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fix some 'unsigned integer overflow' warnings in ubsan

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I couldn't find a safe way of fixing VP8GetSigned() so i just
used the big-hammer.

Change-Id: I1039bc00307d1c90c85909a458a4bc70670e48b7
This commit is contained in:
skal
2016-08-16 15:02:43 -07:00
committed by James Zern
parent 8a4ebc6ab0
commit 6ab496ed22
11 changed files with 56 additions and 42 deletions
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8
src/enc/backward_references.c
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@ -211,13 +211,13 @@ void VP8LHashChainClear(VP8LHashChain* const p) {
// -----------------------------------------------------------------------------
#define HASH_MULTIPLIER_HI (0xc6a4a793U)
#define HASH_MULTIPLIER_LO (0x5bd1e996U)
#define HASH_MULTIPLIER_HI (0xc6a4a793ULL)
#define HASH_MULTIPLIER_LO (0x5bd1e996ULL)
static WEBP_INLINE uint32_t GetPixPairHash64(const uint32_t* const argb) {
uint32_t key;
key = argb[1] * HASH_MULTIPLIER_HI;
key += argb[0] * HASH_MULTIPLIER_LO;
key = (argb[1] * HASH_MULTIPLIER_HI) & 0xffffffffu;
key += (argb[0] * HASH_MULTIPLIER_LO) & 0xffffffffu;
key = key >> (32 - HASH_BITS);
return key;
}