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melonDS
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Add `alignas` specifiers to some arrays based on how they're accessed (#1933) 

* Align some two-element `u32` arrays as `u64`s

- To pacify "unaligned read/write" warnings from UBSan

* Align some more arrays based on how they're accessed
This commit is contained in:
Jesse Talavera 2023-12-26 16:09:39 -05:00 committed by GitHub
parent ab8938a695
commit cbd65a131e
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 24 additions and 24 deletions
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34
src/GPU.h
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@ -536,18 +536,18 @@ public:
u8 VRAMCNT[9] {};
u8 VRAMSTAT = 0;
u8 Palette[2*1024] {};
u8 OAM[2*1024] {};
alignas(u64) u8 Palette[2*1024] {};
alignas(u64) u8 OAM[2*1024] {};
u8 VRAM_A[128*1024] {};
u8 VRAM_B[128*1024] {};
u8 VRAM_C[128*1024] {};
u8 VRAM_D[128*1024] {};
u8 VRAM_E[ 64*1024] {};
u8 VRAM_F[ 16*1024] {};
u8 VRAM_G[ 16*1024] {};
u8 VRAM_H[ 32*1024] {};
u8 VRAM_I[ 16*1024] {};
alignas(u64) u8 VRAM_A[128*1024] {};
alignas(u64) u8 VRAM_B[128*1024] {};
alignas(u64) u8 VRAM_C[128*1024] {};
alignas(u64) u8 VRAM_D[128*1024] {};
alignas(u64) u8 VRAM_E[ 64*1024] {};
alignas(u64) u8 VRAM_F[ 16*1024] {};
alignas(u64) u8 VRAM_G[ 16*1024] {};
alignas(u64) u8 VRAM_H[ 32*1024] {};
alignas(u64) u8 VRAM_I[ 16*1024] {};
u8* const VRAM[9] = {VRAM_A, VRAM_B, VRAM_C, VRAM_D, VRAM_E, VRAM_F, VRAM_G, VRAM_H, VRAM_I};
u32 const VRAMMask[9] = {0x1FFFF, 0x1FFFF, 0x1FFFF, 0x1FFFF, 0xFFFF, 0x3FFF, 0x3FFF, 0x7FFF, 0x3FFF};
@ -596,14 +596,14 @@ public:
u8 VRAMFlat_AOBJ[256*1024] {};
u8 VRAMFlat_BOBJ[128*1024] {};
u8 VRAMFlat_ABGExtPal[32*1024] {};
u8 VRAMFlat_BBGExtPal[32*1024] {};
alignas(u16) u8 VRAMFlat_ABGExtPal[32*1024] {};
alignas(u16) u8 VRAMFlat_BBGExtPal[32*1024] {};
u8 VRAMFlat_AOBJExtPal[8*1024] {};
u8 VRAMFlat_BOBJExtPal[8*1024] {};
alignas(u16) u8 VRAMFlat_AOBJExtPal[8*1024] {};
alignas(u16) u8 VRAMFlat_BOBJExtPal[8*1024] {};
u8 VRAMFlat_Texture[512*1024] {};
u8 VRAMFlat_TexPal[128*1024] {};
alignas(u64) u8 VRAMFlat_Texture[512*1024] {};
alignas(u64) u8 VRAMFlat_TexPal[128*1024] {};
private:
void ResetVRAMCache() noexcept;
void AssignFramebuffers() noexcept;

14
src/NDS.h
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@ -259,8 +259,8 @@ public: // TODO: Encapsulate the rest of these members
u16 PowerControl9;
u16 ExMemCnt[2];
u8 ROMSeed0[2*8];
u8 ROMSeed1[2*8];
alignas(u32) u8 ROMSeed0[2*8];
alignas(u32) u8 ROMSeed1[2*8];
protected:
// These BIOS arrays should be declared *before* the component objects (JIT, SPI, etc.)
@ -489,12 +489,12 @@ private:
FIFO<u32, 16> IPCFIFO9; // FIFO in which the ARM9 writes
FIFO<u32, 16> IPCFIFO7;
u16 DivCnt;
u32 DivNumerator[2];
u32 DivDenominator[2];
u32 DivQuotient[2];
u32 DivRemainder[2];
alignas(u64) u32 DivNumerator[2];
alignas(u64) u32 DivDenominator[2];
alignas(u64) u32 DivQuotient[2];
alignas(u64) u32 DivRemainder[2];
u16 SqrtCnt;
u32 SqrtVal[2];
alignas(u64) u32 SqrtVal[2];
u32 SqrtRes;
u16 KeyCnt[2];
bool Running;