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4f3f45c00f
This CL fix insertBits polyfill to handle with the left-shifting behavior in HLSL, i.e. `(1u << 32u) == (1u << 0u) == 1u` where we want the result to be `0u`. Fixed: tint:1743 Change-Id: Ibb82abe4ab2f76dbb0fa06057fb19f15f961d969 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/108166 Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com> Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
25 lines
663 B
HLSL
25 lines
663 B
HLSL
int3 tint_insert_bits(int3 v, int3 n, uint offset, uint count) {
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const uint e = (offset + count);
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const uint mask = ((((offset < 32u) ? (1u << offset) : 0u) - 1u) ^ (((e < 32u) ? (1u << e) : 0u) - 1u));
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return ((((offset < 32u) ? (n << uint3((offset).xxx)) : (0).xxx) & int3((int(mask)).xxx)) | (v & int3((int(~(mask))).xxx)));
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}
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void f_1() {
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int3 v = (0).xxx;
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int3 n = (0).xxx;
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uint offset_1 = 0u;
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uint count = 0u;
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const int3 x_18 = v;
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const int3 x_19 = n;
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const uint x_20 = offset_1;
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const uint x_21 = count;
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const int3 x_16 = tint_insert_bits(x_18, x_19, x_20, x_21);
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return;
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}
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[numthreads(1, 1, 1)]
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void f() {
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f_1();
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return;
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}
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