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Support 1, 2, 4 and 8 byte hex constant sign extension.

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This commit is contained in:
dcwbrown 2019-01-13 19:47:26 +00:00
parent e3a07e77fa
commit 9a18b4c688
1 changed files with 13 additions and 1 deletions
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14
src/compiler/OPS.Mod Normal file → Executable file
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@ -111,6 +111,11 @@ MODULE OPS; (* NW, RC 6.3.89 / 18.10.92 *) (* object model 3.6.92 *)
END
END Ord;
PROCEDURE HexExtend(neg: SYSTEM.INT64); (* Sign extend values from neg to 2*neg *)
BEGIN OPM.Get(ch);
IF (intval >= neg) & (intval < 2*neg) THEN DEC(intval, 2*neg) END
END HexExtend;
BEGIN (* ("0" <= ch) & (ch <= "9") *)
i := 0; m := 0; n := 0; d := 0;
LOOP (* read mantissa *)
@ -138,7 +143,14 @@ MODULE OPS; (* NW, RC 6.3.89 / 18.10.92 *) (* object model 3.6.92 *)
ELSIF ch = "H" THEN (* hexadecimal *) OPM.Get(ch); numtyp := integer;
IF n <= maxhexdigits THEN
IF (n = maxhexdigits) & (dig[0] > "7") THEN (* prevent overflow *) intval := -1 END;
WHILE i < n DO intval := intval*10H + Ord(dig[i], TRUE); INC(i) END
WHILE i < n DO intval := intval*10H + Ord(dig[i], TRUE); INC(i) END;
CASE ch OF
|"1": HexExtend(80H)
|"2": HexExtend(8000H)
|"4": HexExtend(80000000H)
|"8": HexExtend(8000000000000000H)
ELSE
END
ELSE err(203)
END
ELSE (* decimal *) numtyp := integer;