550     const U32   prefixStartIndex = (dictLimit > lowLimit) ? dictLimit : lowLimit;  in ZSTD_compressBlock_doubleFast_extDict_generic()  local
551     const BYTE* const prefixStart = base + prefixStartIndex;  in ZSTD_compressBlock_doubleFast_extDict_generic()
554     const BYTE* const dictEnd = dictBase + prefixStartIndex;  in ZSTD_compressBlock_doubleFast_extDict_generic()
560     if (prefixStartIndex == dictStartIndex)  in ZSTD_compressBlock_doubleFast_extDict_generic()
567         const BYTE* const matchBase = matchIndex < prefixStartIndex ? dictBase : base;  in ZSTD_compressBlock_doubleFast_extDict_generic()
572         const BYTE* const matchLongBase = matchLongIndex < prefixStartIndex ? dictBase : base;  in ZSTD_compressBlock_doubleFast_extDict_generic()
577         const BYTE* const repBase = repIndex < prefixStartIndex ? dictBase : base;  in ZSTD_compressBlock_doubleFast_extDict_generic()
582 …if ((((U32)((prefixStartIndex-1) - repIndex) >= 3) /* intentional underflow : ensure repIndex does…  in ZSTD_compressBlock_doubleFast_extDict_generic()
585             const BYTE* repMatchEnd = repIndex < prefixStartIndex ? dictEnd : iend;  in ZSTD_compressBlock_doubleFast_extDict_generic()
591                 const BYTE* const matchEnd = matchLongIndex < prefixStartIndex ? dictEnd : iend;  in ZSTD_compressBlock_doubleFast_extDict_generic()
592 …       const BYTE* const lowMatchPtr = matchLongIndex < prefixStartIndex ? dictStart : prefixStart;  in ZSTD_compressBlock_doubleFast_extDict_generic()
604                 const BYTE* const match3Base = matchIndex3 < prefixStartIndex ? dictBase : base;  in ZSTD_compressBlock_doubleFast_extDict_generic()
609                     const BYTE* const matchEnd = matchIndex3 < prefixStartIndex ? dictEnd : iend;  in ZSTD_compressBlock_doubleFast_extDict_generic()
610 …          const BYTE* const lowMatchPtr = matchIndex3 < prefixStartIndex ? dictStart : prefixStart;  in ZSTD_compressBlock_doubleFast_extDict_generic()
616                     const BYTE* const matchEnd = matchIndex < prefixStartIndex ? dictEnd : iend;  in ZSTD_compressBlock_doubleFast_extDict_generic()
617 …           const BYTE* const lowMatchPtr = matchIndex < prefixStartIndex ? dictStart : prefixStart;  in ZSTD_compressBlock_doubleFast_extDict_generic()
649 …    const BYTE* repMatch2 = repIndex2 < prefixStartIndex ? dictBase + repIndex2 : base + repIndex2;  in ZSTD_compressBlock_doubleFast_extDict_generic()
650 …if ( (((U32)((prefixStartIndex-1) - repIndex2) >= 3)   /* intentional overflow : ensure repIndex2 …  in ZSTD_compressBlock_doubleFast_extDict_generic()
653                     const BYTE* const repEnd2 = repIndex2 < prefixStartIndex ? dictEnd : iend;  in ZSTD_compressBlock_doubleFast_extDict_generic()