src/compiler/nir/nir_builtin_builder.h

   1 /*
   2  * Copyright © 2018 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef NIR_BUILTIN_BUILDER_H
  25 #define NIR_BUILTIN_BUILDER_H
  26
  27 #include "nir/nir_builder.h"
  28
  29 /*
  30  * Functions are sorted alphabetically with removed type and "fast" prefix.
  31  * Definitions for functions in the C file come first.
  32  */
  33
  34 nir_ssa_def* nir_cross3(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  35 nir_ssa_def* nir_cross4(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  36 nir_ssa_def* nir_length(nir_builder *b, nir_ssa_def *vec);
  37 nir_ssa_def* nir_fast_length(nir_builder *b, nir_ssa_def *vec);
  38 nir_ssa_def* nir_nextafter(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  39 nir_ssa_def* nir_normalize(nir_builder *b, nir_ssa_def *vec);
  40 nir_ssa_def* nir_rotate(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  41 nir_ssa_def* nir_smoothstep(nir_builder *b, nir_ssa_def *edge0,
  42                             nir_ssa_def *edge1, nir_ssa_def *x);
  43 nir_ssa_def* nir_upsample(nir_builder *b, nir_ssa_def *hi, nir_ssa_def *lo);
  44
  45 static inline nir_ssa_def *
  46 nir_nan_check2(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *res)
  47 {
  48    return nir_bcsel(b, nir_fne(b, x, x), x, nir_bcsel(b, nir_fne(b, y, y), y, res));
  49 }
  50
  51 static inline nir_ssa_def *
  52 nir_fmax_abs_vec_comp(nir_builder *b, nir_ssa_def *vec)
  53 {
  54    nir_ssa_def *res = nir_channel(b, vec, 0);
  55    for (unsigned i = 1; i < vec->num_components; ++i)
  56       res = nir_fmax(b, res, nir_fabs(b, nir_channel(b, vec, i)));
  57    return res;
  58 }
  59
  60 static inline nir_ssa_def *
  61 nir_iabs_diff(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
  62 {
  63    nir_ssa_def *cond = nir_ige(b, x, y);
  64    nir_ssa_def *res0 = nir_isub(b, x, y);
  65    nir_ssa_def *res1 = nir_isub(b, y, x);
  66    return nir_bcsel(b, cond, res0, res1);
  67 }
  68
  69 static inline nir_ssa_def *
  70 nir_uabs_diff(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
  71 {
  72    nir_ssa_def *cond = nir_uge(b, x, y);
  73    nir_ssa_def *res0 = nir_isub(b, x, y);
  74    nir_ssa_def *res1 = nir_isub(b, y, x);
  75    return nir_bcsel(b, cond, res0, res1);
  76 }
  77
  78 static inline nir_ssa_def *
  79 nir_bitselect(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *s)
  80 {
  81    return nir_ior(b, nir_iand(b, nir_inot(b, s), x), nir_iand(b, s, y));
  82 }
  83
  84 static inline nir_ssa_def *
  85 nir_fclamp(nir_builder *b,
  86            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
  87 {
  88    return nir_fmin(b, nir_fmax(b, x, min_val), max_val);
  89 }
  90
  91 static inline nir_ssa_def *
  92 nir_iclamp(nir_builder *b,
  93            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
  94 {
  95    return nir_imin(b, nir_imax(b, x, min_val), max_val);
  96 }
  97
  98 static inline nir_ssa_def *
  99 nir_uclamp(nir_builder *b,
 100            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
 101 {
 102    return nir_umin(b, nir_umax(b, x, min_val), max_val);
 103 }
 104
 105 static inline nir_ssa_def *
 106 nir_copysign(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 107 {
 108    uint64_t masks = 1ull << (x->bit_size - 1);
 109    uint64_t maskv = ~masks;
 110
 111    nir_ssa_def *s = nir_imm_intN_t(b, masks, x->bit_size);
 112    nir_ssa_def *v = nir_imm_intN_t(b, maskv, x->bit_size);
 113
 114    return nir_ior(b, nir_iand(b, x, v), nir_iand(b, y, s));
 115 }
 116
 117 static inline nir_ssa_def *
 118 nir_degrees(nir_builder *b, nir_ssa_def *val)
 119 {
 120    return nir_fmul_imm(b, val, 180.0 / M_PI);
 121 }
 122
 123 static inline nir_ssa_def *
 124 nir_fdim(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 125 {
 126    nir_ssa_def *cond = nir_flt(b, y, x);
 127    nir_ssa_def *res = nir_fsub(b, x, y);
 128    nir_ssa_def *zero = nir_imm_floatN_t(b, 0.0, x->bit_size);
 129
 130    // return NaN if either x or y are NaN, else x-y if x>y, else +0.0
 131    return nir_nan_check2(b, x, y, nir_bcsel(b, cond, res, zero));
 132 }
 133
 134 static inline nir_ssa_def *
 135 nir_distance(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 136 {
 137    return nir_length(b, nir_fsub(b, x, y));
 138 }
 139
 140 static inline nir_ssa_def *
 141 nir_fast_distance(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 142 {
 143    return nir_fast_length(b, nir_fsub(b, x, y));
 144 }
 145
 146 static inline nir_ssa_def*
 147 nir_fast_normalize(nir_builder *b, nir_ssa_def *vec)
 148 {
 149    return nir_fdiv(b, vec, nir_fast_length(b, vec));
 150 }
 151
 152 static inline nir_ssa_def*
 153 nir_fmad(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 154 {
 155    return nir_fadd(b, nir_fmul(b, x, y), z);
 156 }
 157
 158 static inline nir_ssa_def*
 159 nir_maxmag(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 160 {
 161    nir_ssa_def *xabs = nir_fabs(b, x);
 162    nir_ssa_def *yabs = nir_fabs(b, y);
 163
 164    nir_ssa_def *condy = nir_flt(b, xabs, yabs);
 165    nir_ssa_def *condx = nir_flt(b, yabs, xabs);
 166
 167    return nir_bcsel(b, condy, y, nir_bcsel(b, condx, x, nir_fmax(b, x, y)));
 168 }
 169
 170 static inline nir_ssa_def*
 171 nir_minmag(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 172 {
 173    nir_ssa_def *xabs = nir_fabs(b, x);
 174    nir_ssa_def *yabs = nir_fabs(b, y);
 175
 176    nir_ssa_def *condx = nir_flt(b, xabs, yabs);
 177    nir_ssa_def *condy = nir_flt(b, yabs, xabs);
 178
 179    return nir_bcsel(b, condy, y, nir_bcsel(b, condx, x, nir_fmin(b, x, y)));
 180 }
 181
 182 static inline nir_ssa_def*
 183 nir_nan(nir_builder *b, nir_ssa_def *x)
 184 {
 185    nir_ssa_def *nan = nir_imm_floatN_t(b, NAN, x->bit_size);
 186    if (x->num_components == 1)
 187       return nan;
 188
 189    nir_ssa_def *nans[NIR_MAX_VEC_COMPONENTS];
 190    for (unsigned i = 0; i < x->num_components; ++i)
 191       nans[i] = nan;
 192
 193    return nir_vec(b, nans, x->num_components);
 194 }
 195
 196 static inline nir_ssa_def *
 197 nir_radians(nir_builder *b, nir_ssa_def *val)
 198 {
 199    return nir_fmul_imm(b, val, M_PI / 180.0);
 200 }
 201
 202 static inline nir_ssa_def *
 203 nir_select(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *s)
 204 {
 205    if (s->num_components != 1) {
 206       uint64_t mask = 1ull << (s->bit_size - 1);
 207       s = nir_iand(b, s, nir_imm_intN_t(b, mask, s->bit_size));
 208    }
 209    return nir_bcsel(b, nir_ieq(b, s, nir_imm_intN_t(b, 0, s->bit_size)), x, y);
 210 }
 211
 212 #endif /* NIR_BUILTIN_BUILDER_H */