66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/******************************************************************************\
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* Authors: Iconoclast *
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* Release: 2013.11.26 *
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* License: CC0 Public Domain Dedication *
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* *
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* To the extent possible under law, the author(s) have dedicated all copyright *
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* and related and neighboring rights to this software to the public domain *
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* worldwide. This software is distributed without any warranty. *
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* *
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* You should have received a copy of the CC0 Public Domain Dedication along *
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* with this software. *
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* If not, see <http://creativecommons.org/publicdomain/zero/1.0/>. *
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\******************************************************************************/
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#include "vu.h"
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INLINE static void set_co(usf_state_t * state, short* VD, short* VS, short* VT)
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{ /* set CARRY and carry out from sum */
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#ifdef ARCH_MIN_ARM_NEON
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uint16x4_t vs_low = vld1_u16((const uint16_t*)VS);
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uint16x4_t vs_high = vld1_u16((const uint16_t*)VS+4);
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uint16x4_t vt_low = vld1_u16((const uint16_t*)VT);
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uint16x4_t vt_high = vld1_u16((const uint16_t*)VT+4);
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uint32x4_t zero = vdupq_n_u32(0);
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uint32x4_t v_l = vaddl_u16(vs_low, vt_low);
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uint32x4_t v_h = vaddl_u16(vs_high, vt_high);
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uint16x4_t vl16 = vaddhn_u32(v_l,zero);
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uint16x4_t vh16 = vaddhn_u32(v_h,zero);
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uint16x8_t vaccl = vcombine_u16(vmovn_u32(v_l),vmovn_u32(v_h));
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uint16x8_t co = vcombine_u16(vl16,vh16);
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vst1q_u16(VACC_L, vaccl);
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vector_copy(VD, VACC_L);
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vst1q_u16(state->ne, (uint16x8_t)zero);
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vst1q_u16(state->co, co);
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return;
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#else
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ALIGNED int32_t sum[N];
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register int i;
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for (i = 0; i < N; i++)
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sum[i] = (unsigned short)(VS[i]) + (unsigned short)(VT[i]);
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for (i = 0; i < N; i++)
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VACC_L[i] = VS[i] + VT[i];
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vector_copy(VD, VACC_L);
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for (i = 0; i < N; i++)
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state->ne[i] = 0;
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for (i = 0; i < N; i++)
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state->co[i] = sum[i] >> 16; /* native: (sum[i] > +65535) */
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return;
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#endif
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}
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static void VADDC(usf_state_t * state, int vd, int vs, int vt, int e)
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{
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ALIGNED short ST[N];
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SHUFFLE_VECTOR(ST, state->VR[vt], e);
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set_co(state, state->VR[vd], state->VR[vs], ST);
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return;
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}
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