Representation of Floating Point Numbers in Single Precision ...
Representation of Floating Point Numbers in Single Precision ...
Representation of Floating Point Numbers in Single Precision ...
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* ARG1 > ARG2<br />
FPATLT CMP.B #-24,D5 ? ARG1 >> ARG2<br />
BLE.S FPART1 RETURN IT IF SO<br />
NEG.B D5 ABSOLUTIZE DIFFERENCE<br />
MOVE.L D7,D3 MOVE ARG2 AS LOWER VALUE<br />
MOVE.L D6,D7 SETUP ARG1 AS HIGH<br />
MOVE.B #$80,D7 SETUP ROUNDING BIT<br />
BRA.S FPAMSS PERFORM THE ADDITION<br />
* EQUAL MAGNITUDES<br />
FPAEQ MOVE.B D7,D5 SAVE ARG1 SIGN<br />
EXG.L D5,D4<br />
MOVE.B D6,D7<br />
SUB.L D6,D7<br />
SWAP ARG2 WITH ARG1 S+EXP<br />
INSURE SAME LOW BYTE<br />
OBTAIN DIFFERENCE<br />
BEQ.S FPAZRO RETURN ZERO IF IDENTICAL<br />
BPL.S FPANOR BRANCH IF ARG2 BIGGER<br />
NEG.L D7 CORRECT DIFFERENCE TO POSITIVE<br />
MOVE.B D5,D4<br />
USE ARG2'S SIGN+EXPONENT<br />
BRA.S FPANRM AND GO NORMALIZE<br />
END<br />
* (C) COPYRIGHT 1980 BY MOTOROLA INC. *<br />
EECC250 - Shaaban<br />
#28 lec #17 W<strong>in</strong>ter99 1-27-2000
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