; fltfunc.asm  call math routine  double sin(double x)
; 
; compile:	nasm -f elf fltfunc.asm 
; link:		gcc -o fltfunc.o -lm    # needs math library
; run:		fltfunc
; 
	extern	sin
	extern	printf
	section .data
x:	dq	0.7853975	; Pi/4 = 45 degrees
y:	dq	1.0		; should be about 7.07E-1
fmt:	db	"%e = sin(%e)",10,0
	global	main
main:	push	ebp
	mov	ebp,esp
	push	ebx

	push	dword [x+4]
	push	dword [x]
	call	sin
	add	esp,8
	fstp	qword [y]

	push	dword [x+4]
	push	dword [x]
	push	dword [y+4]
	push	dword [y]
	push	dword fmt
	call	printf
	add	esp,20

	pop	ebx
	mov	esp,ebp
	pop	ebp
	mov	eax,0
	ret

; result:	7.071063e-01 = sin(7.853975e-01)