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bound by cbuf size

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ryana 2026-04-28 19:37:49 +08:00
parent f8051bab5b
commit 01c2ac5dcd
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GPG key ID: 1B0D2A9833DC2348
1 changed files with 19 additions and 3 deletions
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22
src/shader_recompiler/ir_opt/texture_pass.cpp
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@ -33,6 +33,7 @@ using TextureInstVector = boost::container::small_vector<TextureInst, 24>;
constexpr u32 DESCRIPTOR_SIZE = 8;
constexpr u32 DESCRIPTOR_SIZE_SHIFT = static_cast<u32>(std::countr_zero(DESCRIPTOR_SIZE));
constexpr u32 DEFAULT_DYNAMIC_DESCRIPTOR_COUNT = 8;
constexpr u32 DYNAMIC_DESCRIPTOR_CBUF_BYTES = 16 * 1024;
constexpr u32 MAX_DYNAMIC_DESCRIPTOR_COUNT = 64;
u32 DynamicDescriptorSizeShift(const IR::U32& dynamic_offset) {
@ -45,7 +46,23 @@ u32 DynamicDescriptorSizeShift(const IR::U32& dynamic_offset) {
return DESCRIPTOR_SIZE_SHIFT;
}
const u32 size_shift{shift.U32()};
return size_shift < 31 ? size_shift : DESCRIPTOR_SIZE_SHIFT;
return size_shift >= DESCRIPTOR_SIZE_SHIFT && size_shift < 31 ? size_shift
: DESCRIPTOR_SIZE_SHIFT;
}
u32 DynamicDescriptorCount(u32 base_offset, u32 size_shift) {
if (size_shift >= 31 || base_offset >= DYNAMIC_DESCRIPTOR_CBUF_BYTES) {
return 1;
}
const u32 stride{1U << size_shift};
const u32 available{DYNAMIC_DESCRIPTOR_CBUF_BYTES - base_offset};
if (available < DESCRIPTOR_SIZE) {
return 1;
}
const u32 available_count{1U + (available - DESCRIPTOR_SIZE) / stride};
const u32 desired_count{size_shift == DESCRIPTOR_SIZE_SHIFT ? DEFAULT_DYNAMIC_DESCRIPTOR_COUNT
: MAX_DYNAMIC_DESCRIPTOR_COUNT};
return std::min(desired_count, available_count);
}
IR::Opcode IndexedInstruction(const IR::Inst& inst) {
@ -378,8 +395,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
.secondary_offset = 0,
.secondary_shift_left = 0,
.dynamic_offset = dynamic_offset,
.count = size_shift == DESCRIPTOR_SIZE_SHIFT ? DEFAULT_DYNAMIC_DESCRIPTOR_COUNT
: MAX_DYNAMIC_DESCRIPTOR_COUNT,
.count = DynamicDescriptorCount(base_offset, size_shift),
.has_secondary = false,
};
}