- _chufa64: @64位除以32位软件除法
- [url=home.php?mod=space&uid=72445]@[/url] r0-r1除以r2等于R0-R1余数R2
- push {r4-r7}
- mov r3, r0
- mov r6, r1
- movs r4, # 1
- mov r7, r4
- lsls r4, r4, # 31
- movs r0, # 0
- mov r5, r0
- _chufaxunhuan64:
- lsls r3, r3, # 1
- adcs r5, r5, r5
- cmp r5, r2
- bcc _chufaweishubudao64
- adds r0, r0, r4
- subs r5, r5, r2
- _chufaweishubudao64:
- lsrs r4, r4, # 1
- bne _chufaxunhuan64
- push {r0}
- lsls r7, r7, # 31
- bpl _chufafanhui64
- mov r4, r7
- mov r3, r6
- movs r0, # 0
- b _chufaxunhuan64
- _chufafanhui64:
- mov r1, r0
- mov r2, r5
- pop {r0}
- pop {r0}
- pop {r4-r7}
- bx lr
- _chufa: @软件除法
- @ r0 除以 r1 等于 商(r0)余数(r1)
- push {r4}
- mov r2, r0
- movs r3, # 1
- lsls r3, r3, # 31
- movs r0, # 0
- mov r4, r0
- _chufaxunhuan:
- lsls r2, r2, # 1
- adcs r4, r4, r4
- cmp r4, r1
- bcc _chufaweishubudao0
- adds r0, r0, r3
- subs r4, r4, r1
- _chufaweishubudao0:
- lsrs r3, r3, # 1
- bne _chufaxunhuan
- mov r1, r4
- pop {r4}
- bx lr
chufa.zip
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