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 "util/u_math.h"
  28 #include "nir/nir_builder.h"
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 /*
  35  * Functions are sorted alphabetically with removed type and "fast" prefix.
  36  * Definitions for functions in the C file come first.
  37  */
  38
  39 nir_ssa_def* nir_cross3(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  40 nir_ssa_def* nir_cross4(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  41 nir_ssa_def* nir_length(nir_builder *b, nir_ssa_def *vec);
  42 nir_ssa_def* nir_fast_length(nir_builder *b, nir_ssa_def *vec);
  43 nir_ssa_def* nir_nextafter(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  44 nir_ssa_def* nir_normalize(nir_builder *b, nir_ssa_def *vec);
  45 nir_ssa_def* nir_rotate(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y);
  46 nir_ssa_def* nir_smoothstep(nir_builder *b, nir_ssa_def *edge0,
  47                             nir_ssa_def *edge1, nir_ssa_def *x);
  48 nir_ssa_def* nir_upsample(nir_builder *b, nir_ssa_def *hi, nir_ssa_def *lo);
  49 nir_ssa_def* nir_atan(nir_builder *b, nir_ssa_def *y_over_x);
  50 nir_ssa_def* nir_atan2(nir_builder *b, nir_ssa_def *y, nir_ssa_def *x);
  51
  52 nir_ssa_def *
  53 nir_get_texture_lod(nir_builder *b, nir_tex_instr *tex);
  54
  55 nir_ssa_def *
  56 nir_get_texture_size(nir_builder *b, nir_tex_instr *tex);
  57
  58 static inline nir_ssa_def *
  59 nir_nan_check2(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *res)
  60 {
  61    return nir_bcsel(b, nir_fne(b, x, x), x, nir_bcsel(b, nir_fne(b, y, y), y, res));
  62 }
  63
  64 static inline nir_ssa_def *
  65 nir_fmax_abs_vec_comp(nir_builder *b, nir_ssa_def *vec)
  66 {
  67    nir_ssa_def *res = nir_channel(b, vec, 0);
  68    for (unsigned i = 1; i < vec->num_components; ++i)
  69       res = nir_fmax(b, res, nir_fabs(b, nir_channel(b, vec, i)));
  70    return res;
  71 }
  72
  73 static inline nir_ssa_def *
  74 nir_iabs_diff(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
  75 {
  76    nir_ssa_def *cond = nir_ige(b, x, y);
  77    nir_ssa_def *res0 = nir_isub(b, x, y);
  78    nir_ssa_def *res1 = nir_isub(b, y, x);
  79    return nir_bcsel(b, cond, res0, res1);
  80 }
  81
  82 static inline nir_ssa_def *
  83 nir_uabs_diff(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
  84 {
  85    nir_ssa_def *cond = nir_uge(b, x, y);
  86    nir_ssa_def *res0 = nir_isub(b, x, y);
  87    nir_ssa_def *res1 = nir_isub(b, y, x);
  88    return nir_bcsel(b, cond, res0, res1);
  89 }
  90
  91 static inline nir_ssa_def *
  92 nir_umul24(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
  93 {
  94    nir_ssa_def *mask = nir_imm_int(b, 0xffffff);
  95    nir_ssa_def *x_24 = nir_iand(b, x, mask);
  96    nir_ssa_def *y_24 = nir_iand(b, y, mask);
  97    return nir_imul(b, x_24, y_24);
  98 }
  99
 100 static inline nir_ssa_def *
 101 nir_umad24(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 102 {
 103    nir_ssa_def *temp = nir_umul24(b, x, y);
 104    return nir_iadd(b, temp, z);
 105 }
 106
 107 static inline nir_ssa_def *
 108 nir_imad24(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 109 {
 110    nir_ssa_def *temp = nir_imul24(b, x, y);
 111    return nir_iadd(b, temp, z);
 112 }
 113
 114 static inline nir_ssa_def *
 115 nir_imad_hi(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 116 {
 117    nir_ssa_def *temp = nir_imul_high(b, x, y);
 118    return nir_iadd(b, temp, z);
 119 }
 120
 121 static inline nir_ssa_def *
 122 nir_umad_hi(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 123 {
 124    nir_ssa_def *temp = nir_umul_high(b, x, y);
 125    return nir_iadd(b, temp, z);
 126 }
 127
 128 static inline nir_ssa_def *
 129 nir_bitselect(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *s)
 130 {
 131    return nir_ior(b, nir_iand(b, nir_inot(b, s), x), nir_iand(b, s, y));
 132 }
 133
 134 static inline nir_ssa_def *
 135 nir_fclamp(nir_builder *b,
 136            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
 137 {
 138    return nir_fmin(b, nir_fmax(b, x, min_val), max_val);
 139 }
 140
 141 static inline nir_ssa_def *
 142 nir_iclamp(nir_builder *b,
 143            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
 144 {
 145    return nir_imin(b, nir_imax(b, x, min_val), max_val);
 146 }
 147
 148 static inline nir_ssa_def *
 149 nir_uclamp(nir_builder *b,
 150            nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
 151 {
 152    return nir_umin(b, nir_umax(b, x, min_val), max_val);
 153 }
 154
 155 static inline nir_ssa_def *
 156 nir_copysign(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 157 {
 158    uint64_t masks = 1ull << (x->bit_size - 1);
 159    uint64_t maskv = ~masks;
 160
 161    nir_ssa_def *s = nir_imm_intN_t(b, masks, x->bit_size);
 162    nir_ssa_def *v = nir_imm_intN_t(b, maskv, x->bit_size);
 163
 164    return nir_ior(b, nir_iand(b, x, v), nir_iand(b, y, s));
 165 }
 166
 167 static inline nir_ssa_def *
 168 nir_degrees(nir_builder *b, nir_ssa_def *val)
 169 {
 170    return nir_fmul_imm(b, val, 180.0 / M_PI);
 171 }
 172
 173 static inline nir_ssa_def *
 174 nir_fdim(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 175 {
 176    nir_ssa_def *cond = nir_flt(b, y, x);
 177    nir_ssa_def *res = nir_fsub(b, x, y);
 178    nir_ssa_def *zero = nir_imm_floatN_t(b, 0.0, x->bit_size);
 179
 180    // return NaN if either x or y are NaN, else x-y if x>y, else +0.0
 181    return nir_nan_check2(b, x, y, nir_bcsel(b, cond, res, zero));
 182 }
 183
 184 static inline nir_ssa_def *
 185 nir_distance(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 186 {
 187    return nir_length(b, nir_fsub(b, x, y));
 188 }
 189
 190 static inline nir_ssa_def *
 191 nir_fast_distance(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 192 {
 193    return nir_fast_length(b, nir_fsub(b, x, y));
 194 }
 195
 196 static inline nir_ssa_def*
 197 nir_fast_normalize(nir_builder *b, nir_ssa_def *vec)
 198 {
 199    return nir_fdiv(b, vec, nir_fast_length(b, vec));
 200 }
 201
 202 static inline nir_ssa_def*
 203 nir_fmad(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *z)
 204 {
 205    return nir_fadd(b, nir_fmul(b, x, y), z);
 206 }
 207
 208 static inline nir_ssa_def*
 209 nir_maxmag(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 210 {
 211    nir_ssa_def *xabs = nir_fabs(b, x);
 212    nir_ssa_def *yabs = nir_fabs(b, y);
 213
 214    nir_ssa_def *condy = nir_flt(b, xabs, yabs);
 215    nir_ssa_def *condx = nir_flt(b, yabs, xabs);
 216
 217    return nir_bcsel(b, condy, y, nir_bcsel(b, condx, x, nir_fmax(b, x, y)));
 218 }
 219
 220 static inline nir_ssa_def*
 221 nir_minmag(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
 222 {
 223    nir_ssa_def *xabs = nir_fabs(b, x);
 224    nir_ssa_def *yabs = nir_fabs(b, y);
 225
 226    nir_ssa_def *condx = nir_flt(b, xabs, yabs);
 227    nir_ssa_def *condy = nir_flt(b, yabs, xabs);
 228
 229    return nir_bcsel(b, condy, y, nir_bcsel(b, condx, x, nir_fmin(b, x, y)));
 230 }
 231
 232 static inline nir_ssa_def*
 233 nir_nan(nir_builder *b, nir_ssa_def *x)
 234 {
 235    nir_ssa_def *nan = nir_imm_floatN_t(b, NAN, x->bit_size);
 236    if (x->num_components == 1)
 237       return nan;
 238
 239    nir_ssa_def *nans[NIR_MAX_VEC_COMPONENTS];
 240    for (unsigned i = 0; i < x->num_components; ++i)
 241       nans[i] = nan;
 242
 243    return nir_vec(b, nans, x->num_components);
 244 }
 245
 246 static inline nir_ssa_def *
 247 nir_radians(nir_builder *b, nir_ssa_def *val)
 248 {
 249    return nir_fmul_imm(b, val, M_PI / 180.0);
 250 }
 251
 252 static inline nir_ssa_def *
 253 nir_select(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y, nir_ssa_def *s)
 254 {
 255    if (s->num_components != 1) {
 256       uint64_t mask = 1ull << (s->bit_size - 1);
 257       s = nir_iand(b, s, nir_imm_intN_t(b, mask, s->bit_size));
 258    }
 259    return nir_bcsel(b, nir_ieq(b, s, nir_imm_intN_t(b, 0, s->bit_size)), x, y);
 260 }
 261
 262 static inline nir_ssa_def *
 263 nir_clz_u(nir_builder *b, nir_ssa_def *a)
 264 {
 265    nir_ssa_def *val;
 266    val = nir_isub(b, nir_imm_intN_t(b, a->bit_size - 1, 32), nir_ufind_msb(b, a));
 267    return nir_u2u(b, val, a->bit_size);
 268 }
 269
 270 #ifdef __cplusplus
 271 }
 272 #endif
 273
 274 #endif /* NIR_BUILTIN_BUILDER_H */