Add 'neozip/' from commit 'c2712b8a345191f6ed79558c089777df94590087'

git-subtree-dir: neozip
git-subtree-mainline: b1e34e861b5d732afe828d58aad2c638135061fd
git-subtree-split: c2712b8a345191f6ed79558c089777df94590087

1 files changed, 61 insertions, 0 deletions

diff --git a/neozip/arch/power/power_intrins.h b/neozip/arch/power/power_intrins.h
new file mode 100644
index 0000000000..3efcfb9722
--- /dev/null
+++ b/neozip/arch/power/power_intrins.h
@@ -0,0 +1,61 @@
+/* Helper functions to work around issues with clang builtins
+ * Copyright (C) 2021 IBM Corporation
+ *
+ * Authors:
+ *   Daniel Black <daniel@linux.vnet.ibm.com>
+ *   Rogerio Alves <rogealve@br.ibm.com>
+ *   Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
+ *
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifndef POWER_INTRINS_H
+#define POWER_INTRINS_H
+
+#include <altivec.h>
+
+#if defined (__clang__)
+/*
+ * These stubs fix clang incompatibilities with GCC builtins.
+ */
+
+#ifndef __builtin_crypto_vpmsumw
+#define __builtin_crypto_vpmsumw __builtin_crypto_vpmsumb
+#endif
+#ifndef __builtin_crypto_vpmsumd
+#define __builtin_crypto_vpmsumd __builtin_crypto_vpmsumb
+#endif
+
+#ifdef __VSX__
+static inline __vector unsigned long long __attribute__((overloadable))
+vec_ld(int __a, const __vector unsigned long long* __b) {
+    return (__vector unsigned long long)__builtin_altivec_lvx(__a, __b);
+}
+#endif
+
+#endif
+
+/* There's no version of this that operates over unsigned and if casted, it does
+ * sign extension. Let's write an endian independent version and hope the compiler
+ * eliminates creating another zero idiom for the zero value if one exists locally */
+static inline vector unsigned short vec_unpackl(vector unsigned char a) {
+    vector unsigned char zero = vec_splat_u8(0);
+
+#if BYTE_ORDER == BIG_ENDIAN
+    return (vector unsigned short)vec_mergel(zero, a);
+#else
+    return (vector unsigned short)vec_mergel(a, zero);
+#endif
+}
+
+static inline vector unsigned short vec_unpackh(vector unsigned char a) {
+    vector unsigned char zero = vec_splat_u8(0);
+
+#if BYTE_ORDER == BIG_ENDIAN
+    return (vector unsigned short)vec_mergeh(zero, a);
+#else
+    return (vector unsigned short)vec_mergeh(a, zero);
+#endif
+}
+
+#endif