Untitled

#include
int main()
{
 double a=3.0, b=4.0, c;

 c=5.0;
 printf("%s, a=%e, b=%e, c=%e\n","c=5.0", a, b, c);
 c=a+b;
 printf("%s, a=%e, b=%e, c=%e\n","c=a+b", a, b, c);
 c=a-b;
 printf("%s, a=%e, b=%e, c=%e\n","c=a-b", a, b, c);
 c=a*b;
 printf("%s, a=%e, b=%e, c=%e\n","c=a*b", a, b, c);
 c=c/a;
 printf("%s, a=%e, b=%e, c=%e\n","c=c/a", a, b, c);
 return 0;
 }


extern printf ; the C function to be called
%macro pabc 1 ; a "simple" print macro
section .data
.str db %1,0 ; %1 is macro call first actual parameter
section .text
; push onto stack backwards
push dword [c+4] ; double c (bottom)
push dword [c] ; double c
push dword [b+4] ; double b (bottom)
push dword [b] ; double b
push dword [a+4] ; double a (bottom)
push dword [a] ; double a
push dword .str ; users string
 push dword fmt ; address of format string
 call printf ; Call C function
 add esp,32 ; pop stack 8*4 bytes
%endmacro
section .data ; preset constants, writeable
a: dq 3.333333333 ; 64-bit variable a initialized to 3.0
b: dq 4.444444444 ; 64-bit variable b initializes to 4.0
five: dq 5.0 ; constant 5.0
fmt: db "%s, a=%e, b=%e, c=%e",10,0 ; format string for printf
section .bss ; unitialized space
c: resq 1 ; reserve a 64-bit word
section .text ; instructions, code segment
global main ; for gcc standard linking
main: ; label
lit5: ; c=5.0;
fld qword [five] ; 5.0 constant
fstp qword [c] ; store into c
pabc "c=5.0" ; invoke the print macro
addb: ; c=a+b;
fld qword [a] ; load a (pushed on flt pt stack, st0)
fadd qword [b] ; floating add b (to st0)
fstp qword [c] ; store into c (pop flt pt stack)
pabc "c=a+b" ; invoke the print macro
subb: ; c=a-b;
fld qword [a] ; load a (pushed on flt pt stack, st0)
fsub qword [b] ; floating subtract b (to st0)
fstp qword [c] ; store into c (pop flt pt stack)
pabc "c=a-b" ; invoke the print macro
mulb: ; c=a*b;
fld qword [a] ; load a (pushed on flt pt stack, st0)
fmul qword [b] ; floating multiply by b (to st0)
fstp qword [c]; store product into c (pop flt pt stack)
pabc "c=a*b" ; invoke the print macro
diva: ; c=c/a;
fld qword [c] ; load c (pushed on flt pt stack, st0)
fdiv qword [a] ; floating divide by a (to st0)
fstp qword [c]; store quotient into c (pop flt pt stack)
pabc "c=c/a" ; invoke the print macro
 mov eax,0 ; exit code, 0=normal
ret ; main returns to operating system