// license:BSD-3-Clause // copyright-holders:Tyler J. Stachecki,Ryan Holtz inline rsp_vec_t vec_vabs(rsp_vec_t vs, rsp_vec_t vt, rsp_vec_t zero, rsp_vec_t *acc_lo) { rsp_vec_t vs_zero = _mm_cmpeq_epi16(vs, zero); rsp_vec_t sign_lt = _mm_srai_epi16(vs, 15); rsp_vec_t vd = _mm_andnot_si128(vs_zero, vt); // Careful: if VT = 0x8000 and VS is negative, // acc_lo will be 0x8000 but vd will be 0x7FFF. vd = _mm_xor_si128(vd, sign_lt); *acc_lo = _mm_sub_epi16(vd, sign_lt); return _mm_subs_epi16(vd, sign_lt); }