haraldwolff/llama.cpp
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Fix potential int8 overflow in non-SIMD vec_dot (#986)

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Stephan Walter 2023-04-15 18:28:56 +00:00 committed by GitHub
parent 0ad964631f
commit 2f7c8e014e
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1 changed files with 4 additions and 4 deletions
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ggml.c
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@ -2373,11 +2373,11 @@ static void ggml_vec_dot_q4_0(const int n, float * restrict s, const void * rest
const uint8_t v0 = p0[j];
const uint8_t v1 = p1[j];
const int8_t i0 = (int8_t) (v0 & 0xf) - 8;
const int8_t i1 = (int8_t) (v0 >> 4) - 8;
const int i0 = (v0 & 0xf) - 8;
const int i1 = (v0 >> 4) - 8;
const int8_t i2 = (int8_t) (v1 & 0xf) - 8;
const int8_t i3 = (int8_t) (v1 >> 4) - 8;
const int i2 = (v1 & 0xf) - 8;
const int i3 = (v1 >> 4) - 8;
sumi += i0*i2 + i1*i3;
}