From f88cefad27a1737c76e09d99c9fb43e173506081 Mon Sep 17 00:00:00 2001 From: Miodrag Milanovic Date: Sun, 13 Sep 2015 08:41:44 +0200 Subject: Move all devices into separate part of src tree (nw) --- src/devices/cpu/rsp/vabs.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 src/devices/cpu/rsp/vabs.h (limited to 'src/devices/cpu/rsp/vabs.h') diff --git a/src/devices/cpu/rsp/vabs.h b/src/devices/cpu/rsp/vabs.h new file mode 100644 index 00000000000..273841b9610 --- /dev/null +++ b/src/devices/cpu/rsp/vabs.h @@ -0,0 +1,15 @@ +// 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); +} -- cgit v1.2.3-70-g09d2