dawn-cmake/test/tint/builtins/gen/countTrailingZeros/21e394.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
1.0 KiB
HLSL

uint tint_count_trailing_zeros(uint v) {
uint x = uint(v);
const uint b16 = (bool((x & 65535u)) ? 0u : 16u);
x = (x >> b16);
const uint b8 = (bool((x & 255u)) ? 0u : 8u);
x = (x >> b8);
const uint b4 = (bool((x & 15u)) ? 0u : 4u);
x = (x >> b4);
const uint b2 = (bool((x & 3u)) ? 0u : 2u);
x = (x >> b2);
const uint b1 = (bool((x & 1u)) ? 0u : 1u);
const uint is_zero = ((x == 0u) ? 1u : 0u);
return uint((((((b16 | b8) | b4) | b2) | b1) + is_zero));
}
void countTrailingZeros_21e394() {
uint res = tint_count_trailing_zeros(1u);
}
struct tint_symbol {
float4 value : SV_Position;
};
float4 vertex_main_inner() {
countTrailingZeros_21e394();
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_21e394();
return;
}
[numthreads(1, 1, 1)]
void compute_main() {
countTrailingZeros_21e394();
return;
}