[libc-commits] [libc] [libc] Fix _Float16 detection for x86 (PR #73947)

[Guillaume Chatelet via libc-commits]

https://github.com/gchatelet created https://github.com/llvm/llvm-project/pull/73947

None

>From 0a1a16342be877bfc663646cbadf2ca82a09a55f Mon Sep 17 00:00:00 2001
From: Guillaume Chatelet <gchatelet at google.com>
Date: Thu, 30 Nov 2023 14:50:55 +0000
Subject: [PATCH] [libc] Fix _Float16 detection for x86

---
 libc/src/__support/macros/properties/float.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libc/src/__support/macros/properties/float.h b/libc/src/__support/macros/properties/float.h
index 7e00ddc8f0cd327..4bafc3777a47146 100644
--- a/libc/src/__support/macros/properties/float.h
+++ b/libc/src/__support/macros/properties/float.h
@@ -13,6 +13,7 @@
 
 #include "src/__support/macros/properties/architectures.h"
 #include "src/__support/macros/properties/compiler.h"
+#include "src/__support/macros/properties/cpu_features.h"
 #include "src/__support/macros/properties/os.h"
 
 #include <float.h> // LDBL_MANT_DIG
@@ -30,7 +31,7 @@
 #endif
 
 // float16 support.
-#if defined(LIBC_TARGET_ARCH_IS_X86_64)
+#if defined(LIBC_TARGET_ARCH_IS_X86_64) && defined(LIBC_TARGET_CPU_HAS_SSE2)
 #if (defined(LIBC_COMPILER_CLANG_VER) && (LIBC_COMPILER_CLANG_VER >= 1500)) || \
     (defined(LIBC_COMPILER_GCC_VER) && (LIBC_COMPILER_GCC_VER >= 1201))
 #define LIBC_COMPILER_HAS_C23_FLOAT16