From: Mika Lindqvist <postmaster@raasu.org>
Date: Sun, 25 Feb 2024 14:42:43 +0000 (+0200)
Subject: [ARM] Override Clang x4 NEON intrinsics for Android
X-Git-Tag: 2.2.0~46
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af494fc34f01878133806af7ad52f4e14f61c460;p=thirdparty%2Fzlib-ng.git

[ARM] Override Clang x4 NEON intrinsics for Android
* Clang for Android requires 256-bit alignment for x4 loads and stores, which can't be guaranteed and is unnecessary
---

diff --git a/arch/arm/neon_intrins.h b/arch/arm/neon_intrins.h
index 51df77db..a9e99ec8 100644
--- a/arch/arm/neon_intrins.h
+++ b/arch/arm/neon_intrins.h
@@ -25,6 +25,13 @@
     out.val[3] = vqsubq_u16(a.val[3], b); \
 } while (0)
 
+#  if defined(__clang__) && defined(__arm__) && defined(__ANDROID__)
+/* Clang for 32-bit Android has too strict alignment requirement (:256) for x4 NEON intrinsics */
+#    undef ARM_NEON_HASLD4
+#    undef vld1q_u16_x4
+#    undef vld1q_u8_x4
+#    undef vst1q_u16_x4
+#  endif
 
 #  ifndef ARM_NEON_HASLD4