fpu - printing floating points

gistfile1.asm

; compiled on linux 64 bit using the following
;
; nasm -f elf32 print.asm -o print.o
; gcc -m32 print.o -o print
;

[bits 32]

section .text

extern printf
global main

main:
   ; load pi into st(0)
   fldpi

   ; prepare some space on the stack
   sub   esp, 8
   ; to be able to push st(0) in there
   fstp  qword [esp]
   ; get the string format on the stack as well
   push  format
   ; print the string
   call  printf

   ; repair the stack
   ;   4 bytes memory address (for the format)
   ; + 8 bytes memory for the float
   ; =========
   ;  12 bytes
   add   esp, 12

   ; exit without error
   xor   eax, eax
   ret

section .data

format: db "%.20g",10,0