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Convert C code to assembly http://forum.andestech.com/viewtopic.php?f=16&t=597 |
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Author: | cindy [ Tue Jul 24, 2012 5:34 pm ] |
Post subject: | Convert C code to assembly |
Using the following command line: Code: nds32le-elf-gcc -S func.c -o func.S func.c Code: int add(int,int); int add(int a, int b) { int c; c=a+b; return c; } func.S Code: ! For N903-S N903A-S N1033-S N1033A-S N1213-S N1233-S
! Use little-endian byte order ! Generate baseline V2 instructions ! Generate 16/32-bit mixed instructions ! Generate multiply with accumulation instructions using register $d0/$d1 ! Generate integer div instructions using register $d0/$d1 ! Generate performance extension instructions ! Generate instructions for ABI: 2 .file 1 "func.c" .abi_2 .section .mdebug.abi_nds32 .previous .text .align 2 .globl add .type add, @function add: ! pretend args size: 0, auto vars size: 16, pushed regs size: 4, outgoing args size: 0 ! max argument reg: $r1 ! frame pointer: $fp, needed: yes ! $fp ! use $r8 as function entrypoint: no ! use v3 push/pop: no ! prologue frame size: 24 smw.adm $sp, [$sp], $sp, 8 addi $fp, $sp, 0 addi $sp, $sp, -20 ! end of prologue swi $r0, [$fp+(-16)] swi $r1, [$fp+(-20)] lwi $r1, [$fp+(-16)] lwi $r0, [$fp+(-20)] add $r0, $r1, $r0 swi $r0, [$fp+(-8)] lwi $r0, [$fp+(-8)] ! epilogue - AABI addi $sp, $fp, 0 lmw.bim $sp, [$sp], $sp, 8 .hint_func_args 62 ret .size add, .-add .ident "GCC: (2012-03-16) 4.4.4" |
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