From: Pavel P <pavlov.pavel@gmail.com>
Date: Sat, 18 Jan 2025 21:27:19 +0000 (+0200)
Subject: handle 32bit size_t when building for x64
X-Git-Tag: v1.5.7^2~29^2~3
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=936927a427704ca21dfd07c666c4123737c8fb03;p=thirdparty%2Fzstd.git

handle 32bit size_t when building for x64
---

diff --git a/lib/common/bitstream.h b/lib/common/bitstream.h
index c9c645416..c0db11d40 100644
--- a/lib/common/bitstream.h
+++ b/lib/common/bitstream.h
@@ -162,11 +162,11 @@ MEM_STATIC size_t BIT_initCStream(BIT_CStream_t* bitC,
 FORCE_INLINE_TEMPLATE size_t BIT_getLowerBits(size_t bitContainer, U32 const nbBits)
 {
 #if defined(STATIC_BMI2) && STATIC_BMI2 == 1 && !defined(ZSTD_NO_INTRINSICS)
-#if defined(__x86_64__) || defined(_M_X64)
-    return _bzhi_u64(bitContainer, nbBits);
-#else
+#  if defined(__x86_64__) || defined(_M_X64)
+    return sizeof(size_t) == sizeof(U64) ? _bzhi_u64(bitContainer, nbBits) : _bzhi_u32((U32)bitContainer, nbBits);
+#  else
     return _bzhi_u32(bitContainer, nbBits);
-#endif
+#  endif
 #else
     assert(nbBits < BIT_MASK_SIZE);
     return bitContainer & BIT_mask[nbBits];