Code Generation/Exercise 8: Difference between revisions
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== The Original Code == | == The Original Code == | ||
Consider the following C function: | Consider the following C function: | ||
<c> | <c> | ||
| Line 13: | Line 13: | ||
return ix; | return ix; | ||
} | } | ||
</c> | </c> | ||
directivas: text data rodata bss align label extrn globl const str char id byte double | '''directivas:''' text data rodata bss align label extrn globl const str char id byte double | ||
acesso: addr addra addrv local loca locv load dload ldchr store dstore stchr alloc dup swap push pop int sp | '''acesso:''' addr addra addrv local loca locv load dload ldchr store dstore stchr alloc dup swap push pop int sp | ||
'''aritmética/lógica:''' add dadd sub dsub mul dmul div ddiv mod neg gt ge lt le eq ne cmp | |||
'''bit a bit:''' rotl rotr shtl shtru shtrs and or not xor | |||
== Postfix Code == | '''funções/saltos:''' call ret start enter leave trash jmp jz jnz branch leap | ||
== Postfix Code == | |||
The Postfix code for the above function is as follows: | The Postfix code for the above function is as follows: | ||
| Line 30: | Line 31: | ||
<asm> | <asm> | ||
</asm> | </asm> | ||
== Compiling and Running == | == Compiling and Running == | ||
To compile the Postfix code directly, [[ | To compile the Postfix code directly, [[Pf2asm]] can be used: | ||
* pf2asm printlist.pf | *pf2asm printlist.pf | ||
* yasm -felf printlist.asm | *yasm -felf printlist.asm | ||
[[ | [[Category:Compilers]] [[Category:Teaching]] | ||
[[ | |||
Revision as of 16:18, 2 June 2012
The Original Code
Consider the following C function:
<c> extern int printf(const char *format, ...); int printlist(int lo, int hi) {
int ix = lo;
while (ix < hi) {
printf("%d\n", ix);
ix++;
}
return ix;
} </c>
directivas: text data rodata bss align label extrn globl const str char id byte double
acesso: addr addra addrv local loca locv load dload ldchr store dstore stchr alloc dup swap push pop int sp
aritmética/lógica: add dadd sub dsub mul dmul div ddiv mod neg gt ge lt le eq ne cmp
bit a bit: rotl rotr shtl shtru shtrs and or not xor
funções/saltos: call ret start enter leave trash jmp jz jnz branch leap
Postfix Code
The Postfix code for the above function is as follows:
<asm>
</asm>
Compiling and Running
To compile the Postfix code directly, Pf2asm can be used:
- pf2asm printlist.pf
- yasm -felf printlist.asm