dawn-cmake/test/tint/builtins/gen/countTrailingZeros/1dc84a.wgsl.expected.hlsl
Ben Clayton f8672d8c35 builtins: Add countTrailingZeros
Requires polyfilling for all but the MSL backend.

CTS tests: https://github.com/gpuweb/cts/pull/1002

Bug: tint:1367
Change-Id: I0cf56b74c01f30436f9ad00595a554a4042587e4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/81501
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
2022-02-22 23:16:39 +00:00

46 lines
1.3 KiB
HLSL

int4 tint_count_trailing_zeros(int4 v) {
uint4 x = uint4(v);
const uint4 b16 = (bool4((x & uint4((65535u).xxxx))) ? uint4((0u).xxxx) : uint4((16u).xxxx));
x = (x >> b16);
const uint4 b8 = (bool4((x & uint4((255u).xxxx))) ? uint4((0u).xxxx) : uint4((8u).xxxx));
x = (x >> b8);
const uint4 b4 = (bool4((x & uint4((15u).xxxx))) ? uint4((0u).xxxx) : uint4((4u).xxxx));
x = (x >> b4);
const uint4 b2 = (bool4((x & uint4((3u).xxxx))) ? uint4((0u).xxxx) : uint4((2u).xxxx));
x = (x >> b2);
const uint4 b1 = (bool4((x & uint4((1u).xxxx))) ? uint4((0u).xxxx) : uint4((1u).xxxx));
const uint4 is_zero = ((x == uint4((0u).xxxx)) ? uint4((1u).xxxx) : uint4((0u).xxxx));
return int4((((((b16 | b8) | b4) | b2) | b1) + is_zero));
}
void countTrailingZeros_1dc84a() {
int4 res = tint_count_trailing_zeros(int4(0, 0, 0, 0));
}
struct tint_symbol {
float4 value : SV_Position;
};
float4 vertex_main_inner() {
countTrailingZeros_1dc84a();
return float4(0.0f, 0.0f, 0.0f, 0.0f);
}
tint_symbol vertex_main() {
const float4 inner_result = vertex_main_inner();
tint_symbol wrapper_result = (tint_symbol)0;
wrapper_result.value = inner_result;
return wrapper_result;
}
void fragment_main() {
countTrailingZeros_1dc84a();
return;
}
[numthreads(1, 1, 1)]
void compute_main() {
countTrailingZeros_1dc84a();
return;
}