* config/msp430/msp430.h (ASM_SPEC): Add spaces after inserted
[official-gcc.git] / gcc / config / msp430 / msp430.h
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1 /* GCC backend definitions for the TI MSP430 Processor
2 Copyright (C) 2012-2014 Free Software Foundation, Inc.
3 Contributed by Red Hat.
5 This file is part of GCC.
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.
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.
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/>. */
22 /* Run-time Target Specification */
24 /* True if the MSP430x extensions are enabled. */
25 #ifndef IN_LIBGCC2
26 extern bool msp430x;
27 #endif
29 #define TARGET_CPU_CPP_BUILTINS() \
30 do \
31 { \
32 builtin_define ("NO_TRAMPOLINES"); \
33 builtin_define ("__MSP430__"); \
34 builtin_define (msp430_mcu_name ()); \
35 if (msp430x) \
36 { \
37 builtin_define ("__MSP430X__"); \
38 builtin_assert ("cpu=MSP430X"); \
39 if (TARGET_LARGE) \
40 builtin_define ("__MSP430X_LARGE__"); \
41 } \
42 else \
43 builtin_assert ("cpu=MSP430"); \
44 } \
45 while (0)
47 #undef STARTFILE_SPEC
48 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:%{minrt:crt0-minrt.o%s}%{!minrt:crt0.o%s}} %{!minrt:crtbegin.o%s}"
50 /* -lgcc is included because crtend.o needs __mspabi_func_epilog_1. */
51 #undef ENDFILE_SPEC
52 #define ENDFILE_SPEC "%{!minrt:crtend.o%s} %{minrt:crtn-minrt.o%s}%{!minrt:crtn.o%s} -lgcc"
54 #define ASM_SPEC "-mP " /* Enable polymorphic instructions. */ \
55 "%{mcpu=*:-mcpu=%*}%{!mcpu=*:%{mmcu=*:-mmcu=%*}} " /* Pass the CPU type on to the assembler. */ \
56 "%{mrelax=-mQ} " /* Pass the relax option on to the assembler. */ \
57 "%{mlarge:-ml} " /* Tell the assembler if we are building for the LARGE pointer model. */ \
58 "%{!msim:-md} %{msim:%{mlarge:-md}} " /* Copy data from ROM to RAM if necessary. */ \
59 "%{ffunction-sections:-gdwarf-sections} " /* If function sections are being created then create DWARF line number sections as well. */
61 /* Enable linker section garbage collection by default, unless we
62 are creating a relocatable binary (gc does not work) or debugging
63 is enabled (the GDB testsuite relies upon unused entities not being deleted). */
64 #define LINK_SPEC "%{mrelax:--relax} %{mlarge:%{!r:%{!g:--gc-sections}}}"
66 #undef LIB_SPEC
67 #define LIB_SPEC " \
68 --start-group \
69 -lc \
70 -lgcc \
71 -lcrt \
72 %{msim:-lsim} \
73 %{!msim:-lnosys} \
74 --end-group \
75 %{!T*:%{!msim:%{mmcu=*:--script=%*.ld}}} \
76 %{!T*:%{!msim:%{!mmcu=*:%Tmsp430.ld}}} \
77 %{!T*:%{msim:%{mlarge:%Tmsp430xl-sim.ld}%{!mlarge:%Tmsp430-sim.ld}}} \
80 /* Storage Layout */
82 #define BITS_BIG_ENDIAN 0
83 #define BYTES_BIG_ENDIAN 0
84 #define WORDS_BIG_ENDIAN 0
87 #ifdef IN_LIBGCC2
88 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
89 #define UNITS_PER_WORD 4
90 /* We have a problem with libgcc2. It only defines two versions of
91 each function, one for "int" and one for "long long". Ie it assumes
92 that "sizeof (int) == sizeof (long)". For the MSP430 this is not true
93 and we need a third set of functions. We explicitly define
94 LIBGCC2_UNITS_PER_WORD here so that it is clear that we are expecting
95 to get the SI and DI versions from the libgcc2.c sources, and we
96 provide our own set of HI functions, which is why this
97 definition is surrounded by #ifndef..#endif. */
98 #ifndef LIBGCC2_UNITS_PER_WORD
99 #define LIBGCC2_UNITS_PER_WORD 4
100 #endif
101 #else
102 /* Actual width of a word, in units (bytes). */
103 #define UNITS_PER_WORD 2
104 #endif
106 #define SHORT_TYPE_SIZE 16
107 #define INT_TYPE_SIZE 16
108 #define LONG_TYPE_SIZE 32
109 #define LONG_LONG_TYPE_SIZE 64
111 #define FLOAT_TYPE_SIZE 32
112 #define DOUBLE_TYPE_SIZE 64
113 #define LONG_DOUBLE_TYPE_SIZE 64 /*DOUBLE_TYPE_SIZE*/
115 #define LIBGCC2_HAS_DF_MODE 1
116 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
118 #define DEFAULT_SIGNED_CHAR 0
120 #define STRICT_ALIGNMENT 1
121 #define FUNCTION_BOUNDARY 16
122 #define BIGGEST_ALIGNMENT 16
123 #define STACK_BOUNDARY 16
124 #define PARM_BOUNDARY 8
125 #define PCC_BITFIELD_TYPE_MATTERS 1
127 #define STACK_GROWS_DOWNWARD 1
128 #define FRAME_GROWS_DOWNWARD 1
129 #define FIRST_PARM_OFFSET(FNDECL) 0
131 #define MAX_REGS_PER_ADDRESS 1
133 #define Pmode (TARGET_LARGE ? PSImode : HImode)
134 /* Note: 32 is a lie. Large pointers are actually 20-bits wide. But gcc
135 thinks that any non-power-of-2 pointer size equates to BLKmode, which
136 causes all kinds of problems... */
137 #define POINTER_SIZE (TARGET_LARGE ? 32 : 16)
138 #define POINTERS_EXTEND_UNSIGNED 1
140 #define ADDR_SPACE_NEAR 1
141 #define ADDR_SPACE_FAR 2
143 #define REGISTER_TARGET_PRAGMAS() msp430_register_pragmas()
145 #if 1 /* XXX */
146 /* Define this macro if it is advisable to hold scalars in registers
147 in a wider mode than that declared by the program. In such cases,
148 the value is constrained to be within the bounds of the declared
149 type, but kept valid in the wider mode. The signedness of the
150 extension may differ from that of the type. */
152 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
153 if (GET_MODE_CLASS (MODE) == MODE_INT \
154 && GET_MODE_SIZE (MODE) < 2) \
155 (MODE) = HImode;
156 #endif
158 /* Layout of Source Language Data Types */
160 #undef SIZE_TYPE
161 #define SIZE_TYPE (TARGET_LARGE ? "long unsigned int" : "unsigned int")
162 #undef PTRDIFF_TYPE
163 #define PTRDIFF_TYPE (TARGET_LARGE ? "long int" : "int")
164 #undef WCHAR_TYPE
165 #define WCHAR_TYPE "long int"
166 #undef WCHAR_TYPE_SIZE
167 #define WCHAR_TYPE_SIZE BITS_PER_WORD
168 #define FUNCTION_MODE HImode
169 #define CASE_VECTOR_MODE Pmode
170 #define HAS_LONG_COND_BRANCH 0
171 #define HAS_LONG_UNCOND_BRANCH 0
173 #define LOAD_EXTEND_OP(M) ZERO_EXTEND
174 /*#define WORD_REGISTER_OPERATIONS 1*/
176 #define MOVE_MAX 8
177 #define STARTING_FRAME_OFFSET 0
179 #define INCOMING_RETURN_ADDR_RTX \
180 msp430_incoming_return_addr_rtx ()
182 #define RETURN_ADDR_RTX(COUNT, FA) \
183 msp430_return_addr_rtx (COUNT)
185 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
187 #define SLOW_BYTE_ACCESS 0
190 /* Register Usage */
192 /* gas doesn't recognize PC (R0), SP (R1), and SR (R2) as register
193 names. */
194 #define REGISTER_NAMES \
196 "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", \
197 "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15", \
198 "argptr" \
201 enum reg_class
203 NO_REGS,
204 R12_REGS,
205 R13_REGS,
206 GEN_REGS,
207 ALL_REGS,
208 LIM_REG_CLASSES
211 #define REG_CLASS_NAMES \
213 "NO_REGS", \
214 "R12_REGS", \
215 "R13_REGS", \
216 "GEN_REGS", \
217 "ALL_REGS" \
220 #define REG_CLASS_CONTENTS \
222 0x00000000, \
223 0x00001000, \
224 0x00002000, \
225 0x0000fff2, \
226 0x0001ffff \
229 #define GENERAL_REGS GEN_REGS
230 #define BASE_REG_CLASS GEN_REGS
231 #define INDEX_REG_CLASS GEN_REGS
232 #define N_REG_CLASSES (int) LIM_REG_CLASSES
234 #define PC_REGNUM 0
235 #define STACK_POINTER_REGNUM 1
236 #define CC_REGNUM 2
237 #define FRAME_POINTER_REGNUM 4 /* not usually used, call preserved */
238 #define ARG_POINTER_REGNUM 16
239 #define STATIC_CHAIN_REGNUM 5 /* FIXME */
241 #define FIRST_PSEUDO_REGISTER 17
243 #define REGNO_REG_CLASS(REGNO) ((REGNO) < 17 \
244 ? GEN_REGS : NO_REGS)
246 #define TRAMPOLINE_SIZE 4 /* FIXME */
247 #define TRAMPOLINE_ALIGNMENT 16 /* FIXME */
249 #define ELIMINABLE_REGS \
250 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
251 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
252 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }}
254 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
255 (OFFSET) = msp430_initial_elimination_offset ((FROM), (TO))
258 #define FUNCTION_ARG_REGNO_P(N) ((N) >= 8 && (N) < ARG_POINTER_REGNUM)
259 #define DEFAULT_PCC_STRUCT_RETURN 0
261 /* 1 == register can't be used by gcc, in general
262 0 == register can be used by gcc, in general */
263 #define FIXED_REGISTERS \
265 1,0,1,1, 0,0,0,0, \
266 0,0,0,0, 0,0,0,0, \
267 1, \
270 /* 1 == value changes across function calls
271 0 == value is the same after a call */
272 /* R4 through R10 are callee-saved */
273 #define CALL_USED_REGISTERS \
275 1,0,1,1, 0,0,0,0, \
276 0,0,0,1, 1,1,1,1, \
277 1, \
280 #define REG_ALLOC_ORDER \
281 { 12, 13, 14, 15, 10, 9, 8, 7, 6, 5, 4, 11, 0, 1, 2, 3, 16 }
282 /* { 11, 15, 14, 13, 12, 10, 9, 8, 7, 6, 5, 4, 0, 1, 2, 3, 16 }*/
284 #define REGNO_OK_FOR_BASE_P(regno) 1
285 #define REGNO_OK_FOR_INDEX_P(regno) 1
289 typedef struct
291 /* These two are the current argument status. */
292 char reg_used[4];
293 #define CA_FIRST_REG 12
294 char can_split;
295 /* These two are temporaries used internally. */
296 char start_reg;
297 char reg_count;
298 char mem_count;
299 char special_p;
300 } CUMULATIVE_ARGS;
302 #define INIT_CUMULATIVE_ARGS(CA, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
303 msp430_init_cumulative_args (&CA, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS)
306 /* FIXME */
307 #define NO_PROFILE_COUNTERS 1
308 #define PROFILE_BEFORE_PROLOGUE 1
310 #define FUNCTION_PROFILER(FILE, LABELNO) \
311 fprintf (FILE, "\tcall\t__mcount\n");
313 #define HARD_REGNO_NREGS(REGNO, MODE) \
314 msp430_hard_regno_nregs (REGNO, MODE)
316 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
317 msp430_hard_regno_mode_ok (REGNO, MODE)
319 #define MODES_TIEABLE_P(MODE1, MODE2) \
320 msp430_modes_tieable_p (MODE1, MODE2)
322 /* Exception Handling */
324 /* R12,R13,R14 - EH data
325 R15 - stack adjustment */
327 #define EH_RETURN_DATA_REGNO(N) \
328 (((N) < 3) ? ((N) + 12) : INVALID_REGNUM)
330 #define EH_RETURN_HANDLER_RTX \
331 gen_rtx_MEM(Pmode, gen_rtx_PLUS (Pmode, gen_rtx_REG(Pmode, SP_REGNO), gen_rtx_REG (Pmode, 15)))
333 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 15)
335 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_udata4
338 /* Stack Layout and Calling Conventions */
341 /* Addressing Modes */
345 #define TEXT_SECTION_ASM_OP ".text"
346 #define DATA_SECTION_ASM_OP ".data"
347 #define BSS_SECTION_ASM_OP "\t.section .bss"
349 #define ASM_COMMENT_START " ;"
350 #define ASM_APP_ON ""
351 #define ASM_APP_OFF ""
352 #define LOCAL_LABEL_PREFIX ".L"
353 #undef USER_LABEL_PREFIX
354 #define USER_LABEL_PREFIX ""
356 #define GLOBAL_ASM_OP "\t.global\t"
358 #define ASM_OUTPUT_LABELREF(FILE, SYM) msp430_output_labelref ((FILE), (SYM))
360 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
361 fprintf (FILE, "\t.long .L%d\n", VALUE)
363 /* This is how to output an element of a case-vector that is relative.
364 Note: The local label referenced by the "3b" below is emitted by
365 the tablejump insn. */
367 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
368 fprintf (FILE, "\t.long .L%d - 1b\n", VALUE)
371 #define ASM_OUTPUT_ALIGN(STREAM, LOG) \
372 do \
374 if ((LOG) == 0) \
375 break; \
376 fprintf (STREAM, "\t.balign %d\n", 1 << (LOG)); \
378 while (0)
380 #define JUMP_TABLES_IN_TEXT_SECTION 1
382 #undef DWARF2_ADDR_SIZE
383 #define DWARF2_ADDR_SIZE 4
385 #define INCOMING_FRAME_SP_OFFSET (POINTER_SIZE / BITS_PER_UNIT)
387 #undef PREFERRED_DEBUGGING_TYPE
388 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
390 #define DWARF2_ASM_LINE_DEBUG_INFO 1
392 /* Prevent reload (and others) from choosing HImode stack slots
393 when spilling hard registers when they may contain PSImode values. */
394 #define HARD_REGNO_CALLER_SAVE_MODE(REGNO,NREGS,MODE) \
395 ((TARGET_LARGE && ((NREGS) <= 2)) ? PSImode : choose_hard_reg_mode ((REGNO), (NREGS), false))
397 /* Also stop GCC from thinking that it can eliminate (SUBREG:PSI (SI)). */
398 #define CANNOT_CHANGE_MODE_CLASS(FROM,TO,CLASS) \
399 ( ((TO) == PSImode && (FROM) == SImode) \
400 || ((TO) == SImode && (FROM) == PSImode) \
401 || ((TO) == DImode && (FROM) == PSImode) \
402 || ((TO) == PSImode && (FROM) == DImode) \
405 #define ACCUMULATE_OUTGOING_ARGS 1
407 #undef ASM_DECLARE_FUNCTION_NAME
408 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
409 msp430_start_function ((FILE), (NAME), (DECL))
411 #define TARGET_HAS_NO_HW_DIVIDE (! TARGET_HWMULT)