNDZ: brw_RNDZ(p, dst, src[0]); break; case BRW_OPCODE_AND: brw_AND(p, dst, src[0], src[1]); break; case BRW_OPCODE_OR: brw_OR(p, dst, src[0], src[1]); break; case BRW_OPCODE_XOR: brw_XOR(p, dst, src[0], src[1]); break; case BRW_OPCODE_NOT: brw_NOT(p, dst, src[0]); break; case BRW_OPCODE_ASR: brw_ASR(p, dst, src[0], src[1]); break; case BRW_OPCODE_SHR: brw_SHR(p, dst, src[0], src[1]); break; case BRW_OPCODE_SHL: brw_SHL(p, dst, src[0], src[1]); break; case BRW_OPCODE_F32TO16: assert(devinfo->gen >= 7); brw_F32TO16(p, dst, src[0]); break; case BRW_OPCODE_F16TO32: assert(devinfo->gen >= 7); brw_F16TO32(p, dst, src[0]); break; case BRW_OPCODE_CMP: /* The Ivybridge/BayTrail WaCMPInstFlagDepClearedEarly workaround says * that when the destination is a GRF that the dependency-clear bit on * the flag register is cleared early. * * Suggested workarounds are to disable coissuing CMP instructions * or to split CMP(16) instructions into two CMP(8) instructions. * * We choose to split into CMP(8) instructions since disabling * coissuing would affect CMP instructions not otherwise affected by * the errata. */ if (dispatch_width == 16 && devinfo->gen == 7 && !devinfo->is_haswell) { if (dst.file == BRW_GENERAL_REGISTER_FILE) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_CMP(p, firsthalf(dst), inst->conditional_mod, firsthalf(src[0]), firsthalf(src[1])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_CMP(p, sechalf(dst), inst->conditional_mod, sechalf(src[0]), sechalf(src[1])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); multiple_instructions_emitted = true; } else if (dst.file == BRW_ARCHITECTURE_REGISTER_FILE) { /* For unknown reasons, the aforementioned workaround is not * sufficient. Overriding the type when the destination is the * null register is necessary but not sufficient by itself. */ assert(dst.nr == BRW_ARF_NULL); dst.type = BRW_REGISTER_TYPE_D; brw_CMP(p, dst, inst->conditional_mod, src[0], src[1]); } else { unreachable("not reached"); } } else { brw_CMP(p, dst, inst->conditional_mod, src[0], src[1]); } break; case BRW_OPCODE_SEL: brw_SEL(p, dst, src[0], src[1]); break; case BRW_OPCODE_BFREV: assert(devinfo->gen >= 7); /* BFREV only supports UD type for src and dst. */ brw_BFREV(p, retype(dst, BRW_REGISTER_TYPE_UD), retype(src[0], BRW_REGISTER_TYPE_UD)); break; case BRW_OPCODE_FBH: assert(devinfo->gen >= 7); /* FBH only supports UD type for dst. */ brw_FBH(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_FBL: assert(devinfo->gen >= 7); /* FBL only supports UD type for dst. */ brw_FBL(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_CBIT: assert(devinfo->gen >= 7); /* CBIT only supports UD type for dst. */ brw_CBIT(p, retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_ADDC: assert(devinfo->gen >= 7); brw_ADDC(p, dst, src[0], src[1]); break; case BRW_OPCODE_SUBB: assert(devinfo->gen >= 7); brw_SUBB(p, dst, src[0], src[1]); break; case BRW_OPCODE_MAC: brw_MAC(p, dst, src[0], src[1]); break; case BRW_OPCODE_BFE: assert(devinfo->gen >= 7); brw_set_default_access_mode(p, BRW_ALIGN_16); if (dispatch_width == 16 && !devinfo->supports_simd16_3src) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_BFE(p, firsthalf(dst), firsthalf(src[0]), firsthalf(src[1]), firsthalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_BFE(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]), sechalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); } else { brw_BFE(p, dst, src[0], src[1], src[2]); } brw_set_default_access_mode(p, BRW_ALIGN_1); break; case BRW_OPCODE_BFI1: assert(devinfo->gen >= 7); /* The Haswell WaForceSIMD8ForBFIInstruction workaround says that we * should * * "Force BFI instructions to be executed always in SIMD8." */ if (dispatch_width == 16 && devinfo->is_haswell) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_BFI1(p, firsthalf(dst), firsthalf(src[0]), firsthalf(src[1])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_BFI1(p, sechalf(dst), sechalf(src[0]), sechalf(src[1])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); } else { brw_BFI1(p, dst, src[0], src[1]); } break; case BRW_OPCODE_BFI2: assert(devinfo->gen >= 7); brw_set_default_access_mode(p, BRW_ALIGN_16); /* The Haswell WaForceSIMD8ForBFIInstruction workaround says that we * should * * "Force BFI instructions to be executed always in SIMD8." * * Otherwise we would be able to emit compressed instructions like we * do for the other three-source instructions. */ if (dispatch_width == 16 && (devinfo->is_haswell || !devinfo->supports_simd16_3src)) { brw_set_default_exec_size(p, BRW_EXECUTE_8); brw_set_default_compression_control(p, BRW_COMPRESSION_NONE); brw_BFI2(p, firsthalf(dst), firsthalf(src[0]), firsthalf(src[1]), firsthalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_2NDHALF); brw_BFI2(p, sechalf(dst), sechalf(src[0]), sechalf(src[1]), sechalf(src[2])); brw_set_default_compression_control(p, BRW_COMPRESSION_COMPRESSED); } else { brw_BFI2(p, dst, src[0], src[1], src[2]); } brw_set_default_access_mode(p, BRW_ALIGN_1); break; case BRW_OPCODE_IF: if (inst->src[0].file != BAD_FILE) { /* The instruction has an embedded compare (only allowed on gen6) */ assert(devinfo->gen == 6); gen6_IF(p, inst->conditional_mod, src[0], src[1]); } else { brw_IF(p, dispatch_width == 16 ? BRW_EXECUTE_16 : BRW_EXECUTE_8); } break; case BRW_OPCODE_ELSE: brw_ELSE(p); break; case BRW_OPCODE_ENDIF: brw_ENDIF(p); break; case BRW_OPCODE_DO: brw_DO(p, dispatch_width == 16 ? BRW_EXECUTE_16 : BRW_EXECUTE_8); break; case BRW_OPCODE_BREAK: brw_BREAK(p); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); break; case BRW_OPCODE_CONTINUE: brw_CONT(p); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); break; case BRW_OPCODE_WHILE: brw_WHILE(p); loop_count++; break; case SHADER_OPCODE_RCP: case SHADER_OPCODE_RSQ: case SHADER_OPCODE_SQRT: case SHADER_OPCODE_EXP2: case SHADER_OPCODE_LOG2: case SHADER_OPCODE_SIN: case SHADER_OPCODE_COS: assert(devinfo->gen < 6 || inst->mlen == 0); assert(inst->conditional_mod == BRW_CONDITIONAL_NONE); if (devinfo->gen >= 7) { gen6_math(p, dst, brw_math_function(inst->opcode), src[0], brw_null_reg()); } else if (devinfo->gen == 6) { generate_math_gen6(inst, dst, src[0], brw_null_reg()); } else if (devinfo->gen == 5 || devinfo->is_g4x) { generate_math_g45(inst, dst, src[0]); } else { generate_math_gen4(inst, dst, src[0]); } break; case SHADER_OPCODE_INT_QUOTIENT: case SHADER_OPCODE_INT_REMAINDER: case SHADER_OPCODE_POW: assert(devinfo->gen < 6 || inst->mlen == 0); assert(inst->conditional_mod == BRW_CONDITIONAL_NONE); if (devinfo->gen >= 7 && inst->opcode == SHADER_OPCODE_POW) { gen6_math(p, dst, brw_math_function(inst->opcode), src[0], src[1]); } else if (devinfo->gen >= 6) { generate_math_gen6(inst, dst, src[0], src[1]); } else { generate_math_gen4(inst, dst, src[0]); } break; case FS_OPCODE_CINTERP: brw_MOV(p, dst, src[0]); break; case FS_OPCODE_LINTERP: generate_linterp(inst, dst, src); break; case FS_OPCODE_PIXEL_X: assert(src[0].type == BRW_REGISTER_TYPE_UW); src[0].subnr = 0 * type_sz(src[0].type); brw_MOV(p, dst, stride(src[0], 8, 4, 1)); break; case FS_OPCODE_PIXEL_Y: assert(src[0].type == BRW_REGISTER_TYPE_UW); src[0].subnr = 4 * type_sz(src[0].type); brw_MOV(p, dst, stride(src[0], 8, 4, 1)); break; case FS_OPCODE_GET_BUFFER_SIZE: generate_get_buffer_size(inst, dst, src[0], src[1]); break; case SHADER_OPCODE_TEX: case FS_OPCODE_TXB: case SHADER_OPCODE_TXD: case SHADER_OPCODE_TXF: case SHADER_OPCODE_TXF_CMS: case SHADER_OPCODE_TXF_CMS_W: case SHADER_OPCODE_TXF_UMS: case SHADER_OPCODE_TXF_MCS: case SHADER_OPCODE_TXL: case SHADER_OPCODE_TXS: case SHADER_OPCODE_LOD: case SHADER_OPCODE_TG4: case SHADER_OPCODE_TG4_OFFSET: case SHADER_OPCODE_SAMPLEINFO: generate_tex(inst, dst, src[0], src[1], src[2]); break; case FS_OPCODE_DDX_COARSE: case FS_OPCODE_DDX_FINE: generate_ddx(inst->opcode, dst, src[0]); break; case FS_OPCODE_DDY_COARSE: case FS_OPCODE_DDY_FINE: assert(src[1].file == BRW_IMMEDIATE_VALUE); generate_ddy(inst->opcode, dst, src[0], src[1].ud); break; case SHADER_OPCODE_GEN4_SCRATCH_WRITE: generate_scratch_write(inst, src[0]); spill_count++; break; case SHADER_OPCODE_GEN4_SCRATCH_READ: generate_scratch_read(inst, dst); fill_count++; break; case SHADER_OPCODE_GEN7_SCRATCH_READ: generate_scratch_read_gen7(inst, dst); fill_count++; break; case SHADER_OPCODE_MOV_INDIRECT: generate_mov_indirect(inst, dst, src[0], src[1]); break; case SHADER_OPCODE_URB_READ_SIMD8: case SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT: generate_urb_read(inst, dst, src[0]); break; case SHADER_OPCODE_URB_WRITE_SIMD8: case SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT: case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED: case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT: generate_urb_write(inst, src[0]); break; case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD: generate_uniform_pull_constant_load(inst, dst, src[0], src[1]); break; case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD_GEN7: generate_uniform_pull_constant_load_gen7(inst, dst, src[0], src[1]); break; case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD: generate_varying_pull_constant_load(inst, dst, src[0], src[1]); break; case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN7: generate_varying_pull_constant_load_gen7(inst, dst, src[0], src[1]); break; case FS_OPCODE_REP_FB_WRITE: case FS_OPCODE_FB_WRITE: generate_fb_write(inst, src[0]); break; case FS_OPCODE_BLORP_FB_WRITE: generate_blorp_fb_write(inst); break; case FS_OPCODE_MOV_DISPATCH_TO_FLAGS: generate_mov_dispatch_to_flags(inst); break; case FS_OPCODE_DISCARD_JUMP: generate_discard_jump(inst); break; case SHADER_OPCODE_SHADER_TIME_ADD: generate_shader_time_add(inst, src[0], src[1], src[2]); break; case SHADER_OPCODE_UNTYPED_ATOMIC: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_untyped_atomic(p, dst, src[0], src[1], src[2].ud, inst->mlen, !inst->dst.is_null()); break; case SHADER_OPCODE_UNTYPED_SURFACE_READ: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_untyped_surface_read(p, dst, src[0], src[1], inst->mlen, src[2].ud); break; case SHADER_OPCODE_UNTYPED_SURFACE_WRITE: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_untyped_surface_write(p, src[0], src[1], inst->mlen, src[2].ud); break; case SHADER_OPCODE_TYPED_ATOMIC: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_typed_atomic(p, dst, src[0], src[1], src[2].ud, inst->mlen, !inst->dst.is_null()); break; case SHADER_OPCODE_TYPED_SURFACE_READ: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_typed_surface_read(p, dst, src[0], src[1], inst->mlen, src[2].ud); break; case SHADER_OPCODE_TYPED_SURFACE_WRITE: assert(src[2].file == BRW_IMMEDIATE_VALUE); brw_typed_surface_write(p, src[0], src[1], inst->mlen, src[2].ud); break; case SHADER_OPCODE_MEMORY_FENCE: brw_memory_fence(p, dst); break; case FS_OPCODE_SET_SIMD4X2_OFFSET: generate_set_simd4x2_offset(inst, dst, src[0]); break; case SHADER_OPCODE_FIND_LIVE_CHANNEL: brw_find_live_channel(p, dst); break; case SHADER_OPCODE_BROADCAST: brw_broadcast(p, dst, src[0], src[1]); break; case SHADER_OPCODE_EXTRACT_BYTE: { assert(src[0].type == BRW_REGISTER_TYPE_D || src[0].type == BRW_REGISTER_TYPE_UD); enum brw_reg_type type = src[0].type == BRW_REGISTER_TYPE_D ? BRW_REGISTER_TYPE_B : BRW_REGISTER_TYPE_UB; brw_MOV(p, dst, spread(suboffset(retype(src[0], type), src[1].ud), 4)); break; } case SHADER_OPCODE_EXTRACT_WORD: { assert(src[0].type == BRW_REGISTER_TYPE_D || src[0].type == BRW_REGISTER_TYPE_UD); enum brw_reg_type type = src[0].type == BRW_REGISTER_TYPE_D ? BRW_REGISTER_TYPE_W : BRW_REGISTER_TYPE_UW; brw_MOV(p, dst, spread(suboffset(retype(src[0], type), src[1].ud), 2)); break; } case FS_OPCODE_SET_SAMPLE_ID: generate_set_sample_id(inst, dst, src[0], src[1]); break; case FS_OPCODE_PACK_HALF_2x16_SPLIT: generate_pack_half_2x16_split(inst, dst, src[0], src[1]); break; case FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X: case FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y: generate_unpack_half_2x16_split(inst, dst, src[0]); break; case FS_OPCODE_PLACEHOLDER_HALT: /* This is the place where the final HALT needs to be inserted if * we've emitted any discards. If not, this will emit no code. */ if (!patch_discard_jumps_to_fb_writes()) { if (unlikely(debug_flag)) { annotation.ann_count--; } } break; case FS_OPCODE_INTERPOLATE_AT_CENTROID: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_CENTROID); break; case FS_OPCODE_INTERPOLATE_AT_SAMPLE: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_SAMPLE); break; case FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_SHARED_OFFSET); break; case FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET: generate_pixel_interpolator_query(inst, dst, src[0], src[1], GEN7_PIXEL_INTERPOLATOR_LOC_PER_SLOT_OFFSET); break; case CS_OPCODE_CS_TERMINATE: generate_cs_terminate(inst, src[0]); break; case SHADER_OPCODE_BARRIER: generate_barrier(inst, src[0]); break; case FS_OPCODE_PACK_STENCIL_REF: generate_stencil_ref_packing(inst, dst, src[0]); break; default: unreachable("Unsupported opcode"); case SHADER_OPCODE_LOAD_PAYLOAD: unreachable("Should be lowered by lower_load_payload()"); } if (multiple_instructions_emitted) continue; if (inst->no_dd_clear || inst->no_dd_check || inst->conditional_mod) { assert(p->next_insn_offset == last_insn_offset + 16 || !"conditional_mod, no_dd_check, or no_dd_clear set for IR " "emitting more than 1 instruction"); brw_inst *last = &p->store[last_insn_offset / 16]; if (inst->conditional_mod) brw_inst_set_cond_modifier(p->devinfo, last, inst->conditional_mod); brw_inst_set_no_dd_clear(p->devinfo, last, inst->no_dd_clear); brw_inst_set_no_dd_check(p->devinfo, last, inst->no_dd_check); } } brw_set_uip_jip(p); annotation_finalize(&annotation, p->next_insn_offset); #ifndef NDEBUG bool validated = brw_validate_instructions(p, start_offset, &annotation); #else if (unlikely(debug_flag)) brw_validate_instructions(p, start_offset, &annotation); #endif int before_size = p->next_insn_offset - start_offset; brw_compact_instructions(p, start_offset, annotation.ann_count, annotation.ann); int after_size = p->next_insn_offset - start_offset; if (unlikely(debug_flag)) { fprintf(stderr, "Native code for %s\n" "SIMD%d shader: %d instructions. %d loops. %u cycles. %d:%d spills:fills. Promoted %u constants. Compacted %d to %d" " bytes (%.0f%%)\n", shader_name, dispatch_width, before_size / 16, loop_count, cfg->cycle_count, spill_count, fill_count, promoted_constants, before_size, after_size, 100.0f * (before_size - after_size) / before_size); dump_assembly(p->store, annotation.ann_count, annotation.ann, p->devinfo); ralloc_free(annotation.mem_ctx); } assert(validated); compiler->shader_debug_log(log_data, "%s SIMD%d shader: %d inst, %d loops, %u cycles, " "%d:%d spills:fills, Promoted %u constants, " "compacted %d to %d bytes.", _mesa_shader_stage_to_abbrev(stage), dispatch_width, before_size / 16, loop_count, cfg->cycle_count, spill_count, fill_count, promoted_constants, before_size, after_size); return start_offset; } const unsigned * fs_generator::get_assembly(unsigned int *assembly_size) { return brw_get_program(p, assembly_size); }