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highbd_inv_txfm_sse4: make << of neg. val a multiply

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left shifting a negative value is undefined; quiets a ubsan warning.
this is applied to a constant, no change in the generated code.

Change-Id: I595f0ff7904ef025e07bb80234293d958dc9f254
This commit is contained in:
James Zern 2017-07-30 12:48:28 -07:00
parent facb124941
commit 78155b7ed5
1 changed files with 1 additions and 1 deletions
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vpx_dsp/x86/highbd_inv_txfm_sse4.h
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@ -18,7 +18,7 @@
static INLINE __m128i multiplication_round_shift_sse4_1(
const __m128i *const in /*in[2]*/, const int c) {
const __m128i pair_c = pair_set_epi32(c << 2, 0);
const __m128i pair_c = pair_set_epi32(c * 4, 0);
__m128i t0, t1;
t0 = _mm_mul_epi32(in[0], pair_c);