From: Niels Möller <nisse@lysator.liu.se>
Date: Sat, 11 May 2024 18:47:00 +0000 (+0200)
Subject: Simplify early exit
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=fb8f701dc32f196e9ded40dfaa82697d8baf87d1;p=thirdparty%2Fnettle.git

Simplify early exit
---

diff --git a/powerpc64/p8/gcm-aes-encrypt.asm b/powerpc64/p8/gcm-aes-encrypt.asm
index f4a672c9..ef0afdbf 100644
--- a/powerpc64/p8/gcm-aes-encrypt.asm
+++ b/powerpc64/p8/gcm-aes-encrypt.asm
@@ -99,7 +99,8 @@ define(`LASTCNT', `v25')
 define(`FUNC_ALIGN', `5')
 PROLOGUE(_nettle_gcm_aes_encrypt)
     srdi. LOOP, SLEN, 7		C loop n 8 blocks
-    beq No_encrypt_out
+    sldi SLEN, LOOP, 7
+    beq end
 
     C 288 byte "protected zone" is sufficient for storage.
     stxv VSR(v20), -16(SP)
@@ -147,8 +148,6 @@ IF_LE(`
 
     lxvb16x VSR(S0), 0, HT		C Load 'CTR'
 
-    sldi SLEN, LOOP, 7
-
     addi LOOP, LOOP, -1
 
     lxvd2x VSR(K),r11,HT		C First subkey
@@ -412,12 +411,9 @@ IF_LE(`
     lxv VSR(v24), -80(SP)
     lxv VSR(v25), -96(SP)
 
+end:
     mr r3, SLEN
     blr
-
-No_encrypt_out:
-    li r3, 0
-    blr
 EPILOGUE(_nettle_gcm_aes_encrypt)
 
  .data