[D3D12] DXBC getGradients and maxa clamp notes
This commit is contained in:
Triang3l
parent
8587438f70
commit
d82fb7d9e6
|
|
@ -4343,6 +4343,10 @@ void DxbcShaderTranslator::ProcessTextureFetchInstruction(
|
|||
}
|
||||
|
||||
if (instr.opcode == FetchOpcode::kTextureFetch) {
|
||||
// Will take sign values and exponent bias from the fetch constant.
|
||||
rdef_constants_used_ |= 1ull
|
||||
<< uint32_t(RdefConstantIndex::kFetchConstants);
|
||||
|
||||
// Apply sign bias (2 * color - 1) and linearize gamma textures. This is
|
||||
// done before applying the exponent bias because this must be done on
|
||||
// color values in 0...1 range, and this is closer to the storage
|
||||
|
|
@ -4622,7 +4626,109 @@ void DxbcShaderTranslator::ProcessTextureFetchInstruction(
|
|||
if (size_and_is_3d_temp != UINT32_MAX) {
|
||||
PopSystemTemp();
|
||||
}
|
||||
|
||||
} else if (instr.opcode == FetchOpcode::kGetTextureGradients) {
|
||||
assert_true(is_pixel_shader());
|
||||
store_result = true;
|
||||
// pv.xz = ddx(coord.xy)
|
||||
shader_code_.push_back(
|
||||
ENCODE_D3D10_SB_OPCODE_TYPE(D3D11_SB_OPCODE_DERIV_RTX_COARSE) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(3 + operand_length));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b0101, 1));
|
||||
shader_code_.push_back(system_temp_pv_);
|
||||
UseDxbcSourceOperand(operand, 0b01010000);
|
||||
++stat_.instruction_count;
|
||||
++stat_.float_instruction_count;
|
||||
// pv.yw = ddy(coord.xy)
|
||||
shader_code_.push_back(
|
||||
ENCODE_D3D10_SB_OPCODE_TYPE(D3D11_SB_OPCODE_DERIV_RTY_COARSE) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(3 + operand_length));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1010, 1));
|
||||
shader_code_.push_back(system_temp_pv_);
|
||||
UseDxbcSourceOperand(operand, 0b01010000);
|
||||
++stat_.instruction_count;
|
||||
++stat_.float_instruction_count;
|
||||
// Get the exponent bias (horizontal in bits 22:26, vertical in bits 27:31
|
||||
// of dword 4 ([1].x or [2].z) of the fetch constant).
|
||||
uint32_t exp_bias_temp = PushSystemTemp();
|
||||
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D11_SB_OPCODE_IBFE) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(17));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b0011, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
|
||||
shader_code_.push_back(5);
|
||||
shader_code_.push_back(5);
|
||||
shader_code_.push_back(0);
|
||||
shader_code_.push_back(0);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
|
||||
shader_code_.push_back(22);
|
||||
shader_code_.push_back(27);
|
||||
shader_code_.push_back(0);
|
||||
shader_code_.push_back(0);
|
||||
rdef_constants_used_ |= 1ull
|
||||
<< uint32_t(RdefConstantIndex::kFetchConstants);
|
||||
shader_code_.push_back(EncodeVectorReplicatedOperand(
|
||||
D3D10_SB_OPERAND_TYPE_CONSTANT_BUFFER, (tfetch_index & 1) * 2, 3));
|
||||
shader_code_.push_back(
|
||||
uint32_t(RdefConstantBufferIndex::kFetchConstants));
|
||||
shader_code_.push_back(uint32_t(CbufferRegister::kFetchConstants));
|
||||
shader_code_.push_back(tfetch_pair_offset + 1 + (tfetch_index & 1));
|
||||
++stat_.instruction_count;
|
||||
++stat_.int_instruction_count;
|
||||
// Shift the exponent bias into float exponent bits.
|
||||
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ISHL) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(10));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b0011, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
|
||||
shader_code_.push_back(23);
|
||||
shader_code_.push_back(23);
|
||||
shader_code_.push_back(0);
|
||||
shader_code_.push_back(0);
|
||||
++stat_.instruction_count;
|
||||
++stat_.int_instruction_count;
|
||||
// Add the bias to the exponent of 1.0.
|
||||
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_IADD) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(10));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b0011, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_IMMEDIATE32, kSwizzleXYZW, 0));
|
||||
shader_code_.push_back(0x3F800000);
|
||||
shader_code_.push_back(0x3F800000);
|
||||
shader_code_.push_back(0);
|
||||
shader_code_.push_back(0);
|
||||
++stat_.instruction_count;
|
||||
++stat_.int_instruction_count;
|
||||
// Apply the exponent bias.
|
||||
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_MUL) |
|
||||
ENCODE_D3D10_SB_TOKENIZED_INSTRUCTION_LENGTH(7));
|
||||
shader_code_.push_back(
|
||||
EncodeVectorMaskedOperand(D3D10_SB_OPERAND_TYPE_TEMP, 0b1111, 1));
|
||||
shader_code_.push_back(system_temp_pv_);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_TEMP, kSwizzleXYZW, 1));
|
||||
shader_code_.push_back(system_temp_pv_);
|
||||
shader_code_.push_back(EncodeVectorSwizzledOperand(
|
||||
D3D10_SB_OPERAND_TYPE_TEMP, 0b01000100, 1));
|
||||
shader_code_.push_back(exp_bias_temp);
|
||||
++stat_.instruction_count;
|
||||
++stat_.float_instruction_count;
|
||||
// Release exp_bias_temp.
|
||||
PopSystemTemp();
|
||||
} else if (instr.opcode == FetchOpcode::kSetTextureLod) {
|
||||
shader_code_.push_back(
|
||||
ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_MOV) |
|
||||
|
|
@ -5465,12 +5571,14 @@ void DxbcShaderTranslator::ProcessVectorAluInstruction(
|
|||
// The `a0 = int(clamp(floor(src0.w + 0.5), -256.0, 255.0))` part.
|
||||
//
|
||||
// Using specifically floor(src0.w + 0.5) rather than round(src0.w)
|
||||
// because the R600 ISA reference says so - this makes a difference at
|
||||
// 0.5 because round rounds to the nearest even.
|
||||
// because the R600 ISA reference and MSDN say so - this makes a
|
||||
// difference at 0.5 because round_ni rounds to the nearest even.
|
||||
// There's one deviation from the R600 specification though - the value is
|
||||
// clamped to 255 rather than set to -256 if it's over 255. We don't know
|
||||
// yet which is the correct - the mova_int description, for example, says
|
||||
// "clamp" explicitly.
|
||||
// "clamp" explicitly. MSDN, however, says the value should actually be
|
||||
// clamped.
|
||||
// http://web.archive.org/web/20100705151335/http://msdn.microsoft.com:80/en-us/library/bb313931.aspx
|
||||
//
|
||||
// pv.x (temporary) = src0.w + 0.5
|
||||
shader_code_.push_back(ENCODE_D3D10_SB_OPCODE_TYPE(D3D10_SB_OPCODE_ADD) |
|
||||
|
|
|
|||
Loading…
Reference in New Issue