ngzhian created this revision.
ngzhian added a reviewer: tlively.
Herald added subscribers: dang, ecnelises, sunfish, jgravelle-google, sbc100,
dschuff.
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Herald added a project: clang.
This currently only defines a constant, but it the future will be used
to gate builtins for experimenting and prototyping relaxed-simd proposal
(https://github.com/WebAssembly/relaxed-simd/).
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D110111
Files:
clang/include/clang/Driver/Options.td
clang/lib/Basic/Targets/WebAssembly.cpp
clang/lib/Basic/Targets/WebAssembly.h
clang/test/Preprocessor/wasm-target-features.c
Index: clang/test/Preprocessor/wasm-target-features.c
===================================================================
--- clang/test/Preprocessor/wasm-target-features.c
+++ clang/test/Preprocessor/wasm-target-features.c
@@ -7,6 +7,15 @@
//
// SIMD128:#define __wasm_simd128__ 1{{$}}
+// RUN: %clang -E -dM %s -o - 2>&1 \
+// RUN: -target wasm32-unknown-unknown -mrelaxed-simd \
+// RUN: | FileCheck %s -check-prefix=RELAXED-SIMD
+// RUN: %clang -E -dM %s -o - 2>&1 \
+// RUN: -target wasm64-unknown-unknown -mrelaxed-simd \
+// RUN: | FileCheck %s -check-prefix=RELAXED-SIMD
+//
+// RELAXED-SIMD:#define __wasm_relaxed_simd__ 1{{$}}
+
// RUN: %clang -E -dM %s -o - 2>&1 \
// RUN: -target wasm32-unknown-unknown -mnontrapping-fptoint \
// RUN: | FileCheck %s -check-prefix=NONTRAPPING-FPTOINT
Index: clang/lib/Basic/Targets/WebAssembly.h
===================================================================
--- clang/lib/Basic/Targets/WebAssembly.h
+++ clang/lib/Basic/Targets/WebAssembly.h
@@ -27,6 +27,7 @@
enum SIMDEnum {
NoSIMD,
SIMD128,
+ RelaxedSIMD,
} SIMDLevel = NoSIMD;
bool HasNontrappingFPToInt = false;
Index: clang/lib/Basic/Targets/WebAssembly.cpp
===================================================================
--- clang/lib/Basic/Targets/WebAssembly.cpp
+++ clang/lib/Basic/Targets/WebAssembly.cpp
@@ -46,6 +46,7 @@
bool WebAssemblyTargetInfo::hasFeature(StringRef Feature) const {
return llvm::StringSwitch<bool>(Feature)
.Case("simd128", SIMDLevel >= SIMD128)
+ .Case("relaxed-simd", SIMDLevel >= RelaxedSIMD)
.Case("nontrapping-fptoint", HasNontrappingFPToInt)
.Case("sign-ext", HasSignExt)
.Case("exception-handling", HasExceptionHandling)
@@ -72,6 +73,8 @@
defineCPUMacros(Builder, "wasm", /*Tuning=*/false);
if (SIMDLevel >= SIMD128)
Builder.defineMacro("__wasm_simd128__");
+ if (SIMDLevel >= RelaxedSIMD)
+ Builder.defineMacro("__wasm_relaxed_simd__");
if (HasNontrappingFPToInt)
Builder.defineMacro("__wasm_nontrapping_fptoint__");
if (HasSignExt)
@@ -99,6 +102,9 @@
case SIMD128:
Features["simd128"] = true;
LLVM_FALLTHROUGH;
+ case RelaxedSIMD:
+ Features["relaxed-simd"] = true;
+ LLVM_FALLTHROUGH;
case NoSIMD:
break;
}
@@ -109,6 +115,9 @@
case NoSIMD:
case SIMD128:
Features["simd128"] = false;
+ LLVM_FALLTHROUGH;
+ case RelaxedSIMD:
+ Features["relaxed-simd"] = false;
break;
}
}
@@ -118,6 +127,8 @@
bool Enabled) const {
if (Name == "simd128")
setSIMDLevel(Features, SIMD128, Enabled);
+ else if (Name == "relaxed-simd")
+ setSIMDLevel(Features, RelaxedSIMD, Enabled);
else
Features[Name] = Enabled;
}
@@ -149,6 +160,14 @@
SIMDLevel = std::min(SIMDLevel, SIMDEnum(SIMD128 - 1));
continue;
}
+ if (Feature == "+relaxed-simd") {
+ SIMDLevel = std::max(SIMDLevel, RelaxedSIMD);
+ continue;
+ }
+ if (Feature == "-relaxed-simd") {
+ SIMDLevel = std::min(SIMDLevel, SIMDEnum(RelaxedSIMD - 1));
+ continue;
+ }
if (Feature == "+nontrapping-fptoint") {
HasNontrappingFPToInt = true;
continue;
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3310,6 +3310,8 @@
def msimd128 : Flag<["-"], "msimd128">, Group<m_wasm_Features_Group>;
def mno_simd128 : Flag<["-"], "mno-simd128">, Group<m_wasm_Features_Group>;
+def mrelaxed_simd : Flag<["-"], "mrelaxed-simd">, Group<m_wasm_Features_Group>;
+def mno_relaxed_simd : Flag<["-"], "mno-relaxed-simd">, Group<m_wasm_Features_Group>;
def mnontrapping_fptoint : Flag<["-"], "mnontrapping-fptoint">, Group<m_wasm_Features_Group>;
def mno_nontrapping_fptoint : Flag<["-"], "mno-nontrapping-fptoint">, Group<m_wasm_Features_Group>;
def msign_ext : Flag<["-"], "msign-ext">, Group<m_wasm_Features_Group>;
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