2 # Copyright (C) 2014 Intel Corporation
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:
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
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
24 # Jason Ekstrand (jason@jlekstrand.net)
26 from __future__
import print_function
28 from collections
import OrderedDict
30 from nir_opcodes
import type_sizes
35 # Convenience variables
42 # Written in the form (<search>, <replace>) where <search> is an expression
43 # and <replace> is either an expression or a value. An expression is
44 # defined as a tuple of the form ([~]<op>, <src0>, <src1>, <src2>, <src3>)
45 # where each source is either an expression or a value. A value can be
46 # either a numeric constant or a string representing a variable name.
48 # If the opcode in a search expression is prefixed by a '~' character, this
49 # indicates that the operation is inexact. Such operations will only get
50 # applied to SSA values that do not have the exact bit set. This should be
51 # used by by any optimizations that are not bit-for-bit exact. It should not,
52 # however, be used for backend-requested lowering operations as those need to
53 # happen regardless of precision.
55 # Variable names are specified as "[#]name[@type][(cond)][.swiz]" where:
56 # "#" indicates that the given variable will only match constants,
57 # type indicates that the given variable will only match values from ALU
58 # instructions with the given output type,
59 # (cond) specifies an additional condition function (see nir_search_helpers.h),
60 # swiz is a swizzle applied to the variable (only in the <replace> expression)
62 # For constants, you have to be careful to make sure that it is the right
63 # type because python is unaware of the source and destination types of the
66 # All expression types can have a bit-size specified. For opcodes, this
67 # looks like "op@32", for variables it is "a@32" or "a@uint32" to specify a
68 # type and size. In the search half of the expression this indicates that it
69 # should only match that particular bit-size. In the replace half of the
70 # expression this indicates that the constructed value should have that
73 # If the opcode in a replacement expression is prefixed by a '!' character,
74 # this indicated that the new expression will be marked exact.
76 # A special condition "many-comm-expr" can be used with expressions to note
77 # that the expression and its subexpressions have more commutative expressions
78 # than nir_replace_instr can handle. If this special condition is needed with
79 # another condition, the two can be separated by a comma (e.g.,
80 # "(many-comm-expr,is_used_once)").
82 # based on https://web.archive.org/web/20180105155939/http://forum.devmaster.net/t/fast-and-accurate-sine-cosine/9648
83 def lowered_sincos(c
):
84 x
= ('fsub', ('fmul', 2.0, ('ffract', ('fadd', ('fmul', 0.5 / pi
, a
), c
))), 1.0)
85 x
= ('fmul', ('fsub', x
, ('fmul', x
, ('fabs', x
))), 4.0)
86 return ('ffma', ('ffma', x
, ('fabs', x
), ('fneg', x
)), 0.225, x
)
88 def intBitsToFloat(i
):
89 return struct
.unpack('!f', struct
.pack('!I', i
))[0]
93 (('imul', a
, '#b@32(is_pos_power_of_two)'), ('ishl', a
, ('find_lsb', b
)), '!options->lower_bitops'),
94 (('imul', a
, '#b@32(is_neg_power_of_two)'), ('ineg', ('ishl', a
, ('find_lsb', ('iabs', b
)))), '!options->lower_bitops'),
95 (('ishl', a
, '#b@32'), ('imul', a
, ('ishl', 1, b
)), 'options->lower_bitops'),
97 (('unpack_64_2x32_split_x', ('imul_2x32_64(is_used_once)', a
, b
)), ('imul', a
, b
)),
98 (('unpack_64_2x32_split_x', ('umul_2x32_64(is_used_once)', a
, b
)), ('imul', a
, b
)),
99 (('imul_2x32_64', a
, b
), ('pack_64_2x32_split', ('imul', a
, b
), ('imul_high', a
, b
)), 'options->lower_mul_2x32_64'),
100 (('umul_2x32_64', a
, b
), ('pack_64_2x32_split', ('imul', a
, b
), ('umul_high', a
, b
)), 'options->lower_mul_2x32_64'),
105 (('udiv', a
, '#b@32(is_pos_power_of_two)'), ('ushr', a
, ('find_lsb', b
)), '!options->lower_bitops'),
106 (('idiv', a
, '#b@32(is_pos_power_of_two)'), ('imul', ('isign', a
), ('ushr', ('iabs', a
), ('find_lsb', b
))), 'options->lower_idiv'),
107 (('idiv', a
, '#b@32(is_neg_power_of_two)'), ('ineg', ('imul', ('isign', a
), ('ushr', ('iabs', a
), ('find_lsb', ('iabs', b
))))), 'options->lower_idiv'),
108 (('umod', a
, '#b(is_pos_power_of_two)'), ('iand', a
, ('isub', b
, 1))),
110 (('~fneg', ('fneg', a
)), a
),
111 (('ineg', ('ineg', a
)), a
),
112 (('fabs', ('fabs', a
)), ('fabs', a
)),
113 (('fabs', ('fneg', a
)), ('fabs', a
)),
114 (('fabs', ('u2f', a
)), ('u2f', a
)),
115 (('iabs', ('iabs', a
)), ('iabs', a
)),
116 (('iabs', ('ineg', a
)), ('iabs', a
)),
117 (('f2b', ('fneg', a
)), ('f2b', a
)),
118 (('i2b', ('ineg', a
)), ('i2b', a
)),
119 (('~fadd', a
, 0.0), a
),
121 (('usadd_4x8', a
, 0), a
),
122 (('usadd_4x8', a
, ~
0), ~
0),
123 (('~fadd', ('fmul', a
, b
), ('fmul', a
, c
)), ('fmul', a
, ('fadd', b
, c
))),
124 (('iadd', ('imul', a
, b
), ('imul', a
, c
)), ('imul', a
, ('iadd', b
, c
))),
125 (('~fadd', ('fneg', a
), a
), 0.0),
126 (('iadd', ('ineg', a
), a
), 0),
127 (('iadd', ('ineg', a
), ('iadd', a
, b
)), b
),
128 (('iadd', a
, ('iadd', ('ineg', a
), b
)), b
),
129 (('~fadd', ('fneg', a
), ('fadd', a
, b
)), b
),
130 (('~fadd', a
, ('fadd', ('fneg', a
), b
)), b
),
131 (('fadd', ('fsat', a
), ('fsat', ('fneg', a
))), ('fsat', ('fabs', a
))),
132 (('~fmul', a
, 0.0), 0.0),
134 (('umul_unorm_4x8', a
, 0), 0),
135 (('umul_unorm_4x8', a
, ~
0), a
),
136 (('~fmul', a
, 1.0), a
),
138 (('fmul', a
, -1.0), ('fneg', a
)),
139 (('imul', a
, -1), ('ineg', a
)),
140 # If a < 0: fsign(a)*a*a => -1*a*a => -a*a => abs(a)*a
141 # If a > 0: fsign(a)*a*a => 1*a*a => a*a => abs(a)*a
142 # If a == 0: fsign(a)*a*a => 0*0*0 => abs(0)*0
143 (('fmul', ('fsign', a
), ('fmul', a
, a
)), ('fmul', ('fabs', a
), a
)),
144 (('fmul', ('fmul', ('fsign', a
), a
), a
), ('fmul', ('fabs', a
), a
)),
145 (('~ffma', 0.0, a
, b
), b
),
146 (('~ffma', a
, b
, 0.0), ('fmul', a
, b
)),
147 (('ffma', 1.0, a
, b
), ('fadd', a
, b
)),
148 (('ffma', -1.0, a
, b
), ('fadd', ('fneg', a
), b
)),
149 (('~flrp', a
, b
, 0.0), a
),
150 (('~flrp', a
, b
, 1.0), b
),
151 (('~flrp', a
, a
, b
), a
),
152 (('~flrp', 0.0, a
, b
), ('fmul', a
, b
)),
154 # flrp(a, a + b, c) => a + flrp(0, b, c) => a + (b * c)
155 (('~flrp', a
, ('fadd(is_used_once)', a
, b
), c
), ('fadd', ('fmul', b
, c
), a
)),
156 (('~flrp@32', a
, ('fadd', a
, b
), c
), ('fadd', ('fmul', b
, c
), a
), 'options->lower_flrp32'),
157 (('~flrp@64', a
, ('fadd', a
, b
), c
), ('fadd', ('fmul', b
, c
), a
), 'options->lower_flrp64'),
159 (('~flrp@32', ('fadd', a
, b
), ('fadd', a
, c
), d
), ('fadd', ('flrp', b
, c
, d
), a
), 'options->lower_flrp32'),
160 (('~flrp@64', ('fadd', a
, b
), ('fadd', a
, c
), d
), ('fadd', ('flrp', b
, c
, d
), a
), 'options->lower_flrp64'),
162 (('~flrp@32', a
, ('fmul(is_used_once)', a
, b
), c
), ('fmul', ('flrp', 1.0, b
, c
), a
), 'options->lower_flrp32'),
163 (('~flrp@64', a
, ('fmul(is_used_once)', a
, b
), c
), ('fmul', ('flrp', 1.0, b
, c
), a
), 'options->lower_flrp64'),
165 (('~flrp', ('fmul(is_used_once)', a
, b
), ('fmul(is_used_once)', a
, c
), d
), ('fmul', ('flrp', b
, c
, d
), a
)),
167 (('~flrp', a
, b
, ('b2f', 'c@1')), ('bcsel', c
, b
, a
), 'options->lower_flrp32'),
168 (('~flrp', a
, 0.0, c
), ('fadd', ('fmul', ('fneg', a
), c
), a
)),
169 (('ftrunc', a
), ('bcsel', ('flt', a
, 0.0), ('fneg', ('ffloor', ('fabs', a
))), ('ffloor', ('fabs', a
))), 'options->lower_ftrunc'),
170 (('ffloor', a
), ('fsub', a
, ('ffract', a
)), 'options->lower_ffloor'),
171 (('fadd', a
, ('fneg', ('ffract', a
))), ('ffloor', a
), '!options->lower_ffloor'),
172 (('ffract', a
), ('fsub', a
, ('ffloor', a
)), 'options->lower_ffract'),
173 (('fceil', a
), ('fneg', ('ffloor', ('fneg', a
))), 'options->lower_fceil'),
174 (('~fadd', ('fmul', a
, ('fadd', 1.0, ('fneg', ('b2f', 'c@1')))), ('fmul', b
, ('b2f', c
))), ('bcsel', c
, b
, a
), 'options->lower_flrp32'),
175 (('~fadd@32', ('fmul', a
, ('fadd', 1.0, ('fneg', c
) )), ('fmul', b
, c
)), ('flrp', a
, b
, c
), '!options->lower_flrp32'),
176 (('~fadd@64', ('fmul', a
, ('fadd', 1.0, ('fneg', c
) )), ('fmul', b
, c
)), ('flrp', a
, b
, c
), '!options->lower_flrp64'),
177 # These are the same as the previous three rules, but it depends on
178 # 1-fsat(x) <=> fsat(1-x). See below.
179 (('~fadd@32', ('fmul', a
, ('fsat', ('fadd', 1.0, ('fneg', c
)))), ('fmul', b
, ('fsat', c
))), ('flrp', a
, b
, ('fsat', c
)), '!options->lower_flrp32'),
180 (('~fadd@64', ('fmul', a
, ('fsat', ('fadd', 1.0, ('fneg', c
)))), ('fmul', b
, ('fsat', c
))), ('flrp', a
, b
, ('fsat', c
)), '!options->lower_flrp64'),
182 (('~fadd', a
, ('fmul', ('b2f', 'c@1'), ('fadd', b
, ('fneg', a
)))), ('bcsel', c
, b
, a
), 'options->lower_flrp32'),
183 (('~fadd@32', a
, ('fmul', c
, ('fadd', b
, ('fneg', a
)))), ('flrp', a
, b
, c
), '!options->lower_flrp32'),
184 (('~fadd@64', a
, ('fmul', c
, ('fadd', b
, ('fneg', a
)))), ('flrp', a
, b
, c
), '!options->lower_flrp64'),
185 (('ffma', a
, b
, c
), ('fadd', ('fmul', a
, b
), c
), 'options->lower_ffma'),
186 (('~fadd', ('fmul', a
, b
), c
), ('ffma', a
, b
, c
), 'options->fuse_ffma'),
188 (('~fmul', ('fadd', ('iand', ('ineg', ('b2i32', 'a@bool')), ('fmul', b
, c
)), '#d'), '#e'),
189 ('bcsel', a
, ('fmul', ('fadd', ('fmul', b
, c
), d
), e
), ('fmul', d
, e
))),
191 (('fdph', a
, b
), ('fdot4', ('vec4', 'a.x', 'a.y', 'a.z', 1.0), b
), 'options->lower_fdph'),
193 (('fdot4', ('vec4', a
, b
, c
, 1.0), d
), ('fdph', ('vec3', a
, b
, c
), d
), '!options->lower_fdph'),
194 (('fdot4', ('vec4', a
, 0.0, 0.0, 0.0), b
), ('fmul', a
, b
)),
195 (('fdot4', ('vec4', a
, b
, 0.0, 0.0), c
), ('fdot2', ('vec2', a
, b
), c
)),
196 (('fdot4', ('vec4', a
, b
, c
, 0.0), d
), ('fdot3', ('vec3', a
, b
, c
), d
)),
198 (('fdot3', ('vec3', a
, 0.0, 0.0), b
), ('fmul', a
, b
)),
199 (('fdot3', ('vec3', a
, b
, 0.0), c
), ('fdot2', ('vec2', a
, b
), c
)),
201 (('fdot2', ('vec2', a
, 0.0), b
), ('fmul', a
, b
)),
202 (('fdot2', a
, 1.0), ('fadd', 'a.x', 'a.y')),
204 # Lower fdot to fsum when it is available
205 (('fdot2', a
, b
), ('fsum2', ('fmul', a
, b
)), 'options->lower_fdot'),
206 (('fdot3', a
, b
), ('fsum3', ('fmul', a
, b
)), 'options->lower_fdot'),
207 (('fdot4', a
, b
), ('fsum4', ('fmul', a
, b
)), 'options->lower_fdot'),
208 (('fsum2', a
), ('fadd', 'a.x', 'a.y'), 'options->lower_fdot'),
210 # If x >= 0 and x <= 1: fsat(1 - x) == 1 - fsat(x) trivially
211 # If x < 0: 1 - fsat(x) => 1 - 0 => 1 and fsat(1 - x) => fsat(> 1) => 1
212 # If x > 1: 1 - fsat(x) => 1 - 1 => 0 and fsat(1 - x) => fsat(< 0) => 0
213 (('~fadd', ('fneg(is_used_once)', ('fsat(is_used_once)', 'a(is_not_fmul)')), 1.0), ('fsat', ('fadd', 1.0, ('fneg', a
)))),
215 # 1 - ((1 - a) * (1 - b))
216 # 1 - (1 - a - b + a*b)
217 # 1 - 1 + a + b - a*b
222 (('~fadd@32', 1.0, ('fneg', ('fmul', ('fadd', 1.0, ('fneg', a
)), ('fadd', 1.0, ('fneg', b
))))),
223 ('flrp', b
, 1.0, a
), '!options->lower_flrp32'),
225 # (a * #b + #c) << #d
226 # ((a * #b) << #d) + (#c << #d)
227 # (a * (#b << #d)) + (#c << #d)
228 (('ishl', ('iadd', ('imul', a
, '#b'), '#c'), '#d'),
229 ('iadd', ('imul', a
, ('ishl', b
, d
)), ('ishl', c
, d
))),
233 (('ishl', ('imul', a
, '#b'), '#c'), ('imul', a
, ('ishl', b
, c
))),
236 # Care must be taken here. Shifts in NIR uses only the lower log2(bitsize)
237 # bits of the second source. These replacements must correctly handle the
238 # case where (b % bitsize) + (c % bitsize) >= bitsize.
239 for s
in [8, 16, 32, 64]:
242 ishl
= "ishl@{}".format(s
)
243 ishr
= "ishr@{}".format(s
)
244 ushr
= "ushr@{}".format(s
)
246 in_bounds
= ('ult', ('iadd', ('iand', b
, mask
), ('iand', c
, mask
)), s
)
248 optimizations
.extend([
249 ((ishl
, (ishl
, a
, '#b'), '#c'), ('bcsel', in_bounds
, (ishl
, a
, ('iadd', b
, c
)), 0)),
250 ((ushr
, (ushr
, a
, '#b'), '#c'), ('bcsel', in_bounds
, (ushr
, a
, ('iadd', b
, c
)), 0)),
252 # To get get -1 for large shifts of negative values, ishr must instead
253 # clamp the shift count to the maximum value.
254 ((ishr
, (ishr
, a
, '#b'), '#c'),
255 (ishr
, a
, ('imin', ('iadd', ('iand', b
, mask
), ('iand', c
, mask
)), s
- 1))),
258 # Optimize a pattern of address calculation created by DXVK where the offset is
259 # divided by 4 and then multipled by 4. This can be turned into an iand and the
260 # additions before can be reassociated to CSE the iand instruction.
261 for log2
in range(1, 7): # powers of two from 2 to 64
263 mask
= 0xffffffff & ~
(v
- 1)
264 b_is_multiple
= '#b(is_unsigned_multiple_of_{})'.format(v
)
266 optimizations
.extend([
267 # 'a >> #b << #b' -> 'a & ~((1 << #b) - 1)'
268 (('ishl@32', ('ushr@32', a
, log2
), log2
), ('iand', a
, mask
)),
270 # Reassociate for improved CSE
271 (('iand@32', ('iadd@32', a
, b_is_multiple
), mask
), ('iadd', ('iand', a
, mask
), b
)),
274 optimizations
.extend([
275 # This is common for address calculations. Reassociating may enable the
276 # 'a<<c' to be CSE'd. It also helps architectures that have an ISHLADD
277 # instruction or a constant offset field for in load / store instructions.
278 (('ishl', ('iadd', a
, '#b'), '#c'), ('iadd', ('ishl', a
, c
), ('ishl', b
, c
))),
280 # Comparison simplifications
281 (('~inot', ('flt', a
, b
)), ('fge', a
, b
)),
282 (('~inot', ('fge', a
, b
)), ('flt', a
, b
)),
283 (('inot', ('feq', a
, b
)), ('fne', a
, b
)),
284 (('inot', ('fne', a
, b
)), ('feq', a
, b
)),
285 (('inot', ('ilt', a
, b
)), ('ige', a
, b
)),
286 (('inot', ('ult', a
, b
)), ('uge', a
, b
)),
287 (('inot', ('ige', a
, b
)), ('ilt', a
, b
)),
288 (('inot', ('uge', a
, b
)), ('ult', a
, b
)),
289 (('inot', ('ieq', a
, b
)), ('ine', a
, b
)),
290 (('inot', ('ine', a
, b
)), ('ieq', a
, b
)),
292 (('iand', ('feq', a
, b
), ('fne', a
, b
)), False),
293 (('iand', ('flt', a
, b
), ('flt', b
, a
)), False),
294 (('iand', ('ieq', a
, b
), ('ine', a
, b
)), False),
295 (('iand', ('ilt', a
, b
), ('ilt', b
, a
)), False),
296 (('iand', ('ult', a
, b
), ('ult', b
, a
)), False),
298 # This helps some shaders because, after some optimizations, they end up
299 # with patterns like (-a < -b) || (b < a). In an ideal world, this sort of
300 # matching would be handled by CSE.
301 (('flt', ('fneg', a
), ('fneg', b
)), ('flt', b
, a
)),
302 (('fge', ('fneg', a
), ('fneg', b
)), ('fge', b
, a
)),
303 (('feq', ('fneg', a
), ('fneg', b
)), ('feq', b
, a
)),
304 (('fne', ('fneg', a
), ('fneg', b
)), ('fne', b
, a
)),
305 (('flt', ('fneg', a
), -1.0), ('flt', 1.0, a
)),
306 (('flt', -1.0, ('fneg', a
)), ('flt', a
, 1.0)),
307 (('fge', ('fneg', a
), -1.0), ('fge', 1.0, a
)),
308 (('fge', -1.0, ('fneg', a
)), ('fge', a
, 1.0)),
309 (('fne', ('fneg', a
), -1.0), ('fne', 1.0, a
)),
310 (('feq', -1.0, ('fneg', a
)), ('feq', a
, 1.0)),
312 (('flt', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('flt', a
, b
)),
313 (('flt', '#b(is_gt_0_and_lt_1)', ('fsat(is_used_once)', a
)), ('flt', b
, a
)),
314 (('fge', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('fge', a
, b
)),
315 (('fge', '#b(is_gt_0_and_lt_1)', ('fsat(is_used_once)', a
)), ('fge', b
, a
)),
316 (('feq', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('feq', a
, b
)),
317 (('fne', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('fne', a
, b
)),
319 (('fge', ('fsat(is_used_once)', a
), 1.0), ('fge', a
, 1.0)),
320 (('flt', ('fsat(is_used_once)', a
), 1.0), ('flt', a
, 1.0)),
321 (('fge', 0.0, ('fsat(is_used_once)', a
)), ('fge', 0.0, a
)),
322 (('flt', 0.0, ('fsat(is_used_once)', a
)), ('flt', 0.0, a
)),
326 # b2f(a) == 0.0 because b2f(a) can only be 0 or 1
328 (('fge', 0.0, ('b2f', 'a@1')), ('inot', a
)),
330 (('fge', ('fneg', ('b2f', 'a@1')), 0.0), ('inot', a
)),
332 (('fne', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('ior', a
, b
)),
333 (('fne', ('fmax', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('ior', a
, b
)),
334 (('fne', ('bcsel', a
, 1.0, ('b2f', 'b@1')) , 0.0), ('ior', a
, b
)),
335 (('fne', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), ('ior', a
, b
)),
336 (('fne', ('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('iand', a
, b
)),
337 (('fne', ('fmin', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('iand', a
, b
)),
338 (('fne', ('bcsel', a
, ('b2f', 'b@1'), 0.0) , 0.0), ('iand', a
, b
)),
339 (('fne', ('fadd', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), 0.0), ('ixor', a
, b
)),
340 (('fne', ('b2f', 'a@1') , ('b2f', 'b@1') ), ('ixor', a
, b
)),
341 (('fne', ('fneg', ('b2f', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('ixor', a
, b
)),
342 (('feq', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('ior', a
, b
))),
343 (('feq', ('fmax', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('ior', a
, b
))),
344 (('feq', ('bcsel', a
, 1.0, ('b2f', 'b@1')) , 0.0), ('inot', ('ior', a
, b
))),
345 (('feq', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), ('inot', ('ior', a
, b
))),
346 (('feq', ('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('iand', a
, b
))),
347 (('feq', ('fmin', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('iand', a
, b
))),
348 (('feq', ('bcsel', a
, ('b2f', 'b@1'), 0.0) , 0.0), ('inot', ('iand', a
, b
))),
349 (('feq', ('fadd', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), 0.0), ('ieq', a
, b
)),
350 (('feq', ('b2f', 'a@1') , ('b2f', 'b@1') ), ('ieq', a
, b
)),
351 (('feq', ('fneg', ('b2f', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('ieq', a
, b
)),
353 # -(b2f(a) + b2f(b)) < 0
354 # 0 < b2f(a) + b2f(b)
355 # 0 != b2f(a) + b2f(b) b2f must be 0 or 1, so the sum is non-negative
357 (('flt', ('fneg', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), 0.0), ('ior', a
, b
)),
358 (('flt', 0.0, ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), ('ior', a
, b
)),
360 # -(b2f(a) + b2f(b)) >= 0
361 # 0 >= b2f(a) + b2f(b)
362 # 0 == b2f(a) + b2f(b) b2f must be 0 or 1, so the sum is non-negative
364 (('fge', ('fneg', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), 0.0), ('inot', ('ior', a
, b
))),
365 (('fge', 0.0, ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), ('inot', ('ior', a
, b
))),
367 (('flt', a
, ('fneg', a
)), ('flt', a
, 0.0)),
368 (('fge', a
, ('fneg', a
)), ('fge', a
, 0.0)),
370 # Some optimizations (below) convert things like (a < b || c < b) into
371 # (min(a, c) < b). However, this interfers with the previous optimizations
372 # that try to remove comparisons with negated sums of b2f. This just
374 (('flt', ('fmin', c
, ('fneg', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1')))), 0.0),
375 ('ior', ('flt', c
, 0.0), ('ior', a
, b
))),
377 (('~flt', ('fadd', a
, b
), a
), ('flt', b
, 0.0)),
378 (('~fge', ('fadd', a
, b
), a
), ('fge', b
, 0.0)),
379 (('~feq', ('fadd', a
, b
), a
), ('feq', b
, 0.0)),
380 (('~fne', ('fadd', a
, b
), a
), ('fne', b
, 0.0)),
381 (('~flt', ('fadd(is_used_once)', a
, '#b'), '#c'), ('flt', a
, ('fadd', c
, ('fneg', b
)))),
382 (('~flt', ('fneg(is_used_once)', ('fadd(is_used_once)', a
, '#b')), '#c'), ('flt', ('fneg', ('fadd', c
, b
)), a
)),
383 (('~fge', ('fadd(is_used_once)', a
, '#b'), '#c'), ('fge', a
, ('fadd', c
, ('fneg', b
)))),
384 (('~fge', ('fneg(is_used_once)', ('fadd(is_used_once)', a
, '#b')), '#c'), ('fge', ('fneg', ('fadd', c
, b
)), a
)),
385 (('~feq', ('fadd(is_used_once)', a
, '#b'), '#c'), ('feq', a
, ('fadd', c
, ('fneg', b
)))),
386 (('~feq', ('fneg(is_used_once)', ('fadd(is_used_once)', a
, '#b')), '#c'), ('feq', ('fneg', ('fadd', c
, b
)), a
)),
387 (('~fne', ('fadd(is_used_once)', a
, '#b'), '#c'), ('fne', a
, ('fadd', c
, ('fneg', b
)))),
388 (('~fne', ('fneg(is_used_once)', ('fadd(is_used_once)', a
, '#b')), '#c'), ('fne', ('fneg', ('fadd', c
, b
)), a
)),
390 # Cannot remove the addition from ilt or ige due to overflow.
391 (('ieq', ('iadd', a
, b
), a
), ('ieq', b
, 0)),
392 (('ine', ('iadd', a
, b
), a
), ('ine', b
, 0)),
394 # fmin(-b2f(a), b) >= 0.0
395 # -b2f(a) >= 0.0 && b >= 0.0
396 # -b2f(a) == 0.0 && b >= 0.0 -b2f can only be 0 or -1, never >0
397 # b2f(a) == 0.0 && b >= 0.0
398 # a == False && b >= 0.0
401 # The fge in the second replacement is not a typo. I leave the proof that
402 # "fmin(-b2f(a), b) >= 0 <=> fmin(-b2f(a), b) == 0" as an exercise for the
404 (('fge', ('fmin', ('fneg', ('b2f', 'a@1')), 'b@1'), 0.0), ('iand', ('inot', a
), ('fge', b
, 0.0))),
405 (('feq', ('fmin', ('fneg', ('b2f', 'a@1')), 'b@1'), 0.0), ('iand', ('inot', a
), ('fge', b
, 0.0))),
407 (('feq', ('b2f', 'a@1'), 0.0), ('inot', a
)),
408 (('~fne', ('b2f', 'a@1'), 0.0), a
),
409 (('ieq', ('b2i', 'a@1'), 0), ('inot', a
)),
410 (('ine', ('b2i', 'a@1'), 0), a
),
412 (('fne', ('u2f', a
), 0.0), ('ine', a
, 0)),
413 (('feq', ('u2f', a
), 0.0), ('ieq', a
, 0)),
414 (('fge', ('u2f', a
), 0.0), True),
415 (('fge', 0.0, ('u2f', a
)), ('uge', 0, a
)), # ieq instead?
416 (('flt', ('u2f', a
), 0.0), False),
417 (('flt', 0.0, ('u2f', a
)), ('ult', 0, a
)), # ine instead?
418 (('fne', ('i2f', a
), 0.0), ('ine', a
, 0)),
419 (('feq', ('i2f', a
), 0.0), ('ieq', a
, 0)),
420 (('fge', ('i2f', a
), 0.0), ('ige', a
, 0)),
421 (('fge', 0.0, ('i2f', a
)), ('ige', 0, a
)),
422 (('flt', ('i2f', a
), 0.0), ('ilt', a
, 0)),
423 (('flt', 0.0, ('i2f', a
)), ('ilt', 0, a
)),
427 # fabs(a) != 0.0 because fabs(a) must be >= 0
429 (('~flt', 0.0, ('fabs', a
)), ('fne', a
, 0.0)),
433 (('~flt', ('fneg', ('fabs', a
)), 0.0), ('fne', a
, 0.0)),
436 # 0.0 == fabs(a) because fabs(a) must be >= 0
438 (('fge', 0.0, ('fabs', a
)), ('feq', a
, 0.0)),
442 (('fge', ('fneg', ('fabs', a
)), 0.0), ('feq', a
, 0.0)),
444 # (a >= 0.0) && (a <= 1.0) -> fsat(a) == a
445 (('iand', ('fge', a
, 0.0), ('fge', 1.0, a
)), ('feq', a
, ('fsat', a
)), '!options->lower_fsat'),
447 # (a < 0.0) || (a > 1.0)
448 # !(!(a < 0.0) && !(a > 1.0))
449 # !((a >= 0.0) && (a <= 1.0))
452 (('ior', ('flt', a
, 0.0), ('flt', 1.0, a
)), ('fne', a
, ('fsat', a
)), '!options->lower_fsat'),
454 (('fmax', ('b2f(is_used_once)', 'a@1'), ('b2f', 'b@1')), ('b2f', ('ior', a
, b
))),
455 (('fmax', ('fneg(is_used_once)', ('b2f(is_used_once)', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('fneg', ('b2f', ('ior', a
, b
)))),
456 (('fmin', ('b2f(is_used_once)', 'a@1'), ('b2f', 'b@1')), ('b2f', ('iand', a
, b
))),
457 (('fmin', ('fneg(is_used_once)', ('b2f(is_used_once)', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('fneg', ('b2f', ('iand', a
, b
)))),
460 # bcsel(a, fmin(b2f(a), b), fmin(b2f(a), b))
461 # bcsel(a, fmin(b2f(True), b), fmin(b2f(False), b))
462 # bcsel(a, fmin(1.0, b), fmin(0.0, b))
464 # Since b is a constant, constant folding will eliminate the fmin and the
465 # fmax. If b is > 1.0, the bcsel will be replaced with a b2f.
466 (('fmin', ('b2f', 'a@1'), '#b'), ('bcsel', a
, ('fmin', b
, 1.0), ('fmin', b
, 0.0))),
468 (('flt', ('fadd(is_used_once)', a
, ('fneg', b
)), 0.0), ('flt', a
, b
)),
470 (('fge', ('fneg', ('fabs', a
)), 0.0), ('feq', a
, 0.0)),
471 (('~bcsel', ('flt', b
, a
), b
, a
), ('fmin', a
, b
)),
472 (('~bcsel', ('flt', a
, b
), b
, a
), ('fmax', a
, b
)),
473 (('~bcsel', ('fge', a
, b
), b
, a
), ('fmin', a
, b
)),
474 (('~bcsel', ('fge', b
, a
), b
, a
), ('fmax', a
, b
)),
475 (('bcsel', ('i2b', a
), b
, c
), ('bcsel', ('ine', a
, 0), b
, c
)),
476 (('bcsel', ('inot', a
), b
, c
), ('bcsel', a
, c
, b
)),
477 (('bcsel', a
, ('bcsel', a
, b
, c
), d
), ('bcsel', a
, b
, d
)),
478 (('bcsel', a
, b
, ('bcsel', a
, c
, d
)), ('bcsel', a
, b
, d
)),
479 (('bcsel', a
, ('bcsel', b
, c
, d
), ('bcsel(is_used_once)', b
, c
, 'e')), ('bcsel', b
, c
, ('bcsel', a
, d
, 'e'))),
480 (('bcsel', a
, ('bcsel(is_used_once)', b
, c
, d
), ('bcsel', b
, c
, 'e')), ('bcsel', b
, c
, ('bcsel', a
, d
, 'e'))),
481 (('bcsel', a
, ('bcsel', b
, c
, d
), ('bcsel(is_used_once)', b
, 'e', d
)), ('bcsel', b
, ('bcsel', a
, c
, 'e'), d
)),
482 (('bcsel', a
, ('bcsel(is_used_once)', b
, c
, d
), ('bcsel', b
, 'e', d
)), ('bcsel', b
, ('bcsel', a
, c
, 'e'), d
)),
483 (('bcsel', a
, True, b
), ('ior', a
, b
)),
484 (('bcsel', a
, a
, b
), ('ior', a
, b
)),
485 (('bcsel', a
, b
, False), ('iand', a
, b
)),
486 (('bcsel', a
, b
, a
), ('iand', a
, b
)),
487 (('~fmin', a
, a
), a
),
488 (('~fmax', a
, a
), a
),
493 (('fmax', ('fmax', a
, b
), b
), ('fmax', a
, b
)),
494 (('umax', ('umax', a
, b
), b
), ('umax', a
, b
)),
495 (('imax', ('imax', a
, b
), b
), ('imax', a
, b
)),
496 (('fmin', ('fmin', a
, b
), b
), ('fmin', a
, b
)),
497 (('umin', ('umin', a
, b
), b
), ('umin', a
, b
)),
498 (('imin', ('imin', a
, b
), b
), ('imin', a
, b
)),
499 (('iand@32', a
, ('inot', ('ishr', a
, 31))), ('imax', a
, 0)),
501 # Simplify logic to detect sign of an integer.
502 (('ieq', ('iand', a
, 0x80000000), 0x00000000), ('ige', a
, 0)),
503 (('ine', ('iand', a
, 0x80000000), 0x80000000), ('ige', a
, 0)),
504 (('ine', ('iand', a
, 0x80000000), 0x00000000), ('ilt', a
, 0)),
505 (('ieq', ('iand', a
, 0x80000000), 0x80000000), ('ilt', a
, 0)),
506 (('ine', ('ushr', 'a@32', 31), 0), ('ilt', a
, 0)),
507 (('ieq', ('ushr', 'a@32', 31), 0), ('ige', a
, 0)),
508 (('ieq', ('ushr', 'a@32', 31), 1), ('ilt', a
, 0)),
509 (('ine', ('ushr', 'a@32', 31), 1), ('ige', a
, 0)),
510 (('ine', ('ishr', 'a@32', 31), 0), ('ilt', a
, 0)),
511 (('ieq', ('ishr', 'a@32', 31), 0), ('ige', a
, 0)),
512 (('ieq', ('ishr', 'a@32', 31), -1), ('ilt', a
, 0)),
513 (('ine', ('ishr', 'a@32', 31), -1), ('ige', a
, 0)),
515 (('fmin', a
, ('fneg', a
)), ('fneg', ('fabs', a
))),
516 (('imin', a
, ('ineg', a
)), ('ineg', ('iabs', a
))),
517 (('fmin', a
, ('fneg', ('fabs', a
))), ('fneg', ('fabs', a
))),
518 (('imin', a
, ('ineg', ('iabs', a
))), ('ineg', ('iabs', a
))),
519 (('~fmin', a
, ('fabs', a
)), a
),
520 (('imin', a
, ('iabs', a
)), a
),
521 (('~fmax', a
, ('fneg', ('fabs', a
))), a
),
522 (('imax', a
, ('ineg', ('iabs', a
))), a
),
523 (('fmax', a
, ('fabs', a
)), ('fabs', a
)),
524 (('imax', a
, ('iabs', a
)), ('iabs', a
)),
525 (('fmax', a
, ('fneg', a
)), ('fabs', a
)),
526 (('imax', a
, ('ineg', a
)), ('iabs', a
)),
527 (('~fmax', ('fabs', a
), 0.0), ('fabs', a
)),
528 (('~fmin', ('fmax', a
, 0.0), 1.0), ('fsat', a
), '!options->lower_fsat'),
529 (('~fmax', ('fmin', a
, 1.0), 0.0), ('fsat', a
), '!options->lower_fsat'),
530 (('~fmin', ('fmax', a
, -1.0), 0.0), ('fneg', ('fsat', ('fneg', a
))), '!options->lower_fsat'),
531 (('~fmax', ('fmin', a
, 0.0), -1.0), ('fneg', ('fsat', ('fneg', a
))), '!options->lower_fsat'),
532 (('fsat', ('fsign', a
)), ('b2f', ('flt', 0.0, a
))),
533 (('fsat', ('b2f', a
)), ('b2f', a
)),
534 (('fsat', a
), ('fmin', ('fmax', a
, 0.0), 1.0), 'options->lower_fsat'),
535 (('fsat', ('fsat', a
)), ('fsat', a
)),
536 (('fsat', ('fneg(is_used_once)', ('fadd(is_used_once)', a
, b
))), ('fsat', ('fadd', ('fneg', a
), ('fneg', b
))), '!options->lower_fsat'),
537 (('fsat', ('fneg(is_used_once)', ('fmul(is_used_once)', a
, b
))), ('fsat', ('fmul', ('fneg', a
), b
)), '!options->lower_fsat'),
538 (('fsat', ('fabs(is_used_once)', ('fmul(is_used_once)', a
, b
))), ('fsat', ('fmul', ('fabs', a
), ('fabs', b
))), '!options->lower_fsat'),
539 (('fmin', ('fmax', ('fmin', ('fmax', a
, b
), c
), b
), c
), ('fmin', ('fmax', a
, b
), c
)),
540 (('imin', ('imax', ('imin', ('imax', a
, b
), c
), b
), c
), ('imin', ('imax', a
, b
), c
)),
541 (('umin', ('umax', ('umin', ('umax', a
, b
), c
), b
), c
), ('umin', ('umax', a
, b
), c
)),
542 (('fmax', ('fsat', a
), '#b@32(is_zero_to_one)'), ('fsat', ('fmax', a
, b
))),
543 (('fmin', ('fsat', a
), '#b@32(is_zero_to_one)'), ('fsat', ('fmin', a
, b
))),
544 (('extract_u8', ('imin', ('imax', a
, 0), 0xff), 0), ('imin', ('imax', a
, 0), 0xff)),
545 (('~ior', ('flt(is_used_once)', a
, b
), ('flt', a
, c
)), ('flt', a
, ('fmax', b
, c
))),
546 (('~ior', ('flt(is_used_once)', a
, c
), ('flt', b
, c
)), ('flt', ('fmin', a
, b
), c
)),
547 (('~ior', ('fge(is_used_once)', a
, b
), ('fge', a
, c
)), ('fge', a
, ('fmin', b
, c
))),
548 (('~ior', ('fge(is_used_once)', a
, c
), ('fge', b
, c
)), ('fge', ('fmax', a
, b
), c
)),
549 (('~ior', ('flt', a
, '#b'), ('flt', a
, '#c')), ('flt', a
, ('fmax', b
, c
))),
550 (('~ior', ('flt', '#a', c
), ('flt', '#b', c
)), ('flt', ('fmin', a
, b
), c
)),
551 (('~ior', ('fge', a
, '#b'), ('fge', a
, '#c')), ('fge', a
, ('fmin', b
, c
))),
552 (('~ior', ('fge', '#a', c
), ('fge', '#b', c
)), ('fge', ('fmax', a
, b
), c
)),
553 (('~iand', ('flt(is_used_once)', a
, b
), ('flt', a
, c
)), ('flt', a
, ('fmin', b
, c
))),
554 (('~iand', ('flt(is_used_once)', a
, c
), ('flt', b
, c
)), ('flt', ('fmax', a
, b
), c
)),
555 (('~iand', ('fge(is_used_once)', a
, b
), ('fge', a
, c
)), ('fge', a
, ('fmax', b
, c
))),
556 (('~iand', ('fge(is_used_once)', a
, c
), ('fge', b
, c
)), ('fge', ('fmin', a
, b
), c
)),
557 (('~iand', ('flt', a
, '#b'), ('flt', a
, '#c')), ('flt', a
, ('fmin', b
, c
))),
558 (('~iand', ('flt', '#a', c
), ('flt', '#b', c
)), ('flt', ('fmax', a
, b
), c
)),
559 (('~iand', ('fge', a
, '#b'), ('fge', a
, '#c')), ('fge', a
, ('fmax', b
, c
))),
560 (('~iand', ('fge', '#a', c
), ('fge', '#b', c
)), ('fge', ('fmin', a
, b
), c
)),
562 (('ior', ('ilt(is_used_once)', a
, b
), ('ilt', a
, c
)), ('ilt', a
, ('imax', b
, c
))),
563 (('ior', ('ilt(is_used_once)', a
, c
), ('ilt', b
, c
)), ('ilt', ('imin', a
, b
), c
)),
564 (('ior', ('ige(is_used_once)', a
, b
), ('ige', a
, c
)), ('ige', a
, ('imin', b
, c
))),
565 (('ior', ('ige(is_used_once)', a
, c
), ('ige', b
, c
)), ('ige', ('imax', a
, b
), c
)),
566 (('ior', ('ult(is_used_once)', a
, b
), ('ult', a
, c
)), ('ult', a
, ('umax', b
, c
))),
567 (('ior', ('ult(is_used_once)', a
, c
), ('ult', b
, c
)), ('ult', ('umin', a
, b
), c
)),
568 (('ior', ('uge(is_used_once)', a
, b
), ('uge', a
, c
)), ('uge', a
, ('umin', b
, c
))),
569 (('ior', ('uge(is_used_once)', a
, c
), ('uge', b
, c
)), ('uge', ('umax', a
, b
), c
)),
570 (('iand', ('ilt(is_used_once)', a
, b
), ('ilt', a
, c
)), ('ilt', a
, ('imin', b
, c
))),
571 (('iand', ('ilt(is_used_once)', a
, c
), ('ilt', b
, c
)), ('ilt', ('imax', a
, b
), c
)),
572 (('iand', ('ige(is_used_once)', a
, b
), ('ige', a
, c
)), ('ige', a
, ('imax', b
, c
))),
573 (('iand', ('ige(is_used_once)', a
, c
), ('ige', b
, c
)), ('ige', ('imin', a
, b
), c
)),
574 (('iand', ('ult(is_used_once)', a
, b
), ('ult', a
, c
)), ('ult', a
, ('umin', b
, c
))),
575 (('iand', ('ult(is_used_once)', a
, c
), ('ult', b
, c
)), ('ult', ('umax', a
, b
), c
)),
576 (('iand', ('uge(is_used_once)', a
, b
), ('uge', a
, c
)), ('uge', a
, ('umax', b
, c
))),
577 (('iand', ('uge(is_used_once)', a
, c
), ('uge', b
, c
)), ('uge', ('umin', a
, b
), c
)),
579 # These derive from the previous patterns with the application of b < 0 <=>
580 # 0 < -b. The transformation should be applied if either comparison is
581 # used once as this ensures that the number of comparisons will not
582 # increase. The sources to the ior and iand are not symmetric, so the
583 # rules have to be duplicated to get this behavior.
584 (('~ior', ('flt(is_used_once)', 0.0, 'a@32'), ('flt', 'b@32', 0.0)), ('flt', 0.0, ('fmax', a
, ('fneg', b
)))),
585 (('~ior', ('flt', 0.0, 'a@32'), ('flt(is_used_once)', 'b@32', 0.0)), ('flt', 0.0, ('fmax', a
, ('fneg', b
)))),
586 (('~ior', ('fge(is_used_once)', 0.0, 'a@32'), ('fge', 'b@32', 0.0)), ('fge', 0.0, ('fmin', a
, ('fneg', b
)))),
587 (('~ior', ('fge', 0.0, 'a@32'), ('fge(is_used_once)', 'b@32', 0.0)), ('fge', 0.0, ('fmin', a
, ('fneg', b
)))),
588 (('~iand', ('flt(is_used_once)', 0.0, 'a@32'), ('flt', 'b@32', 0.0)), ('flt', 0.0, ('fmin', a
, ('fneg', b
)))),
589 (('~iand', ('flt', 0.0, 'a@32'), ('flt(is_used_once)', 'b@32', 0.0)), ('flt', 0.0, ('fmin', a
, ('fneg', b
)))),
590 (('~iand', ('fge(is_used_once)', 0.0, 'a@32'), ('fge', 'b@32', 0.0)), ('fge', 0.0, ('fmax', a
, ('fneg', b
)))),
591 (('~iand', ('fge', 0.0, 'a@32'), ('fge(is_used_once)', 'b@32', 0.0)), ('fge', 0.0, ('fmax', a
, ('fneg', b
)))),
593 # Common pattern like 'if (i == 0 || i == 1 || ...)'
594 (('ior', ('ieq', a
, 0), ('ieq', a
, 1)), ('uge', 1, a
)),
595 (('ior', ('uge', 1, a
), ('ieq', a
, 2)), ('uge', 2, a
)),
596 (('ior', ('uge', 2, a
), ('ieq', a
, 3)), ('uge', 3, a
)),
598 # The (i2f32, ...) part is an open-coded fsign. When that is combined with
599 # the bcsel, it's basically copysign(1.0, a). There is no copysign in NIR,
600 # so emit an open-coded version of that.
601 (('bcsel@32', ('feq', a
, 0.0), 1.0, ('i2f32', ('iadd', ('b2i32', ('flt', 0.0, 'a@32')), ('ineg', ('b2i32', ('flt', 'a@32', 0.0)))))),
602 ('ior', 0x3f800000, ('iand', a
, 0x80000000))),
604 (('ior', a
, ('ieq', a
, False)), True),
605 (('ior', a
, ('inot', a
)), -1),
607 (('ine', ('ineg', ('b2i32', 'a@1')), ('ineg', ('b2i32', 'b@1'))), ('ine', a
, b
)),
608 (('b2i32', ('ine', 'a@1', 'b@1')), ('b2i32', ('ixor', a
, b
))),
610 (('iand', ('ieq', 'a@32', 0), ('ieq', 'b@32', 0)), ('ieq', ('ior', 'a@32', 'b@32'), 0), '!options->lower_bitops'),
612 # These patterns can result when (a < b || a < c) => (a < min(b, c))
613 # transformations occur before constant propagation and loop-unrolling.
614 (('~flt', a
, ('fmax', b
, a
)), ('flt', a
, b
)),
615 (('~flt', ('fmin', a
, b
), a
), ('flt', b
, a
)),
616 (('~fge', a
, ('fmin', b
, a
)), True),
617 (('~fge', ('fmax', a
, b
), a
), True),
618 (('~flt', a
, ('fmin', b
, a
)), False),
619 (('~flt', ('fmax', a
, b
), a
), False),
620 (('~fge', a
, ('fmax', b
, a
)), ('fge', a
, b
)),
621 (('~fge', ('fmin', a
, b
), a
), ('fge', b
, a
)),
623 (('ilt', a
, ('imax', b
, a
)), ('ilt', a
, b
)),
624 (('ilt', ('imin', a
, b
), a
), ('ilt', b
, a
)),
625 (('ige', a
, ('imin', b
, a
)), True),
626 (('ige', ('imax', a
, b
), a
), True),
627 (('ult', a
, ('umax', b
, a
)), ('ult', a
, b
)),
628 (('ult', ('umin', a
, b
), a
), ('ult', b
, a
)),
629 (('uge', a
, ('umin', b
, a
)), True),
630 (('uge', ('umax', a
, b
), a
), True),
631 (('ilt', a
, ('imin', b
, a
)), False),
632 (('ilt', ('imax', a
, b
), a
), False),
633 (('ige', a
, ('imax', b
, a
)), ('ige', a
, b
)),
634 (('ige', ('imin', a
, b
), a
), ('ige', b
, a
)),
635 (('ult', a
, ('umin', b
, a
)), False),
636 (('ult', ('umax', a
, b
), a
), False),
637 (('uge', a
, ('umax', b
, a
)), ('uge', a
, b
)),
638 (('uge', ('umin', a
, b
), a
), ('uge', b
, a
)),
639 (('ult', a
, ('iand', b
, a
)), False),
640 (('ult', ('ior', a
, b
), a
), False),
641 (('uge', a
, ('iand', b
, a
)), True),
642 (('uge', ('ior', a
, b
), a
), True),
644 (('ilt', '#a', ('imax', '#b', c
)), ('ior', ('ilt', a
, b
), ('ilt', a
, c
))),
645 (('ilt', ('imin', '#a', b
), '#c'), ('ior', ('ilt', a
, c
), ('ilt', b
, c
))),
646 (('ige', '#a', ('imin', '#b', c
)), ('ior', ('ige', a
, b
), ('ige', a
, c
))),
647 (('ige', ('imax', '#a', b
), '#c'), ('ior', ('ige', a
, c
), ('ige', b
, c
))),
648 (('ult', '#a', ('umax', '#b', c
)), ('ior', ('ult', a
, b
), ('ult', a
, c
))),
649 (('ult', ('umin', '#a', b
), '#c'), ('ior', ('ult', a
, c
), ('ult', b
, c
))),
650 (('uge', '#a', ('umin', '#b', c
)), ('ior', ('uge', a
, b
), ('uge', a
, c
))),
651 (('uge', ('umax', '#a', b
), '#c'), ('ior', ('uge', a
, c
), ('uge', b
, c
))),
652 (('ilt', '#a', ('imin', '#b', c
)), ('iand', ('ilt', a
, b
), ('ilt', a
, c
))),
653 (('ilt', ('imax', '#a', b
), '#c'), ('iand', ('ilt', a
, c
), ('ilt', b
, c
))),
654 (('ige', '#a', ('imax', '#b', c
)), ('iand', ('ige', a
, b
), ('ige', a
, c
))),
655 (('ige', ('imin', '#a', b
), '#c'), ('iand', ('ige', a
, c
), ('ige', b
, c
))),
656 (('ult', '#a', ('umin', '#b', c
)), ('iand', ('ult', a
, b
), ('ult', a
, c
))),
657 (('ult', ('umax', '#a', b
), '#c'), ('iand', ('ult', a
, c
), ('ult', b
, c
))),
658 (('uge', '#a', ('umax', '#b', c
)), ('iand', ('uge', a
, b
), ('uge', a
, c
))),
659 (('uge', ('umin', '#a', b
), '#c'), ('iand', ('uge', a
, c
), ('uge', b
, c
))),
661 # Thanks to sign extension, the ishr(a, b) is negative if and only if a is
663 (('bcsel', ('ilt', a
, 0), ('ineg', ('ishr', a
, b
)), ('ishr', a
, b
)),
664 ('iabs', ('ishr', a
, b
))),
665 (('iabs', ('ishr', ('iabs', a
), b
)), ('ishr', ('iabs', a
), b
)),
667 (('fabs', ('slt', a
, b
)), ('slt', a
, b
)),
668 (('fabs', ('sge', a
, b
)), ('sge', a
, b
)),
669 (('fabs', ('seq', a
, b
)), ('seq', a
, b
)),
670 (('fabs', ('sne', a
, b
)), ('sne', a
, b
)),
671 (('slt', a
, b
), ('b2f', ('flt', a
, b
)), 'options->lower_scmp'),
672 (('sge', a
, b
), ('b2f', ('fge', a
, b
)), 'options->lower_scmp'),
673 (('seq', a
, b
), ('b2f', ('feq', a
, b
)), 'options->lower_scmp'),
674 (('sne', a
, b
), ('b2f', ('fne', a
, b
)), 'options->lower_scmp'),
675 (('seq', ('seq', a
, b
), 1.0), ('seq', a
, b
)),
676 (('seq', ('sne', a
, b
), 1.0), ('sne', a
, b
)),
677 (('seq', ('slt', a
, b
), 1.0), ('slt', a
, b
)),
678 (('seq', ('sge', a
, b
), 1.0), ('sge', a
, b
)),
679 (('sne', ('seq', a
, b
), 0.0), ('seq', a
, b
)),
680 (('sne', ('sne', a
, b
), 0.0), ('sne', a
, b
)),
681 (('sne', ('slt', a
, b
), 0.0), ('slt', a
, b
)),
682 (('sne', ('sge', a
, b
), 0.0), ('sge', a
, b
)),
683 (('seq', ('seq', a
, b
), 0.0), ('sne', a
, b
)),
684 (('seq', ('sne', a
, b
), 0.0), ('seq', a
, b
)),
685 (('seq', ('slt', a
, b
), 0.0), ('sge', a
, b
)),
686 (('seq', ('sge', a
, b
), 0.0), ('slt', a
, b
)),
687 (('sne', ('seq', a
, b
), 1.0), ('sne', a
, b
)),
688 (('sne', ('sne', a
, b
), 1.0), ('seq', a
, b
)),
689 (('sne', ('slt', a
, b
), 1.0), ('sge', a
, b
)),
690 (('sne', ('sge', a
, b
), 1.0), ('slt', a
, b
)),
691 (('fall_equal2', a
, b
), ('fmin', ('seq', 'a.x', 'b.x'), ('seq', 'a.y', 'b.y')), 'options->lower_vector_cmp'),
692 (('fall_equal3', a
, b
), ('seq', ('fany_nequal3', a
, b
), 0.0), 'options->lower_vector_cmp'),
693 (('fall_equal4', a
, b
), ('seq', ('fany_nequal4', a
, b
), 0.0), 'options->lower_vector_cmp'),
694 (('fany_nequal2', a
, b
), ('fmax', ('sne', 'a.x', 'b.x'), ('sne', 'a.y', 'b.y')), 'options->lower_vector_cmp'),
695 (('fany_nequal3', a
, b
), ('fsat', ('fdot3', ('sne', a
, b
), ('sne', a
, b
))), 'options->lower_vector_cmp'),
696 (('fany_nequal4', a
, b
), ('fsat', ('fdot4', ('sne', a
, b
), ('sne', a
, b
))), 'options->lower_vector_cmp'),
697 (('fne', ('fneg', a
), a
), ('fne', a
, 0.0)),
698 (('feq', ('fneg', a
), a
), ('feq', a
, 0.0)),
700 (('imul', ('b2i', 'a@1'), ('b2i', 'b@1')), ('b2i', ('iand', a
, b
))),
701 (('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), ('b2f', ('iand', a
, b
))),
702 (('fsat', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), ('b2f', ('ior', a
, b
))),
703 (('iand', 'a@bool32', 1.0), ('b2f', a
)),
704 # True/False are ~0 and 0 in NIR. b2i of True is 1, and -1 is ~0 (True).
705 (('ineg', ('b2i32', 'a@32')), a
),
706 (('flt', ('fneg', ('b2f', 'a@1')), 0), a
), # Generated by TGSI KILL_IF.
707 # Comparison with the same args. Note that these are not done for
708 # the float versions because NaN always returns false on float
710 (('ilt', a
, a
), False),
711 (('ige', a
, a
), True),
712 (('ieq', a
, a
), True),
713 (('ine', a
, a
), False),
714 (('ult', a
, a
), False),
715 (('uge', a
, a
), True),
716 # Logical and bit operations
718 (('iand', a
, ~
0), a
),
722 (('ior', a
, True), True),
725 (('inot', ('inot', a
)), a
),
726 (('ior', ('iand', a
, b
), b
), b
),
727 (('ior', ('ior', a
, b
), b
), ('ior', a
, b
)),
728 (('iand', ('ior', a
, b
), b
), b
),
729 (('iand', ('iand', a
, b
), b
), ('iand', a
, b
)),
731 (('iand', ('inot', a
), ('inot', b
)), ('inot', ('ior', a
, b
))),
732 (('ior', ('inot', a
), ('inot', b
)), ('inot', ('iand', a
, b
))),
733 # Shift optimizations
740 (('iand', 0xff, ('ushr@32', a
, 24)), ('ushr', a
, 24)),
741 (('iand', 0xffff, ('ushr@32', a
, 16)), ('ushr', a
, 16)),
742 (('ior', ('ishl@16', a
, b
), ('ushr@16', a
, ('iadd', 16, ('ineg', b
)))), ('urol', a
, b
), '!options->lower_rotate'),
743 (('ior', ('ishl@16', a
, b
), ('ushr@16', a
, ('isub', 16, b
))), ('urol', a
, b
), '!options->lower_rotate'),
744 (('ior', ('ishl@32', a
, b
), ('ushr@32', a
, ('iadd', 32, ('ineg', b
)))), ('urol', a
, b
), '!options->lower_rotate'),
745 (('ior', ('ishl@32', a
, b
), ('ushr@32', a
, ('isub', 32, b
))), ('urol', a
, b
), '!options->lower_rotate'),
746 (('ior', ('ushr@16', a
, b
), ('ishl@16', a
, ('iadd', 16, ('ineg', b
)))), ('uror', a
, b
), '!options->lower_rotate'),
747 (('ior', ('ushr@16', a
, b
), ('ishl@16', a
, ('isub', 16, b
))), ('uror', a
, b
), '!options->lower_rotate'),
748 (('ior', ('ushr@32', a
, b
), ('ishl@32', a
, ('iadd', 32, ('ineg', b
)))), ('uror', a
, b
), '!options->lower_rotate'),
749 (('ior', ('ushr@32', a
, b
), ('ishl@32', a
, ('isub', 32, b
))), ('uror', a
, b
), '!options->lower_rotate'),
750 (('urol@16', a
, b
), ('ior', ('ishl', a
, b
), ('ushr', a
, ('isub', 16, b
))), 'options->lower_rotate'),
751 (('urol@32', a
, b
), ('ior', ('ishl', a
, b
), ('ushr', a
, ('isub', 32, b
))), 'options->lower_rotate'),
752 (('uror@16', a
, b
), ('ior', ('ushr', a
, b
), ('ishl', a
, ('isub', 16, b
))), 'options->lower_rotate'),
753 (('uror@32', a
, b
), ('ior', ('ushr', a
, b
), ('ishl', a
, ('isub', 32, b
))), 'options->lower_rotate'),
754 # Exponential/logarithmic identities
755 (('~fexp2', ('flog2', a
)), a
), # 2^lg2(a) = a
756 (('~flog2', ('fexp2', a
)), a
), # lg2(2^a) = a
757 (('fpow', a
, b
), ('fexp2', ('fmul', ('flog2', a
), b
)), 'options->lower_fpow'), # a^b = 2^(lg2(a)*b)
758 (('~fexp2', ('fmul', ('flog2', a
), b
)), ('fpow', a
, b
), '!options->lower_fpow'), # 2^(lg2(a)*b) = a^b
759 (('~fexp2', ('fadd', ('fmul', ('flog2', a
), b
), ('fmul', ('flog2', c
), d
))),
760 ('~fmul', ('fpow', a
, b
), ('fpow', c
, d
)), '!options->lower_fpow'), # 2^(lg2(a) * b + lg2(c) + d) = a^b * c^d
761 (('~fexp2', ('fmul', ('flog2', a
), 2.0)), ('fmul', a
, a
)),
762 (('~fexp2', ('fmul', ('flog2', a
), 4.0)), ('fmul', ('fmul', a
, a
), ('fmul', a
, a
))),
763 (('~fpow', a
, 1.0), a
),
764 (('~fpow', a
, 2.0), ('fmul', a
, a
)),
765 (('~fpow', a
, 4.0), ('fmul', ('fmul', a
, a
), ('fmul', a
, a
))),
766 (('~fpow', 2.0, a
), ('fexp2', a
)),
767 (('~fpow', ('fpow', a
, 2.2), 0.454545), a
),
768 (('~fpow', ('fabs', ('fpow', a
, 2.2)), 0.454545), ('fabs', a
)),
769 (('~fsqrt', ('fexp2', a
)), ('fexp2', ('fmul', 0.5, a
))),
770 (('~frcp', ('fexp2', a
)), ('fexp2', ('fneg', a
))),
771 (('~frsq', ('fexp2', a
)), ('fexp2', ('fmul', -0.5, a
))),
772 (('~flog2', ('fsqrt', a
)), ('fmul', 0.5, ('flog2', a
))),
773 (('~flog2', ('frcp', a
)), ('fneg', ('flog2', a
))),
774 (('~flog2', ('frsq', a
)), ('fmul', -0.5, ('flog2', a
))),
775 (('~flog2', ('fpow', a
, b
)), ('fmul', b
, ('flog2', a
))),
776 (('~fmul', ('fexp2(is_used_once)', a
), ('fexp2(is_used_once)', b
)), ('fexp2', ('fadd', a
, b
))),
777 (('bcsel', ('flt', a
, 0.0), 0.0, ('fsqrt', a
)), ('fsqrt', ('fmax', a
, 0.0))),
778 (('~fmul', ('fsqrt', a
), ('fsqrt', a
)), ('fabs',a
)),
779 # Division and reciprocal
780 (('~fdiv', 1.0, a
), ('frcp', a
)),
781 (('fdiv', a
, b
), ('fmul', a
, ('frcp', b
)), 'options->lower_fdiv'),
782 (('~frcp', ('frcp', a
)), a
),
783 (('~frcp', ('fsqrt', a
)), ('frsq', a
)),
784 (('fsqrt', a
), ('frcp', ('frsq', a
)), 'options->lower_fsqrt'),
785 (('~frcp', ('frsq', a
)), ('fsqrt', a
), '!options->lower_fsqrt'),
787 (('fsin', a
), lowered_sincos(0.5), 'options->lower_sincos'),
788 (('fcos', a
), lowered_sincos(0.75), 'options->lower_sincos'),
789 # Boolean simplifications
790 (('i2b32(is_used_by_if)', a
), ('ine32', a
, 0)),
791 (('i2b1(is_used_by_if)', a
), ('ine', a
, 0)),
792 (('ieq', a
, True), a
),
793 (('ine(is_not_used_by_if)', a
, True), ('inot', a
)),
794 (('ine', a
, False), a
),
795 (('ieq(is_not_used_by_if)', a
, False), ('inot', 'a')),
796 (('bcsel', a
, True, False), a
),
797 (('bcsel', a
, False, True), ('inot', a
)),
798 (('bcsel@32', a
, 1.0, 0.0), ('b2f', a
)),
799 (('bcsel@32', a
, 0.0, 1.0), ('b2f', ('inot', a
))),
800 (('bcsel@32', a
, -1.0, -0.0), ('fneg', ('b2f', a
))),
801 (('bcsel@32', a
, -0.0, -1.0), ('fneg', ('b2f', ('inot', a
)))),
802 (('bcsel', True, b
, c
), b
),
803 (('bcsel', False, b
, c
), c
),
804 (('bcsel', a
, ('b2f(is_used_once)', 'b@32'), ('b2f', 'c@32')), ('b2f', ('bcsel', a
, b
, c
))),
806 (('bcsel', a
, b
, b
), b
),
807 (('~fcsel', a
, b
, b
), b
),
809 # D3D Boolean emulation
810 (('bcsel', a
, -1, 0), ('ineg', ('b2i', 'a@1'))),
811 (('bcsel', a
, 0, -1), ('ineg', ('b2i', ('inot', a
)))),
812 (('iand', ('ineg', ('b2i', 'a@1')), ('ineg', ('b2i', 'b@1'))),
813 ('ineg', ('b2i', ('iand', a
, b
)))),
814 (('ior', ('ineg', ('b2i','a@1')), ('ineg', ('b2i', 'b@1'))),
815 ('ineg', ('b2i', ('ior', a
, b
)))),
816 (('ieq', ('ineg', ('b2i', 'a@1')), 0), ('inot', a
)),
817 (('ieq', ('ineg', ('b2i', 'a@1')), -1), a
),
818 (('ine', ('ineg', ('b2i', 'a@1')), 0), a
),
819 (('ine', ('ineg', ('b2i', 'a@1')), -1), ('inot', a
)),
820 (('iand', ('ineg', ('b2i', a
)), 1.0), ('b2f', a
)),
821 (('iand', ('ineg', ('b2i', a
)), 1), ('b2i', a
)),
823 # SM5 32-bit shifts are defined to use the 5 least significant bits
824 (('ishl', 'a@32', ('iand', 31, b
)), ('ishl', a
, b
)),
825 (('ishr', 'a@32', ('iand', 31, b
)), ('ishr', a
, b
)),
826 (('ushr', 'a@32', ('iand', 31, b
)), ('ushr', a
, b
)),
829 (('i2b32', ('b2i', 'a@32')), a
),
830 (('f2i', ('ftrunc', a
)), ('f2i', a
)),
831 (('f2u', ('ftrunc', a
)), ('f2u', a
)),
832 (('i2b', ('ineg', a
)), ('i2b', a
)),
833 (('i2b', ('iabs', a
)), ('i2b', a
)),
834 (('inot', ('f2b1', a
)), ('feq', a
, 0.0)),
836 # The C spec says, "If the value of the integral part cannot be represented
837 # by the integer type, the behavior is undefined." "Undefined" can mean
838 # "the conversion doesn't happen at all."
839 (('~i2f32', ('f2i32', 'a@32')), ('ftrunc', a
)),
841 # Ironically, mark these as imprecise because removing the conversions may
842 # preserve more precision than doing the conversions (e.g.,
843 # uint(float(0x81818181u)) == 0x81818200).
844 (('~f2i32', ('i2f', 'a@32')), a
),
845 (('~f2i32', ('u2f', 'a@32')), a
),
846 (('~f2u32', ('i2f', 'a@32')), a
),
847 (('~f2u32', ('u2f', 'a@32')), a
),
849 # Conversions from float16 to float32 and back can always be removed
850 (('f2f16', ('f2f32', 'a@16')), a
),
851 (('f2fmp', ('f2f32', 'a@16')), a
),
852 # Conversions to float16 would be lossy so they should only be removed if
853 # the instruction was generated by the precision lowering pass.
854 (('f2f32', ('f2fmp', 'a@32')), a
),
856 (('ffloor', 'a(is_integral)'), a
),
857 (('fceil', 'a(is_integral)'), a
),
858 (('ftrunc', 'a(is_integral)'), a
),
859 # fract(x) = x - floor(x), so fract(NaN) = NaN
860 (('~ffract', 'a(is_integral)'), 0.0),
861 (('fabs', 'a(is_not_negative)'), a
),
862 (('iabs', 'a(is_not_negative)'), a
),
863 (('fsat', 'a(is_not_positive)'), 0.0),
865 # Section 5.4.1 (Conversion and Scalar Constructors) of the GLSL 4.60 spec
868 # It is undefined to convert a negative floating-point value to an
871 # Assuming that (uint)some_float behaves like (uint)(int)some_float allows
872 # some optimizations in the i965 backend to proceed.
873 (('ige', ('f2u', a
), b
), ('ige', ('f2i', a
), b
)),
874 (('ige', b
, ('f2u', a
)), ('ige', b
, ('f2i', a
))),
875 (('ilt', ('f2u', a
), b
), ('ilt', ('f2i', a
), b
)),
876 (('ilt', b
, ('f2u', a
)), ('ilt', b
, ('f2i', a
))),
878 (('~fmin', 'a(is_not_negative)', 1.0), ('fsat', a
), '!options->lower_fsat'),
880 # The result of the multiply must be in [-1, 0], so the result of the ffma
882 (('flt', ('fadd', ('fmul', ('fsat', a
), ('fneg', ('fsat', a
))), 1.0), 0.0), False),
883 (('flt', ('fadd', ('fneg', ('fmul', ('fsat', a
), ('fsat', a
))), 1.0), 0.0), False),
884 (('fmax', ('fadd', ('fmul', ('fsat', a
), ('fneg', ('fsat', a
))), 1.0), 0.0), ('fadd', ('fmul', ('fsat', a
), ('fneg', ('fsat', a
))), 1.0)),
885 (('fmax', ('fadd', ('fneg', ('fmul', ('fsat', a
), ('fsat', a
))), 1.0), 0.0), ('fadd', ('fneg', ('fmul', ('fsat', a
), ('fsat', a
))), 1.0)),
887 (('fne', 'a(is_not_zero)', 0.0), True),
888 (('feq', 'a(is_not_zero)', 0.0), False),
890 # In this chart, + means value > 0 and - means value < 0.
892 # + >= + -> unknown 0 >= + -> false - >= + -> false
893 # + >= 0 -> true 0 >= 0 -> true - >= 0 -> false
894 # + >= - -> true 0 >= - -> true - >= - -> unknown
896 # Using grouping conceptually similar to a Karnaugh map...
898 # (+ >= 0, + >= -, 0 >= 0, 0 >= -) == (is_not_negative >= is_not_positive) -> true
899 # (0 >= +, - >= +) == (is_not_positive >= gt_zero) -> false
900 # (- >= +, - >= 0) == (lt_zero >= is_not_negative) -> false
902 # The flt / ilt cases just invert the expected result.
904 # The results expecting true, must be marked imprecise. The results
905 # expecting false are fine because NaN compared >= or < anything is false.
907 (('~fge', 'a(is_not_negative)', 'b(is_not_positive)'), True),
908 (('fge', 'a(is_not_positive)', 'b(is_gt_zero)'), False),
909 (('fge', 'a(is_lt_zero)', 'b(is_not_negative)'), False),
911 (('flt', 'a(is_not_negative)', 'b(is_not_positive)'), False),
912 (('~flt', 'a(is_not_positive)', 'b(is_gt_zero)'), True),
913 (('~flt', 'a(is_lt_zero)', 'b(is_not_negative)'), True),
915 (('ine', 'a(is_not_zero)', 0), True),
916 (('ieq', 'a(is_not_zero)', 0), False),
918 (('ige', 'a(is_not_negative)', 'b(is_not_positive)'), True),
919 (('ige', 'a(is_not_positive)', 'b(is_gt_zero)'), False),
920 (('ige', 'a(is_lt_zero)', 'b(is_not_negative)'), False),
922 (('ilt', 'a(is_not_negative)', 'b(is_not_positive)'), False),
923 (('ilt', 'a(is_not_positive)', 'b(is_gt_zero)'), True),
924 (('ilt', 'a(is_lt_zero)', 'b(is_not_negative)'), True),
926 (('ult', 0, 'a(is_gt_zero)'), True),
928 # Packing and then unpacking does nothing
929 (('unpack_64_2x32_split_x', ('pack_64_2x32_split', a
, b
)), a
),
930 (('unpack_64_2x32_split_y', ('pack_64_2x32_split', a
, b
)), b
),
931 (('pack_64_2x32_split', ('unpack_64_2x32_split_x', a
),
932 ('unpack_64_2x32_split_y', a
)), a
),
934 # Comparing two halves of an unpack separately. While this optimization
935 # should be correct for non-constant values, it's less obvious that it's
936 # useful in that case. For constant values, the pack will fold and we're
937 # guaranteed to reduce the whole tree to one instruction.
938 (('iand', ('ieq', ('unpack_32_2x16_split_x', a
), '#b'),
939 ('ieq', ('unpack_32_2x16_split_y', a
), '#c')),
940 ('ieq', a
, ('pack_32_2x16_split', b
, c
))),
943 (('ushr', 'a@16', 8), ('extract_u8', a
, 1), '!options->lower_extract_byte'),
944 (('ushr', 'a@32', 24), ('extract_u8', a
, 3), '!options->lower_extract_byte'),
945 (('ushr', 'a@64', 56), ('extract_u8', a
, 7), '!options->lower_extract_byte'),
946 (('ishr', 'a@16', 8), ('extract_i8', a
, 1), '!options->lower_extract_byte'),
947 (('ishr', 'a@32', 24), ('extract_i8', a
, 3), '!options->lower_extract_byte'),
948 (('ishr', 'a@64', 56), ('extract_i8', a
, 7), '!options->lower_extract_byte'),
949 (('iand', 0xff, a
), ('extract_u8', a
, 0), '!options->lower_extract_byte'),
951 # Useless masking before unpacking
952 (('unpack_half_2x16_split_x', ('iand', a
, 0xffff)), ('unpack_half_2x16_split_x', a
)),
953 (('unpack_32_2x16_split_x', ('iand', a
, 0xffff)), ('unpack_32_2x16_split_x', a
)),
954 (('unpack_64_2x32_split_x', ('iand', a
, 0xffffffff)), ('unpack_64_2x32_split_x', a
)),
955 (('unpack_half_2x16_split_y', ('iand', a
, 0xffff0000)), ('unpack_half_2x16_split_y', a
)),
956 (('unpack_32_2x16_split_y', ('iand', a
, 0xffff0000)), ('unpack_32_2x16_split_y', a
)),
957 (('unpack_64_2x32_split_y', ('iand', a
, 0xffffffff00000000)), ('unpack_64_2x32_split_y', a
)),
959 # Optimize half packing
960 (('ishl', ('pack_half_2x16', ('vec2', a
, 0)), 16), ('pack_half_2x16', ('vec2', 0, a
))),
961 (('ishr', ('pack_half_2x16', ('vec2', 0, a
)), 16), ('pack_half_2x16', ('vec2', a
, 0))),
963 (('iadd', ('pack_half_2x16', ('vec2', a
, 0)), ('pack_half_2x16', ('vec2', 0, b
))),
964 ('pack_half_2x16', ('vec2', a
, b
))),
965 (('ior', ('pack_half_2x16', ('vec2', a
, 0)), ('pack_half_2x16', ('vec2', 0, b
))),
966 ('pack_half_2x16', ('vec2', a
, b
))),
969 # After the ('extract_u8', a, 0) pattern, above, triggers, there will be
970 # patterns like those below.
971 for op
in ('ushr', 'ishr'):
972 optimizations
.extend([(('extract_u8', (op
, 'a@16', 8), 0), ('extract_u8', a
, 1))])
973 optimizations
.extend([(('extract_u8', (op
, 'a@32', 8 * i
), 0), ('extract_u8', a
, i
)) for i
in range(1, 4)])
974 optimizations
.extend([(('extract_u8', (op
, 'a@64', 8 * i
), 0), ('extract_u8', a
, i
)) for i
in range(1, 8)])
976 optimizations
.extend([(('extract_u8', ('extract_u16', a
, 1), 0), ('extract_u8', a
, 2))])
978 # After the ('extract_[iu]8', a, 3) patterns, above, trigger, there will be
979 # patterns like those below.
980 for op
in ('extract_u8', 'extract_i8'):
981 optimizations
.extend([((op
, ('ishl', 'a@16', 8), 1), (op
, a
, 0))])
982 optimizations
.extend([((op
, ('ishl', 'a@32', 24 - 8 * i
), 3), (op
, a
, i
)) for i
in range(2, -1, -1)])
983 optimizations
.extend([((op
, ('ishl', 'a@64', 56 - 8 * i
), 7), (op
, a
, i
)) for i
in range(6, -1, -1)])
985 optimizations
.extend([
987 (('ushr', ('ishl', 'a@32', 16), 16), ('extract_u16', a
, 0), '!options->lower_extract_word'),
988 (('ushr', 'a@32', 16), ('extract_u16', a
, 1), '!options->lower_extract_word'),
989 (('ishr', ('ishl', 'a@32', 16), 16), ('extract_i16', a
, 0), '!options->lower_extract_word'),
990 (('ishr', 'a@32', 16), ('extract_i16', a
, 1), '!options->lower_extract_word'),
991 (('iand', 0xffff, a
), ('extract_u16', a
, 0), '!options->lower_extract_word'),
994 (('ussub_4x8', a
, 0), a
),
995 (('ussub_4x8', a
, ~
0), 0),
996 # Lower all Subtractions first - they can get recombined later
997 (('fsub', a
, b
), ('fadd', a
, ('fneg', b
))),
998 (('isub', a
, b
), ('iadd', a
, ('ineg', b
))),
999 (('uabs_usub', a
, b
), ('bcsel', ('ult', a
, b
), ('ineg', ('isub', a
, b
)), ('isub', a
, b
))),
1000 # This is correct. We don't need isub_sat because the result type is unsigned, so it cannot overflow.
1001 (('uabs_isub', a
, b
), ('bcsel', ('ilt', a
, b
), ('ineg', ('isub', a
, b
)), ('isub', a
, b
))),
1003 # Propagate negation up multiplication chains
1004 (('fmul(is_used_by_non_fsat)', ('fneg', a
), b
), ('fneg', ('fmul', a
, b
))),
1005 (('imul', ('ineg', a
), b
), ('ineg', ('imul', a
, b
))),
1007 # Propagate constants up multiplication chains
1008 (('~fmul(is_used_once)', ('fmul(is_used_once)', 'a(is_not_const)', 'b(is_not_const)'), '#c'), ('fmul', ('fmul', a
, c
), b
)),
1009 (('imul(is_used_once)', ('imul(is_used_once)', 'a(is_not_const)', 'b(is_not_const)'), '#c'), ('imul', ('imul', a
, c
), b
)),
1010 (('~fadd(is_used_once)', ('fadd(is_used_once)', 'a(is_not_const)', 'b(is_not_const)'), '#c'), ('fadd', ('fadd', a
, c
), b
)),
1011 (('iadd(is_used_once)', ('iadd(is_used_once)', 'a(is_not_const)', 'b(is_not_const)'), '#c'), ('iadd', ('iadd', a
, c
), b
)),
1013 # Reassociate constants in add/mul chains so they can be folded together.
1014 # For now, we mostly only handle cases where the constants are separated by
1015 # a single non-constant. We could do better eventually.
1016 (('~fmul', '#a', ('fmul', 'b(is_not_const)', '#c')), ('fmul', ('fmul', a
, c
), b
)),
1017 (('imul', '#a', ('imul', 'b(is_not_const)', '#c')), ('imul', ('imul', a
, c
), b
)),
1018 (('~fadd', '#a', ('fadd', 'b(is_not_const)', '#c')), ('fadd', ('fadd', a
, c
), b
)),
1019 (('~fadd', '#a', ('fneg', ('fadd', 'b(is_not_const)', '#c'))), ('fadd', ('fadd', a
, ('fneg', c
)), ('fneg', b
))),
1020 (('iadd', '#a', ('iadd', 'b(is_not_const)', '#c')), ('iadd', ('iadd', a
, c
), b
)),
1022 # Drop mul-div by the same value when there's no wrapping.
1023 (('idiv', ('imul(no_signed_wrap)', a
, b
), b
), a
),
1026 (('bcsel', ('ige', ('find_lsb', a
), 0), ('find_lsb', a
), -1), ('find_lsb', a
)),
1027 (('bcsel', ('ige', ('ifind_msb', a
), 0), ('ifind_msb', a
), -1), ('ifind_msb', a
)),
1028 (('bcsel', ('ige', ('ufind_msb', a
), 0), ('ufind_msb', a
), -1), ('ufind_msb', a
)),
1030 (('bcsel', ('ine', a
, 0), ('find_lsb', a
), -1), ('find_lsb', a
)),
1031 (('bcsel', ('ine', a
, 0), ('ifind_msb', a
), -1), ('ifind_msb', a
)),
1032 (('bcsel', ('ine', a
, 0), ('ufind_msb', a
), -1), ('ufind_msb', a
)),
1034 (('bcsel', ('ine', a
, -1), ('ifind_msb', a
), -1), ('ifind_msb', a
)),
1037 (('fmod', a
, b
), ('fsub', a
, ('fmul', b
, ('ffloor', ('fdiv', a
, b
)))), 'options->lower_fmod'),
1038 (('frem', a
, b
), ('fsub', a
, ('fmul', b
, ('ftrunc', ('fdiv', a
, b
)))), 'options->lower_fmod'),
1039 (('uadd_carry@32', a
, b
), ('b2i', ('ult', ('iadd', a
, b
), a
)), 'options->lower_uadd_carry'),
1040 (('usub_borrow@32', a
, b
), ('b2i', ('ult', a
, b
)), 'options->lower_usub_borrow'),
1042 (('bitfield_insert', 'base', 'insert', 'offset', 'bits'),
1043 ('bcsel', ('ult', 31, 'bits'), 'insert',
1044 ('bfi', ('bfm', 'bits', 'offset'), 'insert', 'base')),
1045 'options->lower_bitfield_insert'),
1046 (('ihadd', a
, b
), ('iadd', ('iand', a
, b
), ('ishr', ('ixor', a
, b
), 1)), 'options->lower_hadd'),
1047 (('uhadd', a
, b
), ('iadd', ('iand', a
, b
), ('ushr', ('ixor', a
, b
), 1)), 'options->lower_hadd'),
1048 (('irhadd', a
, b
), ('isub', ('ior', a
, b
), ('ishr', ('ixor', a
, b
), 1)), 'options->lower_hadd'),
1049 (('urhadd', a
, b
), ('isub', ('ior', a
, b
), ('ushr', ('ixor', a
, b
), 1)), 'options->lower_hadd'),
1050 (('ihadd@64', a
, b
), ('iadd', ('iand', a
, b
), ('ishr', ('ixor', a
, b
), 1)), 'options->lower_hadd64 || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1051 (('uhadd@64', a
, b
), ('iadd', ('iand', a
, b
), ('ushr', ('ixor', a
, b
), 1)), 'options->lower_hadd64 || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1052 (('irhadd@64', a
, b
), ('isub', ('ior', a
, b
), ('ishr', ('ixor', a
, b
), 1)), 'options->lower_hadd64 || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1053 (('urhadd@64', a
, b
), ('isub', ('ior', a
, b
), ('ushr', ('ixor', a
, b
), 1)), 'options->lower_hadd64 || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1055 (('uadd_sat@64', a
, b
), ('bcsel', ('ult', ('iadd', a
, b
), a
), -1, ('iadd', a
, b
)), 'options->lower_add_sat || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1056 (('uadd_sat', a
, b
), ('bcsel', ('ult', ('iadd', a
, b
), a
), -1, ('iadd', a
, b
)), 'options->lower_add_sat'),
1057 (('usub_sat', a
, b
), ('bcsel', ('ult', a
, b
), 0, ('isub', a
, b
)), 'options->lower_add_sat'),
1058 (('usub_sat@64', a
, b
), ('bcsel', ('ult', a
, b
), 0, ('isub', a
, b
)), 'options->lower_usub_sat64 || (options->lower_int64_options & nir_lower_iadd64) != 0'),
1060 # int64_t sum = a + b;
1062 # if (a < 0 && b < 0 && a < sum)
1064 # } else if (a >= 0 && b >= 0 && sum < a)
1068 # A couple optimizations are applied.
1070 # 1. a < sum => sum >= 0. This replacement works because it is known that
1071 # a < 0 and b < 0, so sum should also be < 0 unless there was
1074 # 2. sum < a => sum < 0. This replacement works because it is known that
1075 # a >= 0 and b >= 0, so sum should also be >= 0 unless there was
1078 # 3. Invert the second if-condition and swap the order of parameters for
1079 # the bcsel. !(a >= 0 && b >= 0 && sum < 0) becomes !(a >= 0) || !(b >=
1080 # 0) || !(sum < 0), and that becomes (a < 0) || (b < 0) || (sum >= 0)
1082 # On Intel Gen11, this saves ~11 instructions.
1083 (('iadd_sat@64', a
, b
), ('bcsel',
1084 ('iand', ('iand', ('ilt', a
, 0), ('ilt', b
, 0)), ('ige', ('iadd', a
, b
), 0)),
1087 ('ior', ('ior', ('ilt', a
, 0), ('ilt', b
, 0)), ('ige', ('iadd', a
, b
), 0)),
1089 0x7fffffffffffffff)),
1090 '(options->lower_int64_options & nir_lower_iadd64) != 0'),
1092 # int64_t sum = a - b;
1094 # if (a < 0 && b >= 0 && a < sum)
1096 # } else if (a >= 0 && b < 0 && a >= sum)
1100 # Optimizations similar to the iadd_sat case are applied here.
1101 (('isub_sat@64', a
, b
), ('bcsel',
1102 ('iand', ('iand', ('ilt', a
, 0), ('ige', b
, 0)), ('ige', ('isub', a
, b
), 0)),
1105 ('ior', ('ior', ('ilt', a
, 0), ('ige', b
, 0)), ('ige', ('isub', a
, b
), 0)),
1107 0x7fffffffffffffff)),
1108 '(options->lower_int64_options & nir_lower_iadd64) != 0'),
1110 # These are done here instead of in the backend because the int64 lowering
1111 # pass will make a mess of the patterns. The first patterns are
1112 # conditioned on nir_lower_minmax64 because it was not clear that it was
1113 # always an improvement on platforms that have real int64 support. No
1114 # shaders in shader-db hit this, so it was hard to say one way or the
1116 (('ilt', ('imax(is_used_once)', 'a@64', 'b@64'), 0), ('ilt', ('imax', ('unpack_64_2x32_split_y', a
), ('unpack_64_2x32_split_y', b
)), 0), '(options->lower_int64_options & nir_lower_minmax64) != 0'),
1117 (('ilt', ('imin(is_used_once)', 'a@64', 'b@64'), 0), ('ilt', ('imin', ('unpack_64_2x32_split_y', a
), ('unpack_64_2x32_split_y', b
)), 0), '(options->lower_int64_options & nir_lower_minmax64) != 0'),
1118 (('ige', ('imax(is_used_once)', 'a@64', 'b@64'), 0), ('ige', ('imax', ('unpack_64_2x32_split_y', a
), ('unpack_64_2x32_split_y', b
)), 0), '(options->lower_int64_options & nir_lower_minmax64) != 0'),
1119 (('ige', ('imin(is_used_once)', 'a@64', 'b@64'), 0), ('ige', ('imin', ('unpack_64_2x32_split_y', a
), ('unpack_64_2x32_split_y', b
)), 0), '(options->lower_int64_options & nir_lower_minmax64) != 0'),
1120 (('ilt', 'a@64', 0), ('ilt', ('unpack_64_2x32_split_y', a
), 0), '(options->lower_int64_options & nir_lower_icmp64) != 0'),
1121 (('ige', 'a@64', 0), ('ige', ('unpack_64_2x32_split_y', a
), 0), '(options->lower_int64_options & nir_lower_icmp64) != 0'),
1123 (('ine', 'a@64', 0), ('ine', ('ior', ('unpack_64_2x32_split_x', a
), ('unpack_64_2x32_split_y', a
)), 0), '(options->lower_int64_options & nir_lower_icmp64) != 0'),
1124 (('ieq', 'a@64', 0), ('ieq', ('ior', ('unpack_64_2x32_split_x', a
), ('unpack_64_2x32_split_y', a
)), 0), '(options->lower_int64_options & nir_lower_icmp64) != 0'),
1125 # 0u < uint(a) <=> uint(a) != 0u
1126 (('ult', 0, 'a@64'), ('ine', ('ior', ('unpack_64_2x32_split_x', a
), ('unpack_64_2x32_split_y', a
)), 0), '(options->lower_int64_options & nir_lower_icmp64) != 0'),
1128 # Alternative lowering that doesn't rely on bfi.
1129 (('bitfield_insert', 'base', 'insert', 'offset', 'bits'),
1130 ('bcsel', ('ult', 31, 'bits'),
1133 ('iand', 'base', ('inot', ('ishl', ('isub', ('ishl', 1, 'bits'), 1), 'offset'))),
1134 ('iand', ('ishl', 'insert', 'offset'), ('ishl', ('isub', ('ishl', 1, 'bits'), 1), 'offset'))))),
1135 'options->lower_bitfield_insert_to_shifts'),
1137 # Alternative lowering that uses bitfield_select.
1138 (('bitfield_insert', 'base', 'insert', 'offset', 'bits'),
1139 ('bcsel', ('ult', 31, 'bits'), 'insert',
1140 ('bitfield_select', ('bfm', 'bits', 'offset'), ('ishl', 'insert', 'offset'), 'base')),
1141 'options->lower_bitfield_insert_to_bitfield_select'),
1143 (('ibitfield_extract', 'value', 'offset', 'bits'),
1144 ('bcsel', ('ult', 31, 'bits'), 'value',
1145 ('ibfe', 'value', 'offset', 'bits')),
1146 'options->lower_bitfield_extract'),
1148 (('ubitfield_extract', 'value', 'offset', 'bits'),
1149 ('bcsel', ('ult', 31, 'bits'), 'value',
1150 ('ubfe', 'value', 'offset', 'bits')),
1151 'options->lower_bitfield_extract'),
1153 # Note that these opcodes are defined to only use the five least significant bits of 'offset' and 'bits'
1154 (('ubfe', 'value', 'offset', ('iand', 31, 'bits')), ('ubfe', 'value', 'offset', 'bits')),
1155 (('ubfe', 'value', ('iand', 31, 'offset'), 'bits'), ('ubfe', 'value', 'offset', 'bits')),
1156 (('ibfe', 'value', 'offset', ('iand', 31, 'bits')), ('ibfe', 'value', 'offset', 'bits')),
1157 (('ibfe', 'value', ('iand', 31, 'offset'), 'bits'), ('ibfe', 'value', 'offset', 'bits')),
1158 (('bfm', 'bits', ('iand', 31, 'offset')), ('bfm', 'bits', 'offset')),
1159 (('bfm', ('iand', 31, 'bits'), 'offset'), ('bfm', 'bits', 'offset')),
1161 (('ibitfield_extract', 'value', 'offset', 'bits'),
1162 ('bcsel', ('ieq', 0, 'bits'),
1165 ('ishl', 'value', ('isub', ('isub', 32, 'bits'), 'offset')),
1166 ('isub', 32, 'bits'))),
1167 'options->lower_bitfield_extract_to_shifts'),
1169 (('ubitfield_extract', 'value', 'offset', 'bits'),
1171 ('ushr', 'value', 'offset'),
1172 ('bcsel', ('ieq', 'bits', 32),
1174 ('isub', ('ishl', 1, 'bits'), 1))),
1175 'options->lower_bitfield_extract_to_shifts'),
1177 (('ifind_msb', 'value'),
1178 ('ufind_msb', ('bcsel', ('ilt', 'value', 0), ('inot', 'value'), 'value')),
1179 'options->lower_ifind_msb'),
1181 (('find_lsb', 'value'),
1182 ('ufind_msb', ('iand', 'value', ('ineg', 'value'))),
1183 'options->lower_find_lsb'),
1185 (('extract_i8', a
, 'b@32'),
1186 ('ishr', ('ishl', a
, ('imul', ('isub', 3, b
), 8)), 24),
1187 'options->lower_extract_byte'),
1189 (('extract_u8', a
, 'b@32'),
1190 ('iand', ('ushr', a
, ('imul', b
, 8)), 0xff),
1191 'options->lower_extract_byte'),
1193 (('extract_i16', a
, 'b@32'),
1194 ('ishr', ('ishl', a
, ('imul', ('isub', 1, b
), 16)), 16),
1195 'options->lower_extract_word'),
1197 (('extract_u16', a
, 'b@32'),
1198 ('iand', ('ushr', a
, ('imul', b
, 16)), 0xffff),
1199 'options->lower_extract_word'),
1201 (('pack_unorm_2x16', 'v'),
1202 ('pack_uvec2_to_uint',
1203 ('f2u32', ('fround_even', ('fmul', ('fsat', 'v'), 65535.0)))),
1204 'options->lower_pack_unorm_2x16'),
1206 (('pack_unorm_4x8', 'v'),
1207 ('pack_uvec4_to_uint',
1208 ('f2u32', ('fround_even', ('fmul', ('fsat', 'v'), 255.0)))),
1209 'options->lower_pack_unorm_4x8'),
1211 (('pack_snorm_2x16', 'v'),
1212 ('pack_uvec2_to_uint',
1213 ('f2i32', ('fround_even', ('fmul', ('fmin', 1.0, ('fmax', -1.0, 'v')), 32767.0)))),
1214 'options->lower_pack_snorm_2x16'),
1216 (('pack_snorm_4x8', 'v'),
1217 ('pack_uvec4_to_uint',
1218 ('f2i32', ('fround_even', ('fmul', ('fmin', 1.0, ('fmax', -1.0, 'v')), 127.0)))),
1219 'options->lower_pack_snorm_4x8'),
1221 (('unpack_unorm_2x16', 'v'),
1222 ('fdiv', ('u2f32', ('vec2', ('extract_u16', 'v', 0),
1223 ('extract_u16', 'v', 1))),
1225 'options->lower_unpack_unorm_2x16'),
1227 (('unpack_unorm_4x8', 'v'),
1228 ('fdiv', ('u2f32', ('vec4', ('extract_u8', 'v', 0),
1229 ('extract_u8', 'v', 1),
1230 ('extract_u8', 'v', 2),
1231 ('extract_u8', 'v', 3))),
1233 'options->lower_unpack_unorm_4x8'),
1235 (('unpack_snorm_2x16', 'v'),
1236 ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec2', ('extract_i16', 'v', 0),
1237 ('extract_i16', 'v', 1))),
1239 'options->lower_unpack_snorm_2x16'),
1241 (('unpack_snorm_4x8', 'v'),
1242 ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec4', ('extract_i8', 'v', 0),
1243 ('extract_i8', 'v', 1),
1244 ('extract_i8', 'v', 2),
1245 ('extract_i8', 'v', 3))),
1247 'options->lower_unpack_snorm_4x8'),
1249 (('pack_half_2x16_split', 'a@32', 'b@32'),
1250 ('ior', ('ishl', ('u2u32', ('f2f16', b
)), 16), ('u2u32', ('f2f16', a
))),
1251 'options->lower_pack_half_2x16_split'),
1253 (('unpack_half_2x16_split_x', 'a@32'),
1254 ('f2f32', ('u2u16', a
)),
1255 'options->lower_unpack_half_2x16_split'),
1257 (('unpack_half_2x16_split_y', 'a@32'),
1258 ('f2f32', ('u2u16', ('ushr', a
, 16))),
1259 'options->lower_unpack_half_2x16_split'),
1261 (('isign', a
), ('imin', ('imax', a
, -1), 1), 'options->lower_isign'),
1262 (('fsign', a
), ('fsub', ('b2f', ('flt', 0.0, a
)), ('b2f', ('flt', a
, 0.0))), 'options->lower_fsign'),
1264 # Address/offset calculations:
1265 # Drivers supporting imul24 should use the nir_lower_amul() pass, this
1266 # rule converts everyone else to imul:
1267 (('amul', a
, b
), ('imul', a
, b
), '!options->has_imul24'),
1269 (('imad24_ir3', a
, b
, 0), ('imul24', a
, b
)),
1270 (('imad24_ir3', a
, 0, c
), (c
)),
1271 (('imad24_ir3', a
, 1, c
), ('iadd', a
, c
)),
1273 # if first two srcs are const, crack apart the imad so constant folding
1274 # can clean up the imul:
1275 # TODO ffma should probably get a similar rule:
1276 (('imad24_ir3', '#a', '#b', c
), ('iadd', ('imul', a
, b
), c
)),
1278 # These will turn 24b address/offset calc back into 32b shifts, but
1279 # it should be safe to get back some of the bits of precision that we
1280 # already decided were no necessary:
1281 (('imul24', a
, '#b@32(is_pos_power_of_two)'), ('ishl', a
, ('find_lsb', b
)), '!options->lower_bitops'),
1282 (('imul24', a
, '#b@32(is_neg_power_of_two)'), ('ineg', ('ishl', a
, ('find_lsb', ('iabs', b
)))), '!options->lower_bitops'),
1283 (('imul24', a
, 0), (0)),
1286 # bit_size dependent lowerings
1287 for bit_size
in [8, 16, 32, 64]:
1288 # convenience constants
1289 intmax
= (1 << (bit_size
- 1)) - 1
1290 intmin
= 1 << (bit_size
- 1)
1293 (('iadd_sat@' + str(bit_size
), a
, b
),
1294 ('bcsel', ('ige', b
, 1), ('bcsel', ('ilt', ('iadd', a
, b
), a
), intmax
, ('iadd', a
, b
)),
1295 ('bcsel', ('ilt', a
, ('iadd', a
, b
)), intmin
, ('iadd', a
, b
))), 'options->lower_add_sat'),
1296 (('isub_sat@' + str(bit_size
), a
, b
),
1297 ('bcsel', ('ilt', b
, 0), ('bcsel', ('ilt', ('isub', a
, b
), a
), intmax
, ('isub', a
, b
)),
1298 ('bcsel', ('ilt', a
, ('isub', a
, b
)), intmin
, ('isub', a
, b
))), 'options->lower_add_sat'),
1301 invert
= OrderedDict([('feq', 'fne'), ('fne', 'feq')])
1303 for left
, right
in itertools
.combinations_with_replacement(invert
.keys(), 2):
1304 optimizations
.append((('inot', ('ior(is_used_once)', (left
, a
, b
), (right
, c
, d
))),
1305 ('iand', (invert
[left
], a
, b
), (invert
[right
], c
, d
))))
1306 optimizations
.append((('inot', ('iand(is_used_once)', (left
, a
, b
), (right
, c
, d
))),
1307 ('ior', (invert
[left
], a
, b
), (invert
[right
], c
, d
))))
1309 # Optimize x2bN(b2x(x)) -> x
1310 for size
in type_sizes('bool'):
1311 aN
= 'a@' + str(size
)
1312 f2bN
= 'f2b' + str(size
)
1313 i2bN
= 'i2b' + str(size
)
1314 optimizations
.append(((f2bN
, ('b2f', aN
)), a
))
1315 optimizations
.append(((i2bN
, ('b2i', aN
)), a
))
1317 # Optimize x2yN(b2x(x)) -> b2y
1318 for x
, y
in itertools
.product(['f', 'u', 'i'], ['f', 'u', 'i']):
1319 if x
!= 'f' and y
!= 'f' and x
!= y
:
1322 b2x
= 'b2f' if x
== 'f' else 'b2i'
1323 b2y
= 'b2f' if y
== 'f' else 'b2i'
1324 x2yN
= '{}2{}'.format(x
, y
)
1325 optimizations
.append(((x2yN
, (b2x
, a
)), (b2y
, a
)))
1327 # Optimize away x2xN(a@N)
1328 for t
in ['int', 'uint', 'float']:
1329 for N
in type_sizes(t
):
1330 x2xN
= '{0}2{0}{1}'.format(t
[0], N
)
1331 aN
= 'a@{0}'.format(N
)
1332 optimizations
.append(((x2xN
, aN
), a
))
1334 # Optimize x2xN(y2yM(a@P)) -> y2yN(a) for integers
1335 # In particular, we can optimize away everything except upcast of downcast and
1336 # upcasts where the type differs from the other cast
1337 for N
, M
in itertools
.product(type_sizes('uint'), type_sizes('uint')):
1339 # The outer cast is a down-cast. It doesn't matter what the size of the
1340 # argument of the inner cast is because we'll never been in the upcast
1341 # of downcast case. Regardless of types, we'll always end up with y2yN
1343 for x
, y
in itertools
.product(['i', 'u'], ['i', 'u']):
1344 x2xN
= '{0}2{0}{1}'.format(x
, N
)
1345 y2yM
= '{0}2{0}{1}'.format(y
, M
)
1346 y2yN
= '{0}2{0}{1}'.format(y
, N
)
1347 optimizations
.append(((x2xN
, (y2yM
, a
)), (y2yN
, a
)))
1349 # If the outer cast is an up-cast, we have to be more careful about the
1350 # size of the argument of the inner cast and with types. In this case,
1351 # the type is always the type of type up-cast which is given by the
1353 for P
in type_sizes('uint'):
1354 # We can't optimize away up-cast of down-cast.
1358 # Because we're doing down-cast of down-cast, the types always have
1359 # to match between the two casts
1360 for x
in ['i', 'u']:
1361 x2xN
= '{0}2{0}{1}'.format(x
, N
)
1362 x2xM
= '{0}2{0}{1}'.format(x
, M
)
1363 aP
= 'a@{0}'.format(P
)
1364 optimizations
.append(((x2xN
, (x2xM
, aP
)), (x2xN
, a
)))
1366 # The N == M case is handled by other optimizations
1369 # Optimize comparisons with up-casts
1370 for t
in ['int', 'uint', 'float']:
1371 for N
, M
in itertools
.product(type_sizes(t
), repeat
=2):
1372 if N
== 1 or N
>= M
:
1375 x2xM
= '{0}2{0}{1}'.format(t
[0], M
)
1376 x2xN
= '{0}2{0}{1}'.format(t
[0], N
)
1379 xeq
= 'feq' if t
== 'float' else 'ieq'
1380 xne
= 'fne' if t
== 'float' else 'ine'
1381 xge
= '{0}ge'.format(t
[0])
1382 xlt
= '{0}lt'.format(t
[0])
1384 # Up-casts are lossless so for correctly signed comparisons of
1385 # up-casted values we can do the comparison at the largest of the two
1386 # original sizes and drop one or both of the casts. (We have
1387 # optimizations to drop the no-op casts which this may generate.)
1388 for P
in type_sizes(t
):
1394 ((xeq
, (x2xM
, aN
), (x2xM
, bP
)), (xeq
, a
, (x2xN
, b
))),
1395 ((xne
, (x2xM
, aN
), (x2xM
, bP
)), (xne
, a
, (x2xN
, b
))),
1396 ((xge
, (x2xM
, aN
), (x2xM
, bP
)), (xge
, a
, (x2xN
, b
))),
1397 ((xlt
, (x2xM
, aN
), (x2xM
, bP
)), (xlt
, a
, (x2xN
, b
))),
1398 ((xge
, (x2xM
, bP
), (x2xM
, aN
)), (xge
, (x2xN
, b
), a
)),
1399 ((xlt
, (x2xM
, bP
), (x2xM
, aN
)), (xlt
, (x2xN
, b
), a
)),
1402 # The next bit doesn't work on floats because the range checks would
1403 # get way too complicated.
1404 if t
in ['int', 'uint']:
1406 xN_min
= -(1 << (N
- 1))
1407 xN_max
= (1 << (N
- 1)) - 1
1410 xN_max
= (1 << N
) - 1
1414 # If we're up-casting and comparing to a constant, we can unfold
1415 # the comparison into a comparison with the shrunk down constant
1416 # and a check that the constant fits in the smaller bit size.
1418 ((xeq
, (x2xM
, aN
), '#b'),
1419 ('iand', (xeq
, a
, (x2xN
, b
)), (xeq
, (x2xM
, (x2xN
, b
)), b
))),
1420 ((xne
, (x2xM
, aN
), '#b'),
1421 ('ior', (xne
, a
, (x2xN
, b
)), (xne
, (x2xM
, (x2xN
, b
)), b
))),
1422 ((xlt
, (x2xM
, aN
), '#b'),
1423 ('iand', (xlt
, xN_min
, b
),
1424 ('ior', (xlt
, xN_max
, b
), (xlt
, a
, (x2xN
, b
))))),
1425 ((xlt
, '#a', (x2xM
, bN
)),
1426 ('iand', (xlt
, a
, xN_max
),
1427 ('ior', (xlt
, a
, xN_min
), (xlt
, (x2xN
, a
), b
)))),
1428 ((xge
, (x2xM
, aN
), '#b'),
1429 ('iand', (xge
, xN_max
, b
),
1430 ('ior', (xge
, xN_min
, b
), (xge
, a
, (x2xN
, b
))))),
1431 ((xge
, '#a', (x2xM
, bN
)),
1432 ('iand', (xge
, a
, xN_min
),
1433 ('ior', (xge
, a
, xN_max
), (xge
, (x2xN
, a
), b
)))),
1436 def fexp2i(exp
, bits
):
1437 # Generate an expression which constructs value 2.0^exp or 0.0.
1439 # We assume that exp is already in a valid range:
1441 # * [-15, 15] for 16-bit float
1442 # * [-127, 127] for 32-bit float
1443 # * [-1023, 1023] for 16-bit float
1445 # If exp is the lowest value in the valid range, a value of 0.0 is
1446 # constructed. Otherwise, the value 2.0^exp is constructed.
1448 return ('i2i16', ('ishl', ('iadd', exp
, 15), 10))
1450 return ('ishl', ('iadd', exp
, 127), 23)
1452 return ('pack_64_2x32_split', 0, ('ishl', ('iadd', exp
, 1023), 20))
1456 def ldexp(f
, exp
, bits
):
1457 # The maximum possible range for a normal exponent is [-126, 127] and,
1458 # throwing in denormals, you get a maximum range of [-149, 127]. This
1459 # means that we can potentially have a swing of +-276. If you start with
1460 # FLT_MAX, you actually have to do ldexp(FLT_MAX, -278) to get it to flush
1461 # all the way to zero. The GLSL spec only requires that we handle a subset
1462 # of this range. From version 4.60 of the spec:
1464 # "If exp is greater than +128 (single-precision) or +1024
1465 # (double-precision), the value returned is undefined. If exp is less
1466 # than -126 (single-precision) or -1022 (double-precision), the value
1467 # returned may be flushed to zero. Additionally, splitting the value
1468 # into a significand and exponent using frexp() and then reconstructing
1469 # a floating-point value using ldexp() should yield the original input
1470 # for zero and all finite non-denormalized values."
1472 # The SPIR-V spec has similar language.
1474 # In order to handle the maximum value +128 using the fexp2i() helper
1475 # above, we have to split the exponent in half and do two multiply
1478 # First, we clamp exp to a reasonable range. Specifically, we clamp to
1479 # twice the full range that is valid for the fexp2i() function above. If
1480 # exp/2 is the bottom value of that range, the fexp2i() expression will
1481 # yield 0.0f which, when multiplied by f, will flush it to zero which is
1482 # allowed by the GLSL and SPIR-V specs for low exponent values. If the
1483 # value is clamped from above, then it must have been above the supported
1484 # range of the GLSL built-in and therefore any return value is acceptable.
1486 exp
= ('imin', ('imax', exp
, -30), 30)
1488 exp
= ('imin', ('imax', exp
, -254), 254)
1490 exp
= ('imin', ('imax', exp
, -2046), 2046)
1494 # Now we compute two powers of 2, one for exp/2 and one for exp-exp/2.
1495 # (We use ishr which isn't the same for -1, but the -1 case still works
1496 # since we use exp-exp/2 as the second exponent.) While the spec
1497 # technically defines ldexp as f * 2.0^exp, simply multiplying once doesn't
1498 # work with denormals and doesn't allow for the full swing in exponents
1499 # that you can get with normalized values. Instead, we create two powers
1500 # of two and multiply by them each in turn. That way the effective range
1501 # of our exponent is doubled.
1502 pow2_1
= fexp2i(('ishr', exp
, 1), bits
)
1503 pow2_2
= fexp2i(('isub', exp
, ('ishr', exp
, 1)), bits
)
1504 return ('fmul', ('fmul', f
, pow2_1
), pow2_2
)
1507 (('ldexp@16', 'x', 'exp'), ldexp('x', 'exp', 16), 'options->lower_ldexp'),
1508 (('ldexp@32', 'x', 'exp'), ldexp('x', 'exp', 32), 'options->lower_ldexp'),
1509 (('ldexp@64', 'x', 'exp'), ldexp('x', 'exp', 64), 'options->lower_ldexp'),
1512 # Unreal Engine 4 demo applications open-codes bitfieldReverse()
1513 def bitfield_reverse(u
):
1514 step1
= ('ior', ('ishl', u
, 16), ('ushr', u
, 16))
1515 step2
= ('ior', ('ishl', ('iand', step1
, 0x00ff00ff), 8), ('ushr', ('iand', step1
, 0xff00ff00), 8))
1516 step3
= ('ior', ('ishl', ('iand', step2
, 0x0f0f0f0f), 4), ('ushr', ('iand', step2
, 0xf0f0f0f0), 4))
1517 step4
= ('ior', ('ishl', ('iand', step3
, 0x33333333), 2), ('ushr', ('iand', step3
, 0xcccccccc), 2))
1518 step5
= ('ior(many-comm-expr)', ('ishl', ('iand', step4
, 0x55555555), 1), ('ushr', ('iand', step4
, 0xaaaaaaaa), 1))
1522 optimizations
+= [(bitfield_reverse('x@32'), ('bitfield_reverse', 'x'), '!options->lower_bitfield_reverse')]
1524 # For any float comparison operation, "cmp", if you have "a == a && a cmp b"
1525 # then the "a == a" is redundant because it's equivalent to "a is not NaN"
1526 # and, if a is a NaN then the second comparison will fail anyway.
1527 for op
in ['flt', 'fge', 'feq']:
1529 (('iand', ('feq', a
, a
), (op
, a
, b
)), ('!' + op
, a
, b
)),
1530 (('iand', ('feq', a
, a
), (op
, b
, a
)), ('!' + op
, b
, a
)),
1533 # Add optimizations to handle the case where the result of a ternary is
1534 # compared to a constant. This way we can take things like
1540 # a ? (0 > 0) : (1 > 0)
1542 # which constant folding will eat for lunch. The resulting ternary will
1543 # further get cleaned up by the boolean reductions above and we will be
1544 # left with just the original variable "a".
1545 for op
in ['flt', 'fge', 'feq', 'fne',
1546 'ilt', 'ige', 'ieq', 'ine', 'ult', 'uge']:
1548 ((op
, ('bcsel', 'a', '#b', '#c'), '#d'),
1549 ('bcsel', 'a', (op
, 'b', 'd'), (op
, 'c', 'd'))),
1550 ((op
, '#d', ('bcsel', a
, '#b', '#c')),
1551 ('bcsel', 'a', (op
, 'd', 'b'), (op
, 'd', 'c'))),
1555 # For example, this converts things like
1557 # 1 + mix(0, a - 1, condition)
1561 # mix(1, (a-1)+1, condition)
1563 # Other optimizations will rearrange the constants.
1564 for op
in ['fadd', 'fmul', 'iadd', 'imul']:
1566 ((op
, ('bcsel(is_used_once)', a
, '#b', c
), '#d'), ('bcsel', a
, (op
, b
, d
), (op
, c
, d
)))
1569 # For derivatives in compute shaders, GLSL_NV_compute_shader_derivatives
1572 # If neither layout qualifier is specified, derivatives in compute shaders
1573 # return zero, which is consistent with the handling of built-in texture
1574 # functions like texture() in GLSL 4.50 compute shaders.
1575 for op
in ['fddx', 'fddx_fine', 'fddx_coarse',
1576 'fddy', 'fddy_fine', 'fddy_coarse']:
1578 ((op
, 'a'), 0.0, 'info->stage == MESA_SHADER_COMPUTE && info->cs.derivative_group == DERIVATIVE_GROUP_NONE')
1581 # Some optimizations for ir3-specific instructions.
1583 # 'al * bl': If either 'al' or 'bl' is zero, return zero.
1584 (('umul_low', '#a(is_lower_half_zero)', 'b'), (0)),
1585 # '(ah * bl) << 16 + c': If either 'ah' or 'bl' is zero, return 'c'.
1586 (('imadsh_mix16', '#a@32(is_lower_half_zero)', 'b@32', 'c@32'), ('c')),
1587 (('imadsh_mix16', 'a@32', '#b@32(is_upper_half_zero)', 'c@32'), ('c')),
1590 # These kinds of sequences can occur after nir_opt_peephole_select.
1592 # NOTE: fadd is not handled here because that gets in the way of ffma
1593 # generation in the i965 driver. Instead, fadd and ffma are handled in
1594 # late_optimizations.
1598 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
, d
), (op
, b
, c
, e
)), (op
, b
, c
, ('bcsel', a
, d
, e
))),
1599 (('bcsel', a
, (op
, b
, c
, d
), (op
+ '(is_used_once)', b
, c
, e
)), (op
, b
, c
, ('bcsel', a
, d
, e
))),
1600 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
, d
), (op
, b
, e
, d
)), (op
, b
, ('bcsel', a
, c
, e
), d
)),
1601 (('bcsel', a
, (op
, b
, c
, d
), (op
+ '(is_used_once)', b
, e
, d
)), (op
, b
, ('bcsel', a
, c
, e
), d
)),
1602 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
, d
), (op
, e
, c
, d
)), (op
, ('bcsel', a
, b
, e
), c
, d
)),
1603 (('bcsel', a
, (op
, b
, c
, d
), (op
+ '(is_used_once)', e
, c
, d
)), (op
, ('bcsel', a
, b
, e
), c
, d
)),
1606 for op
in ['fmul', 'iadd', 'imul', 'iand', 'ior', 'ixor', 'fmin', 'fmax', 'imin', 'imax', 'umin', 'umax']:
1608 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
), (op
, b
, 'd(is_not_const)')), (op
, b
, ('bcsel', a
, c
, d
))),
1609 (('bcsel', a
, (op
+ '(is_used_once)', b
, 'c(is_not_const)'), (op
, b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1610 (('bcsel', a
, (op
, b
, 'c(is_not_const)'), (op
+ '(is_used_once)', b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1611 (('bcsel', a
, (op
, b
, c
), (op
+ '(is_used_once)', b
, 'd(is_not_const)')), (op
, b
, ('bcsel', a
, c
, d
))),
1616 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
), (op
, b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1617 (('bcsel', a
, (op
, b
, c
), (op
+ '(is_used_once)', b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1618 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
), (op
, d
, c
)), (op
, ('bcsel', a
, b
, d
), c
)),
1619 (('bcsel', a
, (op
, b
, c
), (op
+ '(is_used_once)', d
, c
)), (op
, ('bcsel', a
, b
, d
), c
)),
1622 for op
in ['frcp', 'frsq', 'fsqrt', 'fexp2', 'flog2', 'fsign', 'fsin', 'fcos']:
1624 (('bcsel', a
, (op
+ '(is_used_once)', b
), (op
, c
)), (op
, ('bcsel', a
, b
, c
))),
1625 (('bcsel', a
, (op
, b
), (op
+ '(is_used_once)', c
)), (op
, ('bcsel', a
, b
, c
))),
1628 # This section contains "late" optimizations that should be run before
1629 # creating ffmas and calling regular optimizations for the final time.
1630 # Optimizations should go here if they help code generation and conflict
1631 # with the regular optimizations.
1632 before_ffma_optimizations
= [
1633 # Propagate constants down multiplication chains
1634 (('~fmul(is_used_once)', ('fmul(is_used_once)', 'a(is_not_const)', '#b'), 'c(is_not_const)'), ('fmul', ('fmul', a
, c
), b
)),
1635 (('imul(is_used_once)', ('imul(is_used_once)', 'a(is_not_const)', '#b'), 'c(is_not_const)'), ('imul', ('imul', a
, c
), b
)),
1636 (('~fadd(is_used_once)', ('fadd(is_used_once)', 'a(is_not_const)', '#b'), 'c(is_not_const)'), ('fadd', ('fadd', a
, c
), b
)),
1637 (('iadd(is_used_once)', ('iadd(is_used_once)', 'a(is_not_const)', '#b'), 'c(is_not_const)'), ('iadd', ('iadd', a
, c
), b
)),
1639 (('~fadd', ('fmul', a
, b
), ('fmul', a
, c
)), ('fmul', a
, ('fadd', b
, c
))),
1640 (('iadd', ('imul', a
, b
), ('imul', a
, c
)), ('imul', a
, ('iadd', b
, c
))),
1641 (('~fadd', ('fneg', a
), a
), 0.0),
1642 (('iadd', ('ineg', a
), a
), 0),
1643 (('iadd', ('ineg', a
), ('iadd', a
, b
)), b
),
1644 (('iadd', a
, ('iadd', ('ineg', a
), b
)), b
),
1645 (('~fadd', ('fneg', a
), ('fadd', a
, b
)), b
),
1646 (('~fadd', a
, ('fadd', ('fneg', a
), b
)), b
),
1648 (('~flrp@32', ('fadd(is_used_once)', a
, -1.0), ('fadd(is_used_once)', a
, 1.0), d
), ('fadd', ('flrp', -1.0, 1.0, d
), a
)),
1649 (('~flrp@32', ('fadd(is_used_once)', a
, 1.0), ('fadd(is_used_once)', a
, -1.0), d
), ('fadd', ('flrp', 1.0, -1.0, d
), a
)),
1650 (('~flrp@32', ('fadd(is_used_once)', a
, '#b'), ('fadd(is_used_once)', a
, '#c'), d
), ('fadd', ('fmul', d
, ('fadd', c
, ('fneg', b
))), ('fadd', a
, b
))),
1653 # This section contains "late" optimizations that should be run after the
1654 # regular optimizations have finished. Optimizations should go here if
1655 # they help code generation but do not necessarily produce code that is
1656 # more easily optimizable.
1657 late_optimizations
= [
1658 # Most of these optimizations aren't quite safe when you get infinity or
1659 # Nan involved but the first one should be fine.
1660 (('flt', ('fadd', a
, b
), 0.0), ('flt', a
, ('fneg', b
))),
1661 (('flt', ('fneg', ('fadd', a
, b
)), 0.0), ('flt', ('fneg', a
), b
)),
1662 (('~fge', ('fadd', a
, b
), 0.0), ('fge', a
, ('fneg', b
))),
1663 (('~fge', ('fneg', ('fadd', a
, b
)), 0.0), ('fge', ('fneg', a
), b
)),
1664 (('~feq', ('fadd', a
, b
), 0.0), ('feq', a
, ('fneg', b
))),
1665 (('~fne', ('fadd', a
, b
), 0.0), ('fne', a
, ('fneg', b
))),
1667 # nir_lower_to_source_mods will collapse this, but its existence during the
1668 # optimization loop can prevent other optimizations.
1669 (('fneg', ('fneg', a
)), a
),
1671 # Subtractions get lowered during optimization, so we need to recombine them
1672 (('fadd', 'a', ('fneg', 'b')), ('fsub', 'a', 'b'), '!options->lower_sub'),
1673 (('iadd', 'a', ('ineg', 'b')), ('isub', 'a', 'b'), '!options->lower_sub'),
1674 (('fneg', a
), ('fsub', 0.0, a
), 'options->lower_negate'),
1675 (('ineg', a
), ('isub', 0, a
), 'options->lower_negate'),
1677 # These are duplicated from the main optimizations table. The late
1678 # patterns that rearrange expressions like x - .5 < 0 to x < .5 can create
1679 # new patterns like these. The patterns that compare with zero are removed
1680 # because they are unlikely to be created in by anything in
1681 # late_optimizations.
1682 (('flt', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('flt', a
, b
)),
1683 (('flt', '#b(is_gt_0_and_lt_1)', ('fsat(is_used_once)', a
)), ('flt', b
, a
)),
1684 (('fge', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('fge', a
, b
)),
1685 (('fge', '#b(is_gt_0_and_lt_1)', ('fsat(is_used_once)', a
)), ('fge', b
, a
)),
1686 (('feq', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('feq', a
, b
)),
1687 (('fne', ('fsat(is_used_once)', a
), '#b(is_gt_0_and_lt_1)'), ('fne', a
, b
)),
1689 (('fge', ('fsat(is_used_once)', a
), 1.0), ('fge', a
, 1.0)),
1690 (('flt', ('fsat(is_used_once)', a
), 1.0), ('flt', a
, 1.0)),
1692 (('~fge', ('fmin(is_used_once)', ('fadd(is_used_once)', a
, b
), ('fadd', c
, d
)), 0.0), ('iand', ('fge', a
, ('fneg', b
)), ('fge', c
, ('fneg', d
)))),
1694 (('flt', ('fneg', a
), ('fneg', b
)), ('flt', b
, a
)),
1695 (('fge', ('fneg', a
), ('fneg', b
)), ('fge', b
, a
)),
1696 (('feq', ('fneg', a
), ('fneg', b
)), ('feq', b
, a
)),
1697 (('fne', ('fneg', a
), ('fneg', b
)), ('fne', b
, a
)),
1698 (('flt', ('fneg', a
), -1.0), ('flt', 1.0, a
)),
1699 (('flt', -1.0, ('fneg', a
)), ('flt', a
, 1.0)),
1700 (('fge', ('fneg', a
), -1.0), ('fge', 1.0, a
)),
1701 (('fge', -1.0, ('fneg', a
)), ('fge', a
, 1.0)),
1702 (('fne', ('fneg', a
), -1.0), ('fne', 1.0, a
)),
1703 (('feq', -1.0, ('fneg', a
)), ('feq', a
, 1.0)),
1706 (('iand', a
, a
), a
),
1708 (('~fadd', ('fneg(is_used_once)', ('fsat(is_used_once)', 'a(is_not_fmul)')), 1.0), ('fsat', ('fadd', 1.0, ('fneg', a
)))),
1710 (('fdot2', a
, b
), ('fdot_replicated2', a
, b
), 'options->fdot_replicates'),
1711 (('fdot3', a
, b
), ('fdot_replicated3', a
, b
), 'options->fdot_replicates'),
1712 (('fdot4', a
, b
), ('fdot_replicated4', a
, b
), 'options->fdot_replicates'),
1713 (('fdph', a
, b
), ('fdph_replicated', a
, b
), 'options->fdot_replicates'),
1715 (('~flrp@32', ('fadd(is_used_once)', a
, b
), ('fadd(is_used_once)', a
, c
), d
), ('fadd', ('flrp', b
, c
, d
), a
)),
1716 (('~flrp@64', ('fadd(is_used_once)', a
, b
), ('fadd(is_used_once)', a
, c
), d
), ('fadd', ('flrp', b
, c
, d
), a
)),
1718 (('~fadd@32', 1.0, ('fmul(is_used_once)', c
, ('fadd', b
, -1.0 ))), ('fadd', ('fadd', 1.0, ('fneg', c
)), ('fmul', b
, c
)), 'options->lower_flrp32'),
1719 (('~fadd@64', 1.0, ('fmul(is_used_once)', c
, ('fadd', b
, -1.0 ))), ('fadd', ('fadd', 1.0, ('fneg', c
)), ('fmul', b
, c
)), 'options->lower_flrp64'),
1721 # A similar operation could apply to any ffma(#a, b, #(-a/2)), but this
1722 # particular operation is common for expanding values stored in a texture
1723 # from [0,1] to [-1,1].
1724 (('~ffma@32', a
, 2.0, -1.0), ('flrp', -1.0, 1.0, a
), '!options->lower_flrp32'),
1725 (('~ffma@32', a
, -2.0, -1.0), ('flrp', -1.0, 1.0, ('fneg', a
)), '!options->lower_flrp32'),
1726 (('~ffma@32', a
, -2.0, 1.0), ('flrp', 1.0, -1.0, a
), '!options->lower_flrp32'),
1727 (('~ffma@32', a
, 2.0, 1.0), ('flrp', 1.0, -1.0, ('fneg', a
)), '!options->lower_flrp32'),
1728 (('~fadd@32', ('fmul(is_used_once)', 2.0, a
), -1.0), ('flrp', -1.0, 1.0, a
), '!options->lower_flrp32'),
1729 (('~fadd@32', ('fmul(is_used_once)', -2.0, a
), -1.0), ('flrp', -1.0, 1.0, ('fneg', a
)), '!options->lower_flrp32'),
1730 (('~fadd@32', ('fmul(is_used_once)', -2.0, a
), 1.0), ('flrp', 1.0, -1.0, a
), '!options->lower_flrp32'),
1731 (('~fadd@32', ('fmul(is_used_once)', 2.0, a
), 1.0), ('flrp', 1.0, -1.0, ('fneg', a
)), '!options->lower_flrp32'),
1735 # a + -a*a + a*b (1)
1737 # Option 1: ffma(a, (b-a), a)
1739 # Alternately, after (1):
1745 # Option 2: ffma(a, 2, -(a*a))
1746 # Option 3: ffma(a, 2, (-a)*a)
1747 # Option 4: ffma(a, -a, (2*a)
1748 # Option 5: a * (2 - a)
1750 # There are a lot of other possible combinations.
1751 (('~ffma@32', ('fadd', b
, ('fneg', a
)), a
, a
), ('flrp', a
, b
, a
), '!options->lower_flrp32'),
1752 (('~ffma@32', a
, 2.0, ('fneg', ('fmul', a
, a
))), ('flrp', a
, 1.0, a
), '!options->lower_flrp32'),
1753 (('~ffma@32', a
, 2.0, ('fmul', ('fneg', a
), a
)), ('flrp', a
, 1.0, a
), '!options->lower_flrp32'),
1754 (('~ffma@32', a
, ('fneg', a
), ('fmul', 2.0, a
)), ('flrp', a
, 1.0, a
), '!options->lower_flrp32'),
1755 (('~fmul@32', a
, ('fadd', 2.0, ('fneg', a
))), ('flrp', a
, 1.0, a
), '!options->lower_flrp32'),
1757 # we do these late so that we don't get in the way of creating ffmas
1758 (('fmin', ('fadd(is_used_once)', '#c', a
), ('fadd(is_used_once)', '#c', b
)), ('fadd', c
, ('fmin', a
, b
))),
1759 (('fmax', ('fadd(is_used_once)', '#c', a
), ('fadd(is_used_once)', '#c', b
)), ('fadd', c
, ('fmax', a
, b
))),
1761 (('bcsel', a
, 0, ('b2f32', ('inot', 'b@bool'))), ('b2f32', ('inot', ('ior', a
, b
)))),
1763 # Putting this in 'optimizations' interferes with the bcsel(a, op(b, c),
1764 # op(b, d)) => op(b, bcsel(a, c, d)) transformations. I do not know why.
1765 (('bcsel', ('feq', ('fsqrt', 'a(is_not_negative)'), 0.0), intBitsToFloat(0x7f7fffff), ('frsq', a
)),
1766 ('fmin', ('frsq', a
), intBitsToFloat(0x7f7fffff))),
1768 # Things that look like DPH in the source shader may get expanded to
1769 # something that looks like dot(v1.xyz, v2.xyz) + v1.w by the time it gets
1770 # to NIR. After FFMA is generated, this can look like:
1772 # fadd(ffma(v1.z, v2.z, ffma(v1.y, v2.y, fmul(v1.x, v2.x))), v1.w)
1774 # Reassociate the last addition into the first multiplication.
1776 # Some shaders do not use 'invariant' in vertex and (possibly) geometry
1777 # shader stages on some outputs that are intended to be invariant. For
1778 # various reasons, this optimization may not be fully applied in all
1779 # shaders used for different rendering passes of the same geometry. This
1780 # can result in Z-fighting artifacts (at best). For now, disable this
1781 # optimization in these stages. See bugzilla #111490. In tessellation
1782 # stages applications seem to use 'precise' when necessary, so allow the
1783 # optimization in those stages.
1784 (('~fadd', ('ffma(is_used_once)', a
, b
, ('ffma', c
, d
, ('fmul', 'e(is_not_const_and_not_fsign)', 'f(is_not_const_and_not_fsign)'))), 'g(is_not_const)'),
1785 ('ffma', a
, b
, ('ffma', c
, d
, ('ffma', e
, 'f', 'g'))), '(info->stage != MESA_SHADER_VERTEX && info->stage != MESA_SHADER_GEOMETRY) && !options->intel_vec4'),
1786 (('~fadd', ('ffma(is_used_once)', a
, b
, ('fmul', 'c(is_not_const_and_not_fsign)', 'd(is_not_const_and_not_fsign)') ), 'e(is_not_const)'),
1787 ('ffma', a
, b
, ('ffma', c
, d
, e
)), '(info->stage != MESA_SHADER_VERTEX && info->stage != MESA_SHADER_GEOMETRY) && !options->intel_vec4'),
1789 # Convert f2fmp instructions to concrete f2f16 instructions. At this point
1790 # any conversions that could have been removed will have been removed in
1791 # nir_opt_algebraic so any remaining ones are required.
1792 (('f2fmp', a
), ('f2f16', a
)),
1796 late_optimizations
+= [
1797 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
), (op
, b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1798 (('bcsel', a
, (op
, b
, c
), (op
+ '(is_used_once)', b
, d
)), (op
, b
, ('bcsel', a
, c
, d
))),
1802 late_optimizations
+= [
1803 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
, d
), (op
, b
, c
, e
)), (op
, b
, c
, ('bcsel', a
, d
, e
))),
1804 (('bcsel', a
, (op
, b
, c
, d
), (op
+ '(is_used_once)', b
, c
, e
)), (op
, b
, c
, ('bcsel', a
, d
, e
))),
1806 (('bcsel', a
, (op
+ '(is_used_once)', b
, c
, d
), (op
, b
, e
, d
)), (op
, b
, ('bcsel', a
, c
, e
), d
)),
1807 (('bcsel', a
, (op
, b
, c
, d
), (op
+ '(is_used_once)', b
, e
, d
)), (op
, b
, ('bcsel', a
, c
, e
), d
)),
1810 print(nir_algebraic
.AlgebraicPass("nir_opt_algebraic", optimizations
).render())
1811 print(nir_algebraic
.AlgebraicPass("nir_opt_algebraic_before_ffma",
1812 before_ffma_optimizations
).render())
1813 print(nir_algebraic
.AlgebraicPass("nir_opt_algebraic_late",
1814 late_optimizations
).render())
projects / mesa.git / blob