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GLSL: implement inf, nan.

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Use uintBitsToFloat.

Bug: tint:1306
Change-Id: Ie9a5e14c13c0d63b57c126f16c4e2a5c7a77e3f7
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69740
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
This commit is contained in:
Stephen White
2021-11-18 13:11:43 +00:00
committed by Tint LUCI CQ
parent d018d2e5bc
commit 1704fe53f5
5 changed files with 7 additions and 42 deletions
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5
src/writer/glsl/generator_impl.cc
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@@ -2081,9 +2081,10 @@ bool GeneratorImpl::EmitLiteral(std::ostream& out,
out << (l->value ? "true" : "false");
} else if (auto* fl = lit->As<ast::FloatLiteralExpression>()) {
if (std::isinf(fl->value)) {
out << (fl->value >= 0 ? "asfloat(0x7f800000u)" : "asfloat(0xff800000u)");
out << (fl->value >= 0 ? "uintBitsToFloat(0x7f800000u)"
: "uintBitsToFloat(0xff800000u)");
} else if (std::isnan(fl->value)) {
out << "asfloat(0x7fc00000u)";
out << "uintBitsToFloat(0x7fc00000u)";
} else {
out << FloatToString(fl->value) << "f";
}