*-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*
*                              *
* MATH.MAC                     *
*                              *
* AUTHOR:  NATHAN RIGGS        *
* CONTACT: NATHAN.RIGGS@       *
*          OUTLOOK.COM         *
*                              *
* VERSION:   0.2.0             *
* DATE:      12-DEC-2018       *
* ASSEMBLER: MERLIN 8 PRO      *
* LICENSE:   APACHE 2.0        *
* OS:        DOS 3.3           *
*                              *
*------------------------------*
*                              *
* THIS IS A MACRO LIBRARY FOR  *
* MATH8.LIB AND MATH16.LIB     *
*                              *
*------------------------------*
*                              *
* LIST OF MACROS               *
*                              *
* ADD16 : 16BIT ADD            *
* SUB16 : 16BIT SUBTRACT       *
* MUL16 : 16BIT MULTIPLY       *
* DIV16 : 16BIT DIVIDE         *
* REM16 : 16BIT REMAINDER      *
* RND8 : RANDOM # 0..255       *
* RNDB : RANDOM # LOW..HIGH    *
* CMP16 : 16BIT COMPARE        *
* RND16 : 16BIT RANDOM #       *
* RNDW : RANDOM WORD LOW..HI   *
* MUL8 : 8BIT MULTIPLY         *
* DIV8 : 8BIT DIVIDE, REMAIND  *
*                              *
*-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*
*
*``````````````````````````````*
* ADD16 ::     16-BIT ADDITION *
*-                            -*
* ADD TWO 16BIT VALUES, STORE  *
* RESULT IN Y, X (LOW, HIGH)   *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = ADDEND 1                *
* ]2 = ADDEND 2                *
* ]3 = INDIRECT MEM FLAG       *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  ADD16 #3000;#4000           *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
ADD16    MAC
         _ISLIT ]1
         _ISLIT ]2
         JSR   ADDIT16
         <<<
*
*``````````````````````````````*
* SUB16 ::  16-BIT SUBTRACTION *
*-                            -*
* SUBTRACTS ONE 16BIT INTEGER  *
* FROM ANOTHER, STORING THE    *
* RESULT IN Y,X (LOW, HIGH)    *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = MINUEND                 *
* ]2 = SUBTRAHEND              *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  SUB16 #2000;#1500           *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
SUB16    MAC
         _ISLIT ]1
         _ISLIT ]2
         JSR   SUBT16
         <<<
*
*``````````````````````````````*
* MUL16 ::     16-BIT MULTIPLY *
*-                            -*
* MULTIPLIES TWO 16BIT NUMBERS *
* AND RETURNS THE PRODUCT IN   *
* Y,X (LOW, HIGH).             *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = MULTIPLICAND            *
* ]2 = MULTIPLIER              *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  MUL16 #400;#500             *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
MUL16    MAC
         _ISLIT ]1
         _ISLIT ]2
         JSR   MULT16
         <<<
*
*``````````````````````````````*
* DIV16 ::     16-BIT DIVISION *
*-                            -*
* DIVIDES ONE 16BIT NUMBER BY  *
* ANOTHER AND RETURNS THE      *
* RESULT IN Y,X (LOW,HIGH).    *
*                              *
* IF THE THIRD PARAMETER IS    *
* PASSED WITH A S, VALUES WILL *
* BE TREATED AS SIGNED; IF     *
* NOT, VALUES WILL BE TREATED  *
* AS UNSIGNED.                 *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = DIVIDEND                *
* ]2 = DIVISOR                 *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  DIV16 #3000;#300            *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
DIV16    MAC
         _ISLIT ]1
         _ISLIT ]2
         IF    S,]3       ; SIGNED
         JSR   SDIVD16
         ELSE
         JSR   UDIVD16    ; UNSIGNED
         FIN
         <<<
*
*``````````````````````````````*
* REM16 ::  16-BIT DIV REMAINR *
*-                            -*
* DIVIDES ONE INTEGER BY       *
* ANOTHER AND RETURNS THE      *
* REMAINDER IN Y,X (LOW, HIGH) *
*                              *
* IF THE THIRD PARAMETER IS    *
* PASSED WITH A S, VALUES WILL *
* BE TREATED AS SIGNED; IF     *
* NOT, VALUES WILL BE TREATED  *
* AS UNSIGNED.                 *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = DIVIDEND                *
* ]2 = DIVISOR                 *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  REM16 #1000;#333            *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
REM16    MAC
         _ISLIT ]1
         _ISLIT ]2
         IF    S,]3       ; SIGNED
         JSR   SREMD16
         ELSE
         JSR   UREMD16    ; UNSIGNED
         FIN
         <<<
*
*``````````````````````````````*
* RNDB ::   8BIT RANDOM LOW,HI *
*-                            -*
* RETURNS A RANDOM NUMBER IN   *
* REGISTER A THAT IS BETWEEN   *
* THE LOW AND HIGH BOUNDARIES  *
* PASSED IN THE PARAMETERS.    *
*                              *
* NOTE THAT THIS RETURNS A     *
* BYTE, AND THUS ONLY DEALS    *
* WITH VALUES BETWEEN 0..255.  *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = LOW BOUNDARY            *
* ]2 = HIGH BOUNDARY           *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  RNDB #50;#100               *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
RNDB     MAC
         LDA   ]1         ; LOW
         PHA
         LDA   ]2         ; HIGH
         PHA
         JSR   RANDB
         <<<
*
*``````````````````````````````*
* CMP16 :     16BIT COMPARISON *
*-                            -*
* COMPARES TWO 16BIT VALUES    *
* AND ALTERS THE P-REGISTER    *
* ACCORDINGLY (FLAGS).         *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = WORD 1 TO COMPARE       *
* ]2 = WORD 2 TO COMPARE       *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  CMP16 #1023;#3021           *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
CMP16    MAC
         _ISLIT ]1
         _ISLIT ]2
         JSR   COMP16
         <<<
*
*``````````````````````````````*
* MUL8 ::  8BIT MULTIPLICATION *
*-                            -*
* MULTIPLIES TWO 8BIT VALUES   *
* AND RETURNS A 16BIT RESULT   *
* IN Y,X (LOW, HIGH).          *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = MULTIPLICAND            *
* ]2 = MULTIPLIER              *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  MUL8 #10;#20                *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
MUL8     MAC
         LDA   ]1
         PHA
         LDA   ]2
         PHA
         JSR   MULT8
         <<<
*
*``````````````````````````````*
* DIV8 ::  8BIT MULTIPLICATION *
*-                            -*
* DIVIDES ONE 8BIT NUMBER BY   *
* ANOTHER AND STORES THE       *
* QUOTIENT IN A WITH THE       *
* REMAINDER IN X.              *
*-                            -*
* PARAMETERS:                  *
*                              *
* ]1 = DIVIDEND                *
* ]2 = DIVISOR                 *
*-                            -*
* SAMPLE USAGE:                *
*                              *
*  DIV8 #100;#10               *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
DIV8     MAC
         LDA   ]1
         PHA
         LDA   ]2
         PHA
         JSR   DIVD8
         <<<
*
*``````````````````````````````*
* RND16 ::  RANDOM 16-BIT NUM  *
*-                            -*
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
RND16    MAC
         JSR   RAND16
         <<<
*
*``````````````````````````````*
* FPADD :: FLOATING POINT ADD  *
*-                            -*
* ADD TWO FLOATING-POINT NUMS  *
* STORED IN GIVEN ADDRESSES    *
* AND STORE RESULT IN [RETURN] *
*-                            -*
* USAGE: FPADD $300;$310       *
*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
*
FPADD    MAC
         LDX   #]1
         LDY   #>]1
         JSR   MOVFM
*
         LDA   #]2
         LDY   #>]2
         JSR   CONUPK
         JSR   NORM
         LDA   $9D
         JSR   FADDT
*
         LDX   #RETURN
         LDY   #>RETURN
         JSR   MOVMF
*
         LDA   #6
         STA   RETLEN
*
         <<<