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[D3D12] ROV: Round unorm/snorm to nearest rather than nearest even

This commit is contained in:
Triang3l 2018-12-28 08:25:41 +03:00
parent 5860a8fdc6
commit 216998eb56
1 changed files with 58 additions and 9 deletions
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67
src/xenia/gpu/dxbc_shader_translator_om.cc
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@ -729,22 +729,28 @@ void DxbcShaderTranslator::CompletePixelShader_DepthTo24Bit(
++stat_.instruction_count;
++stat_.float_instruction_count;
// Round to the nearest integer. This is the correct way of rounding, rounding
// towards zero gives 0xFF instead of 0x100 in clear shaders in, for instance,
// Halo 3.
// Round to the nearest integer - add 0.5 before truncating. This is the
// correct way of rounding for normalized formats, rounding towards zero gives
// 0xFF instead of 0x100 in clear shaders in, for instance, Halo 3.
// https://docs.microsoft.com/en-us/windows/desktop/direct3d10/d3d10-graphics-programming-guide-resources-data-conversion
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ROUND_NE) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(5));
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ADD) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(10));
shader_code_.push_back(
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1111, 1));
shader_code_.push_back(depths_temp);
shader_code_.push_back(
EncodeVectorSwizzledOperand(D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
shader_code_.push_back(depths_temp);
shader_code_.push_back(EncodeVectorSwizzledOperand(
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
shader_code_.push_back(0x3F000000);
shader_code_.push_back(0x3F000000);
shader_code_.push_back(0x3F000000);
shader_code_.push_back(0x3F000000);
++stat_.instruction_count;
++stat_.float_instruction_count;
// Convert to fixed-point.
// Convert to unorm.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_FTOU) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(5));
shader_code_.push_back(
@ -3646,19 +3652,61 @@ void DxbcShaderTranslator::CompletePixelShader_WriteToROV_PackColor(
++stat_.instruction_count;
++stat_.float_instruction_count;
// Convert to fixed-point, rounding to the nearest integer.
// Convert to fixed-point, rounding to the nearest integer (using snorm
// conversion rules because there are no true fixed-point formats with
// separate bits for before and after the point - k_16_16 and k_16_16_16_16
// are exponent-biased snorm formats).
// https://docs.microsoft.com/en-us/windows/desktop/direct3d10/d3d10-graphics-programming-guide-resources-data-conversion
uint32_t fixed_temp = PushSystemTemp();
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ROUND_NE) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(5));
// Extract the signs.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_AND) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(10));
shader_code_.push_back(
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1111, 1));
shader_code_.push_back(fixed_temp);
shader_code_.push_back(
EncodeVectorSwizzledOperand(D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
shader_code_.push_back(source_and_scratch_temp);
shader_code_.push_back(EncodeVectorSwizzledOperand(
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
shader_code_.push_back(0x80000000u);
shader_code_.push_back(0x80000000u);
shader_code_.push_back(0x80000000u);
shader_code_.push_back(0x80000000u);
++stat_.instruction_count;
++stat_.uint_instruction_count;
// Make 0.5 or -0.5 depending on the signs of the values.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_OR) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(10));
shader_code_.push_back(
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1111, 1));
shader_code_.push_back(fixed_temp);
shader_code_.push_back(
EncodeVectorSwizzledOperand(D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
shader_code_.push_back(fixed_temp);
shader_code_.push_back(EncodeVectorSwizzledOperand(
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
shader_code_.push_back(0x3F000000u);
shader_code_.push_back(0x3F000000u);
shader_code_.push_back(0x3F000000u);
shader_code_.push_back(0x3F000000u);
++stat_.instruction_count;
++stat_.uint_instruction_count;
// Add 0.5 or -0.5.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ADD) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(7));
shader_code_.push_back(
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1111, 1));
shader_code_.push_back(fixed_temp);
shader_code_.push_back(
EncodeVectorSwizzledOperand(D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
shader_code_.push_back(source_and_scratch_temp);
shader_code_.push_back(
EncodeVectorSwizzledOperand(D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
shader_code_.push_back(fixed_temp);
++stat_.instruction_count;
++stat_.float_instruction_count;
// Truncate.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_FTOI) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(5));
shader_code_.push_back(
@ -3669,6 +3717,7 @@ void DxbcShaderTranslator::CompletePixelShader_WriteToROV_PackColor(
shader_code_.push_back(fixed_temp);
++stat_.instruction_count;
++stat_.conversion_instruction_count;
// Replace the floating-point value with the fixed-point one if needed.
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_MOVC) |
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(9));
shader_code_.push_back(