1 /* Definitions for code generation pass of GNU compiler.
2 Copyright (C) 2001 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 #include "insn-codes.h"
26 /* Optabs are tables saying how to generate insn bodies
27 for various machine modes and numbers of operands.
28 Each optab applies to one operation.
29 For example, add_optab applies to addition.
31 The insn_code slot is the enum insn_code that says how to
32 generate an insn for this operation on a particular machine mode.
33 It is CODE_FOR_nothing if there is no such insn on the target machine.
35 The `lib_call' slot is the name of the library function that
36 can be used to perform the operation.
38 A few optabs, such as move_optab and cmp_optab, are used
45 enum insn_code insn_code;
47 } handlers [NUM_MACHINE_MODES];
50 /* Given an enum insn_code, access the function to construct
51 the body of that kind of insn. */
52 #define GEN_FCN(CODE) (*insn_data[(int) (CODE)].genfun)
54 /* Enumeration of valid indexes into optab_table. */
62 /* Signed and fp multiply */
65 /* Signed multiply, return high word */
68 /* Signed multiply with result one machine mode wider than args */
75 /* Signed divide-and-remainder in one */
79 /* Signed remainder */
82 /* Optab for floating divide. */
84 /* Convert float to integer in float fmt */
94 /* Arithmetic shift left */
96 /* Logical shift right */
98 /* Arithmetic shift right */
104 /* Signed and floating-point minimum value */
106 /* Signed and floating-point maximum value */
108 /* Unsigned minimum value */
110 /* Unsigned maximum value */
113 /* Move instruction. */
115 /* Move, preserving high part of register. */
118 /* Unary operations */
127 /* Find first bit set */
136 /* Compare insn; two operands. */
138 /* Used only for libcalls for unsigned comparisons. */
140 /* tst insn; compare one operand against 0 */
146 /* Combined compare & jump/store flags/move operations. */
151 /* Push instruction. */
157 extern optab optab_table[OTI_MAX];
159 #define add_optab (optab_table[OTI_add])
160 #define sub_optab (optab_table[OTI_sub])
161 #define smul_optab (optab_table[OTI_smul])
162 #define addv_optab (optab_table[OTI_addv])
163 #define subv_optab (optab_table[OTI_subv])
164 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
165 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
166 #define smul_widen_optab (optab_table[OTI_smul_widen])
167 #define umul_widen_optab (optab_table[OTI_umul_widen])
168 #define sdiv_optab (optab_table[OTI_sdiv])
169 #define smulv_optab (optab_table[OTI_smulv])
170 #define sdivv_optab (optab_table[OTI_sdivv])
171 #define sdivmod_optab (optab_table[OTI_sdivmod])
172 #define udiv_optab (optab_table[OTI_udiv])
173 #define udivmod_optab (optab_table[OTI_udivmod])
174 #define smod_optab (optab_table[OTI_smod])
175 #define umod_optab (optab_table[OTI_umod])
176 #define flodiv_optab (optab_table[OTI_flodiv])
177 #define ftrunc_optab (optab_table[OTI_ftrunc])
178 #define and_optab (optab_table[OTI_and])
179 #define ior_optab (optab_table[OTI_ior])
180 #define xor_optab (optab_table[OTI_xor])
181 #define ashl_optab (optab_table[OTI_ashl])
182 #define lshr_optab (optab_table[OTI_lshr])
183 #define ashr_optab (optab_table[OTI_ashr])
184 #define rotl_optab (optab_table[OTI_rotl])
185 #define rotr_optab (optab_table[OTI_rotr])
186 #define smin_optab (optab_table[OTI_smin])
187 #define smax_optab (optab_table[OTI_smax])
188 #define umin_optab (optab_table[OTI_umin])
189 #define umax_optab (optab_table[OTI_umax])
191 #define mov_optab (optab_table[OTI_mov])
192 #define movstrict_optab (optab_table[OTI_movstrict])
194 #define neg_optab (optab_table[OTI_neg])
195 #define negv_optab (optab_table[OTI_negv])
196 #define abs_optab (optab_table[OTI_abs])
197 #define absv_optab (optab_table[OTI_absv])
198 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
199 #define ffs_optab (optab_table[OTI_ffs])
200 #define sqrt_optab (optab_table[OTI_sqrt])
201 #define sin_optab (optab_table[OTI_sin])
202 #define cos_optab (optab_table[OTI_cos])
204 #define cmp_optab (optab_table[OTI_cmp])
205 #define ucmp_optab (optab_table[OTI_ucmp])
206 #define tst_optab (optab_table[OTI_tst])
208 #define strlen_optab (optab_table[OTI_strlen])
210 #define cbranch_optab (optab_table[OTI_cbranch])
211 #define cmov_optab (optab_table[OTI_cmov])
212 #define cstore_optab (optab_table[OTI_cstore])
213 #define push_optab (optab_table[OTI_push])
215 /* Tables of patterns for extending one integer mode to another. */
216 extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2];
218 /* Tables of patterns for converting between fixed and floating point. */
219 extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
220 extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
221 extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
223 /* These arrays record the insn_code of insns that may be needed to
224 perform input and output reloads of special objects. They provide a
225 place to pass a scratch register. */
226 extern enum insn_code reload_in_optab[NUM_MACHINE_MODES];
227 extern enum insn_code reload_out_optab[NUM_MACHINE_MODES];
229 /* Contains the optab used for each rtx code. */
230 extern optab code_to_optab[NUM_RTX_CODE + 1];
232 /* Passed to expand_binop and expand_unop to say which options to try to use
233 if the requested operation can't be open-coded on the requisite mode.
234 Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using a library call.
235 Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try using a wider mode.
236 OPTAB_MUST_WIDEN says try widening and don't try anything else. */
248 typedef rtx (*rtxfun) PARAMS ((rtx));
250 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
251 gives the gen_function to make a branch to test that condition. */
253 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
255 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
256 gives the insn code to make a store-condition insn
257 to test that condition. */
259 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
261 #ifdef HAVE_conditional_move
262 /* Indexed by the machine mode, gives the insn code to make a conditional
265 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
268 /* This array records the insn_code of insns to perform block moves. */
269 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
271 /* This array records the insn_code of insns to perform block clears. */
272 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
274 /* Define functions given in optabs.c. */
276 /* Expand a binary operation given optab and rtx operands. */
277 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
278 int, enum optab_methods));
280 /* Expand a binary operation with both signed and unsigned forms. */
281 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
282 rtx, rtx, int, enum optab_methods));
284 /* Generate code to perform an operation on two operands with two results. */
285 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
287 /* Expand a unary arithmetic operation given optab rtx operand. */
288 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
290 /* Expand the absolute value operation. */
291 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
293 /* Expand the complex absolute value operation. */
294 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
296 /* Generate an instruction with a given INSN_CODE with an output and
298 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
300 /* Emit code to perform a series of operations on a multi-word quantity, one
302 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
304 /* Emit one rtl instruction to store zero in specified rtx. */
305 extern void emit_clr_insn PARAMS ((rtx));
307 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */
308 extern void emit_0_to_1_insn PARAMS ((rtx));
310 /* Emit one rtl insn to compare two rtx's. */
311 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
312 enum machine_mode, int, unsigned int));
314 /* The various uses that a comparison can have; used by can_compare_p:
315 jumps, conditional moves, store flag operations. */
316 enum can_compare_purpose
323 /* Nonzero if a compare of mode MODE can be done straightforwardly
324 (without splitting it into pieces). */
325 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
326 enum can_compare_purpose));
328 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
329 enum machine_mode *, int *, int,
330 enum can_compare_purpose));
332 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
333 enum machine_mode, int));
335 /* Return the INSN_CODE to use for an extend operation. */
336 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
337 enum machine_mode, int));
339 /* Generate the body of an insn to extend Y (with mode MFROM)
340 into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
341 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
342 enum machine_mode, int));
344 /* Initialize the tables that control conversion between fixed and
346 extern void init_fixtab PARAMS ((void));
347 extern void init_floattab PARAMS ((void));
349 /* Generate code for a FLOAT_EXPR. */
350 extern void expand_float PARAMS ((rtx, rtx, int));
352 /* Generate code for a FIX_EXPR. */
353 extern void expand_fix PARAMS ((rtx, rtx, int));
355 #endif /* GCC_OPTABS_H */