_strlen.asm
来自「很少见的源码公开的msc51和z80的c编译器。」· 汇编 代码 · 共 104 行
ASM
104 行
;--------------------------------------------------------; File Created by SDCC : FreeWare ANSI-C Compiler; Version 2.3.0 Thu Sep 20 10:57:16 2001;-------------------------------------------------------- .module _strlen ;--------------------------------------------------------; Public variables in this module;-------------------------------------------------------- .globl _strlen;--------------------------------------------------------; special function registers;--------------------------------------------------------;--------------------------------------------------------; special function bits ;--------------------------------------------------------;--------------------------------------------------------; internal ram data;-------------------------------------------------------- .area DSEG (DATA);--------------------------------------------------------; overlayable items in internal ram ;-------------------------------------------------------- .area _DUMMY .area OSEG (OVR,DATA);--------------------------------------------------------; indirectly addressable internal ram data;-------------------------------------------------------- .area ISEG (DATA);--------------------------------------------------------; bit data;-------------------------------------------------------- .area BSEG (BIT);--------------------------------------------------------; external ram data;-------------------------------------------------------- .area XSEG (XDATA);--------------------------------------------------------; global & static initialisations;-------------------------------------------------------- .area GSINIT (CODE) .area GSFINAL (CODE) .area GSINIT (CODE);--------------------------------------------------------; Home;-------------------------------------------------------- .area HOME (CODE) .area CSEG (CODE);--------------------------------------------------------; code;-------------------------------------------------------- .area CSEG (CODE);------------------------------------------------------------;Allocation info for local variables in function 'strlen';------------------------------------------------------------; _strlen.c 27; -----------------------------------------; function strlen; -----------------------------------------_strlen: ar2 = 0x02 ar3 = 0x03 ar4 = 0x04 ar5 = 0x05 ar6 = 0x06 ar7 = 0x07 ar0 = 0x00 ar1 = 0x01; _strlen.c 34 mov r2,dpl mov r3,dph mov r4,b; _strlen.c 31 mov r5,#0x00 mov r6,#0x0000101$: mov dpl,r2 mov dph,r3 mov b,r4 lcall __gptrget mov r7,a inc dptr mov r2,dpl mov r3,dph mov a,r7; Peephole 110 removed ljmp by inverse jump logic jz 00103$00108$:; _strlen.c 32; tail increment optimized inc r5 cjne r5,#0x00,00101$ inc r6; Peephole 132 changed ljmp to sjmp sjmp 00101$00103$:; _strlen.c 34 mov dpl,r5 mov dph,r600104$: ret .area CSEG (CODE)⌨️ 快捷键说明
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