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GPU: Handle writes to the CB_DATA method.

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Writing to this method will cause the written value to be stored in the currently-set ConstBuffer plus CB_POS.

This method is usually used to upload uniforms or other shader-visible data.
This commit is contained in:
Subv 2018-03-18 15:19:47 -05:00
parent a64b936cbe
commit 85d820b1b4
2 changed files with 39 additions and 0 deletions
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36
src/video_core/engines/maxwell_3d.cpp
View file

@ -83,6 +83,25 @@ void Maxwell3D::WriteReg(u32 method, u32 value, u32 remaining_params) {
ASSERT_MSG(regs.code_address.CodeAddress() == 0, "Unexpected CODE_ADDRESS register value.");
break;
}
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[0]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[1]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[2]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[3]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[4]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[5]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[6]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[7]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[8]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[9]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[10]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[11]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[12]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[13]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[14]):
case MAXWELL3D_REG_INDEX(const_buffer.cb_data[15]): {
ProcessCBData(value);
break;
}
case MAXWELL3D_REG_INDEX(cb_bind[0].raw_config): {
ProcessCBBind(Regs::ShaderStage::Vertex);
break;
@ -194,5 +213,22 @@ void Maxwell3D::ProcessCBBind(Regs::ShaderStage stage) {
buffer.size = regs.const_buffer.cb_size;
}
void Maxwell3D::ProcessCBData(u32 value) {
// Write the input value to the current const buffer at the current position.
GPUVAddr buffer_address = regs.const_buffer.BufferAddress();
ASSERT(buffer_address != 0);
// Don't allow writing past the end of the buffer.
ASSERT(regs.const_buffer.cb_pos + sizeof(u32) <= regs.const_buffer.cb_size);
VAddr address =
memory_manager.PhysicalToVirtualAddress(buffer_address + regs.const_buffer.cb_pos);
Memory::Write32(address, value);
// Increment the current buffer position.
regs.const_buffer.cb_pos = regs.const_buffer.cb_pos + 4;
}
} // namespace Engines
} // namespace Tegra

3
src/video_core/engines/maxwell_3d.h
View file

@ -218,6 +218,9 @@ private:
/// Handles a write to the QUERY_GET register.
void ProcessQueryGet();
/// Handles a write to the CB_DATA[i] register.
void ProcessCBData(u32 value);
/// Handles a write to the CB_BIND register.
void ProcessCBBind(Regs::ShaderStage stage);