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https://github.com/encounter/dawn-cmake.git
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8169693136
Currently polyfilled for all backends. HLSL should be able to map this to 'firstbithigh', 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/1004 Bug: tint:1367 Bug: tint:1449 Change-Id: I9c9a08ea93d1c4a602e0ab763e95e2eea336fb0d Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/81503 Reviewed-by: David Neto <dneto@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>
94 lines
2.2 KiB
GLSL
94 lines
2.2 KiB
GLSL
#version 310 es
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int tint_first_leading_bit(int v) {
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uint x = ((v < 0) ? uint(~(v)) : uint(v));
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uint b16 = (bool((x & 4294901760u)) ? 16u : 0u);
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x = (x >> b16);
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uint b8 = (bool((x & 65280u)) ? 8u : 0u);
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x = (x >> b8);
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uint b4 = (bool((x & 240u)) ? 4u : 0u);
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x = (x >> b4);
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uint b2 = (bool((x & 12u)) ? 2u : 0u);
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x = (x >> b2);
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uint b1 = (bool((x & 2u)) ? 1u : 0u);
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uint is_zero = ((x == 0u) ? 4294967295u : 0u);
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return int((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstLeadingBit_57a1a3() {
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int res = tint_first_leading_bit(1);
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}
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vec4 vertex_main() {
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firstLeadingBit_57a1a3();
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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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int tint_first_leading_bit(int v) {
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uint x = ((v < 0) ? uint(~(v)) : uint(v));
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uint b16 = (bool((x & 4294901760u)) ? 16u : 0u);
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x = (x >> b16);
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uint b8 = (bool((x & 65280u)) ? 8u : 0u);
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x = (x >> b8);
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uint b4 = (bool((x & 240u)) ? 4u : 0u);
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x = (x >> b4);
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uint b2 = (bool((x & 12u)) ? 2u : 0u);
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x = (x >> b2);
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uint b1 = (bool((x & 2u)) ? 1u : 0u);
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uint is_zero = ((x == 0u) ? 4294967295u : 0u);
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return int((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstLeadingBit_57a1a3() {
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int res = tint_first_leading_bit(1);
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}
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void fragment_main() {
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firstLeadingBit_57a1a3();
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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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int tint_first_leading_bit(int v) {
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uint x = ((v < 0) ? uint(~(v)) : uint(v));
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uint b16 = (bool((x & 4294901760u)) ? 16u : 0u);
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x = (x >> b16);
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uint b8 = (bool((x & 65280u)) ? 8u : 0u);
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x = (x >> b8);
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uint b4 = (bool((x & 240u)) ? 4u : 0u);
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x = (x >> b4);
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uint b2 = (bool((x & 12u)) ? 2u : 0u);
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x = (x >> b2);
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uint b1 = (bool((x & 2u)) ? 1u : 0u);
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uint is_zero = ((x == 0u) ? 4294967295u : 0u);
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return int((((((b16 | b8) | b4) | b2) | b1) | is_zero));
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}
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void firstLeadingBit_57a1a3() {
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int res = tint_first_leading_bit(1);
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}
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void compute_main() {
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firstLeadingBit_57a1a3();
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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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