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tint/transform: Implement div / mod polyfill

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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>
This commit is contained in:
Ben Clayton
2022-11-09 22:04:11 +00:00
committed by Dawn LUCI CQ
parent 9418152d08
commit 46ee63933c
427 changed files with 7255 additions and 3789 deletions
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13
test/tint/builtins/atomicStore/array/arrays.spvasm.expected.glsl
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@@ -1,5 +1,13 @@
#version 310 es
uint tint_div(uint lhs, uint rhs) {
return (lhs / ((rhs == 0u) ? 1u : rhs));
}
uint tint_mod(uint lhs, uint rhs) {
return (lhs % ((rhs == 0u) ? 1u : rhs));
}
uint local_invocation_index_1 = 0u;
shared uint wg[3][2][1];
void compute_main_inner(uint local_invocation_index) {
@@ -13,7 +21,10 @@ void compute_main_inner(uint local_invocation_index) {
uint x_31 = idx;
uint x_33 = idx;
uint x_35 = idx;
atomicExchange(wg[(x_31 / 2u)][(x_33 % 2u)][(x_35 % 1u)], 0u);
uint tint_symbol = tint_div(x_31, 2u);
uint tint_symbol_1 = tint_mod(x_33, 2u);
uint tint_symbol_2 = tint_mod(x_35, 1u);
atomicExchange(wg[tint_symbol][tint_symbol_1][tint_symbol_2], 0u);
{
uint x_42 = idx;
idx = (x_42 + 1u);