72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/******************************************************************************\
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* Authors: Iconoclast *
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* Release: 2013.10.11 *
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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 do_mudn(usf_state_t * state, short* VD, short* VS, short* VT)
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{
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#ifdef ARCH_MIN_ARM_NEON
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int16x8_t vd, vs,vt,res,four,vacc_l, vacc_m, vacc_h;
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int32x4_t zero = vdupq_n_s32(0);
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int16x8_t zero16 = vdupq_n_s16(0);
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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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int16x4_t vt_low = vld1_s16((const int16_t *)VT);
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int16x4_t vt_high = vld1_s16((const int16_t *)VT+4);
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uint32x4_t l1 = vmovl_u16(vs_low);
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uint32x4_t h1 = vmovl_u16(vs_high);
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int32x4_t l2 = vmovl_s16(vt_low);
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int32x4_t h2 = vmovl_s16(vt_high);
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int32x4_t l = vmulq_s32((int32x4_t)l1,l2);
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int32x4_t h = vmulq_s32((int32x4_t)h1,h2);
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int16x8_t vaccl = vcombine_s16(vmovn_s32(l),vmovn_s32(h));
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int16x8_t vaccm = vcombine_s16(vaddhn_s32(l,zero),vaddhn_s32(h,zero));
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uint16x8_t uvacch = vcltq_s16(vaccm, zero16);
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vst1q_s16(VACC_L, vaccl);
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vst1q_s16(VACC_M, vaccm);
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vst1q_s16(VACC_H, (int16x8_t)uvacch);
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vector_copy(VD, VACC_L); /* no possibilities to clamp */
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return;
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#else
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register int i;
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for (i = 0; i < N; i++)
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VACC_L[i] = ((unsigned short)(VS[i])*VT[i] & 0x00000000FFFF) >> 0;
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for (i = 0; i < N; i++)
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VACC_M[i] = ((unsigned short)(VS[i])*VT[i] & 0x0000FFFF0000) >> 16;
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for (i = 0; i < N; i++)
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VACC_H[i] = -(VACC_M[i] < 0);
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vector_copy(VD, VACC_L); /* no possibilities to clamp */
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return;
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#endif
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}
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static void VMUDN(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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do_mudn(state, state->VR[vd], state->VR[vs], ST);
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return;
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}
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