yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

sricker-nvidiaFix broken -emit-spirv-via-glsl test option (#7091)b39ec87cc

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1// struct-bit-cast-2.slang
2// Test bit casts for read across boundaries of scalar types.
3
4//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -vk -shaderobj -emit-spirv-directly
5//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -cpu -shaderobj
6//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -cuda -shaderobj
7
8// Test that bit_cast works for bit-reinterpreting one struct type as another.
9
10struct Foo
11{
12    uint16_t a;
13    uint16_t b;
14    uint32_t c;
15}
16
17struct Bar
18{
19    uint64_t d;
20}
21
22
23//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
24RWStructuredBuffer<int> outputBuffer;
25
26[numthreads(1, 1, 1)]
27void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
28{
29    Bar b = { 0x1122334455667788 };
30
31    Foo f = bit_cast<Foo>(b);
32    // CHECK: 7788
33    outputBuffer[0] = f.a;
34    // CHECK: 5566
35    outputBuffer[1] = f.b;
36    // CHECK: 11223344
37    outputBuffer[2] = f.c;
38
39    uint8_t4 v = {0x10, 0x20, 0x30, 0x40};
40    uint32_t u = bit_cast<uint32_t>(v);
41
42    // CHECK: 40302010
43    outputBuffer[3] = u;
44
45    int* ptr = bit_cast<int*>(b.d);
46    Foo f1 = bit_cast<Foo>(ptr);
47    // CHECK: 11223344
48    outputBuffer[4] = f1.c;
49}