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https://github.com/tukaani-project/xz/commit/0673c9ec98b6bae12b33dc295564514aaa26e2fc
From 0673c9ec98b6bae12b33dc295564514aaa26e2fc Mon Sep 17 00:00:00 2001
From: Lasse Collin <lasse.collin@tukaani.org>
Date: Sun, 19 Mar 2023 22:45:59 +0200
Subject: [PATCH] liblzma: Silence -Wsign-conversion in SSE2 code in
memcmplen.h.
Thanks to Christian Hesse for reporting the issue.
Fixes: https://github.com/tukaani-project/xz/issues/44
--- a/src/liblzma/common/memcmplen.h
+++ b/src/liblzma/common/memcmplen.h
@@ -89,7 +89,8 @@ lzma_memcmplen(const uint8_t *buf1, const uint8_t *buf2,
// version isn't used on x86-64.
# define LZMA_MEMCMPLEN_EXTRA 16
while (len < limit) {
- const uint32_t x = 0xFFFF ^ _mm_movemask_epi8(_mm_cmpeq_epi8(
+ const uint32_t x = 0xFFFF ^ (uint32_t)_mm_movemask_epi8(
+ _mm_cmpeq_epi8(
_mm_loadu_si128((const __m128i *)(buf1 + len)),
_mm_loadu_si128((const __m128i *)(buf2 + len))));
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