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add WebPMemToInt32

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and use it with calls to _mm_cvtsi32_si128 and _mm_set_epi32; this calls
WebPMemToUint32, but corrects the type to avoid runtime warnings with
clang -fsanitize=integer of the form:

implicit conversion from type 'uint32_t' (aka 'unsigned int') of value
2155905152 (32-bit, unsigned) to type 'int' changed the value to
-2139062144 (32-bit, signed)

Bug: b/229626362
Change-Id: I50101ba2b46dfaa852f02d46830f3511c80b02d9
This commit is contained in:
James Zern
2022-07-28 19:33:44 -07:00
parent b4994eaa6d
commit 4f402f34a1
5 changed files with 25 additions and 20 deletions
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2
src/dsp/rescaler_sse2.c
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@ -132,7 +132,7 @@ static void RescalerImportRowShrink_SSE2(WebPRescaler* const wrk,
__m128i base = zero;
accum += wrk->x_add;
while (accum > 0) {
const __m128i A = _mm_cvtsi32_si128(WebPMemToUint32(src));
const __m128i A = _mm_cvtsi32_si128(WebPMemToInt32(src));
src += 4;
base = _mm_unpacklo_epi8(A, zero);
// To avoid overflow, we need: base * x_add / x_sub < 32768