include/gmx_simd_vec.h

   1 /*
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  37
  38 /* The macros in this file are intended to be used for writing
  39  * architecture-independent SIMD intrinsics code.
  40  * To support a new architecture, adding macros here should be (nearly)
  41  * all that is needed.
  42  */
  43
  44 /* This file contains vector operation functions using SIMD intrinsics.
  45  * gmx_simd_macros.h should be included before including this file.
  46  */
  47
  48 #ifndef _gmx_simd_vec_h_
  49 #define _gmx_simd_vec_h_
  50
  51 #ifndef _gmx_simd_macros_h_
  52 #error "gmx_simd_macros.h was not included before including gmx_simd_vec.h"
  53 #endif
  54
  55
  56 /* x^2 + y^2 + z^2 */
  57 static gmx_inline gmx_mm_pr
  58 gmx_calc_rsq_pr(gmx_mm_pr x, gmx_mm_pr y, gmx_mm_pr z)
  59 {
  60     return gmx_madd_pr(z, z, gmx_madd_pr(y, y, gmx_mul_pr(x, x)));
  61 }
  62
  63 /* inner-product of multiple vectors */
  64 static gmx_inline gmx_mm_pr
  65 gmx_iprod_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az,
  66              gmx_mm_pr bx, gmx_mm_pr by, gmx_mm_pr bz)
  67 {
  68     gmx_mm_pr ret;
  69
  70     ret = gmx_mul_pr(ax, bx);
  71     ret = gmx_madd_pr(ay, by, ret);
  72     ret = gmx_madd_pr(az, bz, ret);
  73
  74     return ret;
  75 }
  76
  77 /* norm squared of multiple vectors */
  78 static gmx_inline gmx_mm_pr
  79 gmx_norm2_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az)
  80 {
  81     gmx_mm_pr ret;
  82
  83     ret = gmx_mul_pr(ax, ax);
  84     ret = gmx_madd_pr(ay, ay, ret);
  85     ret = gmx_madd_pr(az, az, ret);
  86
  87     return ret;
  88 }
  89
  90 /* cross-product of multiple vectors */
  91 static gmx_inline void
  92 gmx_cprod_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az,
  93              gmx_mm_pr bx, gmx_mm_pr by, gmx_mm_pr bz,
  94              gmx_mm_pr *cx, gmx_mm_pr *cy, gmx_mm_pr *cz)
  95 {
  96     *cx = gmx_mul_pr(ay, bz);
  97     *cx = gmx_nmsub_pr(az, by, *cx);
  98
  99     *cy = gmx_mul_pr(az, bx);
 100     *cy = gmx_nmsub_pr(ax, bz, *cy);
 101
 102     *cz = gmx_mul_pr(ax, by);
 103     *cz = gmx_nmsub_pr(ay, bx, *cz);
 104 }
 105
 106 /* a + b + c + d (not really a vector operation, but where else put this?) */
 107 static gmx_inline gmx_mm_pr
 108 gmx_sum4_pr(gmx_mm_pr a, gmx_mm_pr b, gmx_mm_pr c, gmx_mm_pr d)
 109 {
 110     return gmx_add_pr(gmx_add_pr(a, b), gmx_add_pr(c, d));
 111 }
 112
 113
 114 #endif /* _gmx_simd_vec_h_ */