circuitpython/py/nlrmips.c

87 lines
2.8 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2017 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mpstate.h"
#if MICROPY_NLR_MIPS
__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr);
__asm(
".globl nlr_push \n"
"nlr_push: \n"
".ent nlr_push \n"
".frame $29, 0, $31 \n"
".set noreorder \n"
".cpload $25 \n"
".set reorder \n"
"sw $31, 8($4) \n" /* is the offset of regs in nlr_buf_t */
"sw $30, 12($4) \n"
"sw $29, 16($4) \n"
"sw $28, 20($4) \n"
"sw $23, 24($4) \n"
"sw $22, 28($4) \n"
"sw $21, 32($4) \n"
"sw $20, 36($4) \n"
"sw $19, 40($4) \n"
"sw $18, 44($4) \n"
"sw $17, 48($4) \n"
"sw $16, 52($4) \n"
#ifdef __pic__
"la $25, nlr_push_tail \n"
#endif
"j nlr_push_tail \n"
".end nlr_push \n"
);
NORETURN void nlr_jump(void *val) {
MP_NLR_JUMP_HEAD(val, top)
__asm(
"move $4, %0 \n"
"lw $31, 8($4) \n"
"lw $30, 12($4) \n"
"lw $29, 16($4) \n"
"lw $28, 20($4) \n"
"lw $23, 24($4) \n"
"lw $22, 28($4) \n"
"lw $21, 32($4) \n"
"lw $20, 36($4) \n"
"lw $19, 40($4) \n"
"lw $18, 44($4) \n"
"lw $17, 48($4) \n"
"lw $16, 52($4) \n"
"lui $2,1 \n" // set return value 1
"j $31 \n"
"nop \n"
:
: "r" (top)
:
);
MP_UNREACHABLE
}
#endif // MICROPY_NLR_MIPS