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[metal-writer] Stub out the Metal Shading Language backend.

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This CL adds the basis of the Metal Shading Language backend.

Bug: tint:8
Change-Id: I85976250eb41ac12203a5db116444e993c3d09d4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/23700
Reviewed-by: David Neto <dneto@google.com>
This commit is contained in:
dan sinclair
2020-06-23 17:48:40 +00:00
parent 9a452c11ae
commit 2a59901483
51 changed files with 740 additions and 143 deletions
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39
samples/main.cc
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@@ -32,6 +32,7 @@ enum class Format {
kSpirv,
kSpvAsm,
kWgsl,
kMsl,
};
struct Options {
@@ -49,12 +50,13 @@ struct Options {
const char kUsage[] = R"(Usage: tint [options] <input-file>
options:
--format <spirv|spvasm|wgsl> -- Output format.
--format <spirv|spvasm|wgsl|msl> -- Output format.
If not provided, will be inferred from output
filename extension:
.spvasm -> spvasm
.spv -> spirv
.wgsl -> wgsl
.metal -> msl
If none matches, then default to SPIR-V assembly.
--output-file <name> -- Output file name. Use "-" for standard output
-o <name> -- Output file name. Use "-" for standard output
@@ -79,6 +81,11 @@ Format parse_format(const std::string& fmt) {
return Format::kWgsl;
#endif // TINT_BUILD_WGSL_WRITER
#if TINT_BUILD_MSL_WRITER
if (fmt == "msl")
return Format::kMsl;
#endif // TINT_BUILD_MSL_WRITER
return Format::kNone;
}
@@ -95,16 +102,32 @@ bool ends_with(const std::string& input, const std::string& suffix) {
/// @param filename the filename to inspect
/// @returns the inferred format for the filename suffix
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-parameter"
Format infer_format(const std::string& filename) {
#pragma clang diagnostic pop
#if TINT_BUILD_SPV_WRITER
if (ends_with(filename, ".spv")) {
return Format::kSpirv;
}
if (ends_with(filename, ".spvasm")) {
return Format::kSpvAsm;
}
#endif // TINT_BUILD_SPV_WRITER
#if TINT_BUILD_WGSL_WRITER
if (ends_with(filename, ".wgsl")) {
return Format::kWgsl;
}
#endif // TINT_BUILD_WGSL_WRITER
#if TINT_BUILD_MSL_WRITER
if (ends_with(filename, ".metal")) {
return Format::kMsl;
}
#endif // TINT_BUILD_WGSL_WRITER
return Format::kNone;
}
@@ -417,6 +440,12 @@ int main(int argc, const char** argv) {
}
#endif // TINT_BUILD_WGSL_WRITER
#if TINT_BUILD_MSL_WRITER
if (options.format == Format::kMsl) {
writer = std::make_unique<tint::writer::msl::Generator>(std::move(mod));
}
#endif // TINT_BUILDER_MSL_WRITER
if (!writer) {
std::cerr << "Unknown output format specified" << std::endl;
return 1;
@@ -443,14 +472,14 @@ int main(int argc, const char** argv) {
}
#endif // TINT_BUILD_SPV_WRITER
#if TINT_BUILD_WGSL_WRITER
if (options.format == Format::kWgsl) {
auto* w = static_cast<tint::writer::wgsl::Generator*>(writer.get());
#if TINT_BUILD_WGSL_WRITER || TINT_BUILD_MSL_WRITER
if (options.format == Format::kWgsl || options.format == Format::kMsl) {
auto* w = static_cast<tint::writer::Text*>(writer.get());
if (!WriteFile(options.output_file, "w", w->result())) {
return 1;
}
}
#endif // TINT_BUILD_WGSL_WRITER
#endif // TINT_BUILD_WGSL_WRITER || TINT_BUILD_MSL_WRITER
return 0;
}