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dolphin/Source/Core/VideoCommon/VertexLoaderARM64.cpp
Pokechu22 a3951dc2d7 Fix out of bounds accesses for invalid vertex component formats 
On all platforms, this would result in out of bounds accesses when getting the component sizes (which uses stuff from VertexLoader_Position.h/VertexLoader_TextCoord.h/VertexLoader_Normal.h). On platforms other than x64 and ARM64, this would also be out of bounds accesses when getting function pointers for the non-JIT vertex loader (in VertexLoader_Position.cpp etc.). Usually both of these would get data from other entries in the same multi-dimensional array, but the last few entries would be truly out of bounds. This does mean that an out of bounds function pointer can be called on platforms that don't have a JIT vertex loader, but it is limited to invalid component formats with values 5/6/7 due to the size of the bitfield the formats come from, so it seems unlikely that this could be exploited in practice.

This issue affects a few games; Def Jam: Fight for New York (https://bugs.dolphin-emu.org/issues/12719) and Fifa Street are known to be affected.

I have not done any hardware testing for this PR specifically, though I *think* I previously determined that at least a value of 5 behaves the same as float (4). That's what I implemented in any case. I did previously determine that both Def Jam: Fight for New York and Fifa Street use an invalid normal format, but don't actually have lighting enabled when that normal vector is used, so it doesn't change rendering in practice.

The color component format also has two invalid values, but VertexLoader_Color.h/.cpp do check for those invalid ones and return a default value instead of doing an out of bounds access.
2024-04-04 12:50:34 -07:00

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// Copyright 2015 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/VertexLoaderARM64.h"
#include <array>
#include "Common/CommonTypes.h"
#include "VideoCommon/CPMemory.h"
#include "VideoCommon/VertexLoaderManager.h"
using namespace Arm64Gen;
constexpr ARM64Reg src_reg = ARM64Reg::X0;
constexpr ARM64Reg dst_reg = ARM64Reg::X1;
constexpr ARM64Reg remaining_reg = ARM64Reg::W2;
constexpr ARM64Reg skipped_reg = ARM64Reg::W17;
constexpr ARM64Reg scratch1_reg = ARM64Reg::W16;
constexpr ARM64Reg scratch2_reg = ARM64Reg::W15;
constexpr ARM64Reg scratch3_reg = ARM64Reg::W14;
constexpr ARM64Reg saved_count = ARM64Reg::W12;
constexpr ARM64Reg stride_reg = ARM64Reg::X11;
constexpr ARM64Reg arraybase_reg = ARM64Reg::X10;
constexpr ARM64Reg scale_reg = ARM64Reg::X9;
static constexpr int GetLoadSize(int load_bytes)
{
if (load_bytes == 1)
return 1;
else if (load_bytes <= 2)
return 2;
else if (load_bytes <= 4)
return 4;
else if (load_bytes <= 8)
return 8;
else
return 16;
}
alignas(16) static const float scale_factors[] = {
1.0 / (1ULL << 0), 1.0 / (1ULL << 1), 1.0 / (1ULL << 2), 1.0 / (1ULL << 3),
1.0 / (1ULL << 4), 1.0 / (1ULL << 5), 1.0 / (1ULL << 6), 1.0 / (1ULL << 7),
1.0 / (1ULL << 8), 1.0 / (1ULL << 9), 1.0 / (1ULL << 10), 1.0 / (1ULL << 11),
1.0 / (1ULL << 12), 1.0 / (1ULL << 13), 1.0 / (1ULL << 14), 1.0 / (1ULL << 15),
1.0 / (1ULL << 16), 1.0 / (1ULL << 17), 1.0 / (1ULL << 18), 1.0 / (1ULL << 19),
1.0 / (1ULL << 20), 1.0 / (1ULL << 21), 1.0 / (1ULL << 22), 1.0 / (1ULL << 23),
1.0 / (1ULL << 24), 1.0 / (1ULL << 25), 1.0 / (1ULL << 26), 1.0 / (1ULL << 27),
1.0 / (1ULL << 28), 1.0 / (1ULL << 29), 1.0 / (1ULL << 30), 1.0 / (1ULL << 31),
};
VertexLoaderARM64::VertexLoaderARM64(const TVtxDesc& vtx_desc, const VAT& vtx_att)
: VertexLoaderBase(vtx_desc, vtx_att), m_float_emit(this)
{
AllocCodeSpace(4096);
const Common::ScopedJITPageWriteAndNoExecute enable_jit_page_writes;
ClearCodeSpace();
GenerateVertexLoader();
WriteProtect(true);
}
// Returns the register to use as the base and an offset from that register.
// For indexed attributes, the index is read into scratch1_reg, and then scratch1_reg with no offset
// is returned. For direct attributes, an offset from src_reg is returned.
std::pair<Arm64Gen::ARM64Reg, u32> VertexLoaderARM64::GetVertexAddr(CPArray array,
VertexComponentFormat attribute)
{
if (IsIndexed(attribute))
{
if (attribute == VertexComponentFormat::Index8)
{
LDURB(scratch1_reg, src_reg, m_src_ofs);
m_src_ofs += 1;
}
else // Index16
{
LDURH(scratch1_reg, src_reg, m_src_ofs);
m_src_ofs += 2;
REV16(scratch1_reg, scratch1_reg);
}
if (array == CPArray::Position)
{
EOR(scratch2_reg, scratch1_reg,
attribute == VertexComponentFormat::Index8 ? LogicalImm(0xFF, GPRSize::B32) :
LogicalImm(0xFFFF, GPRSize::B32));
m_skip_vertex = CBZ(scratch2_reg);
}
LDR(IndexType::Unsigned, scratch2_reg, stride_reg, static_cast<u8>(array) * 4);
MUL(scratch1_reg, scratch1_reg, scratch2_reg);
LDR(IndexType::Unsigned, EncodeRegTo64(scratch2_reg), arraybase_reg,
static_cast<u8>(array) * 8);
ADD(EncodeRegTo64(scratch1_reg), EncodeRegTo64(scratch1_reg), EncodeRegTo64(scratch2_reg));
return {EncodeRegTo64(scratch1_reg), 0};
}
else
{
return {src_reg, m_src_ofs};
}
}
void VertexLoaderARM64::ReadVertex(VertexComponentFormat attribute, ComponentFormat format,
int count_in, int count_out, bool dequantize,
u8 scaling_exponent, AttributeFormat* native_format,
ARM64Reg reg, u32 offset)
{
ARM64Reg coords = count_in == 3 ? ARM64Reg::Q31 : ARM64Reg::D31;
ARM64Reg scale = count_in == 3 ? ARM64Reg::Q30 : ARM64Reg::D30;
int elem_size = GetElementSize(format);
int load_bytes = elem_size * count_in;
int load_size = GetLoadSize(load_bytes);
load_size <<= 3;
m_float_emit.LDUR(load_size, coords, reg, offset);
if (format < ComponentFormat::Float)
{
// Extend and convert to float
switch (format)
{
case ComponentFormat::UByte:
m_float_emit.UXTL(8, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
m_float_emit.UXTL(16, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
break;
case ComponentFormat::Byte:
m_float_emit.SXTL(8, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
m_float_emit.SXTL(16, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
break;
case ComponentFormat::UShort:
m_float_emit.REV16(8, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
m_float_emit.UXTL(16, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
break;
case ComponentFormat::Short:
m_float_emit.REV16(8, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
m_float_emit.SXTL(16, EncodeRegToDouble(coords), EncodeRegToDouble(coords));
break;
}
m_float_emit.SCVTF(32, coords, coords);
if (dequantize && scaling_exponent)
{
m_float_emit.LDR(32, IndexType::Unsigned, scale, scale_reg, scaling_exponent * 4);
m_float_emit.FMUL(32, coords, coords, scale, 0);
}
}
else
{
m_float_emit.REV32(8, coords, coords);
}
const u32 write_size = count_out == 3 ? 128 : count_out * 32;
m_float_emit.STUR(write_size, coords, dst_reg, m_dst_ofs);
// Z-Freeze
if (native_format == &m_native_vtx_decl.position)
{
CMP(remaining_reg, 3);
FixupBranch dont_store = B(CC_GE);
MOVP2R(EncodeRegTo64(scratch2_reg), VertexLoaderManager::position_cache.data());
m_float_emit.STR(128, coords, EncodeRegTo64(scratch2_reg), ArithOption(remaining_reg, true));
SetJumpTarget(dont_store);
}
else if (native_format == &m_native_vtx_decl.normals[1])
{
FixupBranch dont_store = CBNZ(remaining_reg);
MOVP2R(EncodeRegTo64(scratch2_reg), VertexLoaderManager::tangent_cache.data());
m_float_emit.STR(128, IndexType::Unsigned, coords, EncodeRegTo64(scratch2_reg), 0);
SetJumpTarget(dont_store);
}
else if (native_format == &m_native_vtx_decl.normals[2])
{
FixupBranch dont_store = CBNZ(remaining_reg);
MOVP2R(EncodeRegTo64(scratch2_reg), VertexLoaderManager::binormal_cache.data());
m_float_emit.STR(128, IndexType::Unsigned, coords, EncodeRegTo64(scratch2_reg), 0);
SetJumpTarget(dont_store);
}
native_format->components = count_out;
native_format->enable = true;
native_format->offset = m_dst_ofs;
native_format->type = ComponentFormat::Float;
native_format->integer = false;
m_dst_ofs += sizeof(float) * count_out;
if (attribute == VertexComponentFormat::Direct)
m_src_ofs += load_bytes;
}
void VertexLoaderARM64::ReadColor(VertexComponentFormat attribute, ColorFormat format, ARM64Reg reg,
u32 offset)
{
int load_bytes = 0;
switch (format)
{
case ColorFormat::RGB888:
case ColorFormat::RGB888x:
case ColorFormat::RGBA8888:
LDUR(scratch2_reg, reg, offset);
if (format != ColorFormat::RGBA8888)
ORR(scratch2_reg, scratch2_reg, LogicalImm(0xFF000000, GPRSize::B32));
STR(IndexType::Unsigned, scratch2_reg, dst_reg, m_dst_ofs);
load_bytes = format == ColorFormat::RGB888 ? 3 : 4;
break;
case ColorFormat::RGB565:
// RRRRRGGG GGGBBBBB
// AAAAAAAA BBBBBBBB GGGGGGGG RRRRRRRR
LDURH(scratch3_reg, reg, offset);
REV16(scratch3_reg, scratch3_reg);
// B
AND(scratch2_reg, scratch3_reg, LogicalImm(0x1F, GPRSize::B32));
ORR(scratch2_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 3));
ORR(scratch2_reg, scratch2_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 5));
ORR(scratch1_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 16));
// G
UBFM(scratch2_reg, scratch3_reg, 5, 10);
ORR(scratch2_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 2));
ORR(scratch2_reg, scratch2_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 6));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 8));
// R
UBFM(scratch2_reg, scratch3_reg, 11, 15);
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 3));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 2));
// A
ORR(scratch1_reg, scratch1_reg, LogicalImm(0xFF000000, GPRSize::B32));
STR(IndexType::Unsigned, scratch1_reg, dst_reg, m_dst_ofs);
load_bytes = 2;
break;
case ColorFormat::RGBA4444:
// BBBBAAAA RRRRGGGG
// REV16 - RRRRGGGG BBBBAAAA
// AAAAAAAA BBBBBBBB GGGGGGGG RRRRRRRR
LDURH(scratch3_reg, reg, offset);
// R
UBFM(scratch1_reg, scratch3_reg, 4, 7);
// G
AND(scratch2_reg, scratch3_reg, LogicalImm(0xF, GPRSize::B32));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 8));
// B
UBFM(scratch2_reg, scratch3_reg, 12, 15);
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 16));
// A
UBFM(scratch2_reg, scratch3_reg, 8, 11);
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 24));
// Final duplication
ORR(scratch1_reg, scratch1_reg, scratch1_reg, ArithOption(scratch1_reg, ShiftType::LSL, 4));
STR(IndexType::Unsigned, scratch1_reg, dst_reg, m_dst_ofs);
load_bytes = 2;
break;
case ColorFormat::RGBA6666:
// RRRRRRGG GGGGBBBB BBAAAAAA
// AAAAAAAA BBBBBBBB GGGGGGGG RRRRRRRR
LDUR(scratch3_reg, reg, offset - 1);
REV32(scratch3_reg, scratch3_reg);
// A
UBFM(scratch2_reg, scratch3_reg, 0, 5);
ORR(scratch2_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 2));
ORR(scratch2_reg, scratch2_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 6));
ORR(scratch1_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 24));
// B
UBFM(scratch2_reg, scratch3_reg, 6, 11);
ORR(scratch2_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 2));
ORR(scratch2_reg, scratch2_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 6));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 16));
// G
UBFM(scratch2_reg, scratch3_reg, 12, 17);
ORR(scratch2_reg, ARM64Reg::WSP, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 2));
ORR(scratch2_reg, scratch2_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 6));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 8));
// R
UBFM(scratch2_reg, scratch3_reg, 18, 23);
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSL, 2));
ORR(scratch1_reg, scratch1_reg, scratch2_reg, ArithOption(scratch2_reg, ShiftType::LSR, 4));
STR(IndexType::Unsigned, scratch1_reg, dst_reg, m_dst_ofs);
load_bytes = 3;
break;
}
if (attribute == VertexComponentFormat::Direct)
m_src_ofs += load_bytes;
}
void VertexLoaderARM64::GenerateVertexLoader()
{
// The largest input vertex (with the position matrix index and all texture matrix indices
// enabled, and all components set as direct) is 129 bytes (corresponding to a 156-byte
// output). This is small enough that we can always use the unscaled load/store instructions
// (which allow an offset from -256 to +255).
ASSERT(m_vertex_size <= 255);
// R0 - Source pointer
// R1 - Destination pointer
// R2 - Count
// R30 - LR
//
// R0 return how many
//
// Registers we don't have to worry about saving
// R9-R17 are caller saved temporaries
// R18 is a temporary or platform specific register(iOS)
//
// VFP registers
// We can touch all except v8-v15
// If we need to use those, we need to retain the lower 64bits(!) of the register
bool has_tc = false;
bool has_tc_scale = false;
for (size_t i = 0; i < m_VtxDesc.high.TexCoord.Size(); i++)
{
has_tc |= m_VtxDesc.high.TexCoord[i] != VertexComponentFormat::NotPresent;
has_tc_scale |= (m_VtxAttr.GetTexFrac(i) != 0);
}
bool need_scale = (m_VtxAttr.g0.ByteDequant && m_VtxAttr.g0.PosFrac) ||
(has_tc && has_tc_scale) ||
(m_VtxDesc.low.Normal != VertexComponentFormat::NotPresent);
AlignCode16();
if (IsIndexed(m_VtxDesc.low.Position))
MOV(skipped_reg, ARM64Reg::WZR);
ADD(saved_count, remaining_reg, 1);
MOVP2R(stride_reg, g_main_cp_state.array_strides.data());
MOVP2R(arraybase_reg, VertexLoaderManager::cached_arraybases.data());
if (need_scale)
MOVP2R(scale_reg, scale_factors);
const u8* loop_start = GetCodePtr();
if (m_VtxDesc.low.PosMatIdx)
{
LDRB(IndexType::Unsigned, scratch1_reg, src_reg, m_src_ofs);
AND(scratch1_reg, scratch1_reg, LogicalImm(0x3F, GPRSize::B32));
STR(IndexType::Unsigned, scratch1_reg, dst_reg, m_dst_ofs);
// Z-Freeze
CMP(remaining_reg, 3);
FixupBranch dont_store = B(CC_GE);
MOVP2R(EncodeRegTo64(scratch2_reg), VertexLoaderManager::position_matrix_index_cache.data());
STR(scratch1_reg, EncodeRegTo64(scratch2_reg), ArithOption(remaining_reg, true));
SetJumpTarget(dont_store);
m_native_vtx_decl.posmtx.components = 4;
m_native_vtx_decl.posmtx.enable = true;
m_native_vtx_decl.posmtx.offset = m_dst_ofs;
m_native_vtx_decl.posmtx.type = ComponentFormat::UByte;
m_native_vtx_decl.posmtx.integer = true;
m_src_ofs += sizeof(u8);
m_dst_ofs += sizeof(u32);
}
std::array<u32, 8> texmatidx_ofs;
for (size_t i = 0; i < m_VtxDesc.low.TexMatIdx.Size(); i++)
{
if (m_VtxDesc.low.TexMatIdx[i])
texmatidx_ofs[i] = m_src_ofs++;
}
// Position
{
const int pos_elements = m_VtxAttr.g0.PosElements == CoordComponentCount::XY ? 2 : 3;
const auto [reg, offset] = GetVertexAddr(CPArray::Position, m_VtxDesc.low.Position);
ReadVertex(m_VtxDesc.low.Position, m_VtxAttr.g0.PosFormat, pos_elements, pos_elements,
m_VtxAttr.g0.ByteDequant, m_VtxAttr.g0.PosFrac, &m_native_vtx_decl.position, reg,
offset);
}
if (m_VtxDesc.low.Normal != VertexComponentFormat::NotPresent)
{
static constexpr Common::EnumMap<u8, ComponentFormat::InvalidFloat7> SCALE_MAP = {7, 6, 15, 14,
0, 0, 0, 0};
const u8 scaling_exponent = SCALE_MAP[m_VtxAttr.g0.NormalFormat];
// Normal
auto [reg, offset] = GetVertexAddr(CPArray::Normal, m_VtxDesc.low.Normal);
ReadVertex(m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat, 3, 3, true, scaling_exponent,
&m_native_vtx_decl.normals[0], reg, offset);
if (m_VtxAttr.g0.NormalElements == NormalComponentCount::NTB)
{
const bool index3 = IsIndexed(m_VtxDesc.low.Normal) && m_VtxAttr.g0.NormalIndex3;
const int elem_size = GetElementSize(m_VtxAttr.g0.NormalFormat);
const int load_bytes = elem_size * 3;
// Tangent
// If in Index3 mode, and indexed components are used, replace the index with a new index.
if (index3)
std::tie(reg, offset) = GetVertexAddr(CPArray::Normal, m_VtxDesc.low.Normal);
// The tangent comes after the normal; even in index3 mode, an extra offset of load_bytes is
// applied. Note that this is different from adding 1 to the index, as the stride for indices
// may be different from the size of the tangent itself.
ReadVertex(m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat, 3, 3, true, scaling_exponent,
&m_native_vtx_decl.normals[1], reg, offset + load_bytes);
// Binormal
if (index3)
std::tie(reg, offset) = GetVertexAddr(CPArray::Normal, m_VtxDesc.low.Normal);
ReadVertex(m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat, 3, 3, true, scaling_exponent,
&m_native_vtx_decl.normals[2], reg, offset + load_bytes * 2);
}
}
for (u8 i = 0; i < m_VtxDesc.low.Color.Size(); i++)
{
m_native_vtx_decl.colors[i].components = 4;
m_native_vtx_decl.colors[i].type = ComponentFormat::UByte;
m_native_vtx_decl.colors[i].integer = false;
if (m_VtxDesc.low.Color[i] != VertexComponentFormat::NotPresent)
{
const auto [reg, offset] = GetVertexAddr(CPArray::Color0 + i, m_VtxDesc.low.Color[i]);
ReadColor(m_VtxDesc.low.Color[i], m_VtxAttr.GetColorFormat(i), reg, offset);
m_native_vtx_decl.colors[i].components = 4;
m_native_vtx_decl.colors[i].enable = true;
m_native_vtx_decl.colors[i].offset = m_dst_ofs;
m_native_vtx_decl.colors[i].type = ComponentFormat::UByte;
m_native_vtx_decl.colors[i].integer = false;
m_dst_ofs += 4;
}
}
for (u8 i = 0; i < m_VtxDesc.high.TexCoord.Size(); i++)
{
m_native_vtx_decl.texcoords[i].offset = m_dst_ofs;
m_native_vtx_decl.texcoords[i].type = ComponentFormat::Float;
m_native_vtx_decl.texcoords[i].integer = false;
const int elements = m_VtxAttr.GetTexElements(i) == TexComponentCount::S ? 1 : 2;
if (m_VtxDesc.high.TexCoord[i] != VertexComponentFormat::NotPresent)
{
const auto [reg, offset] = GetVertexAddr(CPArray::TexCoord0 + i, m_VtxDesc.high.TexCoord[i]);
u8 scaling_exponent = m_VtxAttr.GetTexFrac(i);
ReadVertex(m_VtxDesc.high.TexCoord[i], m_VtxAttr.GetTexFormat(i), elements,
m_VtxDesc.low.TexMatIdx[i] ? 2 : elements, m_VtxAttr.g0.ByteDequant,
scaling_exponent, &m_native_vtx_decl.texcoords[i], reg, offset);
}
if (m_VtxDesc.low.TexMatIdx[i])
{
m_native_vtx_decl.texcoords[i].components = 3;
m_native_vtx_decl.texcoords[i].enable = true;
m_native_vtx_decl.texcoords[i].type = ComponentFormat::Float;
m_native_vtx_decl.texcoords[i].integer = false;
LDRB(IndexType::Unsigned, scratch2_reg, src_reg, texmatidx_ofs[i]);
m_float_emit.UCVTF(ARM64Reg::S31, scratch2_reg);
if (m_VtxDesc.high.TexCoord[i] != VertexComponentFormat::NotPresent)
{
m_float_emit.STR(32, IndexType::Unsigned, ARM64Reg::D31, dst_reg, m_dst_ofs);
m_dst_ofs += sizeof(float);
}
else
{
m_native_vtx_decl.texcoords[i].offset = m_dst_ofs;
STUR(ARM64Reg::SP, dst_reg, m_dst_ofs);
m_float_emit.STR(32, IndexType::Unsigned, ARM64Reg::D31, dst_reg, m_dst_ofs + 8);
m_dst_ofs += sizeof(float) * 3;
}
}
}
// Prepare for the next vertex.
ADD(dst_reg, dst_reg, m_dst_ofs);
const u8* cont = GetCodePtr();
ADD(src_reg, src_reg, m_src_ofs);
SUBS(remaining_reg, remaining_reg, 1);
B(CCFlags::CC_GE, loop_start);
if (IsIndexed(m_VtxDesc.low.Position))
{
SUB(ARM64Reg::W0, saved_count, skipped_reg);
RET(ARM64Reg::X30);
SetJumpTarget(m_skip_vertex);
ADD(skipped_reg, skipped_reg, 1);
B(cont);
}
else
{
MOV(ARM64Reg::W0, saved_count);
RET(ARM64Reg::X30);
}
FlushIcache();
ASSERT_MSG(VIDEO, m_vertex_size == m_src_ofs,
"Vertex size from vertex loader ({}) does not match expected vertex size ({})!\nVtx "
"desc: {:08x} {:08x}\nVtx attr: {:08x} {:08x} {:08x}",
m_src_ofs, m_vertex_size, m_VtxDesc.low.Hex, m_VtxDesc.high.Hex, m_VtxAttr.g0.Hex,
m_VtxAttr.g1.Hex, m_VtxAttr.g2.Hex);
m_native_vtx_decl.stride = m_dst_ofs;
}
int VertexLoaderARM64::RunVertices(const u8* src, u8* dst, int count)
{
m_numLoadedVertices += count;
return ((int (*)(const u8* src, u8* dst, int count))region)(src, dst, count - 1);
}
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