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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>
41 lines
913 B
HLSL
41 lines
913 B
HLSL
uint tint_insert_bits(uint v, uint 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 << offset) : 0u) & mask) | (v & ~(mask)));
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}
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void insertBits_e3e3a2() {
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uint arg_0 = 1u;
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uint arg_1 = 1u;
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uint arg_2 = 1u;
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uint arg_3 = 1u;
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uint res = tint_insert_bits(arg_0, arg_1, arg_2, arg_3);
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}
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struct tint_symbol {
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float4 value : SV_Position;
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};
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float4 vertex_main_inner() {
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insertBits_e3e3a2();
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return (0.0f).xxxx;
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}
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tint_symbol vertex_main() {
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const float4 inner_result = vertex_main_inner();
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tint_symbol wrapper_result = (tint_symbol)0;
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wrapper_result.value = inner_result;
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return wrapper_result;
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}
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void fragment_main() {
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insertBits_e3e3a2();
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return;
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}
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[numthreads(1, 1, 1)]
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void compute_main() {
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insertBits_e3e3a2();
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return;
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}
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