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HLSL's % operator results in less precise results than expected. Bug: tint:1799 Change-Id: I1a9572288a0e536f0fc9c0748a25dcf58551e57b Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/119760 Kokoro: Kokoro <noreply+kokoro@google.com> Kokoro: Ben Clayton <bclayton@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Antonio Maiorano <amaiorano@google.com>
36 lines
864 B
HLSL
36 lines
864 B
HLSL
[numthreads(1, 1, 1)]
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void unused_entry_point() {
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return;
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}
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static int a = 0;
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static float b = 0.0f;
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int tint_div(int lhs, int rhs) {
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return (lhs / (((rhs == 0) | ((lhs == -2147483648) & (rhs == -1))) ? 1 : rhs));
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}
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int tint_mod(int lhs, int rhs) {
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const int rhs_or_one = (((rhs == 0) | ((lhs == -2147483648) & (rhs == -1))) ? 1 : rhs);
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if (any(((uint((lhs | rhs_or_one)) & 2147483648u) != 0u))) {
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return (lhs - ((lhs / rhs_or_one) * rhs_or_one));
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} else {
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return (lhs % rhs_or_one);
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}
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}
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float tint_float_mod(float lhs, float rhs) {
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return (lhs - (trunc((lhs / rhs)) * rhs));
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}
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void foo(int maybe_zero) {
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a = tint_div(a, 0);
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a = tint_mod(a, 0);
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a = tint_div(a, maybe_zero);
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a = tint_mod(a, maybe_zero);
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b = (b / 0.0f);
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b = tint_float_mod(b, 0.0f);
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b = (b / float(maybe_zero));
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b = tint_float_mod(b, float(maybe_zero));
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}
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