[clang] [Clang][AArch64]Add FP8 ACLE macros implementation (PR #140591)
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Mon May 19 11:36:04 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-aarch64
Author: None (CarolineConcatto)
<details>
<summary>Changes</summary>
This patch implements the macros described in the ACLE[1]
[1] https://github.com/ARM-software/acle/blob/main/main/acle.md#modal-8-bit-floating-point-extensions
---
Full diff: https://github.com/llvm/llvm-project/pull/140591.diff
3 Files Affected:
- (modified) clang/lib/Basic/Targets/AArch64.cpp (+59)
- (modified) clang/lib/Basic/Targets/AArch64.h (+9)
- (modified) clang/test/Preprocessor/aarch64-target-features.c (+31)
``````````diff
diff --git a/clang/lib/Basic/Targets/AArch64.cpp b/clang/lib/Basic/Targets/AArch64.cpp
index e1f6c7b834dc7..7267b17704a41 100644
--- a/clang/lib/Basic/Targets/AArch64.cpp
+++ b/clang/lib/Basic/Targets/AArch64.cpp
@@ -596,6 +596,33 @@ void AArch64TargetInfo::getTargetDefines(const LangOptions &Opts,
if (HasSMEB16B16)
Builder.defineMacro("__ARM_FEATURE_SME_B16B16", "1");
+ if (HasFP8)
+ Builder.defineMacro("__ARM_FEATURE_FP8", "1");
+
+ if (HasFP8FMA)
+ Builder.defineMacro("__ARM_FEATURE_FP8FMA", "1");
+
+ if (HasFP8DOT2)
+ Builder.defineMacro("__ARM_FEATURE_FP8DOT2", "1");
+
+ if (HasFP8DOT4)
+ Builder.defineMacro("__ARM_FEATURE_FP8DOT4", "1");
+
+ if (HasSSVE_FP8DOT2)
+ Builder.defineMacro("__ARM_FEATURE_SSVE_FP8DOT2", "1");
+
+ if (HasSSVE_FP8DOT4)
+ Builder.defineMacro("__ARM_FEATURE_SSVE_FP8DOT4", "1");
+
+ if (HasSSVE_FP8FMA)
+ Builder.defineMacro("__ARM_FEATURE_SSVE_FP8FMA", "1");
+
+ if (HasSME_F8F32)
+ Builder.defineMacro("__ARM_FEATURE_SME_F8F32", "1");
+
+ if (HasSME_F8F16)
+ Builder.defineMacro("__ARM_FEATURE_SME_F8F16", "1");
+
if (HasCRC)
Builder.defineMacro("__ARM_FEATURE_CRC32", "1");
@@ -885,6 +912,15 @@ bool AArch64TargetInfo::hasFeature(StringRef Feature) const {
.Cases("ls64", "ls64_v", "ls64_accdata", HasLS64)
.Case("wfxt", HasWFxT)
.Case("rcpc3", HasRCPC3)
+ .Case("fp8", HasFP8)
+ .Case("fp8fma", HasFP8FMA)
+ .Case("fp8dot2", HasFP8DOT2)
+ .Case("fp8dot4", HasFP8DOT4)
+ .Case("ssve-fp8dot2", HasSSVE_FP8DOT2)
+ .Case("ssve-fp8dot4", HasSSVE_FP8DOT4)
+ .Case("ssve-fp8fma", HasSSVE_FP8FMA)
+ .Case("sme-f8f32", HasSME_F8F32)
+ .Case("sme-f8f16", HasSME_F8F16)
.Default(false);
}
@@ -1046,6 +1082,29 @@ bool AArch64TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
HasSVEB16B16 = true;
HasSMEB16B16 = true;
}
+
+ if (Feature == "+fp8")
+ HasFP8 = true;
+ if (Feature == "+fp8fma")
+ HasFP8FMA = true;
+ if (Feature == "+fp8dot2")
+ HasFP8DOT2 = true;
+ if (Feature == "+fp8dot4")
+ HasFP8DOT4 = true;
+ if (Feature == "+ssve-fp8dot2")
+ HasSSVE_FP8DOT2 = true;
+ if (Feature == "+ssve-fp8dot4")
+ HasSSVE_FP8DOT4 = true;
+ if (Feature == "+ssve-fp8fma")
+ HasSSVE_FP8FMA = true;
+ if (Feature == "+sme-f8f32") {
+ HasSME2 = true;
+ HasSME_F8F32 = true;
+ }
+ if (Feature == "+sme-f8f16") {
+ HasSME2 = true;
+ HasSME_F8F16 = true;
+ }
if (Feature == "+sb")
HasSB = true;
if (Feature == "+predres")
diff --git a/clang/lib/Basic/Targets/AArch64.h b/clang/lib/Basic/Targets/AArch64.h
index 6eeac69af20df..7230f22d5bb86 100644
--- a/clang/lib/Basic/Targets/AArch64.h
+++ b/clang/lib/Basic/Targets/AArch64.h
@@ -106,6 +106,15 @@ class LLVM_LIBRARY_VISIBILITY AArch64TargetInfo : public TargetInfo {
bool HasSMEF16F16 = false;
bool HasSMEB16B16 = false;
bool HasSME2p1 = false;
+ bool HasFP8 = false;
+ bool HasFP8FMA = false;
+ bool HasFP8DOT2 = false;
+ bool HasFP8DOT4 = false;
+ bool HasSSVE_FP8DOT2 = false;
+ bool HasSSVE_FP8DOT4 = false;
+ bool HasSSVE_FP8FMA = false;
+ bool HasSME_F8F32 = false;
+ bool HasSME_F8F16 = false;
bool HasSB = false;
bool HasPredRes = false;
bool HasSSBS = false;
diff --git a/clang/test/Preprocessor/aarch64-target-features.c b/clang/test/Preprocessor/aarch64-target-features.c
index 3f801c4344940..52045d216262f 100644
--- a/clang/test/Preprocessor/aarch64-target-features.c
+++ b/clang/test/Preprocessor/aarch64-target-features.c
@@ -744,3 +744,34 @@
// CHECK-SMEB16B16: __ARM_FEATURE_SME2 1
// CHECK-SMEB16B16: __ARM_FEATURE_SME_B16B16 1
// CHECK-SMEB16B16: __ARM_FEATURE_SVE_B16B16 1
+//
+// RUN: %clang --target=aarch64 -march=armv9-a+fp8 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FP8 %s
+// CHECK-FP8: __ARM_FEATURE_FP8 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+fp8fma -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FP8FMA %s
+// CHECK-FP8FMA: __ARM_FEATURE_FP8FMA 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+fp8dot2 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FP8DOT2 %s
+// CHECK-FP8DOT2: __ARM_FEATURE_FP8DOT2 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+fp8dot4 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FP8DOT4 %s
+// CHECK-FP8DOT4: __ARM_FEATURE_FP8DOT4 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+ssve-fp8dot2 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SSVE-FP8DOT2 %s
+// CHECK-SSVE-FP8DOT2: __ARM_FEATURE_SSVE_FP8DOT2 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+ssve-fp8dot4 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SSVE-FP8DOT4 %s
+// CHECK-SSVE-FP8DOT4: __ARM_FEATURE_SSVE_FP8DOT4 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+ssve-fp8fma -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SSVE-FP8FMA %s
+// CHECK-SSVE-FP8FMA: __ARM_FEATURE_SSVE_FP8FMA 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+sme-f8f32 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SMEF8F32 %s
+// CHECK-SMEF8F32: __ARM_FEATURE_LOCALLY_STREAMING 1
+// CHECK-SMEF8F32: __ARM_FEATURE_SME2 1
+// CHECK-SMEF8F32: __ARM_FEATURE_SME_F8F32 1
+
+// RUN: %clang --target=aarch64 -march=armv9-a+sme-f8f16 -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SMEF8F16 %s
+// CHECK-SMEF8F16: __ARM_FEATURE_LOCALLY_STREAMING 1
+// CHECK-SMEF8F16: __ARM_FEATURE_SME2 1
+// CHECK-SMEF8F16: __ARM_FEATURE_SME_F8F16 1
``````````
</details>
https://github.com/llvm/llvm-project/pull/140591
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