ppc: Comment instructions for chacha byte swapping.

diff --git a/powerpc64/p7/chacha-core-internal.asm b/powerpc64/p7/chacha-core-internal.asm
index 80f0b3c1b087bdbf17199e56d0f5c3d47605b050..6eb1066f7288acb0867d9f5db48be0a30f82494d 100644 (file)
--- 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