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@@ -588,7 +588,7 @@ Instructions that check for undefined integer or floating-point
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values and underflow or overflow
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are indicated below by (*).
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.N 1
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-.DS B
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+.DS
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.ta 12n
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GROUP 1 \- LOAD
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@@ -608,7 +608,9 @@ GROUP 1 \- LOAD
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LDE \*g : Load double external (two consecutive externals are stacked)
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LDF \*f : Load double offsetted (top of stack + \*f yield address)
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LPI \*p : Load procedure identifier
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+.DE
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+.DS
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GROUP 2 \- STORE
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STL \*l : Store local or parameter
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@@ -620,7 +622,9 @@ GROUP 2 \- STORE
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SDL \*l : Store double local or parameter
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SDE \*g : Store double external
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SDF \*f : Store double offsetted
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+.DE
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+.DS
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GROUP 3 \- INTEGER ARITHMETIC
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ADI \*w : Addition (*)
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@@ -631,7 +635,9 @@ GROUP 3 \- INTEGER ARITHMETIC
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NGI \*w : Negate (two's complement) (*)
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SLI \*w : Shift left (*)
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SRI \*w : Shift right (*)
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+.DE
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+.DS
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GROUP 4 \- UNSIGNED ARITHMETIC
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ADU \*w : Addition
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@@ -641,7 +647,9 @@ GROUP 4 \- UNSIGNED ARITHMETIC
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RMU \*w : Remainder
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SLU \*w : Shift left
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SRU \*w : Shift right
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+.DE
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+.DS
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GROUP 5 \- FLOATING POINT ARITHMETIC
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ADF \*w : Floating add (*)
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@@ -651,13 +659,17 @@ GROUP 5 \- FLOATING POINT ARITHMETIC
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NGF \*w : Floating negate (*)
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FIF \*w : Floating multiply and split integer and fraction part (*)
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FEF \*w : Split floating number in exponent and fraction part (*)
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+.DE
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+.DS
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GROUP 6 \- POINTER ARITHMETIC
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ADP \*f : Add \*f to pointer on top of stack
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ADS \*w : Add \*w-byte value and pointer
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SBS \*w : Subtract pointers in same fragment and push diff as size \*w integer
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+.DE
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+.DS
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GROUP 7 \- INCREMENT/DECREMENT/ZERO
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INC \*- : Increment word on top of stack by 1 (*)
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@@ -670,7 +682,9 @@ GROUP 7 \- INCREMENT/DECREMENT/ZERO
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ZRE \*g : Zero external
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ZRF \*w : Load a floating zero of size \*w
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ZER \*w : Load \*w zero bytes
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+.DE
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+.DS \" ???
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GROUP 8 \- CONVERT (stack: source, source size, dest. size (top))
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CII \*- : Convert integer to integer (*)
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@@ -682,7 +696,9 @@ GROUP 8 \- CONVERT (stack: source, source size, dest. size (top))
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CIU \*- : Convert integer to unsigned
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CUU \*- : Convert unsigned to unsigned
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CFU \*- : Convert floating to unsigned
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+.DE
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+.DS
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GROUP 9 \- LOGICAL
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AND \*w : Boolean and on two groups of \*w bytes
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@@ -691,18 +707,24 @@ GROUP 9 \- LOGICAL
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COM \*w : Complement (one's complement of top \*w bytes)
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ROL \*w : Rotate left a group of \*w bytes
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ROR \*w : Rotate right a group of \*w bytes
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+.DE
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+.DS
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GROUP 10 \- SETS
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INN \*w : Bit test on \*w byte set (bit number on top of stack)
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SET \*w : Create singleton \*w byte set with bit n on (n is top of stack)
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+.DE
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+.DS
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GROUP 11 \- ARRAY
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LAR \*w : Load array element, descriptor contains integers of size \*w
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SAR \*w : Store array element
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AAR \*w : Load address of array element
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+.DE
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+.DS
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GROUP 12 \- COMPARE
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CMI \*w : Compare \*w byte integers, Push negative, zero, positive for <, = or >
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@@ -717,7 +739,9 @@ GROUP 12 \- COMPARE
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TNE \*- : True if not equal, i.e. iff top of stack non zero
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TGE \*- : True if greater or equal, i.e. iff top of stack >= 0
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TGT \*- : True if greater, i.e. iff top of stack > 0
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+.DE
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+.DS \" ???
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GROUP 13 \- BRANCH
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BRA \*b : Branch unconditionally to label \*b
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@@ -735,14 +759,18 @@ GROUP 13 \- BRANCH
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ZNE \*b : Branch not zero
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ZGE \*b : Branch greater or equal zero
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ZGT \*b : Branch greater than zero
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+.DE
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+.DS
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GROUP 14 \- PROCEDURE CALL
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CAI \*- : Call procedure (procedure identifier on stack)
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CAL \*p : Call procedure (with identifier \*p)
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LFR \*s : Load function result
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RET \*z : Return (function result consists of top \*z bytes)
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+.DE
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+.DS
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GROUP 15 \- MISCELLANEOUS
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ASP \*f : Adjust the stack pointer by \*f
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