1 files changed, 37 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/power8/chacha20_arch.h b/sysdeps/powerpc/powerpc64/power8/chacha20_arch.h
new file mode 100644
index 0000000000..ded06762b6
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/chacha20_arch.h
@@ -0,0 +1,37 @@
+/* PowerPC optimization for ChaCha20.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdbool.h>
+#include <ldsodefs.h>
+
+unsigned int __chacha20_power8_blocks4 (uint32_t *state, uint8_t *dst,
+					const uint8_t *src, size_t nblks)
+     attribute_hidden;
+
+static void
+chacha20_crypt (uint32_t *state, uint8_t *dst,
+		const uint8_t *src, size_t bytes)
+{
+  _Static_assert (CHACHA20_BUFSIZE % 4 == 0,
+		  "CHACHA20_BUFSIZE not multiple of 4");
+  _Static_assert (CHACHA20_BUFSIZE >= CHACHA20_BLOCK_SIZE * 4,
+		  "CHACHA20_BUFSIZE < CHACHA20_BLOCK_SIZE * 4");
+
+  __chacha20_power8_blocks4 (state, dst, src,
+			     CHACHA20_BUFSIZE / CHACHA20_BLOCK_SIZE);
+}