]>
Commit | Line | Data |
---|---|---|
99dee823 | 1 | /* Copyright (C) 2019-2021 Free Software Foundation, Inc. |
f30dd607 GJL |
2 | |
3 | This file is part of LIBF7, which is part of GCC. | |
4 | ||
5 | GCC is free software; you can redistribute it and/or modify it under | |
6 | the terms of the GNU General Public License as published by the Free | |
7 | Software Foundation; either version 3, or (at your option) any later | |
8 | version. | |
9 | ||
10 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
11 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | for more details. | |
14 | ||
15 | Under Section 7 of GPL version 3, you are granted additional | |
16 | permissions described in the GCC Runtime Library Exception, version | |
17 | 3.1, as published by the Free Software Foundation. | |
18 | ||
19 | You should have received a copy of the GNU General Public License and | |
20 | a copy of the GCC Runtime Library Exception along with this program; | |
21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
22 | <http://www.gnu.org/licenses/>. */ | |
23 | ||
24 | #ifndef ASM_DEFS_H | |
25 | #define ASM_DEFS_H | |
26 | ||
27 | #ifdef __AVR__ | |
28 | #ifdef __ASSEMBLER__ | |
29 | /*****************************************************************/ | |
30 | /* Stuff for Assembler-only */ | |
31 | /*****************************************************************/ | |
32 | ||
33 | #if defined (__AVR_TINY__) | |
34 | #define __tmp_reg__ 16 | |
35 | #define __zero_reg__ 17 | |
36 | #else | |
37 | #define __tmp_reg__ 0 | |
38 | #define __zero_reg__ 1 | |
39 | #endif /* AVR_TINY */ | |
40 | ||
41 | #define __SREG__ 0x3f | |
42 | #define __SP_L__ 0x3d | |
43 | #if defined (__AVR_HAVE_SPH__) | |
44 | #define __SP_H__ 0x3e | |
45 | #endif | |
46 | ||
47 | #if !defined ASM_DEFS_HAVE_DEFUN | |
48 | .macro DEFUN name | |
49 | .global \name | |
50 | .func \name | |
51 | \name: | |
52 | .endm | |
53 | ||
54 | .macro ENDF name | |
55 | .size \name, .-\name | |
56 | .endfunc | |
57 | .endm | |
58 | ||
59 | .macro LABEL name | |
60 | .global \name | |
61 | \name: | |
62 | .endm | |
63 | #endif /* HAVE_DEFUN */ | |
64 | ||
65 | ||
66 | #if defined (__AVR_HAVE_JMP_CALL__) | |
67 | #define XCALL call | |
68 | #define XJMP jmp | |
69 | #else | |
70 | #define XCALL rcall | |
71 | #define XJMP rjmp | |
72 | #endif | |
73 | ||
74 | #if defined (__AVR_HAVE_EIJMP_EICALL__) | |
75 | #define XICALL eicall | |
76 | #define XIJMP eijmp | |
77 | #define PC_SIZE 3 | |
78 | #else | |
79 | #define XICALL icall | |
80 | #define XIJMP ijmp | |
81 | #define PC_SIZE 2 | |
82 | #endif | |
83 | ||
84 | .macro skipnext | |
85 | cpse r16, r16 | |
86 | .endm | |
87 | ||
88 | /* | |
89 | Factor out support of MOVW. Usage is like | |
90 | ||
91 | wmov 30, 24 | |
92 | ||
93 | to move R25:R24 to R31:R30, i.e. plain register numbers | |
94 | are required and no register prefix 'R'. | |
95 | */ | |
96 | ||
97 | #if defined (__AVR_HAVE_MOVW__) | |
98 | #define wmov movw | |
99 | #else | |
100 | .macro wmov dst src | |
101 | ..dst = \dst | |
102 | ..src = \src | |
103 | ..regno = 0 | |
104 | .irp reg, \ | |
105 | r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, \ | |
106 | r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, \ | |
107 | r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, \ | |
108 | r30, r31 | |
109 | .ifc \reg,\dst | |
110 | ..dst = ..regno | |
111 | .endif | |
112 | .ifc \reg,\src | |
113 | ..src = ..regno | |
114 | .endif | |
115 | ..regno = ..regno + 1 | |
116 | .endr | |
117 | ||
118 | ..regno = 0 | |
119 | ||
120 | .irp reg, \ | |
121 | R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, \ | |
122 | R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, \ | |
123 | R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, \ | |
124 | R30, R31 | |
125 | .ifc \reg,\dst | |
126 | ..dst = ..regno | |
127 | .endif | |
128 | .ifc \reg,\src | |
129 | ..src = ..regno | |
130 | .endif | |
131 | ..regno = ..regno + 1 | |
132 | .endr | |
133 | ||
134 | ..regno = 0 | |
135 | ||
136 | .irp reg, \ | |
137 | X, x, XL, xl, Xl, xL, x, x \ | |
138 | Y, y, YL, yl, Yl, yL, y, y, \ | |
139 | Z, z, ZL, zl, Zl, zL, z, z | |
140 | .ifc \reg,\dst | |
141 | ..dst = (..regno / 8) + 26 | |
142 | .endif | |
143 | .ifc \reg,\src | |
144 | ..src = (..regno / 8) + 26 | |
145 | .endif | |
146 | ..regno = ..regno + 1 | |
147 | .endr | |
148 | ||
149 | mov ..dst+0, ..src+0 | |
150 | mov ..dst+1, ..src+1 | |
151 | .endm | |
152 | #endif /* MOVW */ | |
153 | ||
154 | ||
155 | #if !defined (__AVR_TINY__) | |
156 | /* | |
157 | Convenience macro for easy use of __prologue_saves__ from libgcc. | |
158 | Push the N_PUSHED callee-saved registers Y, R17, R16, R15, ... | |
159 | with 0 <= N_PUSHED <= 18. The frame pointer (Y) is set up according | |
160 | to a frame size of N_FRAME. Clobbers TMP_REG. | |
161 | For the code of __prologue_saves__ from libgcc see | |
162 | http://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/avr/lib1funcs.S?revision=267494&view=markup#l2159 | |
163 | */ | |
164 | ||
165 | .macro do_prologue_saves n_pushed n_frame=0 | |
166 | ldi r26, lo8(\n_frame) | |
167 | ldi r27, hi8(\n_frame) | |
168 | ldi r30, lo8(gs(.L_prologue_saves.\@)) | |
169 | ldi r31, hi8(gs(.L_prologue_saves.\@)) | |
170 | XJMP __prologue_saves__ + ((18 - (\n_pushed)) * 2) | |
171 | .L_prologue_saves.\@: | |
172 | .endm | |
173 | ||
174 | /* | |
175 | Convenience macro for easy use of __epilogue_restores__ from libgcc. | |
176 | Undo the effect of __prologue_saves__. Clobbers TMP_REG. | |
177 | For the code of __epilogue_restores__ from libgcc see | |
178 | http://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/avr/lib1funcs.S?revision=267494&view=markup#l2216 | |
179 | */ | |
180 | ||
181 | .macro do_epilogue_restores n_pushed n_frame=0 | |
182 | in r28, __SP_L__ | |
183 | #ifdef __AVR_HAVE_SPH__ | |
184 | in r29, __SP_H__ | |
185 | .if \n_frame > 63 | |
186 | subi r28, lo8(-\n_frame) | |
187 | sbci r29, hi8(-\n_frame) | |
188 | .elseif \n_frame > 0 | |
189 | adiw r28, \n_frame | |
190 | .endif | |
191 | #else | |
192 | clr r29 | |
193 | .if \n_frame > 0 | |
194 | subi r28, lo8(-\n_frame) | |
195 | .endif | |
196 | #endif /* HAVE SPH */ | |
197 | ldi r30, \n_pushed | |
198 | XJMP __epilogue_restores__ + ((18 - (\n_pushed)) * 2) | |
199 | .endm | |
200 | ||
201 | #endif /* AVR_TINY */ | |
202 | ||
203 | #else /* Assembler */ | |
204 | /*****************************************************************/ | |
205 | /* Space for C/C++ only Stuff */ | |
206 | /*****************************************************************/ | |
207 | #endif /* Assembler */ | |
208 | ||
209 | /*****************************************************************/ | |
210 | /* Space for Generic Stuff (Assembler, C, C++) */ | |
211 | /*****************************************************************/ | |
212 | ||
213 | #ifdef __AVR_PM_BASE_ADDRESS__ | |
214 | /* | |
215 | Devices with a linear address space: Flash memory is seen in the | |
216 | RAM address space at an offset of __AVR_PM_BASE_ADDRESS__ and can | |
217 | be accessed by LD*. This is the case for devices like ATtiny40 | |
218 | (avrtiny) or ATtiny1616 and ATmega4808 (avrxmega3). The default | |
219 | linker script locates .rodata in the .text output section and | |
220 | at the required offset. | |
221 | */ | |
222 | #define RODATA_SECTION .rodata.asm | |
223 | #define USE_LD 1 | |
224 | #define USE_LPM 0 | |
225 | #else /* PM_BASE_ADDRESS */ | |
226 | /* | |
227 | No linear address space. As .rodata is located in RAM, we have to | |
228 | use .progmem.data (located in flash) and LPM to read the data. | |
229 | This will also work for devices from avrxmega3. | |
230 | */ | |
231 | #define RODATA_SECTION .progmem.data.asm | |
232 | #define USE_LD 0 | |
233 | #define USE_LPM 1 | |
234 | #endif /* PM_BASE_ADDRESS */ | |
235 | ||
236 | #endif /* target AVR */ | |
237 | #endif /* ASM_DEFS_H */ |