diff options
Diffstat (limited to 'src/microsoft/compiler/dxil_nir_lower_vs_vertex_conversion.c')
| -rw-r--r-- | src/microsoft/compiler/dxil_nir_lower_vs_vertex_conversion.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/microsoft/compiler/dxil_nir_lower_vs_vertex_conversion.c b/src/microsoft/compiler/dxil_nir_lower_vs_vertex_conversion.c new file mode 100644 index 00000000000..6c14ae10404 --- /dev/null +++ b/src/microsoft/compiler/dxil_nir_lower_vs_vertex_conversion.c @@ -0,0 +1,161 @@ +/* + * Copyright © Microsoft 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 + * 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 "dxil_nir.h" + +#include "nir_builder.h" +#include "nir_builtin_builder.h" + +static enum pipe_format +get_input_target_format(nir_variable *var, const void *options) +{ + enum pipe_format *target_formats = (enum pipe_format *)options; + return target_formats[var->data.driver_location]; +} + +static bool +lower_vs_vertex_conversion_filter(const nir_instr *instr, const void *options) +{ + if (instr->type != nir_instr_type_intrinsic) + return false; + + nir_intrinsic_instr *inst = nir_instr_as_intrinsic(instr); + if (inst->intrinsic != nir_intrinsic_load_deref) + return false; + + nir_variable *var = nir_intrinsic_get_var(inst, 0); + return (var->data.mode == nir_var_shader_in) && + (get_input_target_format(var, options) != PIPE_FORMAT_NONE); +} + +typedef nir_ssa_def * +(*shift_right_func)(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1); + +/* decoding the signed vs unsigned scaled format is handled + * by applying the signed or unsigned shift right function + * accordingly */ +static nir_ssa_def * +from_10_10_10_2_scaled(nir_builder *b, nir_ssa_def *src, + nir_ssa_def *lshift, shift_right_func shr) +{ + nir_ssa_def *rshift = nir_imm_ivec4(b, 22, 22, 22, 30); + return nir_i2f32(b, shr(b, nir_ishl(b, src, lshift), rshift)); +} + +static nir_ssa_def * +from_10_10_10_2_snorm(nir_builder *b, nir_ssa_def *src, nir_ssa_def *lshift) +{ + nir_ssa_def *split = from_10_10_10_2_scaled(b, src, lshift, nir_ishr); + nir_ssa_def *scale_rgb = nir_imm_vec4(b, + 1.0f / 0x1ff, + 1.0f / 0x1ff, + 1.0f / 0x1ff, + 1.0f); + return nir_fmul(b, split, scale_rgb); +} + +static nir_ssa_def * +from_10_10_10_2_unorm(nir_builder *b, nir_ssa_def *src, nir_ssa_def *lshift) +{ + nir_ssa_def *split = from_10_10_10_2_scaled(b, src, lshift, nir_ushr); + nir_ssa_def *scale_rgb = nir_imm_vec4(b, + 1.0f / 0x3ff, + 1.0f / 0x3ff, + 1.0f / 0x3ff, + 1.0f / 3.0f); + return nir_fmul(b, split, scale_rgb); +} + +inline static nir_ssa_def * +lshift_rgba(nir_builder *b) +{ + return nir_imm_ivec4(b, 22, 12, 2, 0); +} + +inline static nir_ssa_def * +lshift_bgra(nir_builder *b) +{ + return nir_imm_ivec4(b, 2, 12, 22, 0); +} + +static nir_ssa_def * +lower_vs_vertex_conversion_impl(nir_builder *b, nir_instr *instr, void *options) +{ + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); + nir_variable *var = nir_intrinsic_get_var(intr, 0); + enum pipe_format fmt = get_input_target_format(var, options); + + if (!util_format_has_alpha(fmt)) { + /* these formats need the alpha channel replaced with 1: */ + assert(fmt == PIPE_FORMAT_R8G8B8_SINT || + fmt == PIPE_FORMAT_R8G8B8_UINT || + fmt == PIPE_FORMAT_R16G16B16_SINT || + fmt == PIPE_FORMAT_R16G16B16_UINT); + if (intr->dest.ssa.num_components == 3) + return NULL; + return nir_vector_insert_imm(b, &intr->dest.ssa, nir_imm_int(b, 1), 3); + } else { + nir_ssa_def *src = nir_channel(b, &intr->dest.ssa, 0); + + switch (fmt) { + case PIPE_FORMAT_R10G10B10A2_SNORM: + return from_10_10_10_2_snorm(b, src, lshift_rgba(b)); + case PIPE_FORMAT_B10G10R10A2_SNORM: + return from_10_10_10_2_snorm(b, src, lshift_bgra(b)); + case PIPE_FORMAT_B10G10R10A2_UNORM: + return from_10_10_10_2_unorm(b, src, lshift_bgra(b)); + case PIPE_FORMAT_R10G10B10A2_SSCALED: + return from_10_10_10_2_scaled(b, src, lshift_rgba(b), nir_ishr); + case PIPE_FORMAT_B10G10R10A2_SSCALED: + return from_10_10_10_2_scaled(b, src, lshift_bgra(b), nir_ishr); + case PIPE_FORMAT_R10G10B10A2_USCALED: + return from_10_10_10_2_scaled(b, src, lshift_rgba(b), nir_ushr); + case PIPE_FORMAT_B10G10R10A2_USCALED: + return from_10_10_10_2_scaled(b, src, lshift_bgra(b), nir_ushr); + + default: + unreachable("Unsupported emulated vertex format"); + } + } +} + +/* Lower emulated vertex attribute input + * The vertex attributes are passed as R32_UINT that needs to be converted + * to one of the RGB10A2 formats that need to be emulated. + * + * @param target_formats contains the per attribute format to convert to + * or PIPE_FORMAT_NONE if no conversion is needed + */ +bool +dxil_nir_lower_vs_vertex_conversion(nir_shader *s, + enum pipe_format target_formats[]) +{ + assert(s->info.stage == MESA_SHADER_VERTEX); + + bool result = + nir_shader_lower_instructions(s, + lower_vs_vertex_conversion_filter, + lower_vs_vertex_conversion_impl, + target_formats); + return result; +} |