| /* Copyright (C) 2019-2020 Free Software Foundation, Inc. |
| |
| This file is part of LIBF7, which is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef ASM_DEFS_H |
| #define ASM_DEFS_H |
| |
| #ifdef __AVR__ |
| #ifdef __ASSEMBLER__ |
| /*****************************************************************/ |
| /* Stuff for Assembler-only */ |
| /*****************************************************************/ |
| |
| #if defined (__AVR_TINY__) |
| #define __tmp_reg__ 16 |
| #define __zero_reg__ 17 |
| #else |
| #define __tmp_reg__ 0 |
| #define __zero_reg__ 1 |
| #endif /* AVR_TINY */ |
| |
| #define __SREG__ 0x3f |
| #define __SP_L__ 0x3d |
| #if defined (__AVR_HAVE_SPH__) |
| #define __SP_H__ 0x3e |
| #endif |
| |
| #if !defined ASM_DEFS_HAVE_DEFUN |
| .macro DEFUN name |
| .global \name |
| .func \name |
| \name: |
| .endm |
| |
| .macro ENDF name |
| .size \name, .-\name |
| .endfunc |
| .endm |
| |
| .macro LABEL name |
| .global \name |
| \name: |
| .endm |
| #endif /* HAVE_DEFUN */ |
| |
| |
| #if defined (__AVR_HAVE_JMP_CALL__) |
| #define XCALL call |
| #define XJMP jmp |
| #else |
| #define XCALL rcall |
| #define XJMP rjmp |
| #endif |
| |
| #if defined (__AVR_HAVE_EIJMP_EICALL__) |
| #define XICALL eicall |
| #define XIJMP eijmp |
| #define PC_SIZE 3 |
| #else |
| #define XICALL icall |
| #define XIJMP ijmp |
| #define PC_SIZE 2 |
| #endif |
| |
| .macro skipnext |
| cpse r16, r16 |
| .endm |
| |
| /* |
| Factor out support of MOVW. Usage is like |
| |
| wmov 30, 24 |
| |
| to move R25:R24 to R31:R30, i.e. plain register numbers |
| are required and no register prefix 'R'. |
| */ |
| |
| #if defined (__AVR_HAVE_MOVW__) |
| #define wmov movw |
| #else |
| .macro wmov dst src |
| ..dst = \dst |
| ..src = \src |
| ..regno = 0 |
| .irp reg, \ |
| r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, \ |
| r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, \ |
| r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, \ |
| r30, r31 |
| .ifc \reg,\dst |
| ..dst = ..regno |
| .endif |
| .ifc \reg,\src |
| ..src = ..regno |
| .endif |
| ..regno = ..regno + 1 |
| .endr |
| |
| ..regno = 0 |
| |
| .irp reg, \ |
| R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, \ |
| R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, \ |
| R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, \ |
| R30, R31 |
| .ifc \reg,\dst |
| ..dst = ..regno |
| .endif |
| .ifc \reg,\src |
| ..src = ..regno |
| .endif |
| ..regno = ..regno + 1 |
| .endr |
| |
| ..regno = 0 |
| |
| .irp reg, \ |
| X, x, XL, xl, Xl, xL, x, x \ |
| Y, y, YL, yl, Yl, yL, y, y, \ |
| Z, z, ZL, zl, Zl, zL, z, z |
| .ifc \reg,\dst |
| ..dst = (..regno / 8) + 26 |
| .endif |
| .ifc \reg,\src |
| ..src = (..regno / 8) + 26 |
| .endif |
| ..regno = ..regno + 1 |
| .endr |
| |
| mov ..dst+0, ..src+0 |
| mov ..dst+1, ..src+1 |
| .endm |
| #endif /* MOVW */ |
| |
| |
| #if !defined (__AVR_TINY__) |
| /* |
| Convenience macro for easy use of __prologue_saves__ from libgcc. |
| Push the N_PUSHED callee-saved registers Y, R17, R16, R15, ... |
| with 0 <= N_PUSHED <= 18. The frame pointer (Y) is set up according |
| to a frame size of N_FRAME. Clobbers TMP_REG. |
| For the code of __prologue_saves__ from libgcc see |
| http://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/avr/lib1funcs.S?revision=267494&view=markup#l2159 |
| */ |
| |
| .macro do_prologue_saves n_pushed n_frame=0 |
| ldi r26, lo8(\n_frame) |
| ldi r27, hi8(\n_frame) |
| ldi r30, lo8(gs(.L_prologue_saves.\@)) |
| ldi r31, hi8(gs(.L_prologue_saves.\@)) |
| XJMP __prologue_saves__ + ((18 - (\n_pushed)) * 2) |
| .L_prologue_saves.\@: |
| .endm |
| |
| /* |
| Convenience macro for easy use of __epilogue_restores__ from libgcc. |
| Undo the effect of __prologue_saves__. Clobbers TMP_REG. |
| For the code of __epilogue_restores__ from libgcc see |
| http://gcc.gnu.org/viewcvs/gcc/trunk/libgcc/config/avr/lib1funcs.S?revision=267494&view=markup#l2216 |
| */ |
| |
| .macro do_epilogue_restores n_pushed n_frame=0 |
| in r28, __SP_L__ |
| #ifdef __AVR_HAVE_SPH__ |
| in r29, __SP_H__ |
| .if \n_frame > 63 |
| subi r28, lo8(-\n_frame) |
| sbci r29, hi8(-\n_frame) |
| .elseif \n_frame > 0 |
| adiw r28, \n_frame |
| .endif |
| #else |
| clr r29 |
| .if \n_frame > 0 |
| subi r28, lo8(-\n_frame) |
| .endif |
| #endif /* HAVE SPH */ |
| ldi r30, \n_pushed |
| XJMP __epilogue_restores__ + ((18 - (\n_pushed)) * 2) |
| .endm |
| |
| #endif /* AVR_TINY */ |
| |
| #else /* Assembler */ |
| /*****************************************************************/ |
| /* Space for C/C++ only Stuff */ |
| /*****************************************************************/ |
| #endif /* Assembler */ |
| |
| /*****************************************************************/ |
| /* Space for Generic Stuff (Assembler, C, C++) */ |
| /*****************************************************************/ |
| |
| #ifdef __AVR_PM_BASE_ADDRESS__ |
| /* |
| Devices with a linear address space: Flash memory is seen in the |
| RAM address space at an offset of __AVR_PM_BASE_ADDRESS__ and can |
| be accessed by LD*. This is the case for devices like ATtiny40 |
| (avrtiny) or ATtiny1616 and ATmega4808 (avrxmega3). The default |
| linker script locates .rodata in the .text output section and |
| at the required offset. |
| */ |
| #define RODATA_SECTION .rodata.asm |
| #define USE_LD 1 |
| #define USE_LPM 0 |
| #else /* PM_BASE_ADDRESS */ |
| /* |
| No linear address space. As .rodata is located in RAM, we have to |
| use .progmem.data (located in flash) and LPM to read the data. |
| This will also work for devices from avrxmega3. |
| */ |
| #define RODATA_SECTION .progmem.data.asm |
| #define USE_LD 0 |
| #define USE_LPM 1 |
| #endif /* PM_BASE_ADDRESS */ |
| |
| #endif /* target AVR */ |
| #endif /* ASM_DEFS_H */ |
