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https://github.com/encounter/dawn-cmake.git
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df3630c194
Currently polyfilled for all backends. HLSL should be able to map this to 'firstbitlow', but there might need to be some special case handling for 0 (undocumented behavior). For now just polyfill. CTS tests: https://github.com/gpuweb/cts/pull/1003 Bug: tint:1367 Bug: tint:1449 Change-Id: I8125b32687196678906e5a9d056b4f2efd885073 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/81502 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: David Neto <dneto@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>
94 lines
2.7 KiB
GLSL
94 lines
2.7 KiB
GLSL
#version 310 es
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uvec4 tint_first_trailing_bit(uvec4 v) {
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uvec4 x = uvec4(v);
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uvec4 b16 = mix(uvec4(16u), uvec4(0u), bvec4((x & uvec4(65535u))));
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x = (x >> b16);
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uvec4 b8 = mix(uvec4(8u), uvec4(0u), bvec4((x & uvec4(255u))));
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x = (x >> b8);
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uvec4 b4 = mix(uvec4(4u), uvec4(0u), bvec4((x & uvec4(15u))));
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x = (x >> b4);
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uvec4 b2 = mix(uvec4(2u), uvec4(0u), bvec4((x & uvec4(3u))));
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x = (x >> b2);
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uvec4 b1 = mix(uvec4(1u), uvec4(0u), bvec4((x & uvec4(1u))));
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uvec4 is_zero = mix(uvec4(0u), uvec4(4294967295u), equal(x, uvec4(0u)));
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return uvec4((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstTrailingBit_110f2c() {
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uvec4 res = tint_first_trailing_bit(uvec4(0u, 0u, 0u, 0u));
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}
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vec4 vertex_main() {
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firstTrailingBit_110f2c();
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return vec4(0.0f, 0.0f, 0.0f, 0.0f);
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}
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void main() {
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vec4 inner_result = vertex_main();
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gl_Position = inner_result;
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gl_Position.y = -(gl_Position.y);
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gl_Position.z = ((2.0f * gl_Position.z) - gl_Position.w);
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return;
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}
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#version 310 es
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precision mediump float;
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uvec4 tint_first_trailing_bit(uvec4 v) {
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uvec4 x = uvec4(v);
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uvec4 b16 = mix(uvec4(16u), uvec4(0u), bvec4((x & uvec4(65535u))));
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x = (x >> b16);
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uvec4 b8 = mix(uvec4(8u), uvec4(0u), bvec4((x & uvec4(255u))));
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x = (x >> b8);
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uvec4 b4 = mix(uvec4(4u), uvec4(0u), bvec4((x & uvec4(15u))));
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x = (x >> b4);
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uvec4 b2 = mix(uvec4(2u), uvec4(0u), bvec4((x & uvec4(3u))));
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x = (x >> b2);
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uvec4 b1 = mix(uvec4(1u), uvec4(0u), bvec4((x & uvec4(1u))));
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uvec4 is_zero = mix(uvec4(0u), uvec4(4294967295u), equal(x, uvec4(0u)));
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return uvec4((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstTrailingBit_110f2c() {
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uvec4 res = tint_first_trailing_bit(uvec4(0u, 0u, 0u, 0u));
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}
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void fragment_main() {
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firstTrailingBit_110f2c();
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}
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void main() {
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fragment_main();
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return;
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}
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#version 310 es
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uvec4 tint_first_trailing_bit(uvec4 v) {
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uvec4 x = uvec4(v);
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uvec4 b16 = mix(uvec4(16u), uvec4(0u), bvec4((x & uvec4(65535u))));
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x = (x >> b16);
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uvec4 b8 = mix(uvec4(8u), uvec4(0u), bvec4((x & uvec4(255u))));
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x = (x >> b8);
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uvec4 b4 = mix(uvec4(4u), uvec4(0u), bvec4((x & uvec4(15u))));
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x = (x >> b4);
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uvec4 b2 = mix(uvec4(2u), uvec4(0u), bvec4((x & uvec4(3u))));
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x = (x >> b2);
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uvec4 b1 = mix(uvec4(1u), uvec4(0u), bvec4((x & uvec4(1u))));
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uvec4 is_zero = mix(uvec4(0u), uvec4(4294967295u), equal(x, uvec4(0u)));
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return uvec4((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstTrailingBit_110f2c() {
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uvec4 res = tint_first_trailing_bit(uvec4(0u, 0u, 0u, 0u));
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}
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void compute_main() {
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firstTrailingBit_110f2c();
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}
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layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
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void main() {
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compute_main();
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return;
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}
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