Ben Clayton 46ee63933c tint/transform: Implement div / mod polyfill
Prevents UB for divide-by-zero and integer overflow when dividing

Fixed: tint:1349
Change-Id: Ieef66d27d7aec3011628ced076b2bccc7770a8af
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/108925
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
2022-11-09 22:04:11 +00:00

19 lines
327 B
GLSL

#version 310 es
uvec3 tint_div(uint lhs, uvec3 rhs) {
uvec3 l = uvec3(lhs);
return (l / mix(rhs, uvec3(1u), equal(rhs, uvec3(0u))));
}
void f() {
uint a = 4u;
uvec3 b = uvec3(1u, 2u, 3u);
uvec3 r = tint_div(a, b);
}
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
f();
return;
}