From d5989dc15e225c6e3824863e748eea79bb6c5ecf Mon Sep 17 00:00:00 2001
From: Sean Parkinson <sean@wolfssl.com>
Date: Mon, 7 Mar 2022 08:49:28 +1000
Subject: [PATCH] SipHash: Replace gcc specific ASM instruction with generic

clang would not compile movxzb.
Replaced with movzbq.
---
 wolfcrypt/src/siphash.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/wolfcrypt/src/siphash.c b/wolfcrypt/src/siphash.c
index 24c327ec5..15d85d616 100644
--- a/wolfcrypt/src/siphash.c
+++ b/wolfcrypt/src/siphash.c
@@ -453,21 +453,21 @@ int wc_SipHash(const unsigned char* key, const unsigned char* in, word32 inSz,
 
         "cmp    $7, %[inSz]\n\t"
         "jl     L_siphash_n7\n\t"
-        "movzxb 6(%[in]), %%r12\n\t"
+        "movzbq 6(%[in]), %%r12\n\t"
         "shlq   $48, %%r12\n\t"
         "orq    %%r12, %%r13\n\t"
         "L_siphash_n7:\n\t"
 
         "cmp    $6, %[inSz]\n\t"
         "jl     L_siphash_n6\n\t"
-        "movzxb 5(%[in]), %%r12\n\t"
+        "movzbq 5(%[in]), %%r12\n\t"
         "shlq   $40, %%r12\n\t"
         "orq    %%r12, %%r13\n\t"
         "L_siphash_n6:\n\t"
 
         "cmp    $5, %[inSz]\n\t"
         "jl     L_siphash_n5\n\t"
-        "movzxb 4(%[in]), %%r12\n\t"
+        "movzbq 4(%[in]), %%r12\n\t"
         "shlq   $32, %%r12\n\t"
         "orq    %%r12, %%r13\n\t"
         "L_siphash_n5:\n\t"
@@ -483,7 +483,7 @@ int wc_SipHash(const unsigned char* key, const unsigned char* in, word32 inSz,
 
         "cmp    $3, %[inSz]\n\t"
         "jl     L_siphash_n3\n\t"
-        "movzxb 2(%[in]), %%r12\n\t"
+        "movzbq 2(%[in]), %%r12\n\t"
         "shlq   $16, %%r12\n\t"
         "orq    %%r12, %%r13\n\t"
         "L_siphash_n3:\n\t"