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remove cbuf

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ryana 2026-04-28 19:05:48 +08:00
parent 9ad9dedc62
commit b45a04f757
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GPG key ID: 1B0D2A9833DC2348
1 changed files with 4 additions and 51 deletions
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55
src/shader_recompiler/ir_opt/texture_pass.cpp
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@ -33,9 +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;
constexpr u32 TIC_INDEX_MASK = (1U << 20) - 1;
u32 DynamicDescriptorSizeShift(const IR::U32& dynamic_offset) {
const IR::Inst* const inst{dynamic_offset.InstRecursive()};
@ -50,54 +48,9 @@ u32 DynamicDescriptorSizeShift(const IR::U32& dynamic_offset) {
return size_shift < 31 ? size_shift : DESCRIPTOR_SIZE_SHIFT;
}
bool IsNullTextureHandle(u32 raw_handle) {
return (raw_handle & TIC_INDEX_MASK) == 0;
}
u32 DynamicDescriptorCount(Environment& env, u32 cbuf_index, u32 base_offset, u32 size_shift) {
if (size_shift >= 31) {
return DEFAULT_DYNAMIC_DESCRIPTOR_COUNT;
}
if (base_offset >= DYNAMIC_DESCRIPTOR_CBUF_BYTES) {
return 1;
}
const u32 stride{1U << size_shift};
const u32 available{DYNAMIC_DESCRIPTOR_CBUF_BYTES - base_offset};
const u32 available_count{std::max(1U, available / stride)};
const u32 max_count{size_shift == DESCRIPTOR_SIZE_SHIFT
? std::min(available_count, DEFAULT_DYNAMIC_DESCRIPTOR_COUNT)
: std::min(available_count, MAX_DYNAMIC_DESCRIPTOR_COUNT)};
// dynamic handles do not expose an array length, so infer a bounded span from the cbuf payload.
u32 previous{env.ReadCbufValue(cbuf_index, base_offset)};
const u32 first{previous};
bool saw_valid{!IsNullTextureHandle(previous)};
bool saw_variation{false};
u32 repeat_start{0};
u32 repeat_count{1};
for (u32 i = 1; i < max_count; ++i) {
const u32 value{env.ReadCbufValue(cbuf_index, base_offset + (i << size_shift))};
if (IsNullTextureHandle(value) && saw_valid) {
return i;
}
saw_valid |= !IsNullTextureHandle(value);
if (value == previous) {
++repeat_count;
if (saw_variation && value == first &&
repeat_count >= DEFAULT_DYNAMIC_DESCRIPTOR_COUNT) {
return repeat_start;
}
if (saw_variation && repeat_count >= DEFAULT_DYNAMIC_DESCRIPTOR_COUNT &&
repeat_start >= DEFAULT_DYNAMIC_DESCRIPTOR_COUNT) {
return repeat_start;
}
continue;
}
saw_variation = true;
previous = value;
repeat_start = i;
repeat_count = 1;
}
return max_count;
u32 DynamicDescriptorCount(u32 size_shift) {
return size_shift == DESCRIPTOR_SIZE_SHIFT ? DEFAULT_DYNAMIC_DESCRIPTOR_COUNT
: MAX_DYNAMIC_DESCRIPTOR_COUNT;
}
IR::Opcode IndexedInstruction(const IR::Inst& inst) {
@ -432,7 +385,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
.secondary_offset = 0,
.secondary_shift_left = 0,
.dynamic_offset = dynamic_offset,
.count = DynamicDescriptorCount(env, index.U32(), base_offset, size_shift),
.count = DynamicDescriptorCount(size_shift),
.size_shift = size_shift,
.has_secondary = false,
};