1 /* Definitions of target machine for GNU compiler, for IBM S/390
2 Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Hartmut Penner (hpenner@de.ibm.com) and
4 Ulrich Weigand (uweigand@de.ibm.com).
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #define TARGET_VERSION fprintf (stderr, " (S/390)");
29 /* Run-time compilation parameters selecting different hardware subsets. */
31 extern int target_flags;
33 /* Target macros checked at runtime of compiler. */
35 #define TARGET_HARD_FLOAT (target_flags & 1)
36 #define TARGET_BACKCHAIN (target_flags & 2)
37 #define TARGET_SMALL_EXEC (target_flags & 4)
38 #define TARGET_DEBUG_ARG (target_flags & 8)
39 #define TARGET_64BIT (target_flags & 16)
40 #define TARGET_MVCLE (target_flags & 32)
42 #define TARGET_DEFAULT 0x3
43 #define TARGET_SOFT_FLOAT (!(target_flags & 1))
45 /* Macro to define tables used to set the flags. This is a list in braces
46 of pairs in braces, each pair being { "NAME", VALUE }
47 where VALUE is the bits to set or minus the bits to clear.
48 An empty string NAME is used to identify the default VALUE. */
50 #define TARGET_SWITCHES \
51 { { "hard-float", 1, N_("Use hardware fp")}, \
52 { "soft-float", -1, N_("Don't use hardware fp")}, \
53 { "backchain", 2, N_("Set backchain")}, \
54 { "no-backchain", -2, N_("Don't set backchain (faster, but debug harder")}, \
55 { "small-exec", 4, N_("Use bras for execucable < 64k")}, \
56 { "no-small-exec",-4, N_("Don't use bras")}, \
57 { "debug", 8, N_("Additional debug prints")}, \
58 { "no-debug", -8, N_("Don't print additional debug prints")}, \
59 { "64", 16, N_("64 bit mode")}, \
60 { "31", -16, N_("31 bit mode")}, \
61 { "mvcle", 32, N_("mvcle use")}, \
62 { "no-mvcle", -32, N_("mvc&ex")}, \
63 { "", TARGET_DEFAULT, 0 } }
65 /* Define this to change the optimizations performed by default. */
66 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) optimization_options(LEVEL, SIZE)
68 /* The current function count for create unique internal labels. */
70 extern int s390_function_count;
72 /* The amount of space used for outgoing arguments. */
74 extern int current_function_outgoing_args_size;
76 /* Target machine storage layout. */
78 /* Define this if most significant bit is lowest numbered in instructions
79 that operate on numbered bit-fields. */
81 #define BITS_BIG_ENDIAN 1
83 /* Define this if most significant byte of a word is the lowest numbered. */
85 #define BYTES_BIG_ENDIAN 1
87 /* Define this if MS word of a multiword is the lowest numbered. */
89 #define WORDS_BIG_ENDIAN 1
91 /* Number of bits in an addressable storage unit. */
93 #define BITS_PER_UNIT 8
95 /* Width in bits of a "word", which is the contents of a machine register. */
97 #define BITS_PER_WORD (TARGET_64BIT ? 64 : 32)
98 #define MAX_BITS_PER_WORD 64
100 /* Width of a word, in units (bytes). */
102 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
103 #define MIN_UNITS_PER_WORD 4
105 /* Width in bits of a pointer. See also the macro `Pmode' defined below. */
107 #define POINTER_SIZE (TARGET_64BIT ? 64 : 32)
109 /* A C expression for the size in bits of the type `short' on the
110 target machine. If you don't define this, the default is half a
111 word. (If this would be less than one storage unit, it is
112 rounded up to one unit.) */
113 #define SHORT_TYPE_SIZE 16
115 /* A C expression for the size in bits of the type `int' on the
116 target machine. If you don't define this, the default is one
118 #define INT_TYPE_SIZE 32
120 /* A C expression for the size in bits of the type `long' on the
121 target machine. If you don't define this, the default is one
123 #define LONG_TYPE_SIZE (TARGET_64BIT ? 64 : 32)
124 #define MAX_LONG_TYPE_SIZE 64
126 /* A C expression for the size in bits of the type `long long' on the
127 target machine. If you don't define this, the default is two
129 #define LONG_LONG_TYPE_SIZE 64
131 /* Right now we only support two floating point formats, the
132 32 and 64 bit ieee formats. */
134 #define FLOAT_TYPE_SIZE 32
135 #define DOUBLE_TYPE_SIZE 64
136 #define LONG_DOUBLE_TYPE_SIZE 64
138 /* Define this macro if it is advisable to hold scalars in registers
139 in a wider mode than that declared by the program. In such cases,
140 the value is constrained to be within the bounds of the declared
141 type, but kept valid in the wider mode. The signedness of the
142 extension may differ from that of the type. */
144 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
145 if (INTEGRAL_MODE_P (MODE) && \
146 GET_MODE_SIZE (MODE) < UNITS_PER_WORD) { \
150 /* Defining PROMOTE_FUNCTION_ARGS eliminates some unnecessary zero/sign
151 extensions applied to char/short functions arguments. Defining
152 PROMOTE_FUNCTION_RETURN does the same for function returns. */
154 #define PROMOTE_FUNCTION_ARGS
155 #define PROMOTE_FUNCTION_RETURN
156 #define PROMOTE_FOR_CALL_ONLY
158 /* Allocation boundary (in *bits*) for storing pointers in memory. */
160 #define POINTER_BOUNDARY 32
162 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
164 #define PARM_BOUNDARY (TARGET_64BIT ? 64 : 32)
166 /* Boundary (in *bits*) on which stack pointer should be aligned. */
168 #define STACK_BOUNDARY 64
170 /* Allocation boundary (in *bits*) for the code of a function. */
172 #define FUNCTION_BOUNDARY 32
174 /* There is no point aligning anything to a rounder boundary than this. */
176 #define BIGGEST_ALIGNMENT 64
178 /* Alignment of field after `int : 0' in a structure. */
180 #define EMPTY_FIELD_BOUNDARY 32
182 /* Alignment on even adresses for LARL instruction. */
184 #define CONSTANT_ALIGNMENT(EXP, ALIGN) (ALIGN) < 16 ? 16 : (ALIGN)
186 #define DATA_ALIGNMENT(TYPE, ALIGN) (ALIGN) < 16 ? 16 : (ALIGN)
188 /* Define this if move instructions will actually fail to work when given
191 #define STRICT_ALIGNMENT 0
193 /* real arithmetic */
195 #define REAL_ARITHMETIC
197 /* Define target floating point format. */
199 #undef TARGET_FLOAT_FORMAT
201 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
203 #define TARGET_FLOAT_FORMAT IBM_FLOAT_FORMAT
206 /* Define if special allocation order desired. */
208 #define REG_ALLOC_ORDER \
209 { 1, 2, 3, 4, 5, 0, 14, 13, 12, 11, 10, 9, 8, 7, 6, \
210 16, 17, 18, 19, 20, 21, 22, 23, \
211 24, 25, 26, 27, 28, 29, 30, 31, \
214 /* Standard register usage. */
216 #define INT_REGNO_P(N) ( (int)(N) >= 0 && (N) < 16 )
218 #define FLOAT_REGNO_P(N) ( (N) >= 16 && (N) < 32 )
220 #define FLOAT_REGNO_P(N) ( (N) >= 16 && (N) < 20 )
222 #define CC_REGNO_P(N) ( (N) == 33 )
224 /* Number of actual hardware registers. The hardware registers are
225 assigned numbers for the compiler from 0 to just below
226 FIRST_PSEUDO_REGISTER.
227 All registers that the compiler knows about must be given numbers,
228 even those that are not normally considered general registers.
229 For the 390, we give the data registers numbers 0-15,
230 and the floating point registers numbers 16-19.
231 G5 and following have 16 IEEE floating point register,
232 which get numbers 16-31. */
234 #define FIRST_PSEUDO_REGISTER 34
236 /* The following register have a fix usage
237 GPR 12: GOT register points to the GOT, setup in prologue,
238 GOT contains pointer to variables in shared libraries
239 GPR 13: Base register setup in prologue to point to the
240 literal table of each function
241 GPR 14: Return registers holds the return address
242 GPR 15: Stack pointer */
244 #define PIC_OFFSET_TABLE_REGNUM 12
245 #define BASE_REGISTER 13
246 #define RETURN_REGNUM 14
247 #define STACK_POINTER_REGNUM 15
249 #define FIXED_REGISTERS \
260 /* 1 for registers not available across function calls. These must include
261 the FIXED_REGISTERS and also any registers that can be used without being
263 The latter must include the registers where values are returned
264 and the register where structure-value addresses are passed. */
266 #define CALL_USED_REGISTERS \
277 /* If not pic code, gpr 12 can be used. */
279 #define CONDITIONAL_REGISTER_USAGE \
284 fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
285 call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
289 /* The following register have a special usage
290 GPR 11: Frame pointer if needed to point to automatic variables.
291 GPR 32: In functions with more the 5 args this register
292 points to that arguments, it is always eliminated
293 with stack- or frame-pointer.
294 GPR 33: Condition code 'register' */
296 #define FRAME_POINTER_REGNUM 11
298 #define ARG_POINTER_REGNUM 32
302 /* We use the register %r0 to pass the static chain to a nested function.
304 Note: It is assumed that this register is call-clobbered!
305 We can't use any of the function-argument registers either,
306 and register 1 is needed by the trampoline code, so we have
307 no other choice but using this one ... */
309 #define STATIC_CHAIN_REGNUM 0
311 /* Return number of consecutive hard regs needed starting at reg REGNO
312 to hold something of mode MODE.
313 This is ordinarily the length in words of a value of mode MODE
314 but can be less for certain modes in special long registers. */
316 #define HARD_REGNO_NREGS(REGNO, MODE) \
317 (FLOAT_REGNO_P(REGNO)? \
318 (GET_MODE_CLASS(MODE) == MODE_COMPLEX_FLOAT ? 2 : 1) : \
319 INT_REGNO_P(REGNO)? \
320 ((GET_MODE_SIZE(MODE)+UNITS_PER_WORD-1) / UNITS_PER_WORD) : \
323 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
324 The gprs can hold QI, HI, SI, SF, DF, SC and DC.
325 Even gprs can hold DI.
326 The floating point registers can hold DF, SF, DC and SC. */
328 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
329 (FLOAT_REGNO_P(REGNO)? \
330 (GET_MODE_CLASS(MODE) == MODE_FLOAT || \
331 GET_MODE_CLASS(MODE) == MODE_COMPLEX_FLOAT) : \
332 INT_REGNO_P(REGNO)? \
333 (HARD_REGNO_NREGS(REGNO, MODE) == 1 || !((REGNO) & 1)) : \
335 GET_MODE_CLASS (MODE) == MODE_CC : \
338 /* Value is 1 if it is a good idea to tie two pseudo registers when one has
339 mode MODE1 and one has mode MODE2.
340 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
341 for any hard reg, then this must be 0 for correct output. */
343 #define MODES_TIEABLE_P(MODE1, MODE2) \
344 (((MODE1) == SFmode || (MODE1) == DFmode) \
345 == ((MODE2) == SFmode || (MODE2) == DFmode))
348 /* Define this macro if references to a symbol must be treated
349 differently depending on something about the variable or
350 function named by the symbol (such as what section it is in).
352 On s390, if using PIC, mark a SYMBOL_REF for a non-global symbol
353 so that we may access it directly in the GOT. */
355 #define ENCODE_SECTION_INFO(DECL) \
360 rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
361 ? TREE_CST_RTL (DECL) : DECL_RTL (DECL)); \
363 if (GET_CODE (rtl) == MEM) \
365 SYMBOL_REF_FLAG (XEXP (rtl, 0)) \
366 = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \
367 || ! TREE_PUBLIC (DECL)); \
374 /* This is an array of structures. Each structure initializes one pair
375 of eliminable registers. The "from" register number is given first,
376 followed by "to". Eliminations of the same "from" register are listed
377 in order of preference. */
379 #define ELIMINABLE_REGS \
380 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
381 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
382 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}}
384 #define CAN_ELIMINATE(FROM, TO) (1)
386 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
387 { if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
389 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
390 { (OFFSET) = s390_arg_frame_offset (); } \
391 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
392 { (OFFSET) = s390_arg_frame_offset (); } \
395 #define CAN_DEBUG_WITHOUT_FP
397 /* Value should be nonzero if functions must have frame pointers.
398 Zero means the frame pointer need not be set up (and parms may be
399 accessed via the stack pointer) in functions that seem suitable.
400 This is computed in `reload', in reload1.c. */
402 #define FRAME_POINTER_REQUIRED 0
404 /* Define the classes of registers for register constraints in the
405 machine description. Also define ranges of constants.
407 One of the classes must always be named ALL_REGS and include all hard regs.
408 If there is more than one class, another class must be named NO_REGS
409 and contain no registers.
411 The name GENERAL_REGS must be the name of a class (or an alias for
412 another name such as ALL_REGS). This is the class of registers
413 that is allowed by "g" or "r" in a register constraint.
414 Also, registers outside this class are allocated only when
415 instructions express preferences for them.
417 The classes must be numbered in nondecreasing order; that is,
418 a larger-numbered class must never be contained completely
419 in a smaller-numbered class.
421 For any two classes, it is very desirable that there be another
422 class that represents their union. */
424 /*#define SMALL_REGISTER_CLASSES 1*/
428 NO_REGS, ADDR_REGS, GENERAL_REGS,
429 FP_REGS, ALL_REGS, LIM_REG_CLASSES
432 #define N_REG_CLASSES (int) LIM_REG_CLASSES
434 /* Give names of register classes as strings for dump file. */
436 #define REG_CLASS_NAMES \
437 { "NO_REGS","ADDR_REGS", "GENERAL_REGS", "FP_REGS", "ALL_REGS" }
439 /* Define which registers fit in which classes. This is an initializer for
440 a vector of HARD_REG_SET of length N_REG_CLASSES.
441 G5 and latter have 16 register and support IEEE floating point operations. */
443 #define REG_CLASS_CONTENTS \
445 { 0x00000000, 0x00000000 }, /* NO_REGS */ \
446 { 0x0000fffe, 0x00000001 }, /* ADDR_REGS */ \
447 { 0x0000ffff, 0x00000001 }, /* GENERAL_REGS */ \
448 { 0xffff0000, 0x00000000 }, /* FP_REGS */ \
449 { 0xffffffff, 0x00000003 }, /* ALL_REGS */ \
453 /* The same information, inverted:
454 Return the class number of the smallest class containing
455 reg number REGNO. This could be a conditional expression
456 or could index an array. */
458 #define REGNO_REG_CLASS(REGNO) (regclass_map[REGNO])
460 extern enum reg_class regclass_map[]; /* smalled class containing REGNO */
462 /* The class value for index registers, and the one for base regs. */
464 #define INDEX_REG_CLASS ADDR_REGS
465 #define BASE_REG_CLASS ADDR_REGS
467 /* Get reg_class from a letter such as appears in the machine description. */
469 #define REG_CLASS_FROM_LETTER(C) \
470 ((C) == 'a' ? ADDR_REGS : \
471 (C) == 'd' ? GENERAL_REGS : \
472 (C) == 'f' ? FP_REGS : NO_REGS)
474 /* The letters I, J, K, L and M in a register constraint string can be used
475 to stand for particular ranges of immediate operands.
476 This macro defines what the ranges are.
477 C is the letter, and VALUE is a constant value.
478 Return 1 if VALUE is in the range specified by C. */
480 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
481 ((C) == 'I' ? (unsigned long) (VALUE) < 256 : \
482 (C) == 'J' ? (unsigned long) (VALUE) < 4096 : \
483 (C) == 'K' ? (VALUE) >= -32768 && (VALUE) < 32768 : \
484 (C) == 'L' ? (unsigned long) (VALUE) < 65536 : 0)
486 /* Similar, but for floating constants, and defining letters G and H.
487 Here VALUE is the CONST_DOUBLE rtx itself. */
489 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 1
491 /* 'Q' means a memory-reference for a S-type operand. */
493 #define EXTRA_CONSTRAINT(OP, C) \
494 ((C) == 'Q' ? s_operand (OP, GET_MODE (OP)) : \
495 (C) == 'S' ? larl_operand (OP, GET_MODE (OP)) : 0)
497 /* Given an rtx X being reloaded into a reg required to be in class CLASS,
498 return the class of reg to actually use. In general this is just CLASS;
499 but on some machines in some cases it is preferable to use a more
500 restrictive class. */
502 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
503 (GET_CODE (X) == CONST_DOUBLE ? \
504 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? FP_REGS : ADDR_REGS) :\
505 (GET_CODE (X) == CONST_INT ? \
506 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? FP_REGS : ADDR_REGS) :\
507 GET_CODE (X) == PLUS || \
508 GET_CODE (X) == LABEL_REF || \
509 GET_CODE (X) == SYMBOL_REF || \
510 GET_CODE (X) == CONST ? ADDR_REGS : (CLASS)))
512 /* Return the maximum number of consecutive registers needed to represent
513 mode MODE in a register of class CLASS. */
515 #define CLASS_MAX_NREGS(CLASS, MODE) \
516 ((CLASS) == FP_REGS ? \
517 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT ? 2 : 1) : \
518 (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
520 /* If we are copying between FP registers and anything else, we need a memory
523 #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \
524 ((CLASS1) != (CLASS2) && ((CLASS1) == FP_REGS || (CLASS2) == FP_REGS))
526 /* Get_secondary_mem widens its argument to BITS_PER_WORD which loses on 64bit
527 because the movsi and movsf patterns don't handle r/f moves. */
529 #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \
530 (GET_MODE_BITSIZE (MODE) < 32 \
531 ? mode_for_size (32, GET_MODE_CLASS (MODE), 0) \
535 /* A C expression whose value is nonzero if pseudos that have been
536 assigned to registers of class CLASS would likely be spilled
537 because registers of CLASS are needed for spill registers.
539 The default value of this macro returns 1 if CLASS has exactly one
540 register and zero otherwise. On most machines, this default
541 should be used. Only define this macro to some other expression
542 if pseudo allocated by `local-alloc.c' end up in memory because
543 their hard registers were needed for spill registers. If this
544 macro returns nonzero for those classes, those pseudos will only
545 be allocated by `global.c', which knows how to reallocate the
546 pseudo to another register. If there would not be another
547 register available for reallocation, you should not change the
548 definition of this macro since the only effect of such a
549 definition would be to slow down register allocation. */
551 /* Stack layout; function entry, exit and calling. */
553 /* The current return address is on Offset 56 of the current frame
554 if we are in an leaf_function. Otherwise we have to go one stack
556 The return address of anything farther back is accessed normally
557 at an offset of 56 from the frame pointer.
559 FIXME: builtin_return_addr does not work correctly in a leaf
560 function, we need to find way to find out, if we
561 are in a leaf function
564 #define _RETURN_ADDR_OFFSET (TARGET_64BIT ? 112 : 56)
566 #define RETURN_ADDR_RTX(count, frame) \
567 gen_rtx (MEM, Pmode, \
568 memory_address (Pmode, \
570 copy_to_reg (gen_rtx (MEM, Pmode, \
571 memory_address (Pmode, frame))), \
572 _RETURN_ADDR_OFFSET)));
574 /* The following macros will turn on dwarf2 exception hndling
575 Other code location for this exception handling are
576 in s390.md (eh_return insn) and in linux.c in the prologue. */
578 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, RETURN_REGNUM)
580 /* We have 31 bit mode. */
582 #define MASK_RETURN_ADDR (GEN_INT (0x7fffffff))
584 /* Location, from where return address to load. */
586 #define DWARF_FRAME_RETURN_COLUMN 14
588 /* Describe how we implement __builtin_eh_return. */
589 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 6 : INVALID_REGNUM)
590 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 10)
591 #define EH_RETURN_HANDLER_RTX \
592 gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, \
593 TARGET_64BIT? -48 : -40))
595 /* Define this if pushing a word on the stack makes the stack pointer a
598 #define STACK_GROWS_DOWNWARD
600 /* Define this if the nominal address of the stack frame is at the
601 high-address end of the local variables; that is, each additional local
602 variable allocated goes at a more negative offset in the frame. */
604 /* #define FRAME_GROWS_DOWNWARD */
606 /* Offset from stack-pointer to first location of outgoing args. */
608 #define STACK_POINTER_OFFSET (TARGET_64BIT ? 160 : 96)
610 /* Offset within stack frame to start allocating local variables at.
611 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
612 first local allocated. Otherwise, it is the offset to the BEGINNING
613 of the first local allocated. */
615 #define STARTING_FRAME_OFFSET \
616 (STACK_POINTER_OFFSET + current_function_outgoing_args_size)
618 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0
620 /* If we generate an insn to push BYTES bytes, this says how many the stack
621 pointer really advances by. On S/390, we have no push instruction. */
623 /* #define PUSH_ROUNDING(BYTES) */
625 /* Accumulate the outgoing argument count so we can request the right
626 DSA size and determine stack offset. */
628 #define ACCUMULATE_OUTGOING_ARGS 1
630 /* Offset from the stack pointer register to an item dynamically
631 allocated on the stack, e.g., by `alloca'.
633 The default value for this macro is `STACK_POINTER_OFFSET' plus the
634 length of the outgoing arguments. The default is correct for most
635 machines. See `function.c' for details. */
636 #define STACK_DYNAMIC_OFFSET(FUNDECL) (STARTING_FRAME_OFFSET)
638 /* Offset of first parameter from the argument pointer register value.
639 On the S/390, we define the argument pointer to the start of the fixed
641 #define FIRST_PARM_OFFSET(FNDECL) 0
643 /* Define this if stack space is still allocated for a parameter passed
644 in a register. The value is the number of bytes allocated to this
646 /* #define REG_PARM_STACK_SPACE(FNDECL) 32 */
648 /* Define this if the above stack space is to be considered part of the
649 space allocated by the caller. */
650 /* #define OUTGOING_REG_PARM_STACK_SPACE */
652 /* 1 if N is a possible register number for function argument passing.
653 On S390, general registers 2 - 6 and floating point register 0 and 2
654 are used in this way. */
656 #define FUNCTION_ARG_REGNO_P(N) (((N) >=2 && (N) <7) || \
657 (N) == 16 || (N) == 17)
659 /* Define a data type for recording info about an argument list during
660 the scan of that argument list. This data type should hold all
661 necessary information about the function itself and about the args
662 processed so far, enough to enable macros such as FUNCTION_ARG to
663 determine where the next arg should go. */
665 typedef struct s390_arg_structure
667 int gprs; /* gpr so far */
668 int fprs; /* fpr so far */
673 /* Initialize a variable CUM of type CUMULATIVE_ARGS for a call to
674 a function whose data type is FNTYPE.
675 For a library call, FNTYPE is 0. */
677 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, NN) \
678 ((CUM).gprs=0, (CUM).fprs=0)
680 /* Update the data in CUM to advance over an argument of mode MODE and
681 data type TYPE. (TYPE is null for libcalls where that information
682 may not be available.) */
684 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
685 s390_function_arg_advance (&CUM, MODE, TYPE, NAMED)
687 /* Define where to put the arguments to a function. Value is zero to push
688 the argument on the stack, or a hard register in which to store the
691 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
692 s390_function_arg (&CUM, MODE, TYPE, NAMED)
694 /* Define where to expect the arguments of a function. Value is zero, if
695 the argument is on the stack, or a hard register in which the argument
696 is stored. It is the same like FUNCTION_ARG, except for unnamed args
697 That means, that all in case of varargs used, the arguments are expected
699 S/390 has already space on the stack for args coming in registers,
700 they are pushed in prologue, if needed. */
703 /* Define the `__builtin_va_list' type. */
705 #define BUILD_VA_LIST_TYPE(VALIST) \
706 (VALIST) = s390_build_va_list ()
708 /* Implement `va_start' for varargs and stdarg. */
710 #define EXPAND_BUILTIN_VA_START(stdarg, valist, nextarg) \
711 s390_va_start (stdarg, valist, nextarg)
713 /* Implement `va_arg'. */
715 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
716 s390_va_arg (valist, type)
718 /* For an arg passed partly in registers and partly in memory, this is the
719 number of registers used. For args passed entirely in registers or
720 entirely in memory, zero. */
722 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
725 /* Define if returning from a function call automatically pops the
726 arguments described by the number-of-args field in the call. */
728 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
731 /* Define how to find the value returned by a function. VALTYPE is the
732 data type of the value (as a tree).
733 If the precise function being called is known, FUNC is its FUNCTION_DECL;
734 otherwise, FUNC is 15. */
736 #define RET_REG(MODE) ((GET_MODE_CLASS (MODE) == MODE_INT \
737 || TARGET_SOFT_FLOAT ) ? 2 : 16)
740 /* for structs the address is passed, and the Callee makes a
741 copy, only if needed */
743 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
744 s390_function_arg_pass_by_reference (MODE, TYPE)
747 /* Register 2 (and 3) for integral values
748 or floating point register 0 (and 2) for fp values are used. */
750 #define FUNCTION_VALUE(VALTYPE, FUNC) \
751 gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \
752 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
753 || POINTER_TYPE_P (VALTYPE) \
754 ? word_mode : TYPE_MODE (VALTYPE), \
755 TREE_CODE (VALTYPE) == REAL_TYPE && TARGET_HARD_FLOAT ? 16 : 2)
757 /* Define how to find the value returned by a library function assuming
758 the value has mode MODE. */
760 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, RET_REG (MODE))
762 /* 1 if N is a possible register number for a function value. */
764 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 2 || (N) == 16)
766 /* The definition of this macro implies that there are cases where
767 a scalar value cannot be returned in registers. */
769 #define RETURN_IN_MEMORY(type) \
770 (TYPE_MODE (type) == BLKmode || \
771 GET_MODE_CLASS (TYPE_MODE (type)) == MODE_COMPLEX_INT || \
772 GET_MODE_CLASS (TYPE_MODE (type)) == MODE_COMPLEX_FLOAT)
774 /* Mode of stack savearea.
775 FUNCTION is VOIDmode because calling convention maintains SP.
776 BLOCK needs Pmode for SP.
777 NONLOCAL needs twice Pmode to maintain both backchain and SP. */
779 #define STACK_SAVEAREA_MODE(LEVEL) \
780 (LEVEL == SAVE_FUNCTION ? VOIDmode \
781 : LEVEL == SAVE_NONLOCAL ? (TARGET_64BIT ? TImode : DImode) : Pmode)
783 /* Structure value address is passed as invisible first argument (gpr 2). */
785 #define STRUCT_VALUE 0
787 /* This macro definition sets up a default value for `main' to return. */
789 #define DEFAULT_MAIN_RETURN c_expand_return (integer_zero_node)
791 /* Length in units of the trampoline for entering a nested function. */
793 #define TRAMPOLINE_SIZE (TARGET_64BIT ? 36 : 20)
795 /* Initialize the dynamic part of trampoline. */
797 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
798 s390_initialize_trampoline ((ADDR), (FNADDR), (CXT))
800 /* Template for constant part of trampoline. */
802 #define TRAMPOLINE_TEMPLATE(FILE) \
803 s390_trampoline_template (FILE)
805 /* Output assembler code to FILE to increment profiler label # LABELNO
806 for profiling a function entry. */
808 #define FUNCTION_PROFILER(FILE, LABELNO) \
810 extern rtx s390_profile[]; \
811 extern int s390_pool_count; \
813 static char label[128]; \
814 fprintf (FILE, "# function profiler \n"); \
818 output_asm_insn ("stg\t14,8(15)", tmp); \
819 sprintf (label, "%sP%d", LPREFIX, LABELNO); \
820 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, label); \
821 SYMBOL_REF_FLAG (tmp[0]) = 1; \
822 output_asm_insn ("larl\t1,%0", tmp); \
823 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, "_mcount"); \
826 tmp[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, tmp[0]), 113); \
827 tmp[0] = gen_rtx_CONST (Pmode, tmp[0]); \
829 output_asm_insn ("brasl\t14,%0", tmp); \
830 output_asm_insn ("lg\t14,8(15)", tmp); \
834 output_asm_insn ("l 14,4(15)", s390_profile); \
835 s390_pool_count = 0; \
836 output_asm_insn ("st 14,4(15)", s390_profile); \
837 output_asm_insn ("l 14,%4", s390_profile); \
838 output_asm_insn ("l 1,%9", s390_profile); \
841 output_asm_insn ("ar 1,13", s390_profile); \
842 output_asm_insn ("bas 14,0(14,13)", s390_profile); \
846 output_asm_insn ("basr 14,14", s390_profile); \
848 output_asm_insn ("l 14,4(15)", s390_profile); \
852 /* #define PROFILE_BEFORE_PROLOGUE */
854 /* There are three profiling modes for basic blocks available.
855 The modes are selected at compile time by using the options
856 -a or -ax of the gnu compiler.
857 The variable `profile_block_flag' will be set according to the
860 profile_block_flag == 0, no option used:
864 profile_block_flag == 1, -a option used.
866 Count frequency of execution of every basic block.
868 profile_block_flag == 2, -ax option used.
870 Generate code to allow several different profiling modes at run time.
872 Produce a trace of all basic blocks.
873 Count frequency of jump instructions executed.
874 In every mode it is possible to start profiling upon entering
875 certain functions and to disable profiling of some other functions.
877 The result of basic-block profiling will be written to a file `bb.out'.
878 If the -ax option is used parameters for the profiling will be read
883 /* The following macro shall output assembler code to FILE
884 to initialize basic-block profiling.
886 If profile_block_flag == 2
888 Output code to call the subroutine `__bb_init_trace_func'
889 and pass two parameters to it. The first parameter is
890 the address of a block allocated in the object module.
891 The second parameter is the number of the first basic block
894 The name of the block is a local symbol made with this statement:
896 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
898 Of course, since you are writing the definition of
899 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
900 can take a short cut in the definition of this macro and use the
901 name that you know will result.
903 The number of the first basic block of the function is
904 passed to the macro in BLOCK_OR_LABEL.
906 If described in a virtual assembler language the code to be
910 parameter2 <- BLOCK_OR_LABEL
911 call __bb_init_trace_func
913 else if profile_block_flag != 0
915 Output code to call the subroutine `__bb_init_func'
916 and pass one single parameter to it, which is the same
917 as the first parameter to `__bb_init_trace_func'.
919 The first word of this parameter is a flag which will be nonzero if
920 the object module has already been initialized. So test this word
921 first, and do not call `__bb_init_func' if the flag is nonzero.
922 Note: When profile_block_flag == 2 the test need not be done
923 but `__bb_init_trace_func' *must* be called.
925 BLOCK_OR_LABEL may be used to generate a label number as a
926 branch destination in case `__bb_init_func' will not be called.
928 If described in a virtual assembler language the code to be
939 #undef FUNCTION_BLOCK_PROFILER
940 #define FUNCTION_BLOCK_PROFILER(FILE, BLOCK_OR_LABEL) \
946 fprintf (FILE, "# function block profiler %d \n", profile_block_flag); \
947 output_asm_insn ("ipm 0", tmp); \
948 output_asm_insn ("aghi 15,-224", tmp); \
949 output_asm_insn ("stmg 14,5,160(15)", tmp); \
950 output_asm_insn ("larl 2,.LPBX0", tmp); \
951 switch (profile_block_flag) \
954 if (BLOCK_OR_LABEL < 0x10000) { \
955 tmp[0] = gen_rtx_CONST_INT (Pmode, (BLOCK_OR_LABEL)); \
956 output_asm_insn ("llill 3,%x0", tmp); \
958 int bo = BLOCK_OR_LABEL; \
959 tmp[0] = gen_rtx_CONST_INT (Pmode, bo&0x7fff); \
960 output_asm_insn ("llill 3,%x0", tmp); \
961 tmp[0] = gen_rtx_CONST_INT (Pmode, (bo&0xffff0000)>>16); \
962 output_asm_insn ("iilh 3,%x0", tmp); \
964 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, "__bb_init_trace_func"); \
967 tmp[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, tmp[0]), 113); \
968 tmp[0] = gen_rtx_CONST (Pmode, tmp[0]); \
970 output_asm_insn ("brasl\t14,%0", tmp); \
973 output_asm_insn ("cli 7(2),0", tmp); \
974 output_asm_insn ("jne 2f", tmp); \
975 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, "__bb_init_func"); \
978 tmp[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, tmp[0]), 113); \
979 tmp[0] = gen_rtx_CONST (Pmode, tmp[0]); \
981 output_asm_insn ("brasl\t14,%0", tmp); \
984 output_asm_insn ("2:", tmp); \
985 output_asm_insn ("lmg 14,5,160(15)", tmp); \
986 output_asm_insn ("aghi 15,224", tmp); \
987 output_asm_insn ("spm 0", tmp); \
991 extern rtx s390_profile[]; \
992 fprintf (FILE, "# function block profiler %d \n", profile_block_flag); \
993 output_asm_insn ("ipm 0", s390_profile); \
994 output_asm_insn ("ahi 15,-128", s390_profile); \
995 output_asm_insn ("stm 14,5,96(15)", s390_profile); \
996 output_asm_insn ("l 2,%6", s390_profile); \
998 output_asm_insn ("ar 2,13", s390_profile); \
999 switch (profile_block_flag) \
1002 output_asm_insn ("l 4,%1", s390_profile); \
1003 if (BLOCK_OR_LABEL < 0x8000) { \
1004 s390_profile[8] = gen_rtx_CONST_INT (Pmode, (BLOCK_OR_LABEL)); \
1005 output_asm_insn ("lhi 3,%8", s390_profile); \
1007 int bo = BLOCK_OR_LABEL; \
1008 s390_profile[8] = gen_rtx_CONST_INT (Pmode, (bo&0xffff8000)>>15); \
1009 output_asm_insn ("lhi 3,%8", s390_profile); \
1010 output_asm_insn ("sll 3,15", s390_profile); \
1011 s390_profile[8] = gen_rtx_CONST_INT (Pmode, bo&0x7fff); \
1012 output_asm_insn ("ahi 3,%8", s390_profile); \
1016 output_asm_insn ("l 4,%0", s390_profile); \
1017 output_asm_insn ("cli 3(2),0", s390_profile); \
1018 output_asm_insn ("jne 2f", s390_profile); \
1022 output_asm_insn ("bas 14,0(4,13)", s390_profile); \
1024 output_asm_insn ("basr 14,4", s390_profile); \
1025 output_asm_insn ("2:", s390_profile); \
1026 output_asm_insn ("lm 14,5,96(15)", s390_profile); \
1027 output_asm_insn ("ahi 15,128", s390_profile); \
1028 output_asm_insn ("spm 0", s390_profile); \
1032 /* The following macro shall output assembler code to FILE
1033 to increment a counter associated with basic block number BLOCKNO.
1035 If profile_block_flag == 2
1037 Output code to initialize the global structure `__bb' and
1038 call the function `__bb_trace_func' which will increment the
1041 `__bb' consists of two words. In the first word the number
1042 of the basic block has to be stored. In the second word
1043 the address of a block allocated in the object module
1046 The basic block number is given by BLOCKNO.
1048 The address of the block is given by the label created with
1050 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
1052 by FUNCTION_BLOCK_PROFILER.
1054 Of course, since you are writing the definition of
1055 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
1056 can take a short cut in the definition of this macro and use the
1057 name that you know will result.
1059 If described in a virtual assembler language the code to be
1062 move BLOCKNO -> (__bb)
1063 move LPBX0 -> (__bb+4)
1064 call __bb_trace_func
1066 Note that function `__bb_trace_func' must not change the
1067 machine state, especially the flag register. To grant
1068 this, you must output code to save and restore registers
1069 either in this macro or in the macros MACHINE_STATE_SAVE
1070 and MACHINE_STATE_RESTORE. The last two macros will be
1071 used in the function `__bb_trace_func', so you must make
1072 sure that the function prologue does not change any
1073 register prior to saving it with MACHINE_STATE_SAVE.
1075 else if profile_block_flag != 0
1077 Output code to increment the counter directly.
1078 Basic blocks are numbered separately from zero within each
1079 compiled object module. The count associated with block number
1080 BLOCKNO is at index BLOCKNO in an array of words; the name of
1081 this array is a local symbol made with this statement:
1083 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
1085 Of course, since you are writing the definition of
1086 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro, you
1087 can take a short cut in the definition of this macro and use the
1088 name that you know will result.
1090 If described in a virtual assembler language the code to be
1093 inc (LPBX2+4*BLOCKNO)
1097 #define BLOCK_PROFILER(FILE, BLOCKNO) \
1103 fprintf (FILE, "# block profiler %d block %d \n", \
1104 profile_block_flag, BLOCKNO); \
1105 output_asm_insn ("ipm 14", tmp); \
1106 output_asm_insn ("aghi 15,-224", tmp); \
1107 output_asm_insn ("stmg 14,5,160(15)", tmp); \
1108 output_asm_insn ("larl 2,_bb", tmp); \
1109 if ((BLOCKNO*8) < 0x10000) { \
1110 tmp[0] = gen_rtx_CONST_INT (Pmode, (BLOCKNO*8)); \
1111 output_asm_insn ("llill 3,%x0", tmp); \
1113 int bo = BLOCKNO*8; \
1114 tmp[0] = gen_rtx_CONST_INT (Pmode, bo&0xffff); \
1115 output_asm_insn ("llill 3,%x0", tmp); \
1116 tmp[0] = gen_rtx_CONST_INT (Pmode, (bo&0xffff0000)>>16); \
1117 output_asm_insn ("iilh 3,%x0", tmp); \
1119 switch (profile_block_flag) \
1122 output_asm_insn ("stg 3,0(2)", tmp); \
1123 output_asm_insn ("larl 3,.LPBX0", tmp); \
1124 output_asm_insn ("stg 3,0(2)", tmp); \
1125 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, "__bb_trace_func"); \
1128 tmp[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, tmp[0]), 113); \
1129 tmp[0] = gen_rtx_CONST (Pmode, tmp[0]); \
1131 output_asm_insn ("brasl\t14,%0", tmp); \
1134 output_asm_insn ("larl 2,.LPBX2", tmp); \
1135 output_asm_insn ("la 2,0(2,3)", tmp); \
1136 output_asm_insn ("lg 3,0(2)", tmp); \
1137 output_asm_insn ("aghi 3,1", tmp); \
1138 output_asm_insn ("stg 3,0(2)", tmp); \
1141 output_asm_insn ("lmg 14,5,160(15)", tmp); \
1142 output_asm_insn ("ahi 15,224", tmp); \
1143 output_asm_insn ("spm 14", tmp); \
1147 extern rtx s390_profile[]; \
1148 fprintf (FILE, "# block profiler %d block %d \n", \
1149 profile_block_flag,BLOCKNO); \
1150 output_asm_insn ("ipm 14", s390_profile); \
1151 output_asm_insn ("ahi 15,-128", s390_profile); \
1152 output_asm_insn ("stm 14,5,96(15)", s390_profile); \
1153 switch (profile_block_flag) \
1156 output_asm_insn ("l 4,%2", s390_profile); \
1157 output_asm_insn ("l 2,%5", s390_profile); \
1159 output_asm_insn ("ar 2,13", s390_profile); \
1160 if (BLOCKNO < 0x8000) { \
1161 s390_profile[7] = gen_rtx_CONST_INT (Pmode, (BLOCKNO)*4); \
1162 output_asm_insn ("lhi 3,%8", s390_profile); \
1165 s390_profile[8] = gen_rtx_CONST_INT (Pmode, (bo&0xffff8000)>>15); \
1166 output_asm_insn ("lhi 3,%8", s390_profile); \
1167 output_asm_insn ("sll 3,15", s390_profile); \
1168 s390_profile[8] = gen_rtx_CONST_INT (Pmode, bo&0x7fff); \
1169 output_asm_insn ("ahi 3,%7", s390_profile); \
1171 output_asm_insn ("st 3,0(2)", s390_profile); \
1172 output_asm_insn ("mvc 0(4,2),%5", s390_profile); \
1174 output_asm_insn ("bas 14,0(4,13)", s390_profile); \
1176 output_asm_insn ("basr 14,4", s390_profile); \
1179 if (BLOCKNO < 0x2000) { \
1180 s390_profile[8] = gen_rtx_CONST_INT (Pmode, (BLOCKNO)*4); \
1181 output_asm_insn ("lhi 2,%8", s390_profile); \
1183 int bo = BLOCKNO*4; \
1184 s390_profile[8] = gen_rtx_CONST_INT (Pmode, (bo&0xffff8000)>>15); \
1185 output_asm_insn ("lhi 2,%8", s390_profile); \
1186 output_asm_insn ("sll 2,15", s390_profile); \
1187 s390_profile[8] = gen_rtx_CONST_INT (Pmode, bo&0x7fff); \
1188 output_asm_insn ("ahi 2,%8", s390_profile); \
1190 output_asm_insn ("a 2,%7", s390_profile); \
1192 output_asm_insn ("l 3,0(2,13)", s390_profile); \
1194 output_asm_insn ("l 3,0(2)", s390_profile); \
1195 output_asm_insn ("ahi 3,1", s390_profile); \
1197 output_asm_insn ("st 3,0(2,13)", s390_profile); \
1199 output_asm_insn ("st 3,0(2)", s390_profile); \
1202 output_asm_insn ("lm 14,5,96(15)", s390_profile); \
1203 output_asm_insn ("ahi 15,128", s390_profile); \
1204 output_asm_insn ("spm 14", s390_profile); \
1209 /* The following macro shall output assembler code to FILE
1210 to indicate a return from function during basic-block profiling.
1212 If profiling_block_flag == 2:
1214 Output assembler code to call function `__bb_trace_ret'.
1216 Note that function `__bb_trace_ret' must not change the
1217 machine state, especially the flag register. To grant
1218 this, you must output code to save and restore registers
1219 either in this macro or in the macros MACHINE_STATE_SAVE_RET
1220 and MACHINE_STATE_RESTORE_RET. The last two macros will be
1221 used in the function `__bb_trace_ret', so you must make
1222 sure that the function prologue does not change any
1223 register prior to saving it with MACHINE_STATE_SAVE_RET.
1225 else if profiling_block_flag != 0:
1227 The macro will not be used, so it need not distinguish
1231 #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) \
1236 fprintf (FILE, "# block profiler exit \n"); \
1237 output_asm_insn ("ipm 14", tmp); \
1238 output_asm_insn ("aghi 15,-224", tmp); \
1239 output_asm_insn ("stmg 14,5,160(15)", tmp); \
1240 tmp[0] = gen_rtx_SYMBOL_REF (Pmode, "__bb_trace_ret"); \
1243 tmp[0] = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, tmp[0]), 113); \
1244 tmp[0] = gen_rtx_CONST (Pmode, tmp[0]); \
1246 output_asm_insn ("brasl 14,%0", tmp); \
1247 output_asm_insn ("lmg 14,5,160(15)", tmp); \
1248 output_asm_insn ("aghi 15,224", tmp); \
1249 output_asm_insn ("spm 14", tmp); \
1253 extern rtx s390_profile[]; \
1254 fprintf (FILE, "# block profiler exit \n"); \
1255 output_asm_insn ("ipm 14", s390_profile); \
1256 output_asm_insn ("ahi 15,-128", s390_profile); \
1257 output_asm_insn ("stm 14,5,96(15)", s390_profile); \
1258 output_asm_insn ("l 4,%3", s390_profile); \
1260 output_asm_insn ("bas 14,0(4,13)", s390_profile); \
1262 output_asm_insn ("basr 14,4", s390_profile); \
1263 output_asm_insn ("lm 14,5,96(15)", s390_profile); \
1264 output_asm_insn ("ahi 15,128", s390_profile); \
1265 output_asm_insn ("spm 14", s390_profile); \
1269 /* The function `__bb_trace_func' is called in every basic block
1270 and is not allowed to change the machine state. Saving (restoring)
1271 the state can either be done in the BLOCK_PROFILER macro,
1272 before calling function (rsp. after returning from function)
1273 `__bb_trace_func', or it can be done inside the function by
1274 defining the macros:
1276 MACHINE_STATE_SAVE(ID)
1277 MACHINE_STATE_RESTORE(ID)
1279 In the latter case care must be taken, that the prologue code
1280 of function `__bb_trace_func' does not already change the
1281 state prior to saving it with MACHINE_STATE_SAVE.
1283 The parameter `ID' is a string identifying a unique macro use.
1285 On the s390 all save/restore is done in macros above
1289 #define MACHINE_STATE_SAVE(ID) \
1290 fprintf (FILE, "\tahi 15,-128 # save state\n"); \
1291 fprintf (FILE, "\tstm 14,5,96(15)\n"); \
1293 #define MACHINE_STATE_RESTORE(ID) \
1294 fprintf (FILE, "\tlm 14,5,96(15) # restore state\n"); \
1295 fprintf (FILE, "\tahi 15,128\n"); \
1299 /* Define EXIT_IGNORE_STACK if, when returning from a function, the stack
1300 pointer does not matter (provided there is a frame pointer). */
1302 #define EXIT_IGNORE_STACK 1
1304 /* Addressing modes, and classification of registers for them. */
1306 /* #define HAVE_POST_INCREMENT */
1307 /* #define HAVE_POST_DECREMENT */
1309 /* #define HAVE_PRE_DECREMENT */
1310 /* #define HAVE_PRE_INCREMENT */
1312 /* These assume that REGNO is a hard or pseudo reg number. They give
1313 nonzero only if REGNO is a hard reg of the suitable class or a pseudo
1314 reg currently allocated to a suitable hard reg.
1315 These definitions are NOT overridden anywhere. */
1317 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1318 (((REGNO) > 0 && (REGNO) < 16) || (REGNO) == ARG_POINTER_REGNUM \
1319 /* || (REGNO) == FRAME_POINTER_REGNUM */ \
1320 || (reg_renumber[REGNO] > 0 && reg_renumber[REGNO] < 16))
1322 #define REGNO_OK_FOR_BASE_P(REGNO) REGNO_OK_FOR_INDEX_P (REGNO)
1324 #define REGNO_OK_FOR_DATA_P(REGNO) \
1325 ((REGNO) < 16 || (unsigned) reg_renumber[REGNO] < 16)
1327 #define REGNO_OK_FOR_FP_P(REGNO) \
1328 FLOAT_REGNO_P (REGNO)
1330 /* Now macros that check whether X is a register and also,
1331 strictly, whether it is in a specified class. */
1333 /* 1 if X is a data register. */
1335 #define DATA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_DATA_P (REGNO (X)))
1337 /* 1 if X is an fp register. */
1339 #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
1341 /* 1 if X is an address register. */
1343 #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
1345 /* Maximum number of registers that can appear in a valid memory address. */
1347 #define MAX_REGS_PER_ADDRESS 2
1349 /* Recognize any constant value that is a valid address. */
1351 #define CONSTANT_ADDRESS_P(X) 0
1353 #define SYMBOLIC_CONST(X) \
1354 (GET_CODE (X) == SYMBOL_REF \
1355 || GET_CODE (X) == LABEL_REF \
1356 || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X)))
1358 /* General operand is everything except SYMBOL_REF, CONST and CONST_DOUBLE
1359 they have to be forced to constant pool
1360 CONST_INT have to be forced into constant pool, if greater than
1361 64k. Depending on the insn they have to be force into constant pool
1362 for smaller value; in this case we have to work with nonimmediate operand. */
1364 #define LEGITIMATE_PIC_OPERAND_P(X) \
1365 legitimate_pic_operand_p (X)
1367 /* Nonzero if the constant value X is a legitimate general operand.
1368 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
1370 #define LEGITIMATE_CONSTANT_P(X) \
1371 legitimate_constant_p (X)
1373 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx and check
1374 its validity for a certain class. We have two alternate definitions
1375 for each of them. The usual definition accepts all pseudo regs; the
1376 other rejects them all. The symbol REG_OK_STRICT causes the latter
1377 definition to be used.
1379 Most source files want to accept pseudo regs in the hope that they will
1380 get allocated to the class that the insn wants them to be in.
1381 Some source files that are used after register allocation
1382 need to be strict. */
1385 * Nonzero if X is a hard reg that can be used as an index or if it is
1389 #define REG_OK_FOR_INDEX_NONSTRICT_P(X) \
1390 ((GET_MODE (X) == Pmode) && \
1391 ((REGNO (X) > 0 && REGNO (X) < 16) || \
1392 (REGNO (X) == ARG_POINTER_REGNUM) || \
1393 (REGNO (X) >= FIRST_PSEUDO_REGISTER)))
1395 /* Nonzero if X is a hard reg that can be used as a base reg or if it is
1398 #define REG_OK_FOR_BASE_NONSTRICT_P(X) REG_OK_FOR_INDEX_NONSTRICT_P (X)
1400 /* Nonzero if X is a hard reg that can be used as an index. */
1402 #define REG_OK_FOR_INDEX_STRICT_P(X) \
1403 ((GET_MODE (X) == Pmode) && (REGNO_OK_FOR_INDEX_P (REGNO (X))))
1405 /* Nonzero if X is a hard reg that can be used as a base reg. */
1407 #define REG_OK_FOR_BASE_STRICT_P(X) \
1408 ((GET_MODE (X) == Pmode) && (REGNO_OK_FOR_BASE_P (REGNO (X))))
1411 #ifndef REG_OK_STRICT
1412 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P(X)
1413 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P(X)
1415 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P(X)
1416 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P(X)
1420 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression that is a
1421 valid memory address for an instruction.
1422 The MODE argument is the machine mode for the MEM expression
1423 that wants to use this address.
1425 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
1426 except for CONSTANT_ADDRESS_P which is actually machine-independent. */
1428 #ifdef REG_OK_STRICT
1429 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1431 if (legitimate_address_p (MODE, X, 1)) \
1435 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1437 if (legitimate_address_p (MODE, X, 0)) \
1443 /* S/390 has no mode dependent addresses. */
1445 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
1447 /* Try machine-dependent ways of modifying an illegitimate address
1448 to be legitimate. If we find one, return the new, valid address.
1449 This macro is used in only one place: `memory_address' in explow.c. */
1451 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
1453 (X) = legitimize_address (X, OLDX, MODE); \
1454 if (memory_address_p (MODE, X)) \
1458 /* Specify the machine mode that this machine uses for the index in the
1459 tablejump instruction. */
1461 #define CASE_VECTOR_MODE (TARGET_64BIT ? DImode : SImode)
1463 /* Define this if the tablejump instruction expects the table to contain
1464 offsets from the address of the table.
1465 Do not define this if the table should contain absolute addresses. */
1467 /* #define CASE_VECTOR_PC_RELATIVE */
1469 /* Load from integral MODE < SI from memory into register makes sign_extend
1471 In our case sign_extension happens for Halfwords, other no extension. */
1473 #define LOAD_EXTEND_OP(MODE) \
1474 (TARGET_64BIT ? ((MODE) == QImode ? ZERO_EXTEND : \
1475 (MODE) == HImode ? SIGN_EXTEND : NIL) \
1476 : ((MODE) == HImode ? SIGN_EXTEND : NIL))
1478 /* Specify the tree operation to be used to convert reals to integers. */
1480 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1482 /* Define this if fixuns_trunc is the same as fix_trunc. */
1484 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
1486 /* We use "unsigned char" as default. */
1488 #define DEFAULT_SIGNED_CHAR 0
1490 /* This is the kind of divide that is easiest to do in the general case. */
1492 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1494 /* Max number of bytes we can move from memory to memory in one reasonably
1495 fast instruction. */
1497 #define MOVE_MAX 256
1499 /* Define this if zero-extension is slow (more than one real instruction). */
1501 #define SLOW_ZERO_EXTEND
1503 /* Nonzero if access to memory by bytes is slow and undesirable. */
1505 #define SLOW_BYTE_ACCESS 1
1507 /* Define if shifts truncate the shift count which implies one can omit
1508 a sign-extension or zero-extension of a shift count. */
1510 /* #define SHIFT_COUNT_TRUNCATED */
1512 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1513 is done just by pretending it is already truncated. */
1515 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1517 /* We assume that the store-condition-codes instructions store 0 for false
1518 and some other value for true. This is the value stored for true. */
1520 /* #define STORE_FLAG_VALUE -1 */
1522 /* When a prototype says `char' or `short', really pass an `int'. */
1524 #define PROMOTE_PROTOTYPES 1
1526 /* Don't perform CSE on function addresses. */
1528 #define NO_FUNCTION_CSE
1530 /* Specify the machine mode that pointers have.
1531 After generation of rtl, the compiler makes no further distinction
1532 between pointers and any other objects of this machine mode. */
1534 #define Pmode ((enum machine_mode) (TARGET_64BIT ? DImode : SImode))
1536 /* A function address in a call instruction is a byte address (for
1537 indexing purposes) so give the MEM rtx a byte's mode. */
1539 #define FUNCTION_MODE QImode
1542 /* A part of a C `switch' statement that describes the relative costs
1543 of constant RTL expressions. It must contain `case' labels for
1544 expression codes `const_int', `const', `symbol_ref', `label_ref'
1545 and `const_double'. Each case must ultimately reach a `return'
1546 statement to return the relative cost of the use of that kind of
1547 constant value in an expression. The cost may depend on the
1548 precise value of the constant, which is available for examination
1549 in X, and the rtx code of the expression in which it is contained,
1550 found in OUTER_CODE.
1552 CODE is the expression code--redundant, since it can be obtained
1553 with `GET_CODE (X)'. */
1554 /* Force_const_mem does not work out of reload, because the saveable_obstack
1555 is set to reload_obstack, which does not live long enough.
1556 Because of this we cannot use force_const_mem in addsi3.
1557 This leads to problems with gen_add2_insn with a constant greater
1558 than a short. Because of that we give a addition of greater
1559 constants a cost of 3 (reload1.c 10096). */
1562 #define CONST_COSTS(RTX, CODE, OUTER_CODE) \
1564 if ((GET_CODE (XEXP (RTX, 0)) == MINUS) && \
1565 (GET_CODE (XEXP (XEXP (RTX, 0), 1)) != CONST_INT)) \
1568 if ((OUTER_CODE == PLUS) && \
1569 ((INTVAL (RTX) > 32767) || \
1570 (INTVAL (RTX) < -32768))) \
1571 return COSTS_N_INSNS (3); \
1574 case CONST_DOUBLE: \
1578 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions.
1579 This can be used, for example, to indicate how costly a multiply
1580 instruction is. In writing this macro, you can use the construct
1581 `COSTS_N_INSNS (N)' to specify a cost equal to N fast
1582 instructions. OUTER_CODE is the code of the expression in which X
1585 This macro is optional; do not define it if the default cost
1586 assumptions are adequate for the target machine. */
1588 #define RTX_COSTS(X, CODE, OUTER_CODE) \
1601 if (GET_MODE (XEXP (X, 0)) == DImode) \
1612 /* An expression giving the cost of an addressing mode that contains
1613 ADDRESS. If not defined, the cost is computed from the ADDRESS
1614 expression and the `CONST_COSTS' values.
1616 For most CISC machines, the default cost is a good approximation
1617 of the true cost of the addressing mode. However, on RISC
1618 machines, all instructions normally have the same length and
1619 execution time. Hence all addresses will have equal costs.
1621 In cases where more than one form of an address is known, the form
1622 with the lowest cost will be used. If multiple forms have the
1623 same, lowest, cost, the one that is the most complex will be used.
1625 For example, suppose an address that is equal to the sum of a
1626 register and a constant is used twice in the same basic block.
1627 When this macro is not defined, the address will be computed in a
1628 register and memory references will be indirect through that
1629 register. On machines where the cost of the addressing mode
1630 containing the sum is no higher than that of a simple indirect
1631 reference, this will produce an additional instruction and
1632 possibly require an additional register. Proper specification of
1633 this macro eliminates this overhead for such machines.
1635 Similar use of this macro is made in strength reduction of loops.
1637 ADDRESS need not be valid as an address. In such a case, the cost
1638 is not relevant and can be any value; invalid addresses need not be
1639 assigned a different cost.
1641 On machines where an address involving more than one register is as
1642 cheap as an address computation involving only one register,
1643 defining `ADDRESS_COST' to reflect this can cause two registers to
1644 be live over a region of code where only one would have been if
1645 `ADDRESS_COST' were not defined in that manner. This effect should
1646 be considered in the definition of this macro. Equivalent costs
1647 should probably only be given to addresses with different numbers
1648 of registers on machines with lots of registers.
1650 This macro will normally either not be defined or be defined as a
1653 On s390 symbols are expensive if compiled with fpic
1656 #define ADDRESS_COST(RTX) \
1657 ((flag_pic && GET_CODE (RTX) == SYMBOL_REF) ? 2 : 1)
1659 /* On s390, copy between fprs and gprs is expensive. */
1661 #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \
1662 (((CLASS1 != CLASS2) && \
1663 (CLASS1 == FP_REGS || CLASS2 == FP_REGS)) ? 10 : 1)
1666 /* A C expression for the cost of moving data of mode M between a
1667 register and memory. A value of 2 is the default; this cost is
1668 relative to those in `REGISTER_MOVE_COST'.
1670 If moving between registers and memory is more expensive than
1671 between two registers, you should define this macro to express the
1674 #define MEMORY_MOVE_COST(M, C, I) 1
1676 /* A C expression for the cost of a branch instruction. A value of 1
1677 is the default; other values are interpreted relative to that. */
1679 #define BRANCH_COST 1
1681 /* Add any extra modes needed to represent the condition code. */
1682 #define EXTRA_CC_MODES \
1683 CC (CCZmode, "CCZ") \
1684 CC (CCAmode, "CCA") \
1685 CC (CCUmode, "CCU") \
1686 CC (CCSmode, "CCS") \
1689 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
1690 return the mode to be used for the comparison. */
1692 #define SELECT_CC_MODE(OP, X, Y) \
1693 ( (OP) == EQ || (OP) == NE ? CCZmode \
1694 : (OP) == LE || (OP) == LT || \
1695 (OP) == GE || (OP) == GT ? CCSmode \
1696 : (OP) == LEU || (OP) == LTU || \
1697 (OP) == GEU || (OP) == GTU ? CCUmode \
1701 /* Define the information needed to generate branch and scc insns. This is
1702 stored from the compare operation. Note that we can't use "rtx" here
1703 since it hasn't been defined! */
1705 extern struct rtx_def *s390_compare_op0, *s390_compare_op1;
1708 /* How to refer to registers in assembler output. This sequence is
1709 indexed by compiler's hard-register-number (see above). */
1711 #define REGISTER_NAMES \
1712 { "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", \
1713 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", \
1714 "%f0", "%f2", "%f4", "%f6", "%f1", "%f3", "%f5", "%f7", \
1715 "%f8", "%f10", "%f12", "%f14", "%f9", "%f11", "%f13", "%f15", \
1719 /* implicit call of memcpy, not bcopy */
1721 #define TARGET_MEM_FUNCTIONS
1723 /* Print operand X (an rtx) in assembler syntax to file FILE.
1724 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
1725 For `%' followed by punctuation, CODE is the punctuation and X is null. */
1727 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
1729 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
1732 /* Define the codes that are matched by predicates in aux-output.c. */
1734 #define PREDICATE_CODES \
1735 {"s_operand", { MEM }}, \
1736 {"bras_sym_operand",{ SYMBOL_REF, CONST }}, \
1737 {"r_or_s_operand", { MEM, SUBREG, REG }}, \
1738 {"r_or_im8_operand", { CONST_INT, SUBREG, REG }}, \
1739 {"r_or_s_or_im8_operand", { MEM, SUBREG, REG, CONST_INT }}, \
1740 {"r_or_x_or_im16_operand", { MEM, SUBREG, REG, CONST_INT }}, \
1741 {"const0_operand", { CONST_INT, CONST_DOUBLE }}, \
1742 {"const1_operand", { CONST_INT, CONST_DOUBLE }}, \
1743 {"tmxx_operand", { CONST_INT, MEM }},
1746 /* Constant Pool for all symbols operands which are changed with
1747 force_const_mem during insn generation (expand_insn). */
1749 extern struct rtx_def *s390_pool_start_insn;
1750 extern int s390_pool_count;
1751 extern int s390_nr_constants;
1753 /* Function is splitted in chunk, if literal pool could overflow
1754 Value need to be lowered, if problems with displacement overflow. */
1756 #define S390_REL_MAX 55000
1757 #define S390_CHUNK_MAX 0x2000
1758 #define S390_CHUNK_OV 0x8000
1759 #define S390_POOL_MAX 0xe00
1761 #define ASM_OUTPUT_POOL_PROLOGUE(FILE, FUNNAME, fndecl, size) \
1763 register rtx insn; \
1764 struct pool_constant *pool; \
1766 if (s390_pool_count == -1) \
1768 s390_nr_constants = 0; \
1769 for (pool = first_pool; pool; pool = pool->next) \
1770 if (pool->mark) s390_nr_constants++; \
1773 if (first_pool == 0) { \
1774 s390_asm_output_pool_prologue (FILE, FUNNAME, fndecl, size); \
1777 for (pool = first_pool; pool; pool = pool->next) \
1780 insn = s390_pool_start_insn; \
1782 if (insn==NULL_RTX) \
1783 insn = get_insns (); \
1785 insn = NEXT_INSN (insn); \
1786 for (; insn; insn = NEXT_INSN (insn)) { \
1787 if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') { \
1788 if (s390_stop_dump_lit_p (insn)) { \
1789 mark_constants (PATTERN (insn)); \
1792 mark_constants (PATTERN (insn)); \
1796 /* Mark entries referenced by other entries */ \
1797 for (pool = first_pool; pool; pool = pool->next) \
1799 mark_constants (pool->constant); \
1801 s390_asm_output_pool_prologue (FILE, FUNNAME, fndecl, size); \
1804 /* We need to return, because otherwise the pool is deleted of the
1805 constant pool after the first output. */
1807 #define ASM_OUTPUT_POOL_EPILOGUE(FILE, FUNNAME, fndecl, size) return;
1809 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, EXP, MODE, ALIGN, LABELNO, WIN) \
1811 if ((s390_pool_count == 0) || (s390_pool_count > 0 && LABELNO >= 0)) \
1813 fprintf (FILE, ".LC%d:\n", LABELNO); \
1814 LABELNO = ~LABELNO; \
1816 if (s390_pool_count > 0) \
1818 fprintf (FILE, ".LC%d_%X:\n", ~LABELNO, s390_pool_count); \
1821 /* Output the value of the constant itself. */ \
1822 switch (GET_MODE_CLASS (MODE)) \
1825 if (GET_CODE (EXP) != CONST_DOUBLE) \
1828 memcpy ((char *) &u, (char *) &CONST_DOUBLE_LOW (EXP), sizeof u); \
1829 assemble_real (u.d, MODE, ALIGN); \
1833 case MODE_PARTIAL_INT: \
1835 && (GET_CODE (EXP) == CONST \
1836 || GET_CODE (EXP) == SYMBOL_REF \
1837 || GET_CODE (EXP) == LABEL_REF )) \
1839 fprintf (FILE, "%s\t",TARGET_64BIT ? ASM_QUAD : ASM_LONG); \
1840 s390_output_symbolic_const (FILE, EXP); \
1841 fputc ('\n', (FILE)); \
1844 assemble_integer (EXP, GET_MODE_SIZE (MODE), ALIGN, 1); \
OSDN Git Service
