From: Niels Möller <nisse@lysator.liu.se>
Date: Sat, 13 Apr 2024 09:08:35 +0000 (+0200)
Subject: ppc64: Fix big-endian case of byte swapping for gcm-aes.
X-Git-Tag: nettle_3.10rc1~16^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f08843c5ce5f310399dcd9e50cd4457c111c3c18;p=thirdparty%2Fnettle.git

ppc64: Fix big-endian case of byte swapping for gcm-aes.
---

diff --git a/powerpc64/p8/gcm-aes-decrypt.asm b/powerpc64/p8/gcm-aes-decrypt.asm
index 403cee54..e4064984 100644
--- a/powerpc64/p8/gcm-aes-decrypt.asm
+++ b/powerpc64/p8/gcm-aes-decrypt.asm
@@ -152,12 +152,13 @@ PROLOGUE(_nettle_gcm_aes_decrypt)
     vsldoi CNT1, ZERO, TEMP1, 1    C counter 1
 
     DATA_LOAD_VEC(POLY,.polynomial,r9)
-IF_LE(`
+
     li             r9,0
     lvsl           LE_MASK,0,r9
-    vspltisb       LE_TEMP,0x07
+IF_LE(`vspltisb    LE_TEMP,0x07')
+IF_BE(`vspltisb    LE_TEMP,0x03')
     vxor           LE_MASK,LE_MASK,LE_TEMP
-')
+
     xxmrghd        VSR(POLY_L),VSR(ZERO),VSR(POLY)
 
     addi X, r12, 32
diff --git a/powerpc64/p8/gcm-aes-encrypt.asm b/powerpc64/p8/gcm-aes-encrypt.asm
index 68ef1360..8702f1f3 100644
--- a/powerpc64/p8/gcm-aes-encrypt.asm
+++ b/powerpc64/p8/gcm-aes-encrypt.asm
@@ -152,12 +152,13 @@ PROLOGUE(_nettle_gcm_aes_encrypt)
     vsldoi CNT1, ZERO, TEMP1, 1    C counter 1
 
     DATA_LOAD_VEC(POLY,.polynomial,r9)
-IF_LE(`
+
     li             r9,0
     lvsl           LE_MASK,0,r9
-    vspltisb       LE_TEMP,0x07
+IF_LE(`vspltisb    LE_TEMP,0x07')
+IF_BE(`vspltisb    LE_TEMP,0x03')
     vxor           LE_MASK,LE_MASK,LE_TEMP
-')
+
     xxmrghd        VSR(POLY_L),VSR(ZERO),VSR(POLY)
 
     addi X, r12, 32