From: Niels Möller <nisse@lysator.liu.se>
Date: Sat, 7 Nov 2020 10:08:40 +0000 (+0100)
Subject: ppc: Comment instructions for chacha byte swapping.
X-Git-Tag: nettle_3.7rc1~53^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19ba206d46d8558bc3af6ab14f7a770a94df57b9;p=thirdparty%2Fnettle.git

ppc: Comment instructions for chacha byte swapping.
---

diff --git a/powerpc64/p7/chacha-core-internal.asm b/powerpc64/p7/chacha-core-internal.asm
index 80f0b3c1..6eb1066f 100644
--- a/powerpc64/p7/chacha-core-internal.asm
+++ b/powerpc64/p7/chacha-core-internal.asm
@@ -105,9 +105,9 @@ PROLOGUE(_nettle_chacha_core)
 	vspltisw ROT7, 7
 IF_BE(`
 	li	 r9, 0
-	lvsl	 LE_MASK, r9, r9
-	vspltisb LE_TEMP, 0x03
-	vxor	 LE_MASK, LE_MASK, LE_TEMP
+	lvsl	 LE_MASK, r9, r9		C 00 01 02 03 ... 0c 0d 0e 0f
+	vspltisb LE_TEMP, 0x03			C 03 03 03 03 ... 03 03 03 03
+	vxor	 LE_MASK, LE_MASK, LE_TEMP	C 03 02 01 00 ... 0f 0e 0d 0c
 ')
 
 	lxvw4x	VSR(X0), 0, SRC