2 * ARMv4 code generator for TCC
4 * Copyright (c) 2003 Daniel Glöckner
5 * Copyright (c) 2012 Thomas Preud'homme
7 * Based on i386-gen.c by Fabrice Bellard
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #ifdef TARGET_DEFS_ONLY
27 #ifndef TCC_ARM_VFP /* Avoid useless warning */
32 /* number of available registers */
39 #ifndef TCC_ARM_VERSION
40 # define TCC_ARM_VERSION 5
43 /* a register can belong to several classes. The classes must be
44 sorted from more general to more precise (see gv2() code which does
45 assumptions on it). */
46 #define RC_INT 0x0001 /* generic integer register */
47 #define RC_FLOAT 0x0002 /* generic float register */
63 #define RC_IRET RC_R0 /* function return: integer register */
64 #define RC_LRET RC_R1 /* function return: second integer register */
65 #define RC_FRET RC_F0 /* function return: float register */
67 /* pretty names for the registers */
87 #define T2CPR(t) (((t) & VT_BTYPE) != VT_FLOAT ? 0x100 : 0)
90 /* return registers for function */
91 #define REG_IRET TREG_R0 /* single word int return register */
92 #define REG_LRET TREG_R1 /* second word return register (for long long) */
93 #define REG_FRET TREG_F0 /* float return register */
96 #define TOK___divdi3 TOK___aeabi_ldivmod
97 #define TOK___moddi3 TOK___aeabi_ldivmod
98 #define TOK___udivdi3 TOK___aeabi_uldivmod
99 #define TOK___umoddi3 TOK___aeabi_uldivmod
102 /* defined if function parameters must be evaluated in reverse order */
103 #define INVERT_FUNC_PARAMS
105 /* defined if structures are passed as pointers. Otherwise structures
106 are directly pushed on stack. */
107 /* #define FUNC_STRUCT_PARAM_AS_PTR */
109 /* pointer size, in bytes */
112 /* long double size and alignment, in bytes */
114 #define LDOUBLE_SIZE 8
118 #define LDOUBLE_SIZE 8
122 #define LDOUBLE_ALIGN 8
124 #define LDOUBLE_ALIGN 4
127 /* maximum alignment (for aligned attribute support) */
130 #define CHAR_IS_UNSIGNED
132 /******************************************************/
135 #define EM_TCC_TARGET EM_ARM
137 /* relocation type for 32 bit data relocation */
138 #define R_DATA_32 R_ARM_ABS32
139 #define R_DATA_PTR R_ARM_ABS32
140 #define R_JMP_SLOT R_ARM_JUMP_SLOT
141 #define R_COPY R_ARM_COPY
143 #define ELF_START_ADDR 0x00008000
144 #define ELF_PAGE_SIZE 0x1000
146 /******************************************************/
147 #else /* ! TARGET_DEFS_ONLY */
148 /******************************************************/
151 ST_DATA
const int reg_classes
[NB_REGS
] = {
152 /* r0 */ RC_INT
| RC_R0
,
153 /* r1 */ RC_INT
| RC_R1
,
154 /* r2 */ RC_INT
| RC_R2
,
155 /* r3 */ RC_INT
| RC_R3
,
156 /* r12 */ RC_INT
| RC_R12
,
157 /* f0 */ RC_FLOAT
| RC_F0
,
158 /* f1 */ RC_FLOAT
| RC_F1
,
159 /* f2 */ RC_FLOAT
| RC_F2
,
160 /* f3 */ RC_FLOAT
| RC_F3
,
162 /* d4/s8 */ RC_FLOAT
| RC_F4
,
163 /* d5/s10 */ RC_FLOAT
| RC_F5
,
164 /* d6/s12 */ RC_FLOAT
| RC_F6
,
165 /* d7/s14 */ RC_FLOAT
| RC_F7
,
169 static int func_sub_sp_offset
, last_itod_magic
;
172 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
173 static CType float_type
, double_type
, func_float_type
, func_double_type
;
174 ST_FUNC
void arm_init_types(void)
176 float_type
.t
= VT_FLOAT
;
177 double_type
.t
= VT_DOUBLE
;
178 func_float_type
.t
= VT_FUNC
;
179 func_float_type
.ref
= sym_push(SYM_FIELD
, &float_type
, FUNC_CDECL
, FUNC_OLD
);
180 func_double_type
.t
= VT_FUNC
;
181 func_double_type
.ref
= sym_push(SYM_FIELD
, &double_type
, FUNC_CDECL
, FUNC_OLD
);
184 #define func_float_type func_old_type
185 #define func_double_type func_old_type
186 #define func_ldouble_type func_old_type
187 ST_FUNC
void arm_init_types(void) {}
190 static int two2mask(int a
,int b
) {
191 return (reg_classes
[a
]|reg_classes
[b
])&~(RC_INT
|RC_FLOAT
);
194 static int regmask(int r
) {
195 return reg_classes
[r
]&~(RC_INT
|RC_FLOAT
);
198 /******************************************************/
202 /* this is a good place to start adding big-endian support*/
206 if (!cur_text_section
)
207 tcc_error("compiler error! This happens f.ex. if the compiler\n"
208 "can't evaluate constant expressions outside of a function.");
209 if (ind1
> cur_text_section
->data_allocated
)
210 section_realloc(cur_text_section
, ind1
);
211 cur_text_section
->data
[ind
++] = i
&255;
213 cur_text_section
->data
[ind
++] = i
&255;
215 cur_text_section
->data
[ind
++] = i
&255;
217 cur_text_section
->data
[ind
++] = i
;
220 static uint32_t stuff_const(uint32_t op
, uint32_t c
)
223 uint32_t nc
= 0, negop
= 0;
233 case 0x1A00000: //mov
234 case 0x1E00000: //mvn
241 return (op
&0xF010F000)|((op
>>16)&0xF)|0x1E00000;
245 return (op
&0xF010F000)|((op
>>16)&0xF)|0x1A00000;
246 case 0x1C00000: //bic
251 case 0x1800000: //orr
253 return (op
&0xFFF0FFFF)|0x1E00000;
259 if(c
<256) /* catch undefined <<32 */
262 m
=(0xff>>i
)|(0xff<<(32-i
));
264 return op
|(i
<<7)|(c
<<i
)|(c
>>(32-i
));
274 void stuff_const_harder(uint32_t op
, uint32_t v
) {
280 uint32_t a
[16], nv
, no
, o2
, n2
;
283 o2
=(op
&0xfff0ffff)|((op
&0xf000)<<4);;
285 a
[i
]=(a
[i
-1]>>2)|(a
[i
-1]<<30);
287 for(j
=i
<4?i
+12:15;j
>=i
+4;j
--)
288 if((v
&(a
[i
]|a
[j
]))==v
) {
289 o(stuff_const(op
,v
&a
[i
]));
290 o(stuff_const(o2
,v
&a
[j
]));
297 for(j
=i
<4?i
+12:15;j
>=i
+4;j
--)
298 if((nv
&(a
[i
]|a
[j
]))==nv
) {
299 o(stuff_const(no
,nv
&a
[i
]));
300 o(stuff_const(n2
,nv
&a
[j
]));
305 for(k
=i
<4?i
+12:15;k
>=j
+4;k
--)
306 if((v
&(a
[i
]|a
[j
]|a
[k
]))==v
) {
307 o(stuff_const(op
,v
&a
[i
]));
308 o(stuff_const(o2
,v
&a
[j
]));
309 o(stuff_const(o2
,v
&a
[k
]));
316 for(k
=i
<4?i
+12:15;k
>=j
+4;k
--)
317 if((nv
&(a
[i
]|a
[j
]|a
[k
]))==nv
) {
318 o(stuff_const(no
,nv
&a
[i
]));
319 o(stuff_const(n2
,nv
&a
[j
]));
320 o(stuff_const(n2
,nv
&a
[k
]));
323 o(stuff_const(op
,v
&a
[0]));
324 o(stuff_const(o2
,v
&a
[4]));
325 o(stuff_const(o2
,v
&a
[8]));
326 o(stuff_const(o2
,v
&a
[12]));
330 ST_FUNC
uint32_t encbranch(int pos
, int addr
, int fail
)
334 if(addr
>=0x1000000 || addr
<-0x1000000) {
336 tcc_error("FIXME: function bigger than 32MB");
339 return 0x0A000000|(addr
&0xffffff);
342 int decbranch(int pos
)
345 x
=*(uint32_t *)(cur_text_section
->data
+ pos
);
352 /* output a symbol and patch all calls to it */
353 void gsym_addr(int t
, int a
)
358 x
=(uint32_t *)(cur_text_section
->data
+ t
);
361 *x
=0xE1A00000; // nop
364 *x
|= encbranch(lt
,a
,1);
375 static uint32_t vfpr(int r
)
377 if(r
<TREG_F0
|| r
>TREG_F7
)
378 tcc_error("compiler error! register %i is no vfp register",r
);
382 static uint32_t fpr(int r
)
384 if(r
<TREG_F0
|| r
>TREG_F3
)
385 tcc_error("compiler error! register %i is no fpa register",r
);
390 static uint32_t intr(int r
)
394 if((r
<0 || r
>4) && r
!=14)
395 tcc_error("compiler error! register %i is no int register",r
);
399 static void calcaddr(uint32_t *base
, int *off
, int *sgn
, int maxoff
, unsigned shift
)
401 if(*off
>maxoff
|| *off
&((1<<shift
)-1)) {
408 y
=stuff_const(x
,*off
&~maxoff
);
414 y
=stuff_const(x
,(*off
+maxoff
)&~maxoff
);
418 *off
=((*off
+maxoff
)&~maxoff
)-*off
;
421 stuff_const_harder(x
,*off
&~maxoff
);
426 static uint32_t mapcc(int cc
)
431 return 0x30000000; /* CC/LO */
433 return 0x20000000; /* CS/HS */
435 return 0x00000000; /* EQ */
437 return 0x10000000; /* NE */
439 return 0x90000000; /* LS */
441 return 0x80000000; /* HI */
443 return 0x40000000; /* MI */
445 return 0x50000000; /* PL */
447 return 0xB0000000; /* LT */
449 return 0xA0000000; /* GE */
451 return 0xD0000000; /* LE */
453 return 0xC0000000; /* GT */
455 tcc_error("unexpected condition code");
456 return 0xE0000000; /* AL */
459 static int negcc(int cc
)
488 tcc_error("unexpected condition code");
492 /* load 'r' from value 'sv' */
493 void load(int r
, SValue
*sv
)
495 int v
, ft
, fc
, fr
, sign
;
512 uint32_t base
= 0xB; // fp
515 v1
.r
= VT_LOCAL
| VT_LVAL
;
517 load(base
=14 /* lr */, &v1
);
520 } else if(v
== VT_CONST
) {
528 } else if(v
< VT_CONST
) {
535 calcaddr(&base
,&fc
,&sign
,1020,2);
537 op
=0xED100A00; /* flds */
540 if ((ft
& VT_BTYPE
) != VT_FLOAT
)
541 op
|=0x100; /* flds -> fldd */
542 o(op
|(vfpr(r
)<<12)|(fc
>>2)|(base
<<16));
547 #if LDOUBLE_SIZE == 8
548 if ((ft
& VT_BTYPE
) != VT_FLOAT
)
551 if ((ft
& VT_BTYPE
) == VT_DOUBLE
)
553 else if ((ft
& VT_BTYPE
) == VT_LDOUBLE
)
556 o(op
|(fpr(r
)<<12)|(fc
>>2)|(base
<<16));
558 } else if((ft
& (VT_BTYPE
|VT_UNSIGNED
)) == VT_BYTE
559 || (ft
& VT_BTYPE
) == VT_SHORT
) {
560 calcaddr(&base
,&fc
,&sign
,255,0);
562 if ((ft
& VT_BTYPE
) == VT_SHORT
)
564 if ((ft
& VT_UNSIGNED
) == 0)
568 o(op
|(intr(r
)<<12)|(base
<<16)|((fc
&0xf0)<<4)|(fc
&0xf));
570 calcaddr(&base
,&fc
,&sign
,4095,0);
574 if ((ft
& VT_BTYPE
) == VT_BYTE
|| (ft
& VT_BTYPE
) == VT_BOOL
)
576 o(op
|(intr(r
)<<12)|fc
|(base
<<16));
582 op
=stuff_const(0xE3A00000|(intr(r
)<<12),sv
->c
.ul
);
583 if (fr
& VT_SYM
|| !op
) {
584 o(0xE59F0000|(intr(r
)<<12));
587 greloc(cur_text_section
, sv
->sym
, ind
, R_ARM_ABS32
);
592 } else if (v
== VT_LOCAL
) {
593 op
=stuff_const(0xE28B0000|(intr(r
)<<12),sv
->c
.ul
);
594 if (fr
& VT_SYM
|| !op
) {
595 o(0xE59F0000|(intr(r
)<<12));
597 if(fr
& VT_SYM
) // needed ?
598 greloc(cur_text_section
, sv
->sym
, ind
, R_ARM_ABS32
);
600 o(0xE08B0000|(intr(r
)<<12)|intr(r
));
604 } else if(v
== VT_CMP
) {
605 o(mapcc(sv
->c
.ul
)|0x3A00001|(intr(r
)<<12));
606 o(mapcc(negcc(sv
->c
.ul
))|0x3A00000|(intr(r
)<<12));
608 } else if (v
== VT_JMP
|| v
== VT_JMPI
) {
611 o(0xE3A00000|(intr(r
)<<12)|t
);
614 o(0xE3A00000|(intr(r
)<<12)|(t
^1));
616 } else if (v
< VT_CONST
) {
619 o(0xEEB00A40|(vfpr(r
)<<12)|vfpr(v
)|T2CPR(ft
)); /* fcpyX */
621 o(0xEE008180|(fpr(r
)<<12)|fpr(v
));
624 o(0xE1A00000|(intr(r
)<<12)|intr(v
));
628 tcc_error("load unimplemented!");
631 /* store register 'r' in lvalue 'v' */
632 void store(int r
, SValue
*sv
)
635 int v
, ft
, fc
, fr
, sign
;
650 if (fr
& VT_LVAL
|| fr
== VT_LOCAL
) {
656 } else if(v
== VT_CONST
) {
667 calcaddr(&base
,&fc
,&sign
,1020,2);
669 op
=0xED000A00; /* fsts */
672 if ((ft
& VT_BTYPE
) != VT_FLOAT
)
673 op
|=0x100; /* fsts -> fstd */
674 o(op
|(vfpr(r
)<<12)|(fc
>>2)|(base
<<16));
679 #if LDOUBLE_SIZE == 8
680 if ((ft
& VT_BTYPE
) != VT_FLOAT
)
683 if ((ft
& VT_BTYPE
) == VT_DOUBLE
)
685 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
)
688 o(op
|(fpr(r
)<<12)|(fc
>>2)|(base
<<16));
691 } else if((ft
& VT_BTYPE
) == VT_SHORT
) {
692 calcaddr(&base
,&fc
,&sign
,255,0);
696 o(op
|(intr(r
)<<12)|(base
<<16)|((fc
&0xf0)<<4)|(fc
&0xf));
698 calcaddr(&base
,&fc
,&sign
,4095,0);
702 if ((ft
& VT_BTYPE
) == VT_BYTE
|| (ft
& VT_BTYPE
) == VT_BOOL
)
704 o(op
|(intr(r
)<<12)|fc
|(base
<<16));
709 tcc_error("store unimplemented");
712 static void gadd_sp(int val
)
714 stuff_const_harder(0xE28DD000,val
);
717 /* 'is_jmp' is '1' if it is a jump */
718 static void gcall_or_jmp(int is_jmp
)
721 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
724 x
=encbranch(ind
,ind
+vtop
->c
.ul
,0);
726 if (vtop
->r
& VT_SYM
) {
727 /* relocation case */
728 greloc(cur_text_section
, vtop
->sym
, ind
, R_ARM_PC24
);
730 put_elf_reloc(symtab_section
, cur_text_section
, ind
, R_ARM_PC24
, 0);
731 o(x
|(is_jmp
?0xE0000000:0xE1000000));
734 o(0xE28FE004); // add lr,pc,#4
735 o(0xE51FF004); // ldr pc,[pc,#-4]
736 if (vtop
->r
& VT_SYM
)
737 greloc(cur_text_section
, vtop
->sym
, ind
, R_ARM_ABS32
);
741 /* otherwise, indirect call */
744 o(0xE1A0E00F); // mov lr,pc
745 o(0xE1A0F000|intr(r
)); // mov pc,r
749 #ifdef TCC_ARM_HARDFLOAT
750 /* Return whether a structure is an homogeneous float aggregate or not.
751 The answer is true if all the elements of the structure are of the same
752 primitive float type and there is less than 4 elements.
754 type: the type corresponding to the structure to be tested */
755 static int is_hgen_float_aggr(CType
*type
)
757 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
759 int btype
, nb_fields
= 0;
761 ref
= type
->ref
->next
;
762 btype
= ref
->type
.t
& VT_BTYPE
;
763 if (btype
== VT_FLOAT
|| btype
== VT_DOUBLE
) {
764 for(; ref
&& btype
== (ref
->type
.t
& VT_BTYPE
); ref
= ref
->next
, nb_fields
++);
765 return !ref
&& nb_fields
<= 4;
772 signed char avail
[3]; /* 3 holes max with only float and double alignments */
773 int first_hole
; /* first available hole */
774 int last_hole
; /* last available hole (none if equal to first_hole) */
775 int first_free_reg
; /* next free register in the sequence, hole excluded */
778 #define AVAIL_REGS_INITIALIZER (struct avail_regs) { { 0, 0, 0}, 0, 0, 0 }
780 /* Find suitable registers for a VFP Co-Processor Register Candidate (VFP CPRC
781 param) according to the rules described in the procedure call standard for
782 the ARM architecture (AAPCS). If found, the registers are assigned to this
783 VFP CPRC parameter. Registers are allocated in sequence unless a hole exists
784 and the parameter is a single float.
786 avregs: opaque structure to keep track of available VFP co-processor regs
787 align: alignment contraints for the param, as returned by type_size()
788 size: size of the parameter, as returned by type_size() */
789 int assign_vfpreg(struct avail_regs
*avregs
, int align
, int size
)
793 if (avregs
->first_free_reg
== -1)
795 if (align
>> 3) { /* double alignment */
796 first_reg
= avregs
->first_free_reg
;
797 /* alignment contraint not respected so use next reg and record hole */
799 avregs
->avail
[avregs
->last_hole
++] = first_reg
++;
800 } else { /* no special alignment (float or array of float) */
801 /* if single float and a hole is available, assign the param to it */
802 if (size
== 4 && avregs
->first_hole
!= avregs
->last_hole
)
803 return avregs
->avail
[avregs
->first_hole
++];
805 first_reg
= avregs
->first_free_reg
;
807 if (first_reg
+ size
/ 4 <= 16) {
808 avregs
->first_free_reg
= first_reg
+ size
/ 4;
811 avregs
->first_free_reg
= -1;
816 /* Return the number of registers needed to return the struct, or 0 if
817 returning via struct pointer. */
818 ST_FUNC
int gfunc_sret(CType
*vt
, CType
*ret
, int *ret_align
) {
821 size
= type_size(vt
, &align
);
822 #ifdef TCC_ARM_HARDFLOAT
823 if (is_float(vt
->t
) || is_hgen_float_aggr(vt
)) {
827 return (size
+ 7) >> 3;
843 /* Parameters are classified according to how they are copied to their final
844 destination for the function call. Because the copying is performed class
845 after class according to the order in the union below, it is important that
846 some constraints about the order of the members of this union are respected:
847 - CORE_STRUCT_CLASS must come after STACK_CLASS;
848 - CORE_CLASS must come after STACK_CLASS, CORE_STRUCT_CLASS and
850 - VFP_STRUCT_CLASS must come after VFP_CLASS.
851 See the comment for the main loop in copy_params() for the reason. */
862 int start
; /* first reg or addr used depending on the class */
863 int end
; /* last reg used or next free addr depending on the class */
864 SValue
*sval
; /* pointer to SValue on the value stack */
865 struct param_plan
*prev
; /* previous element in this class */
869 struct param_plan
*pplans
; /* array of all the param plans */
870 struct param_plan
*clsplans
[NB_CLASSES
]; /* per class lists of param plans */
873 #define add_param_plan(plan,pplan,class) \
875 pplan.prev = plan->clsplans[class]; \
876 plan->pplans[plan ## _nb] = pplan; \
877 plan->clsplans[class] = &plan->pplans[plan ## _nb++]; \
880 /* Assign parameters to registers and stack with alignment according to the
881 rules in the procedure call standard for the ARM architecture (AAPCS).
882 The overall assignment is recorded in an array of per parameter structures
883 called parameter plans. The parameter plans are also further organized in a
884 number of linked lists, one per class of parameter (see the comment for the
885 definition of union reg_class).
887 nb_args: number of parameters of the function for which a call is generated
888 variadic: whether the function is a variadic function or not
889 plan: the structure where the overall assignment is recorded
890 todo: a bitmap that record which core registers hold a parameter
892 Returns the amount of stack space needed for parameter passing
894 Note: this function allocated an array in plan->pplans with tcc_malloc. It
895 is the responsability of the caller to free this array once used (ie not
896 before copy_params). */
897 static int assign_regs(int nb_args
, int variadic
, struct plan
*plan
, int *todo
)
900 int ncrn
/* next core register number */, nsaa
/* next stacked argument address*/;
902 struct param_plan pplan
;
903 #ifdef TCC_ARM_HARDFLOAT
904 struct avail_regs avregs
= AVAIL_REGS_INITIALIZER
;
909 plan
->pplans
= tcc_malloc(nb_args
* sizeof(*plan
->pplans
));
910 memset(plan
->clsplans
, 0, sizeof(plan
->clsplans
));
911 for(i
= nb_args
; i
-- ;) {
912 int j
, start_vfpreg
= 0;
913 size
= type_size(&vtop
[-i
].type
, &align
);
914 switch(vtop
[-i
].type
.t
& VT_BTYPE
) {
919 #ifdef TCC_ARM_HARDFLOAT
921 int is_hfa
= 0; /* Homogeneous float aggregate */
923 if (is_float(vtop
[-i
].type
.t
)
924 || (is_hfa
= is_hgen_float_aggr(&vtop
[-i
].type
))) {
927 start_vfpreg
= assign_vfpreg(&avregs
, align
, size
);
928 end_vfpreg
= start_vfpreg
+ ((size
- 1) >> 2);
929 if (start_vfpreg
>= 0) {
930 pplan
= (struct param_plan
) {start_vfpreg
, end_vfpreg
, &vtop
[-i
]};
932 add_param_plan(plan
, pplan
, VFP_STRUCT_CLASS
);
934 add_param_plan(plan
, pplan
, VFP_CLASS
);
941 ncrn
= (ncrn
+ (align
-1)/4) & -(align
/4);
942 size
= (size
+ 3) & -4;
943 if (ncrn
+ size
/4 <= 4 || (ncrn
< 4 && start_vfpreg
!= -1)) {
944 /* The parameter is allocated both in core register and on stack. As
945 * such, it can be of either class: it would either be the last of
946 * CORE_STRUCT_CLASS or the first of STACK_CLASS. */
947 for (j
= ncrn
; j
< 4 && j
< ncrn
+ size
/ 4; j
++)
949 pplan
= (struct param_plan
) {ncrn
, j
, &vtop
[-i
]};
950 add_param_plan(plan
, pplan
, CORE_STRUCT_CLASS
);
953 nsaa
= (ncrn
- 4) * 4;
961 int is_long
= (vtop
[-i
].type
.t
& VT_BTYPE
) == VT_LLONG
;
964 ncrn
= (ncrn
+ 1) & -2;
968 pplan
= (struct param_plan
) {ncrn
, ncrn
, &vtop
[-i
]};
972 add_param_plan(plan
, pplan
, CORE_CLASS
);
976 nsaa
= (nsaa
+ (align
- 1)) & ~(align
- 1);
977 pplan
= (struct param_plan
) {nsaa
, nsaa
+ size
, &vtop
[-i
]};
978 add_param_plan(plan
, pplan
, STACK_CLASS
);
979 nsaa
+= size
; /* size already rounded up before */
984 #undef add_param_plan
986 /* Copy parameters to their final destination (core reg, VFP reg or stack) for
989 nb_args: number of parameters the function take
990 plan: the overall assignment plan for parameters
991 todo: a bitmap indicating what core reg will hold a parameter
993 Returns the number of SValue added by this function on the value stack */
994 static int copy_params(int nb_args
, struct plan
*plan
, int todo
)
996 int size
, align
, r
, i
, nb_extra_sval
= 0;
997 struct param_plan
*pplan
;
999 /* Several constraints require parameters to be copied in a specific order:
1000 - structures are copied to the stack before being loaded in a reg;
1001 - floats loaded to an odd numbered VFP reg are first copied to the
1002 preceding even numbered VFP reg and then moved to the next VFP reg.
1004 It is thus important that:
1005 - structures assigned to core regs must be copied after parameters
1006 assigned to the stack but before structures assigned to VFP regs because
1007 a structure can lie partly in core registers and partly on the stack;
1008 - parameters assigned to the stack and all structures be copied before
1009 parameters assigned to a core reg since copying a parameter to the stack
1010 require using a core reg;
1011 - parameters assigned to VFP regs be copied before structures assigned to
1012 VFP regs as the copy might use an even numbered VFP reg that already
1013 holds part of a structure. */
1014 for(i
= 0; i
< NB_CLASSES
; i
++) {
1015 for(pplan
= plan
->clsplans
[i
]; pplan
; pplan
= pplan
->prev
) {
1016 vpushv(pplan
->sval
);
1017 pplan
->sval
->r
= pplan
->sval
->r2
= VT_CONST
; /* disable entry */
1020 case CORE_STRUCT_CLASS
:
1021 case VFP_STRUCT_CLASS
:
1022 if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
1024 size
= type_size(&pplan
->sval
->type
, &align
);
1025 /* align to stack align size */
1026 size
= (size
+ 3) & ~3;
1027 if (i
== STACK_CLASS
&& pplan
->prev
)
1028 padding
= pplan
->start
- pplan
->prev
->end
;
1029 size
+= padding
; /* Add padding if any */
1030 /* allocate the necessary size on stack */
1032 /* generate structure store */
1033 r
= get_reg(RC_INT
);
1034 o(0xE28D0000|(intr(r
)<<12)|padding
); /* add r, sp, padding */
1035 vset(&vtop
->type
, r
| VT_LVAL
, 0);
1037 vstore(); /* memcpy to current sp + potential padding */
1039 /* Homogeneous float aggregate are loaded to VFP registers
1040 immediately since there is no way of loading data in multiple
1041 non consecutive VFP registers as what is done for other
1042 structures (see the use of todo). */
1043 if (i
== VFP_STRUCT_CLASS
) {
1044 int first
= pplan
->start
, nb
= pplan
->end
- first
+ 1;
1045 /* vpop.32 {pplan->start, ..., pplan->end} */
1046 o(0xECBD0A00|(first
&1)<<22|(first
>>1)<<12|nb
);
1047 /* No need to write the register used to a SValue since VFP regs
1048 cannot be used for gcall_or_jmp */
1051 if (is_float(pplan
->sval
->type
.t
)) {
1053 r
= vfpr(gv(RC_FLOAT
)) << 12;
1054 if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_FLOAT
)
1058 r
|= 0x101; /* vpush.32 -> vpush.64 */
1060 o(0xED2D0A01 + r
); /* vpush */
1062 r
= fpr(gv(RC_FLOAT
)) << 12;
1063 if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_FLOAT
)
1065 else if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
1068 size
= LDOUBLE_SIZE
;
1075 o(0xED2D0100|r
|(size
>>2)); /* some kind of vpush for FPA */
1078 /* simple type (currently always same size) */
1079 /* XXX: implicit cast ? */
1081 if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
1085 o(0xE52D0004|(intr(r
)<<12)); /* push r */
1089 o(0xE52D0004|(intr(r
)<<12)); /* push r */
1091 if (i
== STACK_CLASS
&& pplan
->prev
)
1092 gadd_sp(pplan
->prev
->end
- pplan
->start
); /* Add padding if any */
1097 gv(regmask(TREG_F0
+ (pplan
->start
>> 1)));
1098 if (pplan
->start
& 1) { /* Must be in upper part of double register */
1099 o(0xEEF00A40|((pplan
->start
>>1)<<12)|(pplan
->start
>>1)); /* vmov.f32 s(n+1), sn */
1100 vtop
->r
= VT_CONST
; /* avoid being saved on stack by gv for next float */
1105 if ((pplan
->sval
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
1107 gv(regmask(pplan
->end
));
1108 pplan
->sval
->r2
= vtop
->r
;
1111 gv(regmask(pplan
->start
));
1112 /* Mark register as used so that gcall_or_jmp use another one
1113 (regs >=4 are free as never used to pass parameters) */
1114 pplan
->sval
->r
= vtop
->r
;
1121 /* Manually free remaining registers since next parameters are loaded
1122 * manually, without the help of gv(int). */
1126 o(0xE8BD0000|todo
); /* pop {todo} */
1127 for(pplan
= plan
->clsplans
[CORE_STRUCT_CLASS
]; pplan
; pplan
= pplan
->prev
) {
1129 pplan
->sval
->r
= pplan
->start
;
1130 /* An SValue can only pin 2 registers at best (r and r2) but a structure
1131 can occupy more than 2 registers. Thus, we need to push on the value
1132 stack some fake parameter to have on SValue for each registers used
1133 by a structure (r2 is not used). */
1134 for (r
= pplan
->start
+ 1; r
<= pplan
->end
; r
++) {
1135 if (todo
& (1 << r
)) {
1143 return nb_extra_sval
;
1146 /* Generate function call. The function address is pushed first, then
1147 all the parameters in call order. This functions pops all the
1148 parameters and the function address. */
1149 void gfunc_call(int nb_args
)
1156 variadic
= (vtop
[-nb_args
].type
.ref
->c
== FUNC_ELLIPSIS
);
1157 /* cannot let cpu flags if other instruction are generated. Also avoid leaving
1158 VT_JMP anywhere except on the top of the stack because it would complicate
1159 the code generator. */
1160 r
= vtop
->r
& VT_VALMASK
;
1161 if (r
== VT_CMP
|| (r
& ~1) == VT_JMP
)
1164 args_size
= assign_regs(nb_args
, variadic
, &plan
, &todo
);
1167 if (args_size
& 7) { /* Stack must be 8 byte aligned at fct call for EABI */
1168 args_size
= (args_size
+ 7) & ~7;
1169 o(0xE24DD004); /* sub sp, sp, #4 */
1173 nb_args
+= copy_params(nb_args
, &plan
, todo
);
1174 tcc_free(plan
.pplans
);
1176 /* Move fct SValue on top as required by gcall_or_jmp */
1180 gadd_sp(args_size
); /* pop all parameters passed on the stack */
1183 #ifdef TCC_ARM_HARDFLOAT
1184 if(variadic
&& is_float(vtop
->type
.ref
->type
.t
)) {
1186 rf(is_float(vtop
->type
.ref
->type
.t
)) {
1188 if((vtop
->type
.ref
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
1189 o(0xEE000A10); /*vmov s0, r0 */
1191 o(0xEE000B10); /* vmov.32 d0[0], r0 */
1192 o(0xEE201B10); /* vmov.32 d0[1], r1 */
1197 vtop
-= nb_args
+ 1; /* Pop all params and fct address from value stack */
1198 leaffunc
= 0; /* we are calling a function, so we aren't in a leaf function */
1201 /* generate function prolog of type 't' */
1202 void gfunc_prolog(CType
*func_type
)
1205 int n
,nf
,size
,align
, variadic
, struct_ret
= 0;
1206 #ifdef TCC_ARM_HARDFLOAT
1207 struct avail_regs avregs
= AVAIL_REGS_INITIALIZER
;
1210 sym
= func_type
->ref
;
1211 func_vt
= sym
->type
;
1214 variadic
= (func_type
->ref
->c
== FUNC_ELLIPSIS
);
1215 if((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
1216 #ifdef TCC_ARM_HARDFLOAT
1217 && (variadic
|| !is_hgen_float_aggr(&func_vt
))
1219 && type_size(&func_vt
,&align
) > 4)
1223 func_vc
= 12; /* Offset from fp of the place to store the result */
1225 for(sym2
=sym
->next
;sym2
&& (n
<4 || nf
<16);sym2
=sym2
->next
) {
1226 size
= type_size(&sym2
->type
, &align
);
1227 #ifdef TCC_ARM_HARDFLOAT
1228 if (!variadic
&& (is_float(sym2
->type
.t
)
1229 || is_hgen_float_aggr(&sym2
->type
))) {
1230 int tmpnf
= assign_vfpreg(&avregs
, align
, size
);
1231 tmpnf
+= (size
+ 3) / 4;
1232 nf
= (tmpnf
> nf
) ? tmpnf
: nf
;
1236 n
+= (size
+ 3) / 4;
1238 o(0xE1A0C00D); /* mov ip,sp */
1247 o(0xE92D0000|((1<<n
)-1)); /* save r0-r4 on stack if needed */
1252 nf
=(nf
+1)&-2; /* nf => HARDFLOAT => EABI */
1253 o(0xED2D0A00|nf
); /* save s0-s15 on stack if needed */
1255 o(0xE92D5800); /* save fp, ip, lr */
1256 o(0xE1A0B00D); /* mov fp, sp */
1257 func_sub_sp_offset
= ind
;
1258 o(0xE1A00000); /* nop, leave space for stack adjustment in epilogue */
1260 int addr
, pn
= struct_ret
, sn
= 0; /* pn=core, sn=stack */
1262 #ifdef TCC_ARM_HARDFLOAT
1264 avregs
= AVAIL_REGS_INITIALIZER
;
1266 while ((sym
= sym
->next
)) {
1269 size
= type_size(type
, &align
);
1270 size
= (size
+ 3) >> 2;
1271 align
= (align
+ 3) & ~3;
1272 #ifdef TCC_ARM_HARDFLOAT
1273 if (!variadic
&& (is_float(sym
->type
.t
)
1274 || is_hgen_float_aggr(&sym
->type
))) {
1275 int fpn
= assign_vfpreg(&avregs
, align
, size
<< 2);
1284 pn
= (pn
+ (align
-1)/4) & -(align
/4);
1286 addr
= (nf
+ pn
) * 4;
1291 #ifdef TCC_ARM_HARDFLOAT
1295 sn
= (sn
+ (align
-1)/4) & -(align
/4);
1297 addr
= (n
+ nf
+ sn
) * 4;
1300 sym_push(sym
->v
& ~SYM_FIELD
, type
, VT_LOCAL
| lvalue_type(type
->t
), addr
+12);
1308 /* generate function epilog */
1309 void gfunc_epilog(void)
1314 /* Useless but harmless copy of the float result into main register(s) in case
1315 of variadic function in the hardfloat variant */
1316 if(is_float(func_vt
.t
)) {
1317 if((func_vt
.t
& VT_BTYPE
) == VT_FLOAT
)
1318 o(0xEE100A10); /* fmrs r0, s0 */
1320 o(0xEE100B10); /* fmrdl r0, d0 */
1321 o(0xEE301B10); /* fmrdh r1, d0 */
1325 o(0xE89BA800); /* restore fp, sp, pc */
1326 diff
= (-loc
+ 3) & -4;
1329 diff
= ((diff
+ 11) & -8) - 4;
1332 x
=stuff_const(0xE24BD000, diff
); /* sub sp,fp,# */
1334 *(uint32_t *)(cur_text_section
->data
+ func_sub_sp_offset
) = x
;
1338 o(0xE59FC004); /* ldr ip,[pc+4] */
1339 o(0xE04BD00C); /* sub sp,fp,ip */
1340 o(0xE1A0F00E); /* mov pc,lr */
1342 *(uint32_t *)(cur_text_section
->data
+ func_sub_sp_offset
) = 0xE1000000|encbranch(func_sub_sp_offset
,addr
,1);
1347 /* generate a jump to a label */
1352 o(0xE0000000|encbranch(r
,t
,1));
1356 /* generate a jump to a fixed address */
1357 void gjmp_addr(int a
)
1362 /* generate a test. set 'inv' to invert test. Stack entry is popped */
1363 int gtst(int inv
, int t
)
1367 v
= vtop
->r
& VT_VALMASK
;
1370 op
=mapcc(inv
?negcc(vtop
->c
.i
):vtop
->c
.i
);
1371 op
|=encbranch(r
,t
,1);
1374 } else if (v
== VT_JMP
|| v
== VT_JMPI
) {
1375 if ((v
& 1) == inv
) {
1384 p
= decbranch(lp
=p
);
1386 x
= (uint32_t *)(cur_text_section
->data
+ lp
);
1388 *x
|= encbranch(lp
,t
,1);
1397 if (is_float(vtop
->type
.t
)) {
1400 o(0xEEB50A40|(vfpr(r
)<<12)|T2CPR(vtop
->type
.t
)); /* fcmpzX */
1401 o(0xEEF1FA10); /* fmstat */
1403 o(0xEE90F118|(fpr(r
)<<16));
1407 return gtst(inv
, t
);
1408 } else if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1409 /* constant jmp optimization */
1410 if ((vtop
->c
.i
!= 0) != inv
)
1414 o(0xE3300000|(intr(v
)<<16));
1417 return gtst(inv
, t
);
1424 /* generate an integer binary operation */
1425 void gen_opi(int op
)
1428 uint32_t opc
= 0, r
, fr
;
1429 unsigned short retreg
= REG_IRET
;
1437 case TOK_ADDC1
: /* add with carry generation */
1445 case TOK_SUBC1
: /* sub with carry generation */
1449 case TOK_ADDC2
: /* add with carry use */
1453 case TOK_SUBC2
: /* sub with carry use */
1470 gv2(RC_INT
, RC_INT
);
1474 o(0xE0000090|(intr(r
)<<16)|(intr(r
)<<8)|intr(fr
));
1499 func
=TOK___aeabi_idivmod
;
1508 func
=TOK___aeabi_uidivmod
;
1516 gv2(RC_INT
, RC_INT
);
1517 r
=intr(vtop
[-1].r2
=get_reg(RC_INT
));
1519 vtop
[-1].r
=get_reg_ex(RC_INT
,regmask(c
));
1521 o(0xE0800090|(r
<<16)|(intr(vtop
->r
)<<12)|(intr(c
)<<8)|intr(vtop
[1].r
));
1530 if((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1531 if(opc
== 4 || opc
== 5 || opc
== 0xc) {
1533 opc
|=2; // sub -> rsb
1536 if ((vtop
->r
& VT_VALMASK
) == VT_CMP
||
1537 (vtop
->r
& (VT_VALMASK
& ~1)) == VT_JMP
)
1542 opc
=0xE0000000|(opc
<<20)|(c
<<16);
1543 if((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1545 x
=stuff_const(opc
|0x2000000,vtop
->c
.i
);
1547 r
=intr(vtop
[-1].r
=get_reg_ex(RC_INT
,regmask(vtop
[-1].r
)));
1552 fr
=intr(gv(RC_INT
));
1553 r
=intr(vtop
[-1].r
=get_reg_ex(RC_INT
,two2mask(vtop
->r
,vtop
[-1].r
)));
1557 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
1563 opc
=0xE1A00000|(opc
<<5);
1564 if ((vtop
->r
& VT_VALMASK
) == VT_CMP
||
1565 (vtop
->r
& (VT_VALMASK
& ~1)) == VT_JMP
)
1571 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1572 fr
=intr(vtop
[-1].r
=get_reg_ex(RC_INT
,regmask(vtop
[-1].r
)));
1573 c
= vtop
->c
.i
& 0x1f;
1574 o(opc
|(c
<<7)|(fr
<<12));
1576 fr
=intr(gv(RC_INT
));
1577 c
=intr(vtop
[-1].r
=get_reg_ex(RC_INT
,two2mask(vtop
->r
,vtop
[-1].r
)));
1578 o(opc
|(c
<<12)|(fr
<<8)|0x10);
1583 vpush_global_sym(&func_old_type
, func
);
1590 tcc_error("gen_opi %i unimplemented!",op
);
1595 static int is_zero(int i
)
1597 if((vtop
[i
].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1599 if (vtop
[i
].type
.t
== VT_FLOAT
)
1600 return (vtop
[i
].c
.f
== 0.f
);
1601 else if (vtop
[i
].type
.t
== VT_DOUBLE
)
1602 return (vtop
[i
].c
.d
== 0.0);
1603 return (vtop
[i
].c
.ld
== 0.l
);
1606 /* generate a floating point operation 'v = t1 op t2' instruction. The
1607 * two operands are guaranted to have the same floating point type */
1608 void gen_opf(int op
)
1612 x
=0xEE000A00|T2CPR(vtop
->type
.t
);
1630 x
|=0x810000; /* fsubX -> fnegX */
1643 if(op
< TOK_ULT
|| op
> TOK_GT
) {
1644 tcc_error("unknown fp op %x!",op
);
1650 case TOK_LT
: op
=TOK_GT
; break;
1651 case TOK_GE
: op
=TOK_ULE
; break;
1652 case TOK_LE
: op
=TOK_GE
; break;
1653 case TOK_GT
: op
=TOK_ULT
; break;
1656 x
|=0xB40040; /* fcmpX */
1657 if(op
!=TOK_EQ
&& op
!=TOK_NE
)
1658 x
|=0x80; /* fcmpX -> fcmpeX */
1661 o(x
|0x10000|(vfpr(gv(RC_FLOAT
))<<12)); /* fcmp(e)X -> fcmp(e)zX */
1663 x
|=vfpr(gv(RC_FLOAT
));
1665 o(x
|(vfpr(gv(RC_FLOAT
))<<12));
1668 o(0xEEF1FA10); /* fmstat */
1671 case TOK_LE
: op
=TOK_ULE
; break;
1672 case TOK_LT
: op
=TOK_ULT
; break;
1673 case TOK_UGE
: op
=TOK_GE
; break;
1674 case TOK_UGT
: op
=TOK_GT
; break;
1691 vtop
->r
=get_reg_ex(RC_FLOAT
,r
);
1694 o(x
|(vfpr(vtop
->r
)<<12));
1698 static uint32_t is_fconst()
1702 if((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1704 if (vtop
->type
.t
== VT_FLOAT
)
1706 else if (vtop
->type
.t
== VT_DOUBLE
)
1736 /* generate a floating point operation 'v = t1 op t2' instruction. The
1737 two operands are guaranted to have the same floating point type */
1738 void gen_opf(int op
)
1740 uint32_t x
, r
, r2
, c1
, c2
;
1741 //fputs("gen_opf\n",stderr);
1747 #if LDOUBLE_SIZE == 8
1748 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FLOAT
)
1751 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
1753 else if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
)
1764 r
=fpr(gv(RC_FLOAT
));
1771 r2
=fpr(gv(RC_FLOAT
));
1780 r
=fpr(gv(RC_FLOAT
));
1782 } else if(c1
&& c1
<=0xf) {
1785 r
=fpr(gv(RC_FLOAT
));
1790 r
=fpr(gv(RC_FLOAT
));
1792 r2
=fpr(gv(RC_FLOAT
));
1801 r
=fpr(gv(RC_FLOAT
));
1806 r2
=fpr(gv(RC_FLOAT
));
1814 r
=fpr(gv(RC_FLOAT
));
1816 } else if(c1
&& c1
<=0xf) {
1819 r
=fpr(gv(RC_FLOAT
));
1824 r
=fpr(gv(RC_FLOAT
));
1826 r2
=fpr(gv(RC_FLOAT
));
1830 if(op
>= TOK_ULT
&& op
<= TOK_GT
) {
1831 x
|=0xd0f110; // cmfe
1832 /* bug (intention?) in Linux FPU emulator
1833 doesn't set carry if equal */
1839 tcc_error("unsigned comparision on floats?");
1845 op
=TOK_ULE
; /* correct in unordered case only if AC bit in FPSR set */
1849 x
&=~0x400000; // cmfe -> cmf
1871 r
=fpr(gv(RC_FLOAT
));
1878 r2
=fpr(gv(RC_FLOAT
));
1880 vtop
[-1].r
= VT_CMP
;
1883 tcc_error("unknown fp op %x!",op
);
1887 if(vtop
[-1].r
== VT_CMP
)
1893 vtop
[-1].r
=get_reg_ex(RC_FLOAT
,two2mask(vtop
[-1].r
,c1
));
1897 o(x
|(r
<<16)|(c1
<<12)|r2
);
1901 /* convert integers to fp 't' type. Must handle 'int', 'unsigned int'
1902 and 'long long' cases. */
1903 ST_FUNC
void gen_cvt_itof1(int t
)
1907 bt
=vtop
->type
.t
& VT_BTYPE
;
1908 if(bt
== VT_INT
|| bt
== VT_SHORT
|| bt
== VT_BYTE
) {
1914 r2
=vfpr(vtop
->r
=get_reg(RC_FLOAT
));
1915 o(0xEE000A10|(r
<<12)|(r2
<<16)); /* fmsr */
1917 if(!(vtop
->type
.t
& VT_UNSIGNED
))
1918 r2
|=0x80; /* fuitoX -> fsituX */
1919 o(0xEEB80A40|r2
|T2CPR(t
)); /* fYitoX*/
1921 r2
=fpr(vtop
->r
=get_reg(RC_FLOAT
));
1922 if((t
& VT_BTYPE
) != VT_FLOAT
)
1923 dsize
=0x80; /* flts -> fltd */
1924 o(0xEE000110|dsize
|(r2
<<16)|(r
<<12)); /* flts */
1925 if((vtop
->type
.t
& (VT_UNSIGNED
|VT_BTYPE
)) == (VT_UNSIGNED
|VT_INT
)) {
1927 o(0xE3500000|(r
<<12)); /* cmp */
1928 r
=fpr(get_reg(RC_FLOAT
));
1929 if(last_itod_magic
) {
1930 off
=ind
+8-last_itod_magic
;
1935 o(0xBD1F0100|(r
<<12)|off
); /* ldflts */
1937 o(0xEA000000); /* b */
1938 last_itod_magic
=ind
;
1939 o(0x4F800000); /* 4294967296.0f */
1941 o(0xBE000100|dsize
|(r2
<<16)|(r2
<<12)|r
); /* adflt */
1945 } else if(bt
== VT_LLONG
) {
1947 CType
*func_type
= 0;
1948 if((t
& VT_BTYPE
) == VT_FLOAT
) {
1949 func_type
= &func_float_type
;
1950 if(vtop
->type
.t
& VT_UNSIGNED
)
1951 func
=TOK___floatundisf
;
1953 func
=TOK___floatdisf
;
1954 #if LDOUBLE_SIZE != 8
1955 } else if((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1956 func_type
= &func_ldouble_type
;
1957 if(vtop
->type
.t
& VT_UNSIGNED
)
1958 func
=TOK___floatundixf
;
1960 func
=TOK___floatdixf
;
1961 } else if((t
& VT_BTYPE
) == VT_DOUBLE
) {
1963 } else if((t
& VT_BTYPE
) == VT_DOUBLE
|| (t
& VT_BTYPE
) == VT_LDOUBLE
) {
1965 func_type
= &func_double_type
;
1966 if(vtop
->type
.t
& VT_UNSIGNED
)
1967 func
=TOK___floatundidf
;
1969 func
=TOK___floatdidf
;
1972 vpush_global_sym(func_type
, func
);
1980 tcc_error("unimplemented gen_cvt_itof %x!",vtop
->type
.t
);
1983 /* convert fp to int 't' type */
1984 void gen_cvt_ftoi(int t
)
1990 r2
=vtop
->type
.t
& VT_BTYPE
;
1993 r
=vfpr(gv(RC_FLOAT
));
1995 o(0xEEBC0AC0|(r
<<12)|r
|T2CPR(r2
)|u
); /* ftoXizY */
1996 r2
=intr(vtop
->r
=get_reg(RC_INT
));
1997 o(0xEE100A10|(r
<<16)|(r2
<<12));
2002 func
=TOK___fixunssfsi
;
2003 #if LDOUBLE_SIZE != 8
2004 else if(r2
== VT_LDOUBLE
)
2005 func
=TOK___fixunsxfsi
;
2006 else if(r2
== VT_DOUBLE
)
2008 else if(r2
== VT_LDOUBLE
|| r2
== VT_DOUBLE
)
2010 func
=TOK___fixunsdfsi
;
2012 r
=fpr(gv(RC_FLOAT
));
2013 r2
=intr(vtop
->r
=get_reg(RC_INT
));
2014 o(0xEE100170|(r2
<<12)|r
);
2018 } else if(t
== VT_LLONG
) { // unsigned handled in gen_cvt_ftoi1
2021 #if LDOUBLE_SIZE != 8
2022 else if(r2
== VT_LDOUBLE
)
2024 else if(r2
== VT_DOUBLE
)
2026 else if(r2
== VT_LDOUBLE
|| r2
== VT_DOUBLE
)
2031 vpush_global_sym(&func_old_type
, func
);
2036 vtop
->r2
= REG_LRET
;
2040 tcc_error("unimplemented gen_cvt_ftoi!");
2043 /* convert from one floating point type to another */
2044 void gen_cvt_ftof(int t
)
2047 if(((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) != ((t
& VT_BTYPE
) == VT_FLOAT
)) {
2048 uint32_t r
= vfpr(gv(RC_FLOAT
));
2049 o(0xEEB70AC0|(r
<<12)|r
|T2CPR(vtop
->type
.t
));
2052 /* all we have to do on i386 and FPA ARM is to put the float in a register */
2057 /* computed goto support */
2064 /* Save the stack pointer onto the stack and return the location of its address */
2065 ST_FUNC
void gen_vla_sp_save(int addr
) {
2066 tcc_error("variable length arrays unsupported for this target");
2069 /* Restore the SP from a location on the stack */
2070 ST_FUNC
void gen_vla_sp_restore(int addr
) {
2071 tcc_error("variable length arrays unsupported for this target");
2074 /* Subtract from the stack pointer, and push the resulting value onto the stack */
2075 ST_FUNC
void gen_vla_alloc(CType
*type
, int align
) {
2076 tcc_error("variable length arrays unsupported for this target");
2079 /* end of ARM code generator */
2080 /*************************************************************/
2082 /*************************************************************/