diff options
Diffstat (limited to 'third_party/libaeabi-cortexm0/core/cortex-m0/div.S')
| -rw-r--r-- | third_party/libaeabi-cortexm0/core/cortex-m0/div.S | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/third_party/libaeabi-cortexm0/core/cortex-m0/div.S b/third_party/libaeabi-cortexm0/core/cortex-m0/div.S deleted file mode 100644 index 06dc7afacb..0000000000 --- a/third_party/libaeabi-cortexm0/core/cortex-m0/div.S +++ /dev/null @@ -1,167 +0,0 @@ -/* Runtime ABI for the ARM Cortex-M0 - * idiv.S: signed 32 bit division (only quotient) - * idivmod.S: signed 32 bit division (quotient and remainder) - * uidivmod.S: unsigned 32 bit division - * - * Copyright (c) 2012 Jörg Mische <bobbl@gmx.de> - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT - * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#include "software_panic.h" - - - .syntax unified - .text - .thumb - .cpu cortex-m0 - -@ int __aeabi_idiv(int num:r0, int denom:r1) -@ -@ Divide r0 by r1 and return quotient in r0 (all signed). -@ Use __aeabi_uidivmod() but check signs before and change signs afterwards. -@ - .thumb_func - .section .text.__aeabi_idiv - .global __aeabi_idiv -__aeabi_idiv: - - cmp r0, #0 - bge L_num_pos - - rsbs r0, r0, #0 @ num = -num - - cmp r1, #0 - bge L_neg_result - - rsbs r1, r1, #0 @ den = -den - b __aeabi_uidivmod - -L_num_pos: - cmp r1, #0 - bge __aeabi_uidivmod - - rsbs r1, r1, #0 @ den = -den - -L_neg_result: - push {lr} - bl __aeabi_uidivmod - rsbs r0, r0, #0 @ quot = -quot - pop {pc} - - - -@ {int quotient:r0, int remainder:r1} -@ __aeabi_idivmod(int numerator:r0, int denominator:r1) -@ -@ Divide r0 by r1 and return the quotient in r0 and the remainder in r1 -@ - .thumb_func - .section .text.__aeabi_idivmod - .global __aeabi_idivmod -__aeabi_idivmod: - - cmp r0, #0 - bge L_num_pos_bis - - rsbs r0, r0, #0 @ num = -num - - cmp r1, #0 - bge L_neg_both - - rsbs r1, r1, #0 @ den = -den - push {lr} - bl __aeabi_uidivmod - rsbs r1, r1, #0 @ rem = -rem - pop {pc} - -L_neg_both: - push {lr} - bl __aeabi_uidivmod - rsbs r0, r0, #0 @ quot = -quot - rsbs r1, r1, #0 @ rem = -rem - pop {pc} - -L_num_pos_bis: - cmp r1, #0 - bge __aeabi_uidivmod - - rsbs r1, r1, #0 @ den = -den - push {lr} - bl __aeabi_uidivmod - rsbs r0, r0, #0 @ quot = -quot - pop {pc} - - - -@ unsigned __aeabi_uidiv(unsigned num, unsigned denom) -@ -@ Just an alias for __aeabi_uidivmod(), the remainder is ignored -@ - .thumb_func - .section .text.__aeabi_uidivmod - .global __aeabi_uidiv -__aeabi_uidiv: - - - -@ {unsigned quotient:r0, unsigned remainder:r1} -@ __aeabi_uidivmod(unsigned numerator:r0, unsigned denominator:r1) -@ -@ Divide r0 by r1 and return the quotient in r0 and the remainder in r1 -@ - .thumb_func - .global __aeabi_uidivmod -__aeabi_uidivmod: - - - cmp r1, #0 - bne L_no_div0 - b __aeabi_idiv0 -L_no_div0: - - @ Shift left the denominator until it is greater than the numerator - movs r2, #1 @ counter - movs r3, #0 @ result - cmp r0, r1 - bls L_sub_loop0 - adds r1, #0 @ dont shift if denominator would overflow - bmi L_sub_loop0 - -L_denom_shift_loop: - lsls r2, #1 - lsls r1, #1 - bmi L_sub_loop0 - cmp r0, r1 - bhi L_denom_shift_loop - -L_sub_loop0: - cmp r0, r1 - bcc L_dont_sub0 @ if (num>denom) - - subs r0, r1 @ numerator -= denom - orrs r3, r2 @ result(r3) |= bitmask(r2) -L_dont_sub0: - - lsrs r1, #1 @ denom(r1) >>= 1 - lsrs r2, #1 @ bitmask(r2) >>= 1 - bne L_sub_loop0 - - mov r1, r0 @ remainder(r1) = numerator(r0) - mov r0, r3 @ quotient(r0) = result(r3) - bx lr - -__aeabi_idiv0: - ldr SOFTWARE_PANIC_REASON_REG, =PANIC_SW_DIV_ZERO - mov SOFTWARE_PANIC_INFO_REG, r14 - bl exception_panic |