From: Yury Khrustalev <yury.khrustalev@arm.com>
Date: Thu, 14 Nov 2024 16:15:05 +0000 (+0000)
Subject: aarch64: Add ACLE __chkfeat intrinsic
X-Git-Tag: basepoints/gcc-16~4292
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=68d8a00bdad3204f3909f5a6c01903f8f1bfdef5;p=thirdparty%2Fgcc.git

aarch64: Add ACLE __chkfeat intrinsic

Note that compared to __builtin_aarch64_chkfeat (x) the ACLE __chkfeat(x)
flips the bits to be more intuitive (xor the input to output).

gcc/ChangeLog:
	* config/aarch64/arm_acle.h (__chkfeat): New.
---

diff --git a/gcc/config/aarch64/arm_acle.h b/gcc/config/aarch64/arm_acle.h
index ab4e7e60e046..ca9aabf8ebb9 100644
--- a/gcc/config/aarch64/arm_acle.h
+++ b/gcc/config/aarch64/arm_acle.h
@@ -190,8 +190,21 @@ __rint64x (double __a)
 
 #pragma GCC pop_options
 
+
 #pragma GCC push_options
+#pragma GCC target ("+nothing")
+
+__extension__ extern __inline uint64_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+__chkfeat (uint64_t __feat)
+{
+  return __builtin_aarch64_chkfeat (__feat) ^ __feat;
+}
 
+#pragma GCC pop_options
+
+
+#pragma GCC push_options
 #pragma GCC target ("+nothing+crc")
 
 __extension__ extern __inline uint32_t