DIRECTORY Basics USING [BITAND, LongNumber], PrincOps USING [alpha, aFSTICKY, zMISC], Real USING [ExceptionFlags, Extended, NumberType], RealOps USING [Mode, RoundingMode]; Ieee: CEDAR DEFINITIONS IMPORTS Basics = BEGIN OPEN Real, RealOps; LongNumber: TYPE = Basics.LongNumber; SingleReal: TYPE = MACHINE DEPENDENT RECORD [ m2: CARDINAL, sign: BOOL, exp: [0..377B], m1: [0..177B]]; Details: TYPE = MACHINE DEPENDENT RECORD [ sign: BOOL, sticky: BOOL, blank: [0..7777B], type: Real.NumberType]; Ext: TYPE = RECORD [det: Details, exp: INTEGER, frac: LongNumber]; HiBit: CARDINAL = 100000B; NotHiBit: CARDINAL = 077777B; ExponentBias: INTEGER = 127; ExponentMask: INTEGER = 077600B; ExponentShift: INTEGER = 7; HiFractionMask: INTEGER = 177B; LowSignificandMask: CARDINAL = 177400B; FractionShift: INTEGER = 8; LeastSignificandBit: INTEGER = 0400B; HiddenBit: CARDINAL = 100000B; StickyBits: CARDINAL = 77B; NotStickyBits: CARDINAL = 177700B; MagicLI: LONG INTEGER = LOOPHOLE[20000000000B]; HalfLC: LONG CARDINAL = LOOPHOLE[20000000000B]; MagicI: INTEGER = FIRST[INTEGER]; SignBit: CARDINAL = 100000B; ExpSingleMax: INTEGER = 127; ExpSingleMin: INTEGER = -126; DenormalizedExponent: INTEGER = -127; NaNExponent: INTEGER = 128; LargestSignificand: LONG CARDINAL = 37777777400B; BiasAdjust: INTEGER = 192; fpmode: RealOps.Mode; stickyFlags: ExceptionFlags; thisTimeExceptions: ExceptionFlags; BitOn: PROC [a, b: WORD] RETURNS [BOOL] = INLINE { RETURN[Basics.BITAND[LOOPHOLE[a], LOOPHOLE[b]] # 0]; }; Normalized: PROC [g: INTEGER] RETURNS [BOOL] = INLINE { RETURN[Basics.BITAND[g, HiddenBit] # 0]; }; ADC3: PROC [a, b, c: CARDINAL] RETURNS [CARDINAL, CARDINAL] = INLINE { s: LongNumber; s.lc _ LONG[a] + LONG[b] + LONG[c]; RETURN[s.highbits, s.lowbits]; }; ADC2: PROC [a, b: CARDINAL] RETURNS [CARDINAL, CARDINAL] = INLINE { s: LongNumber; s.lc _ LONG[a] + LONG[b]; RETURN[s.highbits, s.lowbits]; }; Unpack: PROC [REAL] RETURNS [Ext]; Pack: PROC [POINTER TO Ext] RETURNS [REAL]; Round: PROC [POINTER TO Ext]; StepTwo: PROC [POINTER TO Ext]; GRS: PROC [g: INTEGER] RETURNS [INTEGER]; PostNormalize: PROC [POINTER TO Ext]; LongShift: PROC [z: LongNumber, count: INTEGER] RETURNS [LongNumber]; RShift: PROC [z: LongNumber] RETURNS [LongNumber]; LShift: PROC [z: LongNumber] RETURNS [LongNumber]; RShift1in1: PROC [z: LongNumber] RETURNS [LongNumber]; DeNormalize: PROC [z: POINTER TO Ext, count: INTEGER]; Mul32: PROC [x, y: LongNumber] RETURNS [LongNumber, LongNumber]; FixExtended: PUBLIC PROC [z: Ext, rmode: RoundingMode] RETURNS [v: LONG INTEGER, invalid, overflow: BOOL]; SetInexactResult: PROC; SetInvalidOperation: PROC; SetDivisionByZero: PROC; SetUnderflow: PROC [POINTER TO Ext]; SetOverflow: PROC [POINTER TO Ext]; SetFixOverflow: PROC; CVExtended: PROC [Ext] RETURNS [Real.Extended]; CFExtended: PROC [zz: REF Extended, z: POINTER TO Ext]; NormalType: PROC [x, y: Details] RETURNS [INTEGER]; MicroStickySet: PROC; IResultSticky: CARDINAL = 1; IResultEnable: CARDINAL = 100000B; MicroSticky: PROC [CARDINAL] RETURNS [CARDINAL] = TRUSTED MACHINE CODE { PrincOps.zMISC, PrincOps.aFSTICKY; }; InitIeee: PROC; Microcode: BOOL = TRUE; -- DKW: moved here from Real funny: INTEGER = 02B; TNnn: INTEGER = 00B; TNnz: INTEGER = 01B; TNzn: INTEGER = 02B; TNzz: INTEGER = 03B; END. L. Stewart, July 6, 1980 12:28 PM, Added InitIeee L. Stewart, July 6, 1980 4:15 PM, Added microcode sticky bit stuff September 28, 1980 9:10 PM; Stewart, Added aSETS June 3, 1982 11:09 am; Stewart, removed aSETS, what was it for? ΦIeee.mesa Copyright c 1985 by Xerox Corporation. All rights reserved. Stewart August 27, 1982 11:10 am Rovner May 4, 1983 9:39 am Levin, August 8, 1983 4:24 pm Russ Atkinson (RRA) February 19, 1985 4:14:34 pm PST Doug Wyatt (DKW), February 25, 1985 3:26:53 pm PST Internal details of the IEEE floating-point implementation. constants global variables other stuff Add with Carry Add two shorts to make a long Separate the packed REAL into its component elements Κ*˜codešœ ™ Kšœ Οmœ1™