From: Niels Möller <nisse@lysator.liu.se>
Date: Sat, 29 Mar 2025 15:20:32 +0000 (+0100)
Subject: ppc64: Comment fix and micro optimization of ghash_set_key.
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=99a9c92935f1476e5d7cedd237c9a013632a888e;p=thirdparty%2Fnettle.git

ppc64: Comment fix and micro optimization of ghash_set_key.
---

diff --git a/powerpc64/p8/ghash-set-key.asm b/powerpc64/p8/ghash-set-key.asm
index cda6f2e2..c3b8283a 100644
--- a/powerpc64/p8/ghash-set-key.asm
+++ b/powerpc64/p8/ghash-set-key.asm
@@ -98,7 +98,6 @@ IF_LE(`
     vxor           LE_MASK,LE_MASK,LE_TEMP       C 0x07060504030201000F0E0D0C0B0A0908
 ')
 
-    C 'H' is assigned by gcm_set_key() to the middle element of the table
     lxvd2x         VSR(H),0,KEY                  C load 'H'
     C byte-reverse of each doubleword permuting on little-endian mode
 IF_LE(`
@@ -188,11 +187,8 @@ IF_LE(`
     xxmrgld        VSR(H2L),VSR(H4),VSR(Hm2)
 
     C store H3M, H3L, H4M, H4L
-    li             r7,4*16
-    li             r8,5*16
-    li             r9,6*16
-    li             r10,7*16
-    stxvd2x        VSR(H1M),r7,CTX
+    addi           CTX, CTX, 0x40
+    stxvd2x        VSR(H1M),0,CTX
     stxvd2x        VSR(H1L),r8,CTX
     stxvd2x        VSR(H2M),r9,CTX
     stxvd2x        VSR(H2L),r10,CTX