mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 08:26:14 +00:00
80 lines
1.3 KiB
C
80 lines
1.3 KiB
C
#include "tests/asm.h"
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#include <stdio.h>
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int arg = 0;
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int res = 0;
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extern void loop_plain ( void );
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asm("\n"
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".text\n"
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VG_SYM(loop_plain) ":\n"
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"\tpushl %ecx\n"
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"\tmovl $999, %eax\n"
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"\tmovl " VG_SYM(arg) ", %ecx\n"
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"0:\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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"\tloop 0b\n"
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"\tmovl %eax, " VG_SYM(res) "\n"
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"\tpopl %ecx\n"
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"\tret\n"
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);
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extern void loop_ne ( void );
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asm("\n"
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".text\n"
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VG_SYM(loop_ne) ":\n"
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"\tpushl %ecx\n"
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"\tmovl $999, %eax\n"
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"\tmovl " VG_SYM(arg) ", %ecx\n"
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"0:\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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"\tloopne 0b\n"
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"\tmovl %eax, " VG_SYM(res) "\n"
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"\tpopl %ecx\n"
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"\tret\n"
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);
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extern void loop_e ( void );
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asm("\n"
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".text\n"
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VG_SYM(loop_e) ":\n"
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"\tpushl %ecx\n"
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"\tmovl $999, %eax\n"
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"\tmovl " VG_SYM(arg) ", %ecx\n"
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"0:\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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"\tdecl %eax\n"
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/* invert the Z flag */
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"\tpushfl\n"
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"\txorl $64, 0(%esp)\n"
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"\tpopfl\n"
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"\tloope 0b\n"
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"\tmovl %eax, " VG_SYM(res) "\n"
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"\tpopl %ecx\n"
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"\tret\n"
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);
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int main ( void )
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{
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res = 0; arg = 10; loop_plain(); printf("res = %d\n", res);
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res = 0; arg = 10; loop_ne(); printf("res = %d\n", res);
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res = 0; arg = 500; loop_ne(); printf("res = %d\n", res);
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res = 0; arg = 10; loop_e(); printf("res = %d\n", res);
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res = 0; arg = 500; loop_e(); printf("res = %d\n", res);
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return 0;
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}
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