/* * Copyright 2017 Advanced Micro Devices, Inc. * * 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 * on the rights to use, copy, modify, merge, publish, distribute, sub * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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. */ #include "si_shader_internal.h" #include "si_pipe.h" #include "sid.h" #include "gallivm/lp_bld_arit.h" #include "gallivm/lp_bld_gather.h" #include "gallivm/lp_bld_intr.h" #include "tgsi/tgsi_build.h" #include "tgsi/tgsi_parse.h" #include "tgsi/tgsi_util.h" static void build_tex_intrinsic(const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data); static const struct lp_build_tgsi_action tex_action; /** * Given a v8i32 resource descriptor for a buffer, extract the size of the * buffer in number of elements and return it as an i32. */ static LLVMValueRef get_buffer_size( struct lp_build_tgsi_context *bld_base, LLVMValueRef descriptor) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef size = LLVMBuildExtractElement(builder, descriptor, LLVMConstInt(ctx->i32, 2, 0), ""); if (ctx->screen->b.chip_class == VI) { /* On VI, the descriptor contains the size in bytes, * but TXQ must return the size in elements. * The stride is always non-zero for resources using TXQ. */ LLVMValueRef stride = LLVMBuildExtractElement(builder, descriptor, ctx->i32_1, ""); stride = LLVMBuildLShr(builder, stride, LLVMConstInt(ctx->i32, 16, 0), ""); stride = LLVMBuildAnd(builder, stride, LLVMConstInt(ctx->i32, 0x3FFF, 0), ""); size = LLVMBuildUDiv(builder, size, stride, ""); } return size; } static LLVMValueRef shader_buffer_fetch_rsrc(struct si_shader_context *ctx, const struct tgsi_full_src_register *reg) { LLVMValueRef index; if (!reg->Register.Indirect) { index = LLVMConstInt(ctx->i32, reg->Register.Index, false); } else { index = si_get_indirect_index(ctx, ®->Indirect, reg->Register.Index); } return ctx->abi.load_ssbo(&ctx->abi, index, false); } static bool tgsi_is_array_sampler(unsigned target) { return target == TGSI_TEXTURE_1D_ARRAY || target == TGSI_TEXTURE_SHADOW1D_ARRAY || target == TGSI_TEXTURE_2D_ARRAY || target == TGSI_TEXTURE_SHADOW2D_ARRAY || target == TGSI_TEXTURE_CUBE_ARRAY || target == TGSI_TEXTURE_SHADOWCUBE_ARRAY || target == TGSI_TEXTURE_2D_ARRAY_MSAA; } static bool tgsi_is_array_image(unsigned target) { return target == TGSI_TEXTURE_3D || target == TGSI_TEXTURE_CUBE || target == TGSI_TEXTURE_1D_ARRAY || target == TGSI_TEXTURE_2D_ARRAY || target == TGSI_TEXTURE_CUBE_ARRAY || target == TGSI_TEXTURE_2D_ARRAY_MSAA; } /** * Given a 256-bit resource descriptor, force the DCC enable bit to off. * * At least on Tonga, executing image stores on images with DCC enabled and * non-trivial can eventually lead to lockups. This can occur when an * application binds an image as read-only but then uses a shader that writes * to it. The OpenGL spec allows almost arbitrarily bad behavior (including * program termination) in this case, but it doesn't cost much to be a bit * nicer: disabling DCC in the shader still leads to undefined results but * avoids the lockup. */ static LLVMValueRef force_dcc_off(struct si_shader_context *ctx, LLVMValueRef rsrc) { if (ctx->screen->b.chip_class <= CIK) { return rsrc; } else { LLVMBuilderRef builder = ctx->gallivm.builder; LLVMValueRef i32_6 = LLVMConstInt(ctx->i32, 6, 0); LLVMValueRef i32_C = LLVMConstInt(ctx->i32, C_008F28_COMPRESSION_EN, 0); LLVMValueRef tmp; tmp = LLVMBuildExtractElement(builder, rsrc, i32_6, ""); tmp = LLVMBuildAnd(builder, tmp, i32_C, ""); return LLVMBuildInsertElement(builder, rsrc, tmp, i32_6, ""); } } LLVMValueRef si_load_image_desc(struct si_shader_context *ctx, LLVMValueRef list, LLVMValueRef index, enum ac_descriptor_type desc_type, bool dcc_off) { LLVMBuilderRef builder = ctx->gallivm.builder; LLVMValueRef rsrc; if (desc_type == AC_DESC_BUFFER) { index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 2, 0), ""); index = LLVMBuildAdd(builder, index, ctx->i32_1, ""); list = LLVMBuildPointerCast(builder, list, si_const_array(ctx->v4i32, 0), ""); } else { assert(desc_type == AC_DESC_IMAGE); } rsrc = ac_build_indexed_load_const(&ctx->ac, list, index); if (dcc_off) rsrc = force_dcc_off(ctx, rsrc); return rsrc; } /** * Load the resource descriptor for \p image. */ static void image_fetch_rsrc( struct lp_build_tgsi_context *bld_base, const struct tgsi_full_src_register *image, bool is_store, unsigned target, LLVMValueRef *rsrc) { struct si_shader_context *ctx = si_shader_context(bld_base); LLVMValueRef rsrc_ptr = LLVMGetParam(ctx->main_fn, ctx->param_samplers_and_images); LLVMValueRef index; bool dcc_off = is_store; if (!image->Register.Indirect) { const struct tgsi_shader_info *info = bld_base->info; unsigned images_writemask = info->images_store | info->images_atomic; index = LLVMConstInt(ctx->i32, si_get_image_slot(image->Register.Index), 0); if (images_writemask & (1 << image->Register.Index)) dcc_off = true; } else { /* From the GL_ARB_shader_image_load_store extension spec: * * If a shader performs an image load, store, or atomic * operation using an image variable declared as an array, * and if the index used to select an individual element is * negative or greater than or equal to the size of the * array, the results of the operation are undefined but may * not lead to termination. */ index = si_get_bounded_indirect_index(ctx, &image->Indirect, image->Register.Index, ctx->num_images); index = LLVMBuildSub(ctx->gallivm.builder, LLVMConstInt(ctx->i32, SI_NUM_IMAGES - 1, 0), index, ""); } if (image->Register.File != TGSI_FILE_IMAGE) { struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef ptr = lp_build_emit_fetch_src(bld_base, image, TGSI_TYPE_UNSIGNED64, 0); rsrc_ptr = LLVMBuildIntToPtr(builder, ptr, si_const_array(ctx->v8i32, 0), ""); index = LLVMConstInt(ctx->i32, 0, 0); } *rsrc = si_load_image_desc(ctx, rsrc_ptr, index, target == TGSI_TEXTURE_BUFFER ? AC_DESC_BUFFER : AC_DESC_IMAGE, dcc_off); } static LLVMValueRef image_fetch_coords( struct lp_build_tgsi_context *bld_base, const struct tgsi_full_instruction *inst, unsigned src, LLVMValueRef desc) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; unsigned target = inst->Memory.Texture; unsigned num_coords = tgsi_util_get_texture_coord_dim(target); LLVMValueRef coords[4]; LLVMValueRef tmp; int chan; for (chan = 0; chan < num_coords; ++chan) { tmp = lp_build_emit_fetch(bld_base, inst, src, chan); tmp = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); coords[chan] = tmp; } if (ctx->screen->b.chip_class >= GFX9) { /* 1D textures are allocated and used as 2D on GFX9. */ if (target == TGSI_TEXTURE_1D) { coords[1] = ctx->i32_0; num_coords++; } else if (target == TGSI_TEXTURE_1D_ARRAY) { coords[2] = coords[1]; coords[1] = ctx->i32_0; num_coords++; } else if (target == TGSI_TEXTURE_2D) { /* The hw can't bind a slice of a 3D image as a 2D * image, because it ignores BASE_ARRAY if the target * is 3D. The workaround is to read BASE_ARRAY and set * it as the 3rd address operand for all 2D images. */ LLVMValueRef first_layer, const5, mask; const5 = LLVMConstInt(ctx->i32, 5, 0); mask = LLVMConstInt(ctx->i32, S_008F24_BASE_ARRAY(~0), 0); first_layer = LLVMBuildExtractElement(builder, desc, const5, ""); first_layer = LLVMBuildAnd(builder, first_layer, mask, ""); coords[2] = first_layer; num_coords++; } } if (num_coords == 1) return coords[0]; if (num_coords == 3) { /* LLVM has difficulties lowering 3-element vectors. */ coords[3] = bld_base->uint_bld.undef; num_coords = 4; } return lp_build_gather_values(gallivm, coords, num_coords); } /** * Append the extra mode bits that are used by image load and store. */ static void image_append_args( struct si_shader_context *ctx, struct lp_build_emit_data * emit_data, unsigned target, bool atomic, bool force_glc) { const struct tgsi_full_instruction *inst = emit_data->inst; LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0); LLVMValueRef i1true = LLVMConstInt(ctx->i1, 1, 0); LLVMValueRef r128 = i1false; LLVMValueRef da = tgsi_is_array_image(target) ? i1true : i1false; LLVMValueRef glc = force_glc || inst->Memory.Qualifier & (TGSI_MEMORY_COHERENT | TGSI_MEMORY_VOLATILE) ? i1true : i1false; LLVMValueRef slc = i1false; LLVMValueRef lwe = i1false; if (atomic || (HAVE_LLVM <= 0x0309)) { emit_data->args[emit_data->arg_count++] = r128; emit_data->args[emit_data->arg_count++] = da; if (!atomic) { emit_data->args[emit_data->arg_count++] = glc; } emit_data->args[emit_data->arg_count++] = slc; return; } /* HAVE_LLVM >= 0x0400 */ emit_data->args[emit_data->arg_count++] = glc; emit_data->args[emit_data->arg_count++] = slc; emit_data->args[emit_data->arg_count++] = lwe; emit_data->args[emit_data->arg_count++] = da; } /** * Append the resource and indexing arguments for buffer intrinsics. * * \param rsrc the v4i32 buffer resource * \param index index into the buffer (stride-based) * \param offset byte offset into the buffer */ static void buffer_append_args( struct si_shader_context *ctx, struct lp_build_emit_data *emit_data, LLVMValueRef rsrc, LLVMValueRef index, LLVMValueRef offset, bool atomic, bool force_glc) { const struct tgsi_full_instruction *inst = emit_data->inst; LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0); LLVMValueRef i1true = LLVMConstInt(ctx->i1, 1, 0); emit_data->args[emit_data->arg_count++] = rsrc; emit_data->args[emit_data->arg_count++] = index; /* vindex */ emit_data->args[emit_data->arg_count++] = offset; /* voffset */ if (!atomic) { emit_data->args[emit_data->arg_count++] = force_glc || inst->Memory.Qualifier & (TGSI_MEMORY_COHERENT | TGSI_MEMORY_VOLATILE) ? i1true : i1false; /* glc */ } emit_data->args[emit_data->arg_count++] = i1false; /* slc */ } static void load_fetch_args( struct lp_build_tgsi_context * bld_base, struct lp_build_emit_data * emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; const struct tgsi_full_instruction * inst = emit_data->inst; unsigned target = inst->Memory.Texture; LLVMValueRef rsrc; emit_data->dst_type = ctx->v4f32; if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) { LLVMBuilderRef builder = gallivm->builder; LLVMValueRef offset; LLVMValueRef tmp; rsrc = shader_buffer_fetch_rsrc(ctx, &inst->Src[0]); tmp = lp_build_emit_fetch(bld_base, inst, 1, 0); offset = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); buffer_append_args(ctx, emit_data, rsrc, ctx->i32_0, offset, false, false); } else if (inst->Src[0].Register.File == TGSI_FILE_IMAGE || tgsi_is_bindless_image_file(inst->Src[0].Register.File)) { LLVMValueRef coords; image_fetch_rsrc(bld_base, &inst->Src[0], false, target, &rsrc); coords = image_fetch_coords(bld_base, inst, 1, rsrc); if (target == TGSI_TEXTURE_BUFFER) { buffer_append_args(ctx, emit_data, rsrc, coords, ctx->i32_0, false, false); } else { emit_data->args[0] = coords; emit_data->args[1] = rsrc; emit_data->args[2] = LLVMConstInt(ctx->i32, 15, 0); /* dmask */ emit_data->arg_count = 3; image_append_args(ctx, emit_data, target, false, false); } } } static unsigned get_load_intr_attribs(bool can_speculate) { /* READNONE means writes can't affect it, while READONLY means that * writes can affect it. */ return can_speculate && HAVE_LLVM >= 0x0400 ? LP_FUNC_ATTR_READNONE : LP_FUNC_ATTR_READONLY; } static unsigned get_store_intr_attribs(bool writeonly_memory) { return writeonly_memory && HAVE_LLVM >= 0x0400 ? LP_FUNC_ATTR_INACCESSIBLE_MEM_ONLY : LP_FUNC_ATTR_WRITEONLY; } static void load_emit_buffer(struct si_shader_context *ctx, struct lp_build_emit_data *emit_data, bool can_speculate) { const struct tgsi_full_instruction *inst = emit_data->inst; uint writemask = inst->Dst[0].Register.WriteMask; uint count = util_last_bit(writemask); LLVMValueRef *args = emit_data->args; /* Don't use SMEM for shader buffer loads, because LLVM doesn't * select SMEM for SI.load.const with a non-constant offset, and * constant offsets practically don't exist with shader buffers. * * Also, SI.load.const doesn't use inst_offset when it's lowered * to VMEM, so we just end up with more VALU instructions in the end * and no benefit. * * TODO: Remove this line once LLVM can select SMEM with a non-constant * offset, and can derive inst_offset when VMEM is selected. * After that, si_memory_barrier should invalidate sL1 for shader * buffers. */ assert(LLVMConstIntGetZExtValue(args[1]) == 0); /* vindex */ emit_data->output[emit_data->chan] = ac_build_buffer_load(&ctx->ac, args[0], count, NULL, args[2], NULL, 0, LLVMConstIntGetZExtValue(args[3]), LLVMConstIntGetZExtValue(args[4]), can_speculate, false); } static LLVMValueRef get_memory_ptr(struct si_shader_context *ctx, const struct tgsi_full_instruction *inst, LLVMTypeRef type, int arg) { struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef offset, ptr; int addr_space; offset = lp_build_emit_fetch(&ctx->bld_base, inst, arg, 0); offset = LLVMBuildBitCast(builder, offset, ctx->i32, ""); ptr = ctx->shared_memory; ptr = LLVMBuildGEP(builder, ptr, &offset, 1, ""); addr_space = LLVMGetPointerAddressSpace(LLVMTypeOf(ptr)); ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, addr_space), ""); return ptr; } static void load_emit_memory( struct si_shader_context *ctx, struct lp_build_emit_data *emit_data) { const struct tgsi_full_instruction *inst = emit_data->inst; struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; unsigned writemask = inst->Dst[0].Register.WriteMask; LLVMValueRef channels[4], ptr, derived_ptr, index; int chan; ptr = get_memory_ptr(ctx, inst, ctx->f32, 1); for (chan = 0; chan < 4; ++chan) { if (!(writemask & (1 << chan))) { channels[chan] = LLVMGetUndef(ctx->f32); continue; } index = LLVMConstInt(ctx->i32, chan, 0); derived_ptr = LLVMBuildGEP(builder, ptr, &index, 1, ""); channels[chan] = LLVMBuildLoad(builder, derived_ptr, ""); } emit_data->output[emit_data->chan] = lp_build_gather_values(gallivm, channels, 4); } /** * Return true if the memory accessed by a LOAD or STORE instruction is * read-only or write-only, respectively. * * \param shader_buffers_reverse_access_mask * For LOAD, set this to (store | atomic) slot usage in the shader. * For STORE, set this to (load | atomic) slot usage in the shader. * \param images_reverse_access_mask Same as above, but for images. */ static bool is_oneway_access_only(const struct tgsi_full_instruction *inst, const struct tgsi_shader_info *info, unsigned shader_buffers_reverse_access_mask, unsigned images_reverse_access_mask) { /* RESTRICT means NOALIAS. * If there are no writes, we can assume the accessed memory is read-only. * If there are no reads, we can assume the accessed memory is write-only. */ if (inst->Memory.Qualifier & TGSI_MEMORY_RESTRICT) { unsigned reverse_access_mask; if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) { reverse_access_mask = shader_buffers_reverse_access_mask; } else if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) { reverse_access_mask = info->images_buffers & images_reverse_access_mask; } else { reverse_access_mask = ~info->images_buffers & images_reverse_access_mask; } if (inst->Src[0].Register.Indirect) { if (!reverse_access_mask) return true; } else { if (!(reverse_access_mask & (1u << inst->Src[0].Register.Index))) return true; } } /* If there are no buffer writes (for both shader buffers & image * buffers), it implies that buffer memory is read-only. * If there are no buffer reads (for both shader buffers & image * buffers), it implies that buffer memory is write-only. * * Same for the case when there are no writes/reads for non-buffer * images. */ if (inst->Src[0].Register.File == TGSI_FILE_BUFFER || (inst->Memory.Texture == TGSI_TEXTURE_BUFFER && (inst->Src[0].Register.File == TGSI_FILE_IMAGE || tgsi_is_bindless_image_file(inst->Src[0].Register.File)))) { if (!shader_buffers_reverse_access_mask && !(info->images_buffers & images_reverse_access_mask)) return true; } else { if (!(~info->images_buffers & images_reverse_access_mask)) return true; } return false; } static void load_emit( const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; const struct tgsi_shader_info *info = &ctx->shader->selector->info; char intrinsic_name[64]; bool can_speculate = false; if (inst->Src[0].Register.File == TGSI_FILE_MEMORY) { load_emit_memory(ctx, emit_data); return; } if (inst->Memory.Qualifier & TGSI_MEMORY_VOLATILE) si_emit_waitcnt(ctx, VM_CNT); can_speculate = !(inst->Memory.Qualifier & TGSI_MEMORY_VOLATILE) && is_oneway_access_only(inst, info, info->shader_buffers_store | info->shader_buffers_atomic, info->images_store | info->images_atomic); if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) { load_emit_buffer(ctx, emit_data, can_speculate); return; } if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) { emit_data->output[emit_data->chan] = lp_build_intrinsic( builder, "llvm.amdgcn.buffer.load.format.v4f32", emit_data->dst_type, emit_data->args, emit_data->arg_count, get_load_intr_attribs(can_speculate)); } else { ac_get_image_intr_name("llvm.amdgcn.image.load", emit_data->dst_type, /* vdata */ LLVMTypeOf(emit_data->args[0]), /* coords */ LLVMTypeOf(emit_data->args[1]), /* rsrc */ intrinsic_name, sizeof(intrinsic_name)); emit_data->output[emit_data->chan] = lp_build_intrinsic( builder, intrinsic_name, emit_data->dst_type, emit_data->args, emit_data->arg_count, get_load_intr_attribs(can_speculate)); } } static void store_fetch_args( struct lp_build_tgsi_context * bld_base, struct lp_build_emit_data * emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; struct tgsi_full_src_register memory; LLVMValueRef chans[4]; LLVMValueRef data; LLVMValueRef rsrc; unsigned chan; emit_data->dst_type = LLVMVoidTypeInContext(gallivm->context); for (chan = 0; chan < 4; ++chan) { chans[chan] = lp_build_emit_fetch(bld_base, inst, 1, chan); } data = lp_build_gather_values(gallivm, chans, 4); emit_data->args[emit_data->arg_count++] = data; memory = tgsi_full_src_register_from_dst(&inst->Dst[0]); if (inst->Dst[0].Register.File == TGSI_FILE_BUFFER) { LLVMValueRef offset; LLVMValueRef tmp; rsrc = shader_buffer_fetch_rsrc(ctx, &memory); tmp = lp_build_emit_fetch(bld_base, inst, 0, 0); offset = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); buffer_append_args(ctx, emit_data, rsrc, ctx->i32_0, offset, false, false); } else if (inst->Dst[0].Register.File == TGSI_FILE_IMAGE || tgsi_is_bindless_image_file(inst->Dst[0].Register.File)) { unsigned target = inst->Memory.Texture; LLVMValueRef coords; /* 8bit/16bit TC L1 write corruption bug on SI. * All store opcodes not aligned to a dword are affected. * * The only way to get unaligned stores in radeonsi is through * shader images. */ bool force_glc = ctx->screen->b.chip_class == SI; image_fetch_rsrc(bld_base, &memory, true, target, &rsrc); coords = image_fetch_coords(bld_base, inst, 0, rsrc); if (target == TGSI_TEXTURE_BUFFER) { buffer_append_args(ctx, emit_data, rsrc, coords, ctx->i32_0, false, force_glc); } else { emit_data->args[1] = coords; emit_data->args[2] = rsrc; emit_data->args[3] = LLVMConstInt(ctx->i32, 15, 0); /* dmask */ emit_data->arg_count = 4; image_append_args(ctx, emit_data, target, false, force_glc); } } } static void store_emit_buffer( struct si_shader_context *ctx, struct lp_build_emit_data *emit_data, bool writeonly_memory) { const struct tgsi_full_instruction *inst = emit_data->inst; struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef base_data = emit_data->args[0]; LLVMValueRef base_offset = emit_data->args[3]; unsigned writemask = inst->Dst[0].Register.WriteMask; while (writemask) { int start, count; const char *intrinsic_name; LLVMValueRef data; LLVMValueRef offset; LLVMValueRef tmp; u_bit_scan_consecutive_range(&writemask, &start, &count); /* Due to an LLVM limitation, split 3-element writes * into a 2-element and a 1-element write. */ if (count == 3) { writemask |= 1 << (start + 2); count = 2; } if (count == 4) { data = base_data; intrinsic_name = "llvm.amdgcn.buffer.store.v4f32"; } else if (count == 2) { LLVMTypeRef v2f32 = LLVMVectorType(ctx->f32, 2); tmp = LLVMBuildExtractElement( builder, base_data, LLVMConstInt(ctx->i32, start, 0), ""); data = LLVMBuildInsertElement( builder, LLVMGetUndef(v2f32), tmp, ctx->i32_0, ""); tmp = LLVMBuildExtractElement( builder, base_data, LLVMConstInt(ctx->i32, start + 1, 0), ""); data = LLVMBuildInsertElement( builder, data, tmp, ctx->i32_1, ""); intrinsic_name = "llvm.amdgcn.buffer.store.v2f32"; } else { assert(count == 1); data = LLVMBuildExtractElement( builder, base_data, LLVMConstInt(ctx->i32, start, 0), ""); intrinsic_name = "llvm.amdgcn.buffer.store.f32"; } offset = base_offset; if (start != 0) { offset = LLVMBuildAdd( builder, offset, LLVMConstInt(ctx->i32, start * 4, 0), ""); } emit_data->args[0] = data; emit_data->args[3] = offset; lp_build_intrinsic( builder, intrinsic_name, emit_data->dst_type, emit_data->args, emit_data->arg_count, get_store_intr_attribs(writeonly_memory)); } } static void store_emit_memory( struct si_shader_context *ctx, struct lp_build_emit_data *emit_data) { const struct tgsi_full_instruction *inst = emit_data->inst; struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; unsigned writemask = inst->Dst[0].Register.WriteMask; LLVMValueRef ptr, derived_ptr, data, index; int chan; ptr = get_memory_ptr(ctx, inst, ctx->f32, 0); for (chan = 0; chan < 4; ++chan) { if (!(writemask & (1 << chan))) { continue; } data = lp_build_emit_fetch(&ctx->bld_base, inst, 1, chan); index = LLVMConstInt(ctx->i32, chan, 0); derived_ptr = LLVMBuildGEP(builder, ptr, &index, 1, ""); LLVMBuildStore(builder, data, derived_ptr); } } static void store_emit( const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; const struct tgsi_shader_info *info = &ctx->shader->selector->info; unsigned target = inst->Memory.Texture; char intrinsic_name[64]; bool writeonly_memory = false; if (inst->Dst[0].Register.File == TGSI_FILE_MEMORY) { store_emit_memory(ctx, emit_data); return; } if (inst->Memory.Qualifier & TGSI_MEMORY_VOLATILE) si_emit_waitcnt(ctx, VM_CNT); writeonly_memory = is_oneway_access_only(inst, info, info->shader_buffers_load | info->shader_buffers_atomic, info->images_load | info->images_atomic); if (inst->Dst[0].Register.File == TGSI_FILE_BUFFER) { store_emit_buffer(ctx, emit_data, writeonly_memory); return; } if (target == TGSI_TEXTURE_BUFFER) { emit_data->output[emit_data->chan] = lp_build_intrinsic( builder, "llvm.amdgcn.buffer.store.format.v4f32", emit_data->dst_type, emit_data->args, emit_data->arg_count, get_store_intr_attribs(writeonly_memory)); } else { ac_get_image_intr_name("llvm.amdgcn.image.store", LLVMTypeOf(emit_data->args[0]), /* vdata */ LLVMTypeOf(emit_data->args[1]), /* coords */ LLVMTypeOf(emit_data->args[2]), /* rsrc */ intrinsic_name, sizeof(intrinsic_name)); emit_data->output[emit_data->chan] = lp_build_intrinsic( builder, intrinsic_name, emit_data->dst_type, emit_data->args, emit_data->arg_count, get_store_intr_attribs(writeonly_memory)); } } static void atomic_fetch_args( struct lp_build_tgsi_context * bld_base, struct lp_build_emit_data * emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; LLVMValueRef data1, data2; LLVMValueRef rsrc; LLVMValueRef tmp; emit_data->dst_type = ctx->f32; tmp = lp_build_emit_fetch(bld_base, inst, 2, 0); data1 = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) { tmp = lp_build_emit_fetch(bld_base, inst, 3, 0); data2 = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); } /* llvm.amdgcn.image/buffer.atomic.cmpswap reflect the hardware order * of arguments, which is reversed relative to TGSI (and GLSL) */ if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) emit_data->args[emit_data->arg_count++] = data2; emit_data->args[emit_data->arg_count++] = data1; if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) { LLVMValueRef offset; rsrc = shader_buffer_fetch_rsrc(ctx, &inst->Src[0]); tmp = lp_build_emit_fetch(bld_base, inst, 1, 0); offset = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); buffer_append_args(ctx, emit_data, rsrc, ctx->i32_0, offset, true, false); } else if (inst->Src[0].Register.File == TGSI_FILE_IMAGE || tgsi_is_bindless_image_file(inst->Src[0].Register.File)) { unsigned target = inst->Memory.Texture; LLVMValueRef coords; image_fetch_rsrc(bld_base, &inst->Src[0], true, target, &rsrc); coords = image_fetch_coords(bld_base, inst, 1, rsrc); if (target == TGSI_TEXTURE_BUFFER) { buffer_append_args(ctx, emit_data, rsrc, coords, ctx->i32_0, true, false); } else { emit_data->args[emit_data->arg_count++] = coords; emit_data->args[emit_data->arg_count++] = rsrc; image_append_args(ctx, emit_data, target, true, false); } } } static void atomic_emit_memory(struct si_shader_context *ctx, struct lp_build_emit_data *emit_data) { struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; LLVMValueRef ptr, result, arg; ptr = get_memory_ptr(ctx, inst, ctx->i32, 1); arg = lp_build_emit_fetch(&ctx->bld_base, inst, 2, 0); arg = LLVMBuildBitCast(builder, arg, ctx->i32, ""); if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) { LLVMValueRef new_data; new_data = lp_build_emit_fetch(&ctx->bld_base, inst, 3, 0); new_data = LLVMBuildBitCast(builder, new_data, ctx->i32, ""); result = LLVMBuildAtomicCmpXchg(builder, ptr, arg, new_data, LLVMAtomicOrderingSequentiallyConsistent, LLVMAtomicOrderingSequentiallyConsistent, false); result = LLVMBuildExtractValue(builder, result, 0, ""); } else { LLVMAtomicRMWBinOp op; switch(inst->Instruction.Opcode) { case TGSI_OPCODE_ATOMUADD: op = LLVMAtomicRMWBinOpAdd; break; case TGSI_OPCODE_ATOMXCHG: op = LLVMAtomicRMWBinOpXchg; break; case TGSI_OPCODE_ATOMAND: op = LLVMAtomicRMWBinOpAnd; break; case TGSI_OPCODE_ATOMOR: op = LLVMAtomicRMWBinOpOr; break; case TGSI_OPCODE_ATOMXOR: op = LLVMAtomicRMWBinOpXor; break; case TGSI_OPCODE_ATOMUMIN: op = LLVMAtomicRMWBinOpUMin; break; case TGSI_OPCODE_ATOMUMAX: op = LLVMAtomicRMWBinOpUMax; break; case TGSI_OPCODE_ATOMIMIN: op = LLVMAtomicRMWBinOpMin; break; case TGSI_OPCODE_ATOMIMAX: op = LLVMAtomicRMWBinOpMax; break; default: unreachable("unknown atomic opcode"); } result = LLVMBuildAtomicRMW(builder, op, ptr, arg, LLVMAtomicOrderingSequentiallyConsistent, false); } emit_data->output[emit_data->chan] = LLVMBuildBitCast(builder, result, emit_data->dst_type, ""); } static void atomic_emit( const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction * inst = emit_data->inst; char intrinsic_name[40]; LLVMValueRef tmp; if (inst->Src[0].Register.File == TGSI_FILE_MEMORY) { atomic_emit_memory(ctx, emit_data); return; } if (inst->Src[0].Register.File == TGSI_FILE_BUFFER || inst->Memory.Texture == TGSI_TEXTURE_BUFFER) { snprintf(intrinsic_name, sizeof(intrinsic_name), "llvm.amdgcn.buffer.atomic.%s", action->intr_name); } else { LLVMValueRef coords; char coords_type[8]; if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) coords = emit_data->args[2]; else coords = emit_data->args[1]; ac_build_type_name_for_intr(LLVMTypeOf(coords), coords_type, sizeof(coords_type)); snprintf(intrinsic_name, sizeof(intrinsic_name), "llvm.amdgcn.image.atomic.%s.%s", action->intr_name, coords_type); } tmp = lp_build_intrinsic( builder, intrinsic_name, ctx->i32, emit_data->args, emit_data->arg_count, 0); emit_data->output[emit_data->chan] = LLVMBuildBitCast(builder, tmp, ctx->f32, ""); } static void set_tex_fetch_args(struct si_shader_context *ctx, struct lp_build_emit_data *emit_data, unsigned target, LLVMValueRef res_ptr, LLVMValueRef samp_ptr, LLVMValueRef *param, unsigned count, unsigned dmask) { struct gallivm_state *gallivm = &ctx->gallivm; struct ac_image_args args = {}; /* Pad to power of two vector */ while (count < util_next_power_of_two(count)) param[count++] = LLVMGetUndef(ctx->i32); if (count > 1) args.addr = lp_build_gather_values(gallivm, param, count); else args.addr = param[0]; args.resource = res_ptr; args.sampler = samp_ptr; args.dmask = dmask; args.unorm = target == TGSI_TEXTURE_RECT || target == TGSI_TEXTURE_SHADOWRECT; args.da = tgsi_is_array_sampler(target); /* Ugly, but we seem to have no other choice right now. */ STATIC_ASSERT(sizeof(args) <= sizeof(emit_data->args)); memcpy(emit_data->args, &args, sizeof(args)); } static LLVMValueRef fix_resinfo(struct si_shader_context *ctx, unsigned target, LLVMValueRef out) { LLVMBuilderRef builder = ctx->gallivm.builder; /* 1D textures are allocated and used as 2D on GFX9. */ if (ctx->screen->b.chip_class >= GFX9 && (target == TGSI_TEXTURE_1D_ARRAY || target == TGSI_TEXTURE_SHADOW1D_ARRAY)) { LLVMValueRef layers = LLVMBuildExtractElement(builder, out, LLVMConstInt(ctx->i32, 2, 0), ""); out = LLVMBuildInsertElement(builder, out, layers, ctx->i32_1, ""); } /* Divide the number of layers by 6 to get the number of cubes. */ if (target == TGSI_TEXTURE_CUBE_ARRAY || target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) { LLVMValueRef imm2 = LLVMConstInt(ctx->i32, 2, 0); LLVMValueRef z = LLVMBuildExtractElement(builder, out, imm2, ""); z = LLVMBuildSDiv(builder, z, LLVMConstInt(ctx->i32, 6, 0), ""); out = LLVMBuildInsertElement(builder, out, z, imm2, ""); } return out; } static void resq_fetch_args( struct lp_build_tgsi_context * bld_base, struct lp_build_emit_data * emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); const struct tgsi_full_instruction *inst = emit_data->inst; const struct tgsi_full_src_register *reg = &inst->Src[0]; emit_data->dst_type = ctx->v4i32; if (reg->Register.File == TGSI_FILE_BUFFER) { emit_data->args[0] = shader_buffer_fetch_rsrc(ctx, reg); emit_data->arg_count = 1; } else if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) { image_fetch_rsrc(bld_base, reg, false, inst->Memory.Texture, &emit_data->args[0]); emit_data->arg_count = 1; } else { LLVMValueRef res_ptr; unsigned image_target; if (inst->Memory.Texture == TGSI_TEXTURE_3D) image_target = TGSI_TEXTURE_2D_ARRAY; else image_target = inst->Memory.Texture; image_fetch_rsrc(bld_base, reg, false, inst->Memory.Texture, &res_ptr); set_tex_fetch_args(ctx, emit_data, image_target, res_ptr, NULL, &ctx->i32_0, 1, 0xf); } } static void resq_emit( const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; const struct tgsi_full_instruction *inst = emit_data->inst; LLVMValueRef out; if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) { out = LLVMBuildExtractElement(builder, emit_data->args[0], LLVMConstInt(ctx->i32, 2, 0), ""); } else if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) { out = get_buffer_size(bld_base, emit_data->args[0]); } else { struct ac_image_args args; memcpy(&args, emit_data->args, sizeof(args)); /* ugly */ args.opcode = ac_image_get_resinfo; out = ac_build_image_opcode(&ctx->ac, &args); out = fix_resinfo(ctx, inst->Memory.Texture, out); } emit_data->output[emit_data->chan] = out; } /** * Load an image view, fmask view. or sampler state descriptor. */ LLVMValueRef si_load_sampler_desc(struct si_shader_context *ctx, LLVMValueRef list, LLVMValueRef index, enum ac_descriptor_type type) { struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; switch (type) { case AC_DESC_IMAGE: /* The image is at [0:7]. */ index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 2, 0), ""); break; case AC_DESC_BUFFER: /* The buffer is in [4:7]. */ index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 4, 0), ""); index = LLVMBuildAdd(builder, index, ctx->i32_1, ""); list = LLVMBuildPointerCast(builder, list, si_const_array(ctx->v4i32, 0), ""); break; case AC_DESC_FMASK: /* The FMASK is at [8:15]. */ index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 2, 0), ""); index = LLVMBuildAdd(builder, index, ctx->i32_1, ""); break; case AC_DESC_SAMPLER: /* The sampler state is at [12:15]. */ index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 4, 0), ""); index = LLVMBuildAdd(builder, index, LLVMConstInt(ctx->i32, 3, 0), ""); list = LLVMBuildPointerCast(builder, list, si_const_array(ctx->v4i32, 0), ""); break; } return ac_build_indexed_load_const(&ctx->ac, list, index); } /* Disable anisotropic filtering if BASE_LEVEL == LAST_LEVEL. * * SI-CI: * If BASE_LEVEL == LAST_LEVEL, the shader must disable anisotropic * filtering manually. The driver sets img7 to a mask clearing * MAX_ANISO_RATIO if BASE_LEVEL == LAST_LEVEL. The shader must do: * s_and_b32 samp0, samp0, img7 * * VI: * The ANISO_OVERRIDE sampler field enables this fix in TA. */ static LLVMValueRef sici_fix_sampler_aniso(struct si_shader_context *ctx, LLVMValueRef res, LLVMValueRef samp) { LLVMBuilderRef builder = ctx->gallivm.builder; LLVMValueRef img7, samp0; if (ctx->screen->b.chip_class >= VI) return samp; img7 = LLVMBuildExtractElement(builder, res, LLVMConstInt(ctx->i32, 7, 0), ""); samp0 = LLVMBuildExtractElement(builder, samp, ctx->i32_0, ""); samp0 = LLVMBuildAnd(builder, samp0, img7, ""); return LLVMBuildInsertElement(builder, samp, samp0, ctx->i32_0, ""); } static void tex_fetch_ptrs( struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data, LLVMValueRef *res_ptr, LLVMValueRef *samp_ptr, LLVMValueRef *fmask_ptr) { struct si_shader_context *ctx = si_shader_context(bld_base); LLVMValueRef list = LLVMGetParam(ctx->main_fn, ctx->param_samplers_and_images); const struct tgsi_full_instruction *inst = emit_data->inst; const struct tgsi_full_src_register *reg; unsigned target = inst->Texture.Texture; unsigned sampler_src; LLVMValueRef index; sampler_src = emit_data->inst->Instruction.NumSrcRegs - 1; reg = &emit_data->inst->Src[sampler_src]; if (reg->Register.Indirect) { index = si_get_bounded_indirect_index(ctx, ®->Indirect, reg->Register.Index, ctx->num_samplers); index = LLVMBuildAdd(ctx->gallivm.builder, index, LLVMConstInt(ctx->i32, SI_NUM_IMAGES / 2, 0), ""); } else { index = LLVMConstInt(ctx->i32, si_get_sampler_slot(reg->Register.Index), 0); } if (reg->Register.File != TGSI_FILE_SAMPLER) { struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef ptr = lp_build_emit_fetch_src(bld_base, reg, TGSI_TYPE_UNSIGNED64, 0); list = LLVMBuildIntToPtr(builder, ptr, si_const_array(ctx->v8i32, 0), ""); index = LLVMConstInt(ctx->i32, 0, 0); } if (target == TGSI_TEXTURE_BUFFER) *res_ptr = si_load_sampler_desc(ctx, list, index, AC_DESC_BUFFER); else *res_ptr = si_load_sampler_desc(ctx, list, index, AC_DESC_IMAGE); if (samp_ptr) *samp_ptr = NULL; if (fmask_ptr) *fmask_ptr = NULL; if (target == TGSI_TEXTURE_2D_MSAA || target == TGSI_TEXTURE_2D_ARRAY_MSAA) { if (fmask_ptr) *fmask_ptr = si_load_sampler_desc(ctx, list, index, AC_DESC_FMASK); } else if (target != TGSI_TEXTURE_BUFFER) { if (samp_ptr) { *samp_ptr = si_load_sampler_desc(ctx, list, index, AC_DESC_SAMPLER); *samp_ptr = sici_fix_sampler_aniso(ctx, *res_ptr, *samp_ptr); } } } static void txq_fetch_args( struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); const struct tgsi_full_instruction *inst = emit_data->inst; unsigned target = inst->Texture.Texture; LLVMValueRef res_ptr; LLVMValueRef address; tex_fetch_ptrs(bld_base, emit_data, &res_ptr, NULL, NULL); if (target == TGSI_TEXTURE_BUFFER) { /* Read the size from the buffer descriptor directly. */ emit_data->args[0] = get_buffer_size(bld_base, res_ptr); return; } /* Textures - set the mip level. */ address = lp_build_emit_fetch(bld_base, inst, 0, TGSI_CHAN_X); set_tex_fetch_args(ctx, emit_data, target, res_ptr, NULL, &address, 1, 0xf); } static void txq_emit(const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct ac_image_args args; unsigned target = emit_data->inst->Texture.Texture; if (target == TGSI_TEXTURE_BUFFER) { /* Just return the buffer size. */ emit_data->output[emit_data->chan] = emit_data->args[0]; return; } memcpy(&args, emit_data->args, sizeof(args)); /* ugly */ args.opcode = ac_image_get_resinfo; LLVMValueRef result = ac_build_image_opcode(&ctx->ac, &args); emit_data->output[emit_data->chan] = fix_resinfo(ctx, target, result); } static void tex_fetch_args( struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; const struct tgsi_full_instruction *inst = emit_data->inst; unsigned opcode = inst->Instruction.Opcode; unsigned target = inst->Texture.Texture; LLVMValueRef coords[5], derivs[6]; LLVMValueRef address[16]; unsigned num_coords = tgsi_util_get_texture_coord_dim(target); int ref_pos = tgsi_util_get_shadow_ref_src_index(target); unsigned count = 0; unsigned chan; unsigned num_deriv_channels = 0; bool has_offset = inst->Texture.NumOffsets > 0; LLVMValueRef res_ptr, samp_ptr, fmask_ptr = NULL; unsigned dmask = 0xf; tex_fetch_ptrs(bld_base, emit_data, &res_ptr, &samp_ptr, &fmask_ptr); if (target == TGSI_TEXTURE_BUFFER) { emit_data->dst_type = ctx->v4f32; emit_data->args[0] = res_ptr; emit_data->args[1] = ctx->i32_0; emit_data->args[2] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_X); emit_data->arg_count = 3; return; } /* Fetch and project texture coordinates */ coords[3] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_W); for (chan = 0; chan < 3; chan++ ) { coords[chan] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, chan); if (opcode == TGSI_OPCODE_TXP) coords[chan] = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_DIV, coords[chan], coords[3]); } if (opcode == TGSI_OPCODE_TXP) coords[3] = bld_base->base.one; /* Pack offsets. */ if (has_offset && opcode != TGSI_OPCODE_TXF && opcode != TGSI_OPCODE_TXF_LZ) { /* The offsets are six-bit signed integers packed like this: * X=[5:0], Y=[13:8], and Z=[21:16]. */ LLVMValueRef offset[3], pack; assert(inst->Texture.NumOffsets == 1); for (chan = 0; chan < 3; chan++) { offset[chan] = lp_build_emit_fetch_texoffset(bld_base, emit_data->inst, 0, chan); offset[chan] = LLVMBuildAnd(gallivm->builder, offset[chan], LLVMConstInt(ctx->i32, 0x3f, 0), ""); if (chan) offset[chan] = LLVMBuildShl(gallivm->builder, offset[chan], LLVMConstInt(ctx->i32, chan*8, 0), ""); } pack = LLVMBuildOr(gallivm->builder, offset[0], offset[1], ""); pack = LLVMBuildOr(gallivm->builder, pack, offset[2], ""); address[count++] = pack; } /* Pack LOD bias value */ if (opcode == TGSI_OPCODE_TXB) address[count++] = coords[3]; if (opcode == TGSI_OPCODE_TXB2) address[count++] = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X); /* Pack depth comparison value */ if (tgsi_is_shadow_target(target) && opcode != TGSI_OPCODE_LODQ) { LLVMValueRef z; if (target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) { z = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X); } else { assert(ref_pos >= 0); z = coords[ref_pos]; } /* TC-compatible HTILE promotes Z16 and Z24 to Z32_FLOAT, * so the depth comparison value isn't clamped for Z16 and * Z24 anymore. Do it manually here. * * It's unnecessary if the original texture format was * Z32_FLOAT, but we don't know that here. */ if (ctx->screen->b.chip_class >= VI) z = ac_build_clamp(&ctx->ac, z); address[count++] = z; } /* Pack user derivatives */ if (opcode == TGSI_OPCODE_TXD) { int param, num_src_deriv_channels, num_dst_deriv_channels; switch (target) { case TGSI_TEXTURE_3D: num_src_deriv_channels = 3; num_dst_deriv_channels = 3; num_deriv_channels = 3; break; case TGSI_TEXTURE_2D: case TGSI_TEXTURE_SHADOW2D: case TGSI_TEXTURE_RECT: case TGSI_TEXTURE_SHADOWRECT: case TGSI_TEXTURE_2D_ARRAY: case TGSI_TEXTURE_SHADOW2D_ARRAY: num_src_deriv_channels = 2; num_dst_deriv_channels = 2; num_deriv_channels = 2; break; case TGSI_TEXTURE_CUBE: case TGSI_TEXTURE_SHADOWCUBE: case TGSI_TEXTURE_CUBE_ARRAY: case TGSI_TEXTURE_SHADOWCUBE_ARRAY: /* Cube derivatives will be converted to 2D. */ num_src_deriv_channels = 3; num_dst_deriv_channels = 3; num_deriv_channels = 2; break; case TGSI_TEXTURE_1D: case TGSI_TEXTURE_SHADOW1D: case TGSI_TEXTURE_1D_ARRAY: case TGSI_TEXTURE_SHADOW1D_ARRAY: num_src_deriv_channels = 1; /* 1D textures are allocated and used as 2D on GFX9. */ if (ctx->screen->b.chip_class >= GFX9) { num_dst_deriv_channels = 2; num_deriv_channels = 2; } else { num_dst_deriv_channels = 1; num_deriv_channels = 1; } break; default: unreachable("invalid target"); } for (param = 0; param < 2; param++) { for (chan = 0; chan < num_src_deriv_channels; chan++) derivs[param * num_dst_deriv_channels + chan] = lp_build_emit_fetch(bld_base, inst, param+1, chan); /* Fill in the rest with zeros. */ for (chan = num_src_deriv_channels; chan < num_dst_deriv_channels; chan++) derivs[param * num_dst_deriv_channels + chan] = bld_base->base.zero; } } if (target == TGSI_TEXTURE_CUBE || target == TGSI_TEXTURE_CUBE_ARRAY || target == TGSI_TEXTURE_SHADOWCUBE || target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) ac_prepare_cube_coords(&ctx->ac, opcode == TGSI_OPCODE_TXD, target == TGSI_TEXTURE_CUBE_ARRAY || target == TGSI_TEXTURE_SHADOWCUBE_ARRAY, coords, derivs); if (opcode == TGSI_OPCODE_TXD) for (int i = 0; i < num_deriv_channels * 2; i++) address[count++] = derivs[i]; /* Pack texture coordinates */ address[count++] = coords[0]; if (num_coords > 1) address[count++] = coords[1]; if (num_coords > 2) address[count++] = coords[2]; /* 1D textures are allocated and used as 2D on GFX9. */ if (ctx->screen->b.chip_class >= GFX9) { LLVMValueRef filler; /* Use 0.5, so that we don't sample the border color. */ if (opcode == TGSI_OPCODE_TXF || opcode == TGSI_OPCODE_TXF_LZ) filler = ctx->i32_0; else filler = LLVMConstReal(ctx->f32, 0.5); if (target == TGSI_TEXTURE_1D || target == TGSI_TEXTURE_SHADOW1D) { address[count++] = filler; } else if (target == TGSI_TEXTURE_1D_ARRAY || target == TGSI_TEXTURE_SHADOW1D_ARRAY) { address[count] = address[count - 1]; address[count - 1] = filler; count++; } } /* Pack LOD or sample index */ if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXF) address[count++] = coords[3]; else if (opcode == TGSI_OPCODE_TXL2) address[count++] = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X); if (count > 16) { assert(!"Cannot handle more than 16 texture address parameters"); count = 16; } for (chan = 0; chan < count; chan++ ) { address[chan] = LLVMBuildBitCast(gallivm->builder, address[chan], ctx->i32, ""); } /* Adjust the sample index according to FMASK. * * For uncompressed MSAA surfaces, FMASK should return 0x76543210, * which is the identity mapping. Each nibble says which physical sample * should be fetched to get that sample. * * For example, 0x11111100 means there are only 2 samples stored and * the second sample covers 3/4 of the pixel. When reading samples 0 * and 1, return physical sample 0 (determined by the first two 0s * in FMASK), otherwise return physical sample 1. * * The sample index should be adjusted as follows: * sample_index = (fmask >> (sample_index * 4)) & 0xF; */ if (target == TGSI_TEXTURE_2D_MSAA || target == TGSI_TEXTURE_2D_ARRAY_MSAA) { struct lp_build_emit_data txf_emit_data = *emit_data; LLVMValueRef txf_address[4]; /* We only need .xy for non-arrays, and .xyz for arrays. */ unsigned txf_count = target == TGSI_TEXTURE_2D_MSAA ? 2 : 3; struct tgsi_full_instruction inst = {}; memcpy(txf_address, address, sizeof(txf_address)); /* Read FMASK using TXF_LZ. */ inst.Instruction.Opcode = TGSI_OPCODE_TXF_LZ; inst.Texture.Texture = target; txf_emit_data.inst = &inst; txf_emit_data.chan = 0; set_tex_fetch_args(ctx, &txf_emit_data, target, fmask_ptr, NULL, txf_address, txf_count, 0xf); build_tex_intrinsic(&tex_action, bld_base, &txf_emit_data); /* Initialize some constants. */ LLVMValueRef four = LLVMConstInt(ctx->i32, 4, 0); LLVMValueRef F = LLVMConstInt(ctx->i32, 0xF, 0); /* Apply the formula. */ LLVMValueRef fmask = LLVMBuildExtractElement(gallivm->builder, txf_emit_data.output[0], ctx->i32_0, ""); unsigned sample_chan = txf_count; /* the sample index is last */ LLVMValueRef sample_index4 = LLVMBuildMul(gallivm->builder, address[sample_chan], four, ""); LLVMValueRef shifted_fmask = LLVMBuildLShr(gallivm->builder, fmask, sample_index4, ""); LLVMValueRef final_sample = LLVMBuildAnd(gallivm->builder, shifted_fmask, F, ""); /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK * resource descriptor is 0 (invalid), */ LLVMValueRef fmask_desc = LLVMBuildBitCast(gallivm->builder, fmask_ptr, ctx->v8i32, ""); LLVMValueRef fmask_word1 = LLVMBuildExtractElement(gallivm->builder, fmask_desc, ctx->i32_1, ""); LLVMValueRef word1_is_nonzero = LLVMBuildICmp(gallivm->builder, LLVMIntNE, fmask_word1, ctx->i32_0, ""); /* Replace the MSAA sample index. */ address[sample_chan] = LLVMBuildSelect(gallivm->builder, word1_is_nonzero, final_sample, address[sample_chan], ""); } if (opcode == TGSI_OPCODE_TXF || opcode == TGSI_OPCODE_TXF_LZ) { /* add tex offsets */ if (inst->Texture.NumOffsets) { struct lp_build_context *uint_bld = &bld_base->uint_bld; const struct tgsi_texture_offset *off = inst->TexOffsets; assert(inst->Texture.NumOffsets == 1); switch (target) { case TGSI_TEXTURE_3D: address[2] = lp_build_add(uint_bld, address[2], ctx->imms[off->Index * TGSI_NUM_CHANNELS + off->SwizzleZ]); /* fall through */ case TGSI_TEXTURE_2D: case TGSI_TEXTURE_SHADOW2D: case TGSI_TEXTURE_RECT: case TGSI_TEXTURE_SHADOWRECT: case TGSI_TEXTURE_2D_ARRAY: case TGSI_TEXTURE_SHADOW2D_ARRAY: address[1] = lp_build_add(uint_bld, address[1], ctx->imms[off->Index * TGSI_NUM_CHANNELS + off->SwizzleY]); /* fall through */ case TGSI_TEXTURE_1D: case TGSI_TEXTURE_SHADOW1D: case TGSI_TEXTURE_1D_ARRAY: case TGSI_TEXTURE_SHADOW1D_ARRAY: address[0] = lp_build_add(uint_bld, address[0], ctx->imms[off->Index * TGSI_NUM_CHANNELS + off->SwizzleX]); break; /* texture offsets do not apply to other texture targets */ } } } if (opcode == TGSI_OPCODE_TG4) { unsigned gather_comp = 0; /* DMASK was repurposed for GATHER4. 4 components are always * returned and DMASK works like a swizzle - it selects * the component to fetch. The only valid DMASK values are * 1=red, 2=green, 4=blue, 8=alpha. (e.g. 1 returns * (red,red,red,red) etc.) The ISA document doesn't mention * this. */ /* Get the component index from src1.x for Gather4. */ if (!tgsi_is_shadow_target(target)) { LLVMValueRef comp_imm; struct tgsi_src_register src1 = inst->Src[1].Register; assert(src1.File == TGSI_FILE_IMMEDIATE); comp_imm = ctx->imms[src1.Index * TGSI_NUM_CHANNELS + src1.SwizzleX]; gather_comp = LLVMConstIntGetZExtValue(comp_imm); gather_comp = CLAMP(gather_comp, 0, 3); } dmask = 1 << gather_comp; } set_tex_fetch_args(ctx, emit_data, target, res_ptr, samp_ptr, address, count, dmask); } /* Gather4 should follow the same rules as bilinear filtering, but the hardware * incorrectly forces nearest filtering if the texture format is integer. * The only effect it has on Gather4, which always returns 4 texels for * bilinear filtering, is that the final coordinates are off by 0.5 of * the texel size. * * The workaround is to subtract 0.5 from the unnormalized coordinates, * or (0.5 / size) from the normalized coordinates. */ static void si_lower_gather4_integer(struct si_shader_context *ctx, struct ac_image_args *args, unsigned target) { LLVMBuilderRef builder = ctx->gallivm.builder; LLVMValueRef coord = args->addr; LLVMValueRef half_texel[2]; /* Texture coordinates start after: * {offset, bias, z-compare, derivatives} * Only the offset and z-compare can occur here. */ unsigned coord_vgpr_index = (int)args->offset + (int)args->compare; int c; if (target == TGSI_TEXTURE_RECT || target == TGSI_TEXTURE_SHADOWRECT) { half_texel[0] = half_texel[1] = LLVMConstReal(ctx->f32, -0.5); } else { struct tgsi_full_instruction txq_inst = {}; struct lp_build_emit_data txq_emit_data = {}; /* Query the texture size. */ txq_inst.Texture.Texture = target; txq_emit_data.inst = &txq_inst; txq_emit_data.dst_type = ctx->v4i32; set_tex_fetch_args(ctx, &txq_emit_data, target, args->resource, NULL, &ctx->i32_0, 1, 0xf); txq_emit(NULL, &ctx->bld_base, &txq_emit_data); /* Compute -0.5 / size. */ for (c = 0; c < 2; c++) { half_texel[c] = LLVMBuildExtractElement(builder, txq_emit_data.output[0], LLVMConstInt(ctx->i32, c, 0), ""); half_texel[c] = LLVMBuildUIToFP(builder, half_texel[c], ctx->f32, ""); half_texel[c] = lp_build_emit_llvm_unary(&ctx->bld_base, TGSI_OPCODE_RCP, half_texel[c]); half_texel[c] = LLVMBuildFMul(builder, half_texel[c], LLVMConstReal(ctx->f32, -0.5), ""); } } for (c = 0; c < 2; c++) { LLVMValueRef tmp; LLVMValueRef index = LLVMConstInt(ctx->i32, coord_vgpr_index + c, 0); tmp = LLVMBuildExtractElement(builder, coord, index, ""); tmp = LLVMBuildBitCast(builder, tmp, ctx->f32, ""); tmp = LLVMBuildFAdd(builder, tmp, half_texel[c], ""); tmp = LLVMBuildBitCast(builder, tmp, ctx->i32, ""); coord = LLVMBuildInsertElement(builder, coord, tmp, index, ""); } args->addr = coord; } static void build_tex_intrinsic(const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); const struct tgsi_full_instruction *inst = emit_data->inst; struct ac_image_args args; unsigned opcode = inst->Instruction.Opcode; unsigned target = inst->Texture.Texture; if (target == TGSI_TEXTURE_BUFFER) { emit_data->output[emit_data->chan] = ac_build_buffer_load_format(&ctx->ac, emit_data->args[0], emit_data->args[2], emit_data->args[1], true); return; } memcpy(&args, emit_data->args, sizeof(args)); /* ugly */ args.opcode = ac_image_sample; args.compare = tgsi_is_shadow_target(target); args.offset = inst->Texture.NumOffsets > 0; switch (opcode) { case TGSI_OPCODE_TXF: case TGSI_OPCODE_TXF_LZ: args.opcode = opcode == TGSI_OPCODE_TXF_LZ || target == TGSI_TEXTURE_2D_MSAA || target == TGSI_TEXTURE_2D_ARRAY_MSAA ? ac_image_load : ac_image_load_mip; args.compare = false; args.offset = false; break; case TGSI_OPCODE_LODQ: args.opcode = ac_image_get_lod; args.compare = false; args.offset = false; break; case TGSI_OPCODE_TEX: case TGSI_OPCODE_TEX2: case TGSI_OPCODE_TXP: if (ctx->type != PIPE_SHADER_FRAGMENT) args.level_zero = true; break; case TGSI_OPCODE_TEX_LZ: args.level_zero = true; break; case TGSI_OPCODE_TXB: case TGSI_OPCODE_TXB2: assert(ctx->type == PIPE_SHADER_FRAGMENT); args.bias = true; break; case TGSI_OPCODE_TXL: case TGSI_OPCODE_TXL2: args.lod = true; break; case TGSI_OPCODE_TXD: args.deriv = true; break; case TGSI_OPCODE_TG4: args.opcode = ac_image_gather4; args.level_zero = true; break; default: assert(0); return; } /* The hardware needs special lowering for Gather4 with integer formats. */ if (ctx->screen->b.chip_class <= VI && opcode == TGSI_OPCODE_TG4) { assert(inst->Texture.ReturnType != TGSI_RETURN_TYPE_UNKNOWN); if (inst->Texture.ReturnType == TGSI_RETURN_TYPE_SINT || inst->Texture.ReturnType == TGSI_RETURN_TYPE_UINT) si_lower_gather4_integer(ctx, &args, target); } emit_data->output[emit_data->chan] = ac_build_image_opcode(&ctx->ac, &args); } static void si_llvm_emit_txqs( const struct lp_build_tgsi_action *action, struct lp_build_tgsi_context *bld_base, struct lp_build_emit_data *emit_data) { struct si_shader_context *ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = &ctx->gallivm; LLVMBuilderRef builder = gallivm->builder; LLVMValueRef res, samples; LLVMValueRef res_ptr, samp_ptr, fmask_ptr = NULL; tex_fetch_ptrs(bld_base, emit_data, &res_ptr, &samp_ptr, &fmask_ptr); /* Read the samples from the descriptor directly. */ res = LLVMBuildBitCast(builder, res_ptr, ctx->v8i32, ""); samples = LLVMBuildExtractElement( builder, res, LLVMConstInt(ctx->i32, 3, 0), ""); samples = LLVMBuildLShr(builder, samples, LLVMConstInt(ctx->i32, 16, 0), ""); samples = LLVMBuildAnd(builder, samples, LLVMConstInt(ctx->i32, 0xf, 0), ""); samples = LLVMBuildShl(builder, ctx->i32_1, samples, ""); emit_data->output[emit_data->chan] = samples; } static const struct lp_build_tgsi_action tex_action = { .fetch_args = tex_fetch_args, .emit = build_tex_intrinsic, }; /** * Setup actions for TGSI memory opcode, including texture opcodes. */ void si_shader_context_init_mem(struct si_shader_context *ctx) { struct lp_build_tgsi_context *bld_base; struct lp_build_tgsi_action tmpl = {}; bld_base = &ctx->bld_base; bld_base->op_actions[TGSI_OPCODE_TEX] = tex_action; bld_base->op_actions[TGSI_OPCODE_TEX_LZ] = tex_action; bld_base->op_actions[TGSI_OPCODE_TEX2] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXB] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXB2] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXD] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXF] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXF_LZ] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXL] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXL2] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXP] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXQ].fetch_args = txq_fetch_args; bld_base->op_actions[TGSI_OPCODE_TXQ].emit = txq_emit; bld_base->op_actions[TGSI_OPCODE_TG4] = tex_action; bld_base->op_actions[TGSI_OPCODE_LODQ] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXQS].emit = si_llvm_emit_txqs; bld_base->op_actions[TGSI_OPCODE_LOAD].fetch_args = load_fetch_args; bld_base->op_actions[TGSI_OPCODE_LOAD].emit = load_emit; bld_base->op_actions[TGSI_OPCODE_STORE].fetch_args = store_fetch_args; bld_base->op_actions[TGSI_OPCODE_STORE].emit = store_emit; bld_base->op_actions[TGSI_OPCODE_RESQ].fetch_args = resq_fetch_args; bld_base->op_actions[TGSI_OPCODE_RESQ].emit = resq_emit; tmpl.fetch_args = atomic_fetch_args; tmpl.emit = atomic_emit; bld_base->op_actions[TGSI_OPCODE_ATOMUADD] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMUADD].intr_name = "add"; bld_base->op_actions[TGSI_OPCODE_ATOMXCHG] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMXCHG].intr_name = "swap"; bld_base->op_actions[TGSI_OPCODE_ATOMCAS] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMCAS].intr_name = "cmpswap"; bld_base->op_actions[TGSI_OPCODE_ATOMAND] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMAND].intr_name = "and"; bld_base->op_actions[TGSI_OPCODE_ATOMOR] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMOR].intr_name = "or"; bld_base->op_actions[TGSI_OPCODE_ATOMXOR] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMXOR].intr_name = "xor"; bld_base->op_actions[TGSI_OPCODE_ATOMUMIN] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMUMIN].intr_name = "umin"; bld_base->op_actions[TGSI_OPCODE_ATOMUMAX] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMUMAX].intr_name = "umax"; bld_base->op_actions[TGSI_OPCODE_ATOMIMIN] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMIMIN].intr_name = "smin"; bld_base->op_actions[TGSI_OPCODE_ATOMIMAX] = tmpl; bld_base->op_actions[TGSI_OPCODE_ATOMIMAX].intr_name = "smax"; }