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1 | ;; Code and mode itertator and attribute definitions for the ARM backend |
2 | ;; Copyright (C) 2010 Free Software Foundation, Inc. | |
3 | ;; Contributed by ARM Ltd. | |
4 | ;; | |
5 | ;; This file is part of GCC. | |
6 | ;; | |
7 | ;; GCC is free software; you can redistribute it and/or modify it | |
8 | ;; under the terms of the GNU General Public License as published | |
9 | ;; by the Free Software Foundation; either version 3, or (at your | |
10 | ;; option) any later version. | |
11 | ||
12 | ;; GCC is distributed in the hope that it will be useful, but WITHOUT | |
13 | ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | ;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | ;; License for more details. | |
16 | ||
17 | ;; You should have received a copy of the GNU General Public License | |
18 | ;; along with GCC; see the file COPYING3. If not see | |
19 | ;; <http://www.gnu.org/licenses/>. | |
20 | ||
21 | ||
22 | ;;---------------------------------------------------------------------------- | |
23 | ;; Mode iterators | |
24 | ;;---------------------------------------------------------------------------- | |
25 | ||
26 | ;; A list of modes that are exactly 64 bits in size. This is used to expand | |
27 | ;; some splits that are the same for all modes when operating on ARM | |
28 | ;; registers. | |
29 | (define_mode_iterator ANY64 [DI DF V8QI V4HI V2SI V2SF]) | |
30 | ||
0f38f229 TB |
31 | (define_mode_iterator ANY128 [V2DI V2DF V16QI V8HI V4SI V4SF]) |
32 | ||
ceddf62c SN |
33 | ;; A list of integer modes that are up to one word long |
34 | (define_mode_iterator QHSI [QI HI SI]) | |
35 | ||
36 | ;; Integer element sizes implemented by IWMMXT. | |
37 | (define_mode_iterator VMMX [V2SI V4HI V8QI]) | |
38 | ||
39 | ;; Integer element sizes for shifts. | |
40 | (define_mode_iterator VSHFT [V4HI V2SI DI]) | |
41 | ||
42 | ;; Integer and float modes supported by Neon and IWMMXT. | |
43 | (define_mode_iterator VALL [V2DI V2SI V4HI V8QI V2SF V4SI V8HI V16QI V4SF]) | |
44 | ||
45 | ;; Integer and float modes supported by Neon and IWMMXT, except V2DI. | |
46 | (define_mode_iterator VALLW [V2SI V4HI V8QI V2SF V4SI V8HI V16QI V4SF]) | |
47 | ||
48 | ;; Integer modes supported by Neon and IWMMXT | |
49 | (define_mode_iterator VINT [V2DI V2SI V4HI V8QI V4SI V8HI V16QI]) | |
50 | ||
51 | ;; Integer modes supported by Neon and IWMMXT, except V2DI | |
52 | (define_mode_iterator VINTW [V2SI V4HI V8QI V4SI V8HI V16QI]) | |
53 | ||
54 | ;; Double-width vector modes. | |
55 | (define_mode_iterator VD [V8QI V4HI V2SI V2SF]) | |
56 | ||
57 | ;; Double-width vector modes plus 64-bit elements. | |
58 | (define_mode_iterator VDX [V8QI V4HI V2SI V2SF DI]) | |
59 | ||
60 | ;; Double-width vector modes without floating-point elements. | |
61 | (define_mode_iterator VDI [V8QI V4HI V2SI]) | |
62 | ||
63 | ;; Quad-width vector modes. | |
64 | (define_mode_iterator VQ [V16QI V8HI V4SI V4SF]) | |
65 | ||
66 | ;; Quad-width vector modes plus 64-bit elements. | |
67 | (define_mode_iterator VQX [V16QI V8HI V4SI V4SF V2DI]) | |
68 | ||
69 | ;; Quad-width vector modes without floating-point elements. | |
70 | (define_mode_iterator VQI [V16QI V8HI V4SI]) | |
71 | ||
72 | ;; Quad-width vector modes, with TImode added, for moves. | |
73 | (define_mode_iterator VQXMOV [V16QI V8HI V4SI V4SF V2DI TI]) | |
74 | ||
75 | ;; Opaque structure types wider than TImode. | |
76 | (define_mode_iterator VSTRUCT [EI OI CI XI]) | |
77 | ||
78 | ;; Opaque structure types used in table lookups (except vtbl1/vtbx1). | |
79 | (define_mode_iterator VTAB [TI EI OI]) | |
80 | ||
81 | ;; Widenable modes. | |
82 | (define_mode_iterator VW [V8QI V4HI V2SI]) | |
83 | ||
84 | ;; Narrowable modes. | |
85 | (define_mode_iterator VN [V8HI V4SI V2DI]) | |
86 | ||
87 | ;; All supported vector modes (except singleton DImode). | |
88 | (define_mode_iterator VDQ [V8QI V16QI V4HI V8HI V2SI V4SI V2SF V4SF V2DI]) | |
89 | ||
90 | ;; All supported vector modes (except those with 64-bit integer elements). | |
91 | (define_mode_iterator VDQW [V8QI V16QI V4HI V8HI V2SI V4SI V2SF V4SF]) | |
92 | ||
93 | ;; Supported integer vector modes (not 64 bit elements). | |
94 | (define_mode_iterator VDQIW [V8QI V16QI V4HI V8HI V2SI V4SI]) | |
95 | ||
96 | ;; Supported integer vector modes (not singleton DI) | |
97 | (define_mode_iterator VDQI [V8QI V16QI V4HI V8HI V2SI V4SI V2DI]) | |
98 | ||
99 | ;; Vector modes, including 64-bit integer elements. | |
100 | (define_mode_iterator VDQX [V8QI V16QI V4HI V8HI V2SI V4SI V2SF V4SF DI V2DI]) | |
101 | ||
102 | ;; Vector modes including 64-bit integer elements, but no floats. | |
103 | (define_mode_iterator VDQIX [V8QI V16QI V4HI V8HI V2SI V4SI DI V2DI]) | |
104 | ||
105 | ;; Vector modes for float->int conversions. | |
106 | (define_mode_iterator VCVTF [V2SF V4SF]) | |
107 | ||
108 | ;; Vector modes form int->float conversions. | |
109 | (define_mode_iterator VCVTI [V2SI V4SI]) | |
110 | ||
111 | ;; Vector modes for doubleword multiply-accumulate, etc. insns. | |
112 | (define_mode_iterator VMD [V4HI V2SI V2SF]) | |
113 | ||
114 | ;; Vector modes for quadword multiply-accumulate, etc. insns. | |
115 | (define_mode_iterator VMQ [V8HI V4SI V4SF]) | |
116 | ||
117 | ;; Above modes combined. | |
118 | (define_mode_iterator VMDQ [V4HI V2SI V2SF V8HI V4SI V4SF]) | |
119 | ||
120 | ;; As VMD, but integer modes only. | |
121 | (define_mode_iterator VMDI [V4HI V2SI]) | |
122 | ||
123 | ;; As VMQ, but integer modes only. | |
124 | (define_mode_iterator VMQI [V8HI V4SI]) | |
125 | ||
126 | ;; Above modes combined. | |
127 | (define_mode_iterator VMDQI [V4HI V2SI V8HI V4SI]) | |
128 | ||
129 | ;; Modes with 8-bit and 16-bit elements. | |
130 | (define_mode_iterator VX [V8QI V4HI V16QI V8HI]) | |
131 | ||
132 | ;; Modes with 8-bit elements. | |
133 | (define_mode_iterator VE [V8QI V16QI]) | |
134 | ||
135 | ;; Modes with 64-bit elements only. | |
136 | (define_mode_iterator V64 [DI V2DI]) | |
137 | ||
138 | ;; Modes with 32-bit elements only. | |
139 | (define_mode_iterator V32 [V2SI V2SF V4SI V4SF]) | |
140 | ||
46b57af1 TB |
141 | ;; Modes with 8-bit, 16-bit and 32-bit elements. |
142 | (define_mode_iterator VU [V16QI V8HI V4SI]) | |
655b30bf JB |
143 | |
144 | ;; Iterators used for fixed-point support. | |
145 | (define_mode_iterator FIXED [QQ HQ SQ UQQ UHQ USQ HA SA UHA USA]) | |
146 | ||
147 | (define_mode_iterator ADDSUB [V4QQ V2HQ V2HA]) | |
148 | ||
149 | (define_mode_iterator UQADDSUB [V4UQQ V2UHQ UQQ UHQ V2UHA UHA]) | |
150 | ||
151 | (define_mode_iterator QADDSUB [V4QQ V2HQ QQ HQ V2HA HA SQ SA]) | |
152 | ||
153 | (define_mode_iterator QMUL [HQ HA]) | |
154 | ||
ceddf62c SN |
155 | ;;---------------------------------------------------------------------------- |
156 | ;; Code iterators | |
157 | ;;---------------------------------------------------------------------------- | |
158 | ||
159 | ;; A list of condition codes used in compare instructions where | |
160 | ;; the carry flag from the addition is used instead of doing the | |
161 | ;; compare a second time. | |
162 | (define_code_iterator LTUGEU [ltu geu]) | |
163 | ||
164 | ;; A list of ... | |
165 | (define_code_iterator ior_xor [ior xor]) | |
166 | ||
167 | ;; Operations on two halves of a quadword vector. | |
168 | (define_code_iterator vqh_ops [plus smin smax umin umax]) | |
169 | ||
170 | ;; Operations on two halves of a quadword vector, | |
171 | ;; without unsigned variants (for use with *SFmode pattern). | |
172 | (define_code_iterator vqhs_ops [plus smin smax]) | |
173 | ||
46b57af1 TB |
174 | ;; A list of widening operators |
175 | (define_code_iterator SE [sign_extend zero_extend]) | |
ceddf62c SN |
176 | |
177 | ;;---------------------------------------------------------------------------- | |
178 | ;; Mode attributes | |
179 | ;;---------------------------------------------------------------------------- | |
180 | ||
181 | ;; Determine element size suffix from vector mode. | |
182 | (define_mode_attr MMX_char [(V8QI "b") (V4HI "h") (V2SI "w") (DI "d")]) | |
183 | ||
184 | ;; vtbl<n> suffix for NEON vector modes. | |
185 | (define_mode_attr VTAB_n [(TI "2") (EI "3") (OI "4")]) | |
186 | ||
187 | ;; (Opposite) mode to convert to/from for NEON mode conversions. | |
188 | (define_mode_attr V_CVTTO [(V2SI "V2SF") (V2SF "V2SI") | |
189 | (V4SI "V4SF") (V4SF "V4SI")]) | |
190 | ||
191 | ;; Define element mode for each vector mode. | |
192 | (define_mode_attr V_elem [(V8QI "QI") (V16QI "QI") | |
193 | (V4HI "HI") (V8HI "HI") | |
194 | (V2SI "SI") (V4SI "SI") | |
195 | (V2SF "SF") (V4SF "SF") | |
196 | (DI "DI") (V2DI "DI")]) | |
197 | ||
198 | ;; Element modes for vector extraction, padded up to register size. | |
199 | ||
200 | (define_mode_attr V_ext [(V8QI "SI") (V16QI "SI") | |
201 | (V4HI "SI") (V8HI "SI") | |
202 | (V2SI "SI") (V4SI "SI") | |
203 | (V2SF "SF") (V4SF "SF") | |
204 | (DI "DI") (V2DI "DI")]) | |
205 | ||
206 | ;; Mode of pair of elements for each vector mode, to define transfer | |
207 | ;; size for structure lane/dup loads and stores. | |
6308e208 RS |
208 | (define_mode_attr V_two_elem [(V8QI "HI") (V16QI "HI") |
209 | (V4HI "SI") (V8HI "SI") | |
ceddf62c SN |
210 | (V2SI "V2SI") (V4SI "V2SI") |
211 | (V2SF "V2SF") (V4SF "V2SF") | |
212 | (DI "V2DI") (V2DI "V2DI")]) | |
213 | ||
214 | ;; Similar, for three elements. | |
6308e208 RS |
215 | (define_mode_attr V_three_elem [(V8QI "BLK") (V16QI "BLK") |
216 | (V4HI "BLK") (V8HI "BLK") | |
217 | (V2SI "BLK") (V4SI "BLK") | |
218 | (V2SF "BLK") (V4SF "BLK") | |
219 | (DI "EI") (V2DI "EI")]) | |
ceddf62c SN |
220 | |
221 | ;; Similar, for four elements. | |
222 | (define_mode_attr V_four_elem [(V8QI "SI") (V16QI "SI") | |
6308e208 | 223 | (V4HI "V4HI") (V8HI "V4HI") |
ceddf62c SN |
224 | (V2SI "V4SI") (V4SI "V4SI") |
225 | (V2SF "V4SF") (V4SF "V4SF") | |
226 | (DI "OI") (V2DI "OI")]) | |
227 | ||
228 | ;; Register width from element mode | |
229 | (define_mode_attr V_reg [(V8QI "P") (V16QI "q") | |
230 | (V4HI "P") (V8HI "q") | |
231 | (V2SI "P") (V4SI "q") | |
232 | (V2SF "P") (V4SF "q") | |
233 | (DI "P") (V2DI "q")]) | |
234 | ||
235 | ;; Wider modes with the same number of elements. | |
236 | (define_mode_attr V_widen [(V8QI "V8HI") (V4HI "V4SI") (V2SI "V2DI")]) | |
237 | ||
238 | ;; Narrower modes with the same number of elements. | |
239 | (define_mode_attr V_narrow [(V8HI "V8QI") (V4SI "V4HI") (V2DI "V2SI")]) | |
240 | ||
0f38f229 TB |
241 | ;; Narrower modes with double the number of elements. |
242 | (define_mode_attr V_narrow_pack [(V4SI "V8HI") (V8HI "V16QI") (V2DI "V4SI") | |
243 | (V4HI "V8QI") (V2SI "V4HI") (DI "V2SI")]) | |
244 | ||
ceddf62c SN |
245 | ;; Modes with half the number of equal-sized elements. |
246 | (define_mode_attr V_HALF [(V16QI "V8QI") (V8HI "V4HI") | |
0f38f229 | 247 | (V4SI "V2SI") (V4SF "V2SF") (V2DF "DF") |
ceddf62c SN |
248 | (V2DI "DI")]) |
249 | ||
250 | ;; Same, but lower-case. | |
251 | (define_mode_attr V_half [(V16QI "v8qi") (V8HI "v4hi") | |
252 | (V4SI "v2si") (V4SF "v2sf") | |
253 | (V2DI "di")]) | |
254 | ||
255 | ;; Modes with twice the number of equal-sized elements. | |
256 | (define_mode_attr V_DOUBLE [(V8QI "V16QI") (V4HI "V8HI") | |
0f38f229 | 257 | (V2SI "V4SI") (V2SF "V4SF") (DF "V2DF") |
ceddf62c SN |
258 | (DI "V2DI")]) |
259 | ||
260 | ;; Same, but lower-case. | |
261 | (define_mode_attr V_double [(V8QI "v16qi") (V4HI "v8hi") | |
262 | (V2SI "v4si") (V2SF "v4sf") | |
263 | (DI "v2di")]) | |
264 | ||
265 | ;; Modes with double-width elements. | |
266 | (define_mode_attr V_double_width [(V8QI "V4HI") (V16QI "V8HI") | |
267 | (V4HI "V2SI") (V8HI "V4SI") | |
268 | (V2SI "DI") (V4SI "V2DI")]) | |
269 | ||
270 | ;; Double-sized modes with the same element size. | |
271 | ;; Used for neon_vdup_lane, where the second operand is double-sized | |
272 | ;; even when the first one is quad. | |
273 | (define_mode_attr V_double_vector_mode [(V16QI "V8QI") (V8HI "V4HI") | |
274 | (V4SI "V2SI") (V4SF "V2SF") | |
275 | (V8QI "V8QI") (V4HI "V4HI") | |
276 | (V2SI "V2SI") (V2SF "V2SF")]) | |
277 | ||
278 | ;; Mode of result of comparison operations (and bit-select operand 1). | |
279 | (define_mode_attr V_cmp_result [(V8QI "V8QI") (V16QI "V16QI") | |
280 | (V4HI "V4HI") (V8HI "V8HI") | |
281 | (V2SI "V2SI") (V4SI "V4SI") | |
282 | (V2SF "V2SI") (V4SF "V4SI") | |
283 | (DI "DI") (V2DI "V2DI")]) | |
284 | ||
285 | ;; Get element type from double-width mode, for operations where we | |
286 | ;; don't care about signedness. | |
287 | (define_mode_attr V_if_elem [(V8QI "i8") (V16QI "i8") | |
288 | (V4HI "i16") (V8HI "i16") | |
289 | (V2SI "i32") (V4SI "i32") | |
290 | (DI "i64") (V2DI "i64") | |
291 | (V2SF "f32") (V4SF "f32")]) | |
292 | ||
293 | ;; Same, but for operations which work on signed values. | |
294 | (define_mode_attr V_s_elem [(V8QI "s8") (V16QI "s8") | |
295 | (V4HI "s16") (V8HI "s16") | |
296 | (V2SI "s32") (V4SI "s32") | |
297 | (DI "s64") (V2DI "s64") | |
298 | (V2SF "f32") (V4SF "f32")]) | |
299 | ||
300 | ;; Same, but for operations which work on unsigned values. | |
301 | (define_mode_attr V_u_elem [(V8QI "u8") (V16QI "u8") | |
302 | (V4HI "u16") (V8HI "u16") | |
303 | (V2SI "u32") (V4SI "u32") | |
304 | (DI "u64") (V2DI "u64") | |
305 | (V2SF "f32") (V4SF "f32")]) | |
306 | ||
307 | ;; Element types for extraction of unsigned scalars. | |
308 | (define_mode_attr V_uf_sclr [(V8QI "u8") (V16QI "u8") | |
309 | (V4HI "u16") (V8HI "u16") | |
310 | (V2SI "32") (V4SI "32") | |
311 | (V2SF "32") (V4SF "32")]) | |
312 | ||
313 | (define_mode_attr V_sz_elem [(V8QI "8") (V16QI "8") | |
314 | (V4HI "16") (V8HI "16") | |
315 | (V2SI "32") (V4SI "32") | |
316 | (DI "64") (V2DI "64") | |
317 | (V2SF "32") (V4SF "32")]) | |
318 | ||
319 | ;; Element sizes for duplicating ARM registers to all elements of a vector. | |
320 | (define_mode_attr VD_dup [(V8QI "8") (V4HI "16") (V2SI "32") (V2SF "32")]) | |
321 | ||
322 | ;; Opaque integer types for results of pair-forming intrinsics (vtrn, etc.) | |
323 | (define_mode_attr V_PAIR [(V8QI "TI") (V16QI "OI") | |
324 | (V4HI "TI") (V8HI "OI") | |
325 | (V2SI "TI") (V4SI "OI") | |
326 | (V2SF "TI") (V4SF "OI") | |
327 | (DI "TI") (V2DI "OI")]) | |
328 | ||
329 | ;; Same, but lower-case. | |
330 | (define_mode_attr V_pair [(V8QI "ti") (V16QI "oi") | |
331 | (V4HI "ti") (V8HI "oi") | |
332 | (V2SI "ti") (V4SI "oi") | |
333 | (V2SF "ti") (V4SF "oi") | |
334 | (DI "ti") (V2DI "oi")]) | |
335 | ||
336 | ;; Extra suffix on some 64-bit insn names (to avoid collision with standard | |
337 | ;; names which we don't want to define). | |
338 | (define_mode_attr V_suf64 [(V8QI "") (V16QI "") | |
339 | (V4HI "") (V8HI "") | |
340 | (V2SI "") (V4SI "") | |
341 | (V2SF "") (V4SF "") | |
342 | (DI "_neon") (V2DI "")]) | |
343 | ||
344 | ||
345 | ;; Scalars to be presented to scalar multiplication instructions | |
346 | ;; must satisfy the following constraints. | |
347 | ;; 1. If the mode specifies 16-bit elements, the scalar must be in D0-D7. | |
348 | ;; 2. If the mode specifies 32-bit elements, the scalar must be in D0-D15. | |
349 | ||
350 | ;; This mode attribute is used to obtain the correct register constraints. | |
351 | ||
352 | (define_mode_attr scalar_mul_constraint [(V4HI "x") (V2SI "t") (V2SF "t") | |
353 | (V8HI "x") (V4SI "t") (V4SF "t")]) | |
354 | ||
355 | ;; Predicates used for setting neon_type | |
356 | ||
357 | (define_mode_attr Is_float_mode [(V8QI "false") (V16QI "false") | |
358 | (V4HI "false") (V8HI "false") | |
359 | (V2SI "false") (V4SI "false") | |
360 | (V2SF "true") (V4SF "true") | |
361 | (DI "false") (V2DI "false")]) | |
362 | ||
363 | (define_mode_attr Scalar_mul_8_16 [(V8QI "true") (V16QI "true") | |
364 | (V4HI "true") (V8HI "true") | |
365 | (V2SI "false") (V4SI "false") | |
366 | (V2SF "false") (V4SF "false") | |
367 | (DI "false") (V2DI "false")]) | |
368 | ||
369 | ||
370 | (define_mode_attr Is_d_reg [(V8QI "true") (V16QI "false") | |
371 | (V4HI "true") (V8HI "false") | |
372 | (V2SI "true") (V4SI "false") | |
373 | (V2SF "true") (V4SF "false") | |
374 | (DI "true") (V2DI "false")]) | |
375 | ||
376 | (define_mode_attr V_mode_nunits [(V8QI "8") (V16QI "16") | |
377 | (V4HI "4") (V8HI "8") | |
378 | (V2SI "2") (V4SI "4") | |
379 | (V2SF "2") (V4SF "4") | |
0f38f229 TB |
380 | (DI "1") (V2DI "2") |
381 | (DF "1") (V2DF "2")]) | |
ceddf62c | 382 | |
46b57af1 TB |
383 | ;; Same as V_widen, but lower-case. |
384 | (define_mode_attr V_widen_l [(V8QI "v8hi") (V4HI "v4si") ( V2SI "v2di")]) | |
385 | ||
386 | ;; Widen. Result is half the number of elements, but widened to double-width. | |
387 | (define_mode_attr V_unpack [(V16QI "V8HI") (V8HI "V4SI") (V4SI "V2DI")]) | |
ceddf62c | 388 | |
da0a441d BS |
389 | ;; Conditions to be used in extend<mode>di patterns. |
390 | (define_mode_attr qhs_zextenddi_cond [(SI "") (HI "&& arm_arch6") (QI "")]) | |
391 | (define_mode_attr qhs_sextenddi_cond [(SI "") (HI "&& arm_arch6") | |
392 | (QI "&& arm_arch6")]) | |
8d4f1548 | 393 | (define_mode_attr qhs_zextenddi_op [(SI "s_register_operand") |
c9cdcaa5 BS |
394 | (HI "nonimmediate_operand") |
395 | (QI "nonimmediate_operand")]) | |
8d4f1548 RR |
396 | (define_mode_attr qhs_extenddi_op [(SI "s_register_operand") |
397 | (HI "nonimmediate_operand") | |
398 | (QI "arm_reg_or_extendqisi_mem_op")]) | |
399 | (define_mode_attr qhs_extenddi_cstr [(SI "r") (HI "rm") (QI "rUq")]) | |
400 | (define_mode_attr qhs_zextenddi_cstr [(SI "r") (HI "rm") (QI "rm")]) | |
da0a441d | 401 | |
655b30bf JB |
402 | ;; Mode attributes used for fixed-point support. |
403 | (define_mode_attr qaddsub_suf [(V4UQQ "8") (V2UHQ "16") (UQQ "8") (UHQ "16") | |
404 | (V2UHA "16") (UHA "16") | |
405 | (V4QQ "8") (V2HQ "16") (QQ "8") (HQ "16") | |
406 | (V2HA "16") (HA "16") (SQ "") (SA "")]) | |
407 | ||
ceddf62c SN |
408 | ;;---------------------------------------------------------------------------- |
409 | ;; Code attributes | |
410 | ;;---------------------------------------------------------------------------- | |
411 | ||
412 | ;; Assembler mnemonics for vqh_ops and vqhs_ops iterators. | |
413 | (define_code_attr VQH_mnem [(plus "vadd") (smin "vmin") (smax "vmax") | |
414 | (umin "vmin") (umax "vmax")]) | |
415 | ||
416 | ;; Signs of above, where relevant. | |
417 | (define_code_attr VQH_sign [(plus "i") (smin "s") (smax "s") (umin "u") | |
418 | (umax "u")]) | |
419 | ||
420 | (define_code_attr cnb [(ltu "CC_C") (geu "CC")]) | |
421 | (define_code_attr optab [(ltu "ltu") (geu "geu")]) | |
46b57af1 TB |
422 | |
423 | ;; Assembler mnemonics for signedness of widening operations. | |
424 | (define_code_attr US [(sign_extend "s") (zero_extend "u")]) |