source: xtideuniversalbios/trunk/Assembly_Library/Inc/Math.inc @ 41

; File name     :   Math.inc
; Project name  :   Assembly Library
; Created date  :   12.8.2010
; Last update   :   12.8.2010
; Author        :   Tomi Tilli
; Description   :   Math related macros.
%ifndef MATH_INC
%define MATH_INC

FALSE       EQU     0
TRUE        EQU     1


;--------------------------------------------------------------------
; MIN_U     Unsigned comparison
; MIN_S     Signed comparison
;   Parameters:
;       %1:     Operand 1
;       %2:     Operand 2
;   Returns:
;       %1:     Lesser operand
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
%macro MIN_U 2
    cmp     %1, %2              ; Is %1 smaller?
    jb      %%Return            ;  If so, return
    mov     %1, %2              ; Copy %2 to %1
ALIGN JUMP_ALIGN
%%Return:
%endmacro

%macro MIN_S 2
    cmp     %1, %2              ; Is %1 smaller?
    jl      %%Return            ;  If so, return
    mov     %1, %2              ; Copy %2 to %1
ALIGN JUMP_ALIGN
%%Return:
%endmacro


;--------------------------------------------------------------------
; MAX_U     Unsigned comparison
; MAX_S     Signed comparison
;   Parameters:
;       %1:     Operand 1
;       %2:     Operand 2
;   Returns:
;       %1:     Lesser operand
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
%macro MAX_U 2
    cmp     %1, %2              ; Is %1 greater?
    ja      %%Return            ;  If so, return
    mov     %1, %2              ; Copy %2 to %1
ALIGN JUMP_ALIGN
%%Return:
%endmacro

%macro MAX_S 2
    cmp     %1, %2              ; Is %1 greater?
    jg      %%Return            ;  If so, return
    mov     %1, %2              ; Copy %2 to %1
ALIGN JUMP_ALIGN
%%Return:
%endmacro


%endif ; MATH_INC