/* * Copyright © 2010, 2011, 2012 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 gen8_fs_generate.cpp * * Code generation for Gen8+ hardware. */ extern "C" { #include "main/macros.h" #include "brw_context.h" } /* extern "C" */ #include "brw_fs.h" #include "brw_cfg.h" #include "glsl/ir_print_visitor.h" gen8_fs_generator::gen8_fs_generator(struct brw_context *brw, struct brw_wm_compile *c, struct gl_shader_program *shader_prog, struct gl_fragment_program *fp, bool dual_source_output) : gen8_generator(brw, shader_prog, fp ? &fp->Base : NULL, c), c(c), fp(fp), dual_source_output(dual_source_output) { } gen8_fs_generator::~gen8_fs_generator() { } void gen8_fs_generator::mark_surface_used(unsigned surf_index) { assert(surf_index < BRW_MAX_SURFACES); c->prog_data.base.binding_table.size_bytes = MAX2(c->prog_data.base.binding_table.size_bytes, (surf_index + 1) * 4); } void gen8_fs_generator::generate_fb_write(fs_inst *ir) { /* Disable the discard condition while setting up the header. */ default_state.predicate = BRW_PREDICATE_NONE; default_state.predicate_inverse = false; default_state.flag_subreg_nr = 0; if (ir->header_present) { /* The GPU will use the predicate on SENDC, unless the header is present. */ if (fp && fp->UsesKill) { gen8_instruction *mov = MOV(retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW), brw_flag_reg(0, 1)); gen8_set_mask_control(mov, BRW_MASK_DISABLE); } gen8_instruction *mov = MOV_RAW(brw_message_reg(ir->base_mrf), brw_vec8_grf(0, 0)); gen8_set_exec_size(mov, BRW_EXECUTE_16); if (ir->target > 0 && c->key.replicate_alpha) { /* Set "Source0 Alpha Present to RenderTarget" bit in the header. */ OR(vec1(retype(brw_message_reg(ir->base_mrf), BRW_REGISTER_TYPE_UD)), vec1(retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)), brw_imm_ud(1 << 11)); } if (ir->target > 0) { /* Set the render target index for choosing BLEND_STATE. */ MOV(retype(brw_vec1_reg(BRW_MESSAGE_REGISTER_FILE, ir->base_mrf, 2), BRW_REGISTER_TYPE_UD), brw_imm_ud(ir->target)); } } /* Set the predicate back to get the conditional write if necessary for * discards. */ default_state.predicate = ir->predicate; default_state.predicate_inverse = ir->predicate_inverse; default_state.flag_subreg_nr = ir->flag_subreg; gen8_instruction *inst = next_inst(BRW_OPCODE_SENDC); gen8_set_dst(brw, inst, retype(vec8(brw_null_reg()), BRW_REGISTER_TYPE_UW)); gen8_set_src0(brw, inst, brw_message_reg(ir->base_mrf)); /* Set up the "Message Specific Control" bits for the Data Port Message * Descriptor. These are documented in the "Render Target Write" message's * "Message Descriptor" documentation (vol5c.2). */ uint32_t msg_type; /* Set the Message Type */ if (this->dual_source_output) msg_type = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN01; else if (dispatch_width == 16) msg_type = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE; else msg_type = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01; uint32_t msg_control = msg_type; /* "Last Render Target Select" must be set on all writes to the last of * the render targets (if using MRT), or always for a single RT scenario. */ if ((ir->target == c->key.nr_color_regions - 1) || !c->key.nr_color_regions) msg_control |= (1 << 4); /* Last Render Target Select */ uint32_t surf_index = c->prog_data.binding_table.render_target_start + ir->target; gen8_set_dp_message(brw, inst, GEN6_SFID_DATAPORT_RENDER_CACHE, surf_index, GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE, msg_control, ir->mlen, 0, ir->header_present, ir->eot); mark_surface_used(surf_index); } void gen8_fs_generator::generate_linterp(fs_inst *inst, struct brw_reg dst, struct brw_reg *src) { struct brw_reg delta_x = src[0]; struct brw_reg delta_y = src[1]; struct brw_reg interp = src[2]; (void) delta_y; assert(delta_y.nr == delta_x.nr + 1); PLN(dst, interp, delta_x); } void gen8_fs_generator::generate_tex(fs_inst *ir, struct brw_reg dst, struct brw_reg src) { int msg_type = -1; int rlen = 4; uint32_t simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD8; assert(src.file == BRW_GENERAL_REGISTER_FILE); if (dispatch_width == 16 && !ir->force_uncompressed && !ir->force_sechalf) simd_mode = BRW_SAMPLER_SIMD_MODE_SIMD16; switch (ir->opcode) { case SHADER_OPCODE_TEX: if (ir->shadow_compare) { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE; } break; case FS_OPCODE_TXB: if (ir->shadow_compare) { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS_COMPARE; } else { msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_BIAS; } break; case SHADER_OPCODE_TXL: if (ir->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 (ir->shadow_compare) { 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: msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DMS; break; case SHADER_OPCODE_TXF_UMS: msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DSS; break; case SHADER_OPCODE_TXF_MCS: 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 (ir->shadow_compare) { assert(brw->gen >= 7); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_C; } else { assert(brw->gen >= 6); msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4; } break; case SHADER_OPCODE_TG4_OFFSET: assert(brw->gen >= 7); if (ir->shadow_compare) { msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO_C; } else { msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO; } break; default: assert(!"not reached"); break; } assert(msg_type != -1); if (simd_mode == BRW_SAMPLER_SIMD_MODE_SIMD16) { rlen = 8; dst = vec16(dst); } if (ir->header_present) { /* The send-from-GRF for SIMD16 texturing with a header has an extra * hardware register allocated to it, which we need to skip over (since * our coordinates in the payload are in the even-numbered registers, * and the header comes right before the first one. */ if (dispatch_width == 16) src.nr++; unsigned save_exec_size = default_state.exec_size; default_state.exec_size = BRW_EXECUTE_8; MOV_RAW(src, brw_vec8_grf(0, 0)); if (ir->texture_offset) { /* Set the texel offset bits. */ MOV_RAW(retype(brw_vec1_grf(src.nr, 2), BRW_REGISTER_TYPE_UD), brw_imm_ud(ir->texture_offset)); } if (ir->sampler >= 16) { /* The "Sampler Index" field can only store values between 0 and 15. * However, we can add an offset to the "Sampler State Pointer" * field, effectively selecting a different set of 16 samplers. * * The "Sampler State Pointer" needs to be aligned to a 32-byte * offset, and each sampler state is only 16-bytes, so we can't * exclusively use the offset - we have to use both. */ gen8_instruction *add = ADD(get_element_ud(src, 3), get_element_ud(brw_vec8_grf(0, 0), 3), brw_imm_ud(16 * (ir->sampler / 16) * sizeof(gen7_sampler_state))); gen8_set_mask_control(add, BRW_MASK_DISABLE); } default_state.exec_size = save_exec_size; } uint32_t surf_index = c->prog_data.base.binding_table.texture_start + ir->sampler; gen8_instruction *inst = next_inst(BRW_OPCODE_SEND); gen8_set_dst(brw, inst, dst); gen8_set_src0(brw, inst, src); gen8_set_sampler_message(brw, inst, surf_index, ir->sampler % 16, msg_type, rlen, ir->mlen, ir->header_present, simd_mode); mark_surface_used(surf_index); } /* 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 * * and we're trying 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 for DDY, it's harder, as we want to produce the pairs swizzled * between each other. We could probably do it like ddx and swizzle the right * order later, but bail for now and just produce * ((ss0.tl - ss0.bl)x4 (ss1.tl - ss1.bl)x4) */ void gen8_fs_generator::generate_ddx(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { unsigned vstride, width; if (c->key.high_quality_derivatives) { /* 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, 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, BRW_REGISTER_TYPE_F, vstride, width, BRW_HORIZONTAL_STRIDE_0, BRW_SWIZZLE_XYZW, WRITEMASK_XYZW); ADD(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 gen8_fs_generator::generate_ddy(fs_inst *inst, struct brw_reg dst, struct brw_reg src, bool negate_value) { unsigned hstride; unsigned src0_swizzle; unsigned src1_swizzle; unsigned src1_subnr; if (c->key.high_quality_derivatives) { /* Produce accurate derivatives. */ hstride = BRW_HORIZONTAL_STRIDE_1; src0_swizzle = BRW_SWIZZLE_XYXY; src1_swizzle = BRW_SWIZZLE_ZWZW; src1_subnr = 0; default_state.access_mode = BRW_ALIGN_16; } else { /* Replicate the derivative at the top-left pixel to other pixels. */ hstride = BRW_HORIZONTAL_STRIDE_0; src0_swizzle = BRW_SWIZZLE_XYZW; src1_swizzle = BRW_SWIZZLE_XYZW; src1_subnr = 2; } struct brw_reg src0 = brw_reg(src.file, src.nr, 0, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, hstride, src0_swizzle, WRITEMASK_XYZW); struct brw_reg src1 = brw_reg(src.file, src.nr, src1_subnr, BRW_REGISTER_TYPE_F, BRW_VERTICAL_STRIDE_4, BRW_WIDTH_4, hstride, src1_swizzle, WRITEMASK_XYZW); if (negate_value) ADD(dst, src1, negate(src0)); else ADD(dst, src0, negate(src1)); default_state.access_mode = BRW_ALIGN_1; } void gen8_fs_generator::generate_scratch_write(fs_inst *ir, struct brw_reg src) { MOV(retype(brw_message_reg(ir->base_mrf + 1), BRW_REGISTER_TYPE_UD), retype(src, BRW_REGISTER_TYPE_UD)); struct brw_reg mrf = retype(brw_message_reg(ir->base_mrf), BRW_REGISTER_TYPE_UD); const int num_regs = dispatch_width / 8; uint32_t msg_control; if (num_regs == 1) msg_control = BRW_DATAPORT_OWORD_BLOCK_2_OWORDS; else msg_control = BRW_DATAPORT_OWORD_BLOCK_4_OWORDS; /* Set up the message header. This is g0, with g0.2 filled with * the offset. We don't want to leave our offset around in g0 or * it'll screw up texture samples, so set it up inside the message * reg. */ unsigned save_exec_size = default_state.exec_size; default_state.exec_size = BRW_EXECUTE_8; MOV_RAW(mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); /* set message header global offset field (reg 0, element 2) */ MOV_RAW(get_element_ud(mrf, 2), brw_imm_ud(ir->offset / 16)); struct brw_reg dst; if (dispatch_width == 16) dst = retype(vec16(brw_null_reg()), BRW_REGISTER_TYPE_UW); else dst = retype(vec8(brw_null_reg()), BRW_REGISTER_TYPE_UW); default_state.exec_size = BRW_EXECUTE_16; gen8_instruction *send = next_inst(BRW_OPCODE_SEND); gen8_set_dst(brw, send, dst); gen8_set_src0(brw, send, mrf); gen8_set_dp_message(brw, send, GEN7_SFID_DATAPORT_DATA_CACHE, 255, /* binding table index: stateless access */ GEN6_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE, msg_control, 1 + num_regs, /* mlen */ 0, /* rlen */ true, /* header present */ false); /* EOT */ default_state.exec_size = save_exec_size; } void gen8_fs_generator::generate_scratch_read(fs_inst *ir, struct brw_reg dst) { struct brw_reg mrf = retype(brw_message_reg(ir->base_mrf), BRW_REGISTER_TYPE_UD); const int num_regs = dispatch_width / 8; uint32_t msg_control; if (num_regs == 1) msg_control = BRW_DATAPORT_OWORD_BLOCK_2_OWORDS; else msg_control = BRW_DATAPORT_OWORD_BLOCK_4_OWORDS; unsigned save_exec_size = default_state.exec_size; default_state.exec_size = BRW_EXECUTE_8; MOV_RAW(mrf, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD)); /* set message header global offset field (reg 0, element 2) */ MOV_RAW(get_element_ud(mrf, 2), brw_imm_ud(ir->offset / 16)); gen8_instruction *send = next_inst(BRW_OPCODE_SEND); gen8_set_dst(brw, send, retype(dst, BRW_REGISTER_TYPE_UW)); gen8_set_src0(brw, send, mrf); gen8_set_dp_message(brw, send, GEN7_SFID_DATAPORT_DATA_CACHE, 255, /* binding table index: stateless access */ BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, msg_control, 1, /* mlen */ num_regs, /* rlen */ true, /* header present */ false); /* EOT */ default_state.exec_size = save_exec_size; } void gen8_fs_generator::generate_scratch_read_gen7(fs_inst *ir, struct brw_reg dst) { unsigned save_exec_size = default_state.exec_size; gen8_instruction *send = next_inst(BRW_OPCODE_SEND); int num_regs = dispatch_width / 8; /* According to the docs, offset is "A 12-bit HWord offset into the memory * Immediate Memory buffer as specified by binding table 0xFF." An HWORD * is 32 bytes, which happens to be the size of a register. */ int offset = ir->offset / REG_SIZE; /* The HW requires that the header is present; this is to get the g0.5 * scratch offset. */ gen8_set_src0(brw, send, brw_vec8_grf(0, 0)); gen8_set_dst(brw, send, retype(dst, BRW_REGISTER_TYPE_UW)); gen8_set_dp_scratch_message(brw, send, false, /* scratch read */ false, /* OWords */ false, /* invalidate after read */ num_regs, offset, 1, /* mlen - just g0 */ num_regs, /* rlen */ true, /* header present */ false); /* EOT */ default_state.exec_size = save_exec_size; } void gen8_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.dw1.ud; assert(offset.file == BRW_GENERAL_REGISTER_FILE); /* Reference only the dword we need lest we anger validate_reg() with * reg.width > reg.execszie. */ offset = brw_vec1_grf(offset.nr, 0); gen8_instruction *send = next_inst(BRW_OPCODE_SEND); gen8_set_mask_control(send, BRW_MASK_DISABLE); /* We use the SIMD4x2 mode because we want to end up with 4 constants 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; gen8_set_dst(brw, send, dst); gen8_set_src0(brw, send, offset); gen8_set_sampler_message(brw, send, surf_index, 0, /* The LD message ignores the sampler unit. */ GEN5_SAMPLER_MESSAGE_SAMPLE_LD, 1, /* rlen */ 1, /* mlen */ false, /* no header */ BRW_SAMPLER_SIMD_MODE_SIMD4X2); mark_surface_used(surf_index); } void gen8_fs_generator::generate_varying_pull_constant_load(fs_inst *ir, struct brw_reg dst, struct brw_reg index, struct brw_reg offset) { /* 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(!ir->header_present); assert(!ir->mlen); assert(index.file == BRW_IMMEDIATE_VALUE && index.type == BRW_REGISTER_TYPE_UD); uint32_t surf_index = index.dw1.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; } gen8_instruction *send = next_inst(BRW_OPCODE_SEND); gen8_set_dst(brw, send, dst); gen8_set_src0(brw, send, offset); gen8_set_sampler_message(brw, send, surf_index, 0, /* The LD message ignore the sampler unit. */ GEN5_SAMPLER_MESSAGE_SAMPLE_LD, rlen, /* rlen */ mlen, /* mlen */ false, /* no header */ simd_mode); mark_surface_used(surf_index); } /** * Cause the current pixel/sample mask (from R1.7 bits 15:0) to be transferred * into the flags register (f0.0). */ void gen8_fs_generator::generate_mov_dispatch_to_flags(fs_inst *ir) { struct brw_reg flags = brw_flag_reg(0, ir->flag_subreg); struct brw_reg dispatch_mask = retype(brw_vec1_grf(1, 7), BRW_REGISTER_TYPE_UW); gen8_instruction *mov = MOV(flags, dispatch_mask); gen8_set_mask_control(mov, BRW_MASK_DISABLE); } void gen8_fs_generator::generate_discard_jump(fs_inst *ir) { /* 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). */ discard_halt_patches.push_tail(new(mem_ctx) ip_record(nr_inst)); HALT(); } void gen8_fs_generator::patch_discard_jumps_to_fb_writes() { if (discard_halt_patches.is_empty()) return; /* 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. */ gen8_instruction *last_halt = HALT(); gen8_set_uip(last_halt, 16); gen8_set_jip(last_halt, 16); int ip = nr_inst; foreach_list(node, &discard_halt_patches) { ip_record *patch_ip = (ip_record *) node; gen8_instruction *patch = &store[patch_ip->ip]; assert(gen8_opcode(patch) == BRW_OPCODE_HALT); /* HALT takes an instruction distance from the pre-incremented IP. */ gen8_set_uip(patch, (ip - patch_ip->ip) * 16); } this->discard_halt_patches.make_empty(); } /** * Sets the first dword of a vgrf for 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 instruction. */ void gen8_fs_generator::generate_set_simd4x2_offset(fs_inst *ir, struct brw_reg dst, struct brw_reg value) { assert(value.file == BRW_IMMEDIATE_VALUE); MOV_RAW(retype(brw_vec1_reg(dst.file, dst.nr, 0), value.type), value); } /** * Sets vstride=16, width=8, hstride=2 or vstride=0, width=1, hstride=0 * (when mask is passed as a uniform) of register mask before moving it * to register dst. */ void gen8_fs_generator::generate_set_omask(fs_inst *inst, struct brw_reg dst, struct brw_reg mask) { assert(dst.type == BRW_REGISTER_TYPE_UW); if (dispatch_width == 16) dst = vec16(dst); if (mask.vstride == BRW_VERTICAL_STRIDE_8 && mask.width == BRW_WIDTH_8 && mask.hstride == BRW_HORIZONTAL_STRIDE_1) { mask = stride(mask, 16, 8, 2); } else { assert(mask.vstride == BRW_VERTICAL_STRIDE_0 && mask.width == BRW_WIDTH_1 && mask.hstride == BRW_HORIZONTAL_STRIDE_0); } unsigned save_exec_size = default_state.exec_size; default_state.exec_size = BRW_EXECUTE_8; gen8_instruction *mov = MOV(dst, retype(mask, dst.type)); gen8_set_mask_control(mov, BRW_MASK_DISABLE); default_state.exec_size = save_exec_size; } /** * Do a special ADD with vstride=1, width=4, hstride=0 for src1. */ void gen8_fs_generator::generate_set_sample_id(fs_inst *ir, 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 = retype(stride(src1, 1, 4, 0), BRW_REGISTER_TYPE_UW); unsigned save_exec_size = default_state.exec_size; default_state.exec_size = BRW_EXECUTE_8; gen8_instruction *add = ADD(dst, src0, reg); gen8_set_mask_control(add, BRW_MASK_DISABLE); if (dispatch_width == 16) { add = ADD(offset(dst, 1), offset(src0, 1), suboffset(reg, 2)); gen8_set_mask_control(add, BRW_MASK_DISABLE); } default_state.exec_size = save_exec_size; } /** * Change the register's data type from UD to HF, doubling the strides in order * to compensate for halving the data type width. */ static struct brw_reg ud_reg_to_hf(struct brw_reg r) { assert(r.type == BRW_REGISTER_TYPE_UD); r.type = BRW_REGISTER_TYPE_HF; /* The BRW_*_STRIDE enums are defined so that incrementing the field * doubles the real stride. */ if (r.hstride != 0) ++r.hstride; if (r.vstride != 0) ++r.vstride; return r; } void gen8_fs_generator::generate_pack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg x, struct brw_reg y) { assert(dst.type == BRW_REGISTER_TYPE_UD); assert(x.type == BRW_REGISTER_TYPE_F); assert(y.type == BRW_REGISTER_TYPE_F); struct brw_reg dst_hf = ud_reg_to_hf(dst); /* Give each 32-bit channel of dst the form below , where "." means * unchanged. * 0x....hhhh */ MOV(dst_hf, y); /* Now the form: * 0xhhhh0000 */ SHL(dst, dst, brw_imm_ud(16u)); /* And, finally the form of packHalf2x16's output: * 0xhhhhllll */ MOV(dst_hf, x); } void gen8_fs_generator::generate_unpack_half_2x16_split(fs_inst *inst, struct brw_reg dst, struct brw_reg src) { assert(dst.type == BRW_REGISTER_TYPE_F); assert(src.type == BRW_REGISTER_TYPE_UD); struct brw_reg src_hf = ud_reg_to_hf(src); /* 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_hf.subnr += 2; MOV(dst, src_hf); } void gen8_fs_generator::generate_code(exec_list *instructions) { int last_native_inst_offset = next_inst_offset; const char *last_annotation_string = NULL; const void *last_annotation_ir = NULL; if (unlikely(INTEL_DEBUG & DEBUG_WM)) { if (prog) { fprintf(stderr, "Native code for %s fragment shader %d (SIMD%d dispatch):\n", shader_prog->Label ? shader_prog->Label : "unnamed", shader_prog->Name, dispatch_width); } else if (fp) { fprintf(stderr, "Native code for fragment program %d (SIMD%d dispatch):\n", prog->Id, dispatch_width); } else { fprintf(stderr, "Native code for blorp program (SIMD%d dispatch):\n", dispatch_width); } } cfg_t *cfg = NULL; if (unlikely(INTEL_DEBUG & DEBUG_WM)) cfg = new(mem_ctx) cfg_t(instructions); foreach_list(node, instructions) { fs_inst *ir = (fs_inst *) node; struct brw_reg src[3], dst; if (unlikely(INTEL_DEBUG & DEBUG_WM)) { foreach_list(node, &cfg->block_list) { bblock_link *link = (bblock_link *)node; bblock_t *block = link->block; if (block->start == ir) { fprintf(stderr, " START B%d", block->block_num); foreach_list(predecessor_node, &block->parents) { bblock_link *predecessor_link = (bblock_link *)predecessor_node; bblock_t *predecessor_block = predecessor_link->block; fprintf(stderr, " <-B%d", predecessor_block->block_num); } fprintf(stderr, "\n"); } } if (last_annotation_ir != ir->ir) { last_annotation_ir = ir->ir; if (last_annotation_ir) { fprintf(stderr, " "); if (prog) { ((ir_instruction *) ir->ir)->fprint(stderr); } else if (prog) { const prog_instruction *fpi; fpi = (const prog_instruction *) ir->ir; fprintf(stderr, "%d: ", (int)(fpi - prog->Instructions)); _mesa_fprint_instruction_opt(stderr, fpi, 0, PROG_PRINT_DEBUG, NULL); } fprintf(stderr, "\n"); } } if (last_annotation_string != ir->annotation) { last_annotation_string = ir->annotation; if (last_annotation_string) fprintf(stderr, " %s\n", last_annotation_string); } } for (unsigned int i = 0; i < 3; i++) { src[i] = brw_reg_from_fs_reg(&ir->src[i]); /* 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(!ir->conditional_mod || ir->src[i].type != BRW_REGISTER_TYPE_UD || !ir->src[i].negate); } dst = brw_reg_from_fs_reg(&ir->dst); default_state.conditional_mod = ir->conditional_mod; default_state.predicate = ir->predicate; default_state.predicate_inverse = ir->predicate_inverse; default_state.saturate = ir->saturate; default_state.flag_subreg_nr = ir->flag_subreg; if (dispatch_width == 16 && !ir->force_uncompressed) default_state.exec_size = BRW_EXECUTE_16; else default_state.exec_size = BRW_EXECUTE_8; /* fs_inst::force_sechalf is only used for original Gen4 code, so we * don't handle it. Add qtr_control to default_state if that changes. */ assert(!ir->force_sechalf); switch (ir->opcode) { case BRW_OPCODE_MOV: MOV(dst, src[0]); break; case BRW_OPCODE_ADD: ADD(dst, src[0], src[1]); break; case BRW_OPCODE_MUL: MUL(dst, src[0], src[1]); break; case BRW_OPCODE_MACH: MACH(dst, src[0], src[1]); break; case BRW_OPCODE_MAD: default_state.access_mode = BRW_ALIGN_16; MAD(dst, src[0], src[1], src[2]); default_state.access_mode = BRW_ALIGN_1; break; case BRW_OPCODE_LRP: default_state.access_mode = BRW_ALIGN_16; LRP(dst, src[0], src[1], src[2]); default_state.access_mode = BRW_ALIGN_1; break; case BRW_OPCODE_FRC: FRC(dst, src[0]); break; case BRW_OPCODE_RNDD: RNDD(dst, src[0]); break; case BRW_OPCODE_RNDE: RNDE(dst, src[0]); break; case BRW_OPCODE_RNDZ: RNDZ(dst, src[0]); break; case BRW_OPCODE_AND: AND(dst, src[0], src[1]); break; case BRW_OPCODE_OR: OR(dst, src[0], src[1]); break; case BRW_OPCODE_XOR: XOR(dst, src[0], src[1]); break; case BRW_OPCODE_NOT: NOT(dst, src[0]); break; case BRW_OPCODE_ASR: ASR(dst, src[0], src[1]); break; case BRW_OPCODE_SHR: SHR(dst, src[0], src[1]); break; case BRW_OPCODE_SHL: SHL(dst, src[0], src[1]); break; case BRW_OPCODE_F32TO16: MOV(retype(dst, BRW_REGISTER_TYPE_HF), src[0]); break; case BRW_OPCODE_F16TO32: MOV(dst, retype(src[0], BRW_REGISTER_TYPE_HF)); break; case BRW_OPCODE_CMP: CMP(dst, ir->conditional_mod, src[0], src[1]); break; case BRW_OPCODE_SEL: SEL(dst, src[0], src[1]); break; case BRW_OPCODE_BFREV: /* BFREV only supports UD type for src and dst. */ BFREV(retype(dst, BRW_REGISTER_TYPE_UD), retype(src[0], BRW_REGISTER_TYPE_UD)); break; case BRW_OPCODE_FBH: /* FBH only supports UD type for dst. */ FBH(retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_FBL: /* FBL only supports UD type for dst. */ FBL(retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_CBIT: /* CBIT only supports UD type for dst. */ CBIT(retype(dst, BRW_REGISTER_TYPE_UD), src[0]); break; case BRW_OPCODE_ADDC: ADDC(dst, src[0], src[1]); break; case BRW_OPCODE_SUBB: SUBB(dst, src[0], src[1]); break; case BRW_OPCODE_BFE: default_state.access_mode = BRW_ALIGN_16; BFE(dst, src[0], src[1], src[2]); default_state.access_mode = BRW_ALIGN_1; break; case BRW_OPCODE_BFI1: BFI1(dst, src[0], src[1]); break; case BRW_OPCODE_BFI2: default_state.access_mode = BRW_ALIGN_16; BFI2(dst, src[0], src[1], src[2]); default_state.access_mode = BRW_ALIGN_1; break; case BRW_OPCODE_IF: IF(BRW_PREDICATE_NORMAL); break; case BRW_OPCODE_ELSE: ELSE(); break; case BRW_OPCODE_ENDIF: ENDIF(); break; case BRW_OPCODE_DO: DO(); break; case BRW_OPCODE_BREAK: BREAK(); break; case BRW_OPCODE_CONTINUE: CONTINUE(); break; case BRW_OPCODE_WHILE: WHILE(); break; case SHADER_OPCODE_RCP: MATH(BRW_MATH_FUNCTION_INV, dst, src[0]); break; case SHADER_OPCODE_RSQ: MATH(BRW_MATH_FUNCTION_RSQ, dst, src[0]); break; case SHADER_OPCODE_SQRT: MATH(BRW_MATH_FUNCTION_SQRT, dst, src[0]); break; case SHADER_OPCODE_EXP2: MATH(BRW_MATH_FUNCTION_EXP, dst, src[0]); break; case SHADER_OPCODE_LOG2: MATH(BRW_MATH_FUNCTION_LOG, dst, src[0]); break; case SHADER_OPCODE_SIN: MATH(BRW_MATH_FUNCTION_SIN, dst, src[0]); break; case SHADER_OPCODE_COS: MATH(BRW_MATH_FUNCTION_COS, dst, src[0]); break; case SHADER_OPCODE_INT_QUOTIENT: MATH(BRW_MATH_FUNCTION_INT_DIV_QUOTIENT, dst, src[0], src[1]); break; case SHADER_OPCODE_INT_REMAINDER: MATH(BRW_MATH_FUNCTION_INT_DIV_REMAINDER, dst, src[0], src[1]); break; case SHADER_OPCODE_POW: MATH(BRW_MATH_FUNCTION_POW, dst, src[0], src[1]); break; case FS_OPCODE_PIXEL_X: case FS_OPCODE_PIXEL_Y: assert(!"FS_OPCODE_PIXEL_X and FS_OPCODE_PIXEL_Y are only for Gen4-5."); break; case FS_OPCODE_CINTERP: MOV(dst, src[0]); break; case FS_OPCODE_LINTERP: generate_linterp(ir, dst, src); 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_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: generate_tex(ir, dst, src[0]); break; case FS_OPCODE_DDX: generate_ddx(ir, dst, src[0]); break; case FS_OPCODE_DDY: /* Make sure fp->UsesDFdy flag got set (otherwise there's no * guarantee that c->key.render_to_fbo is set). */ assert(fp->UsesDFdy); generate_ddy(ir, dst, src[0], c->key.render_to_fbo); break; case SHADER_OPCODE_GEN4_SCRATCH_WRITE: generate_scratch_write(ir, src[0]); break; case SHADER_OPCODE_GEN4_SCRATCH_READ: generate_scratch_read(ir, dst); break; case SHADER_OPCODE_GEN7_SCRATCH_READ: generate_scratch_read_gen7(ir, dst); break; case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD_GEN7: generate_uniform_pull_constant_load(ir, dst, src[0], src[1]); break; case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN7: generate_varying_pull_constant_load(ir, dst, src[0], src[1]); break; case FS_OPCODE_FB_WRITE: generate_fb_write(ir); break; case FS_OPCODE_MOV_DISPATCH_TO_FLAGS: generate_mov_dispatch_to_flags(ir); break; case FS_OPCODE_DISCARD_JUMP: generate_discard_jump(ir); break; case SHADER_OPCODE_SHADER_TIME_ADD: assert(!"XXX: Missing Gen8 scalar support for INTEL_DEBUG=shader_time"); break; case SHADER_OPCODE_UNTYPED_ATOMIC: assert(!"XXX: Missing Gen8 scalar support for untyped atomics"); break; case SHADER_OPCODE_UNTYPED_SURFACE_READ: assert(!"XXX: Missing Gen8 scalar support for untyped surface reads"); break; case FS_OPCODE_SET_SIMD4X2_OFFSET: generate_set_simd4x2_offset(ir, dst, src[0]); break; case FS_OPCODE_SET_OMASK: generate_set_omask(ir, dst, src[0]); break; case FS_OPCODE_SET_SAMPLE_ID: generate_set_sample_id(ir, dst, src[0], src[1]); break; case FS_OPCODE_PACK_HALF_2x16_SPLIT: generate_pack_half_2x16_split(ir, 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(ir, 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. */ patch_discard_jumps_to_fb_writes(); break; default: if (ir->opcode < int(ARRAY_SIZE(opcode_descs))) { _mesa_problem(ctx, "Unsupported opcode `%s' in FS", opcode_descs[ir->opcode].name); } else { _mesa_problem(ctx, "Unsupported opcode %d in FS", ir->opcode); } abort(); } if (unlikely(INTEL_DEBUG & DEBUG_WM)) { disassemble(stderr, last_native_inst_offset, next_inst_offset); foreach_list(node, &cfg->block_list) { bblock_link *link = (bblock_link *)node; bblock_t *block = link->block; if (block->end == ir) { fprintf(stderr, " END B%d", block->block_num); foreach_list(successor_node, &block->children) { bblock_link *successor_link = (bblock_link *)successor_node; bblock_t *successor_block = successor_link->block; fprintf(stderr, " ->B%d", successor_block->block_num); } fprintf(stderr, "\n"); } } } last_native_inst_offset = next_inst_offset; } if (unlikely(INTEL_DEBUG & DEBUG_WM)) { fprintf(stderr, "\n"); } patch_jump_targets(); } const unsigned * gen8_fs_generator::generate_assembly(exec_list *simd8_instructions, exec_list *simd16_instructions, unsigned *assembly_size) { assert(simd8_instructions || simd16_instructions); if (simd8_instructions) { dispatch_width = 8; generate_code(simd8_instructions); } if (simd16_instructions) { /* Align to a 64-byte boundary. */ while ((nr_inst * sizeof(gen8_instruction)) % 64) NOP(); /* Save off the start of this SIMD16 program */ c->prog_data.prog_offset_16 = nr_inst * sizeof(gen8_instruction); dispatch_width = 16; generate_code(simd16_instructions); } *assembly_size = next_inst_offset; return (const unsigned *) store; }