From: Dave Airlie Date: Fri, 17 Jul 2015 03:44:18 +0000 (+0100) Subject: radeonsi: add support for interpolateAt functions (v2) X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=aa25a2c1ba2ea14efdab405707f15dace323cd48;p=mesa.git radeonsi: add support for interpolateAt functions (v2) This is part of ARB_gpu_shader5, and this passes all the piglit tests currently available. v2: use macros from the fine derivs commit. add comments. Reviewed-by: Marek Olšák Signed-off-by: Dave Airlie --- diff --git a/docs/GL3.txt b/docs/GL3.txt index 15bb57f441a..258a6fb94e2 100644 --- a/docs/GL3.txt +++ b/docs/GL3.txt @@ -107,7 +107,7 @@ GL 4.0, GLSL 4.00: - Geometry shader instancing DONE (r600, radeonsi, llvmpipe, softpipe) - Geometry shader multiple streams DONE () - Enhanced per-sample shading DONE (r600, radeonsi) - - Interpolation functions DONE (r600) + - Interpolation functions DONE (r600, radeonsi) - New overload resolution rules DONE GL_ARB_gpu_shader_fp64 DONE (nvc0, radeonsi, llvmpipe, softpipe) GL_ARB_sample_shading DONE (i965, nv50, nvc0, r600, radeonsi) diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 27b3c72d1c9..fa31f734ff2 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -2960,6 +2960,234 @@ static void si_llvm_emit_ddxy( emit_data->output[0] = lp_build_gather_values(gallivm, result, 4); } +/* + * this takes an I,J coordinate pair, + * and works out the X and Y derivatives. + * it returns DDX(I), DDX(J), DDY(I), DDY(J). + */ +static LLVMValueRef si_llvm_emit_ddxy_interp( + struct lp_build_tgsi_context *bld_base, + LLVMValueRef interp_ij) +{ + struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); + struct gallivm_state *gallivm = bld_base->base.gallivm; + struct lp_build_context *base = &bld_base->base; + LLVMValueRef indices[2]; + LLVMValueRef store_ptr, load_ptr_x, load_ptr_y, load_ptr_ddx, load_ptr_ddy, temp, temp2; + LLVMValueRef tl, tr, bl, result[4]; + LLVMTypeRef i32; + unsigned c; + + i32 = LLVMInt32TypeInContext(gallivm->context); + + indices[0] = bld_base->uint_bld.zero; + indices[1] = build_intrinsic(gallivm->builder, "llvm.SI.tid", i32, + NULL, 0, LLVMReadNoneAttribute); + store_ptr = LLVMBuildGEP(gallivm->builder, si_shader_ctx->lds, + indices, 2, ""); + + temp = LLVMBuildAnd(gallivm->builder, indices[1], + lp_build_const_int32(gallivm, TID_MASK_LEFT), ""); + + temp2 = LLVMBuildAnd(gallivm->builder, indices[1], + lp_build_const_int32(gallivm, TID_MASK_TOP), ""); + + indices[1] = temp; + load_ptr_x = LLVMBuildGEP(gallivm->builder, si_shader_ctx->lds, + indices, 2, ""); + + indices[1] = temp2; + load_ptr_y = LLVMBuildGEP(gallivm->builder, si_shader_ctx->lds, + indices, 2, ""); + + indices[1] = LLVMBuildAdd(gallivm->builder, temp, + lp_build_const_int32(gallivm, 1), ""); + load_ptr_ddx = LLVMBuildGEP(gallivm->builder, si_shader_ctx->lds, + indices, 2, ""); + + indices[1] = LLVMBuildAdd(gallivm->builder, temp2, + lp_build_const_int32(gallivm, 2), ""); + load_ptr_ddy = LLVMBuildGEP(gallivm->builder, si_shader_ctx->lds, + indices, 2, ""); + + for (c = 0; c < 2; ++c) { + LLVMValueRef store_val; + LLVMValueRef c_ll = lp_build_const_int32(gallivm, c); + + store_val = LLVMBuildExtractElement(gallivm->builder, + interp_ij, c_ll, ""); + LLVMBuildStore(gallivm->builder, + store_val, + store_ptr); + + tl = LLVMBuildLoad(gallivm->builder, load_ptr_x, ""); + tl = LLVMBuildBitCast(gallivm->builder, tl, base->elem_type, ""); + + tr = LLVMBuildLoad(gallivm->builder, load_ptr_ddx, ""); + tr = LLVMBuildBitCast(gallivm->builder, tr, base->elem_type, ""); + + result[c] = LLVMBuildFSub(gallivm->builder, tr, tl, ""); + + tl = LLVMBuildLoad(gallivm->builder, load_ptr_y, ""); + tl = LLVMBuildBitCast(gallivm->builder, tl, base->elem_type, ""); + + bl = LLVMBuildLoad(gallivm->builder, load_ptr_ddy, ""); + bl = LLVMBuildBitCast(gallivm->builder, bl, base->elem_type, ""); + + result[c + 2] = LLVMBuildFSub(gallivm->builder, bl, tl, ""); + } + + return lp_build_gather_values(gallivm, result, 4); +} + +static void interp_fetch_args( + struct lp_build_tgsi_context *bld_base, + struct lp_build_emit_data *emit_data) +{ + struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); + struct gallivm_state *gallivm = bld_base->base.gallivm; + const struct tgsi_full_instruction *inst = emit_data->inst; + + if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET) { + /* offset is in second src, first two channels */ + emit_data->args[0] = lp_build_emit_fetch(bld_base, + emit_data->inst, 1, + 0); + emit_data->args[1] = lp_build_emit_fetch(bld_base, + emit_data->inst, 1, + 1); + emit_data->arg_count = 2; + } else if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) { + LLVMValueRef sample_position; + LLVMValueRef sample_id; + LLVMValueRef halfval = lp_build_const_float(gallivm, 0.5f); + + /* fetch sample ID, then fetch its sample position, + * and place into first two channels. + */ + sample_id = lp_build_emit_fetch(bld_base, + emit_data->inst, 1, 0); + sample_id = LLVMBuildBitCast(gallivm->builder, sample_id, + LLVMInt32TypeInContext(gallivm->context), + ""); + sample_position = load_sample_position(&si_shader_ctx->radeon_bld, sample_id); + + emit_data->args[0] = LLVMBuildExtractElement(gallivm->builder, + sample_position, + lp_build_const_int32(gallivm, 0), ""); + + emit_data->args[0] = LLVMBuildFSub(gallivm->builder, emit_data->args[0], halfval, ""); + emit_data->args[1] = LLVMBuildExtractElement(gallivm->builder, + sample_position, + lp_build_const_int32(gallivm, 1), ""); + emit_data->args[1] = LLVMBuildFSub(gallivm->builder, emit_data->args[1], halfval, ""); + emit_data->arg_count = 2; + } +} + +static void build_interp_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 *si_shader_ctx = si_shader_context(bld_base); + struct si_shader *shader = si_shader_ctx->shader; + struct gallivm_state *gallivm = bld_base->base.gallivm; + LLVMValueRef interp_param; + const struct tgsi_full_instruction *inst = emit_data->inst; + const char *intr_name; + int input_index; + int chan; + int i; + LLVMValueRef attr_number; + LLVMTypeRef input_type = LLVMFloatTypeInContext(gallivm->context); + LLVMValueRef params = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, SI_PARAM_PRIM_MASK); + int interp_param_idx; + unsigned location; + + assert(inst->Src[0].Register.File == TGSI_FILE_INPUT); + input_index = inst->Src[0].Register.Index; + + if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET || + inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) + location = TGSI_INTERPOLATE_LOC_CENTER; + else + location = TGSI_INTERPOLATE_LOC_CENTROID; + + interp_param_idx = lookup_interp_param_index(shader->ps_input_interpolate[input_index], + location); + if (interp_param_idx == -1) + return; + else if (interp_param_idx) + interp_param = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, interp_param_idx); + else + interp_param = NULL; + + attr_number = lp_build_const_int32(gallivm, + shader->ps_input_param_offset[input_index]); + + if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET || + inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) { + LLVMValueRef ij_out[2]; + LLVMValueRef ddxy_out = si_llvm_emit_ddxy_interp(bld_base, interp_param); + + /* + * take the I then J parameters, and the DDX/Y for it, and + * calculate the IJ inputs for the interpolator. + * temp1 = ddx * offset/sample.x + I; + * interp_param.I = ddy * offset/sample.y + temp1; + * temp1 = ddx * offset/sample.x + J; + * interp_param.J = ddy * offset/sample.y + temp1; + */ + for (i = 0; i < 2; i++) { + LLVMValueRef ix_ll = lp_build_const_int32(gallivm, i); + LLVMValueRef iy_ll = lp_build_const_int32(gallivm, i + 2); + LLVMValueRef ddx_el = LLVMBuildExtractElement(gallivm->builder, + ddxy_out, ix_ll, ""); + LLVMValueRef ddy_el = LLVMBuildExtractElement(gallivm->builder, + ddxy_out, iy_ll, ""); + LLVMValueRef interp_el = LLVMBuildExtractElement(gallivm->builder, + interp_param, ix_ll, ""); + LLVMValueRef temp1, temp2; + + interp_el = LLVMBuildBitCast(gallivm->builder, interp_el, + LLVMFloatTypeInContext(gallivm->context), ""); + + temp1 = LLVMBuildFMul(gallivm->builder, ddx_el, emit_data->args[0], ""); + + temp1 = LLVMBuildFAdd(gallivm->builder, temp1, interp_el, ""); + + temp2 = LLVMBuildFMul(gallivm->builder, ddy_el, emit_data->args[1], ""); + + temp2 = LLVMBuildFAdd(gallivm->builder, temp2, temp1, ""); + + ij_out[i] = LLVMBuildBitCast(gallivm->builder, + temp2, + LLVMIntTypeInContext(gallivm->context, 32), ""); + } + interp_param = lp_build_gather_values(bld_base->base.gallivm, ij_out, 2); + } + + intr_name = interp_param ? "llvm.SI.fs.interp" : "llvm.SI.fs.constant"; + for (chan = 0; chan < 2; chan++) { + LLVMValueRef args[4]; + LLVMValueRef llvm_chan; + unsigned schan; + + schan = tgsi_util_get_full_src_register_swizzle(&inst->Src[0], chan); + llvm_chan = lp_build_const_int32(gallivm, schan); + + args[0] = llvm_chan; + args[1] = attr_number; + args[2] = params; + args[3] = interp_param; + + emit_data->output[chan] = + build_intrinsic(gallivm->builder, intr_name, + input_type, args, args[3] ? 4 : 3, + LLVMReadNoneAttribute | LLVMNoUnwindAttribute); + } +} + /* Emit one vertex from the geometry shader */ static void si_llvm_emit_vertex( const struct lp_build_tgsi_action *action, @@ -3073,6 +3301,11 @@ static const struct lp_build_tgsi_action txq_action = { .intr_name = "llvm.SI.resinfo" }; +static const struct lp_build_tgsi_action interp_action = { + .fetch_args = interp_fetch_args, + .emit = build_interp_intrinsic, +}; + static void create_meta_data(struct si_shader_context *si_shader_ctx) { struct gallivm_state *gallivm = si_shader_ctx->radeon_bld.soa.bld_base.base.gallivm; @@ -3269,7 +3502,9 @@ static void create_function(struct si_shader_context *si_shader_ctx) (bld_base->info->opcode_count[TGSI_OPCODE_DDX] > 0 || bld_base->info->opcode_count[TGSI_OPCODE_DDY] > 0 || bld_base->info->opcode_count[TGSI_OPCODE_DDX_FINE] > 0 || - bld_base->info->opcode_count[TGSI_OPCODE_DDY_FINE] > 0)) + bld_base->info->opcode_count[TGSI_OPCODE_DDY_FINE] > 0 || + bld_base->info->opcode_count[TGSI_OPCODE_INTERP_OFFSET] > 0 || + bld_base->info->opcode_count[TGSI_OPCODE_INTERP_SAMPLE] > 0)) si_shader_ctx->lds = LLVMAddGlobalInAddressSpace(gallivm->module, LLVMArrayType(i32, 64), @@ -3747,6 +3982,10 @@ int si_shader_create(struct si_screen *sscreen, LLVMTargetMachineRef tm, bld_base->info = poly_stipple ? &stipple_shader_info : &sel->info; bld_base->emit_fetch_funcs[TGSI_FILE_CONSTANT] = fetch_constant; + bld_base->op_actions[TGSI_OPCODE_INTERP_CENTROID] = interp_action; + bld_base->op_actions[TGSI_OPCODE_INTERP_SAMPLE] = interp_action; + bld_base->op_actions[TGSI_OPCODE_INTERP_OFFSET] = interp_action; + bld_base->op_actions[TGSI_OPCODE_TEX] = tex_action; bld_base->op_actions[TGSI_OPCODE_TEX2] = tex_action; bld_base->op_actions[TGSI_OPCODE_TXB] = tex_action;