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Pica/VertexShader: Fix a bug in the bitfield definitions and add the "negate" field for swizzlers.

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This commit is contained in:
Tony Wasserka 2014-08-14 23:28:55 +02:00
parent 26ade98411
commit 62c36a4ef0
2 changed files with 92 additions and 14 deletions
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28
src/video_core/vertex_shader.cpp
View file

@ -65,26 +65,32 @@ static void ProcessShaderCode(VertexShaderState& state) {
const Instruction& instr = *(const Instruction*)state.program_counter;
state.debug.max_offset = std::max<u32>(state.debug.max_offset, 1 + (state.program_counter - shader_memory));
const float24* src1_ = (instr.common.src1 < 0x10) ? state.input_register_table[instr.common.src1]
: (instr.common.src1 < 0x20) ? &state.temporary_registers[instr.common.src1-0x10].x
: (instr.common.src1 < 0x80) ? &shader_uniforms.f[instr.common.src1-0x20].x
: nullptr;
const float24* src2_ = (instr.common.src2 < 0x10) ? state.input_register_table[instr.common.src2]
: &state.temporary_registers[instr.common.src2-0x10].x;
// TODO: Unsure about the limit values
float24* dest = (instr.common.dest <= 0x1C) ? state.output_register_table[instr.common.dest]
: (instr.common.dest <= 0x3C) ? nullptr
: (instr.common.dest <= 0x7C) ? &state.temporary_registers[(instr.common.dest-0x40)/4][instr.common.dest%4]
const float24* src1_ = (instr.common.src1 < 0x10) ? state.input_register_table[instr.common.src1.GetIndex()]
: (instr.common.src1 < 0x20) ? &state.temporary_registers[instr.common.src1.GetIndex()].x
: (instr.common.src1 < 0x80) ? &shader_uniforms.f[instr.common.src1.GetIndex()].x
: nullptr;
const float24* src2_ = (instr.common.src2 < 0x10) ? state.input_register_table[instr.common.src2.GetIndex()]
: &state.temporary_registers[instr.common.src2.GetIndex()].x;
float24* dest = (instr.common.dest < 0x08) ? state.output_register_table[4*instr.common.dest.GetIndex()]
: (instr.common.dest < 0x10) ? nullptr
: (instr.common.dest < 0x20) ? &state.temporary_registers[instr.common.dest.GetIndex()][0]
: nullptr;
const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.common.operand_desc_id];
const bool negate_src1 = swizzle.negate;
const float24 src1[4] = {
float24 src1[4] = {
src1_[(int)swizzle.GetSelectorSrc1(0)],
src1_[(int)swizzle.GetSelectorSrc1(1)],
src1_[(int)swizzle.GetSelectorSrc1(2)],
src1_[(int)swizzle.GetSelectorSrc1(3)],
};
if (negate_src1) {
src1[0] = src1[0] * float24::FromFloat32(-1);
src1[1] = src1[1] * float24::FromFloat32(-1);
src1[2] = src1[2] * float24::FromFloat32(-1);
src1[3] = src1[3] * float24::FromFloat32(-1);
}
const float24 src2[4] = {
src2_[(int)swizzle.GetSelectorSrc2(0)],
src2_[(int)swizzle.GetSelectorSrc2(1)],

78
src/video_core/vertex_shader.h
View file

@ -117,9 +117,78 @@ union Instruction {
// while "dest" addresses individual floats.
union {
BitField<0x00, 0x5, u32> operand_desc_id;
BitField<0x07, 0x5, u32> src2;
BitField<0x0c, 0x7, u32> src1;
BitField<0x13, 0x7, u32> dest;
template<class BitFieldType>
struct SourceRegister : BitFieldType {
enum RegisterType {
Input,
Temporary,
FloatUniform
};
RegisterType GetRegisterType() const {
if (BitFieldType::Value() < 0x10)
return Input;
else if (BitFieldType::Value() < 0x20)
return Temporary;
else
return FloatUniform;
}
int GetIndex() const {
if (GetRegisterType() == Input)
return BitFieldType::Value();
else if (GetRegisterType() == Temporary)
return BitFieldType::Value() - 0x10;
else if (GetRegisterType() == FloatUniform)
return BitFieldType::Value() - 0x20;
}
std::string GetRegisterName() const {
std::map<RegisterType, std::string> type = {
{ Input, "i" },
{ Temporary, "t" },
{ FloatUniform, "f" },
};
return type[GetRegisterType()] + std::to_string(GetIndex());
}
};
SourceRegister<BitField<0x07, 0x5, u32>> src2;
SourceRegister<BitField<0x0c, 0x7, u32>> src1;
struct : BitField<0x15, 0x5, u32>
{
enum RegisterType {
Output,
Temporary,
Unknown
};
RegisterType GetRegisterType() const {
if (Value() < 0x8)
return Output;
else if (Value() < 0x10)
return Unknown;
else
return Temporary;
}
int GetIndex() const {
if (GetRegisterType() == Output)
return Value();
else if (GetRegisterType() == Temporary)
return Value() - 0x10;
else
return Value();
}
std::string GetRegisterName() const {
std::map<RegisterType, std::string> type = {
{ Output, "o" },
{ Temporary, "t" },
{ Unknown, "u" }
};
return type[GetRegisterType()] + std::to_string(GetIndex());
}
} dest;
} common;
// Format used for flow control instructions ("if")
@ -128,6 +197,7 @@ union Instruction {
BitField<0x0a, 0xc, u32> offset_words;
} flow_control;
};
static_assert(std::is_standard_layout<Instruction>::value, "Structure is not using standard layout!");
union SwizzlePattern {
u32 hex;
@ -185,6 +255,8 @@ union SwizzlePattern {
// Components of "dest" that should be written to: LSB=dest.w, MSB=dest.x
BitField< 0, 4, u32> dest_mask;
BitField< 4, 1, u32> negate; // negates src1
BitField< 5, 2, Selector> src1_selector_3;
BitField< 7, 2, Selector> src1_selector_2;
BitField< 9, 2, Selector> src1_selector_1;