[llvm-branch-commits] [clang] e6e5974 - [Hexagon] Define __HVX_IEEE_FP__ when -mhvx-ieee-fp is enabled (#183829)

[Cullen Rhodes via llvm-branch-commits]

Author: Ankit Aggarwal
Date: 2026-04-01T08:46:45Z
New Revision: e6e59749af18a719660402199201eb047c104ca1

URL: https://github.com/llvm/llvm-project/commit/e6e59749af18a719660402199201eb047c104ca1
DIFF: https://github.com/llvm/llvm-project/commit/e6e59749af18a719660402199201eb047c104ca1.diff

LOG: [Hexagon] Define __HVX_IEEE_FP__ when -mhvx-ieee-fp is enabled (#183829)

Add a __HVX_IEEE_FP__ define when the compiler is invoked with
-mhvx-ieee-fp flag

Added: 
    

Modified: 
    clang/lib/Basic/Targets/Hexagon.cpp
    clang/lib/Basic/Targets/Hexagon.h
    clang/test/Preprocessor/hexagon-predefines.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/Hexagon.cpp b/clang/lib/Basic/Targets/Hexagon.cpp
index bd70bfe4fef51..9bf34e67a03fd 100644
--- a/clang/lib/Basic/Targets/Hexagon.cpp
+++ b/clang/lib/Basic/Targets/Hexagon.cpp
@@ -102,6 +102,9 @@ void HexagonTargetInfo::getTargetDefines(const LangOptions &Opts,
       Builder.defineMacro("__HVXDBL__");
   }
 
+  if (HasHVXIeeeFp)
+    Builder.defineMacro("__HVX_IEEE_FP__");
+
   if (hasFeature("audio")) {
     Builder.defineMacro("__HEXAGON_AUDIO__");
   }
@@ -148,6 +151,8 @@ bool HexagonTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
       UseLongCalls = true;
     else if (F == "-long-calls")
       UseLongCalls = false;
+    else if (F == "+hvx-ieee-fp")
+      HasHVXIeeeFp = true;
     else if (F == "+audio")
       HasAudio = true;
   }
@@ -242,6 +247,7 @@ bool HexagonTargetInfo::hasFeature(StringRef Feature) const {
       .Case("hvx", HasHVX)
       .Case("hvx-length64b", HasHVX64B)
       .Case("hvx-length128b", HasHVX128B)
+      .Case("hvx-ieee-fp", HasHVXIeeeFp)
       .Case("long-calls", UseLongCalls)
       .Case("audio", HasAudio)
       .Default(false);

diff  --git a/clang/lib/Basic/Targets/Hexagon.h b/clang/lib/Basic/Targets/Hexagon.h
index 21da0fc4cbdd0..f034911d77b92 100644
--- a/clang/lib/Basic/Targets/Hexagon.h
+++ b/clang/lib/Basic/Targets/Hexagon.h
@@ -32,6 +32,7 @@ class LLVM_LIBRARY_VISIBILITY HexagonTargetInfo : public TargetInfo {
   bool HasHVX = false;
   bool HasHVX64B = false;
   bool HasHVX128B = false;
+  bool HasHVXIeeeFp = false;
   bool HasAudio = false;
   bool UseLongCalls = false;
 

diff  --git a/clang/test/Preprocessor/hexagon-predefines.c b/clang/test/Preprocessor/hexagon-predefines.c
index bdedcf45ab118..4079f521580a8 100644
--- a/clang/test/Preprocessor/hexagon-predefines.c
+++ b/clang/test/Preprocessor/hexagon-predefines.c
@@ -105,8 +105,21 @@
 // CHECK-V68HVX-128B: #define __HVX_ARCH__ 68
 // CHECK-V68HVX-128B: #define __HVX_LENGTH__ 128
 // CHECK-V68HVX-128B: #define __HVX__ 1
+// CHECK-V68HVX-128B-NOT: #define __HVX_IEEE_FP__ 1
 // CHECK-V68HVX-128B: #define __hexagon__ 1
 
+// RUN: %clang_cc1 -E -dM -triple hexagon-unknown-elf -target-cpu hexagonv68 \
+// RUN: -target-feature +hvxv68 -target-feature +hvx-length128b \
+// RUN: -target-feature +hvx-ieee-fp %s | FileCheck \
+// RUN: %s -check-prefix CHECK-V68HVX-IEEE-FP
+// CHECK-V68HVX-IEEE-FP: #define __HEXAGON_ARCH__ 68
+// CHECK-V68HVX-IEEE-FP: #define __HEXAGON_V68__ 1
+// CHECK-V68HVX-IEEE-FP: #define __HVX_ARCH__ 68
+// CHECK-V68HVX-IEEE-FP: #define __HVX_IEEE_FP__ 1
+// CHECK-V68HVX-IEEE-FP: #define __HVX_LENGTH__ 128
+// CHECK-V68HVX-IEEE-FP: #define __HVX__ 1
+// CHECK-V68HVX-IEEE-FP: #define __hexagon__ 1
+
 // RUN: %clang_cc1 -E -dM -triple hexagon-unknown-elf -target-cpu hexagonv69 \
 // RUN: -target-feature +hvxv69 -target-feature +hvx-length128b %s | FileCheck \
 // RUN: %s -check-prefix CHECK-V69HVX-128B