CydandClaude Fable 5
63312e07f9
- BORLAND/: Borland C++ 4.52 (chosen over 4.5 by byte-match: CODE/RP/CW32.LIB
is identical to 4.52's install lib). BCC32/TLINK32/TLIB/MAKE run natively on
Win11; CODE/BT/OPT.MAK is the shipped BTL4OPT.EXE's exact flag recipe
(extender = Borland PowerPack DPMI32, not Phar Lap TNT).
- restoration/source410/: the literal 1995-form reconstruction of the missing
BT game source (never mixed into CODE/). Round 1-3 state:
* 6 of 10 surviving original TUs COMPILE CLEAN under the period toolchain
(BTMSSN, BTCNSL, BTSCNRL, BTTEAM, BTL4MODE, BTL4ARND) - first builds
since 1996.
* BT_L4/BTL4APP.CPP pilot reconstruction: 12/12 functions, Fail() lands on
its binary-recorded line 400 exactly.
* BT/BTCNSL.HPP: console wire IDs recovered from the binary's ctors
(Killed=9, Damaged=10, ScoreUpdate=13, DeathWithoutHonor=15 [T1];
TeamScore=12 flagged [T4]).
* MUNGA/: 8 engine-header backfills back-dated from the BT412 WinTesla tree
(VDATA numbering decomp-verified; AUDREND's OpenAL-era virtual removed -
the period compiler is the drift detector).
* Tooling: backdate.py (WinTesla->1995 header transform), compile410.sh
(per-TU verification sweep under authentic OPT.MAK flags).
* README: corrected roadmap - MECH.HPP is the capstone grown with the mech
TU reconstructions; BTREG.CPP green = the header-family milestone.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
92 lines
2.2 KiB
Plaintext
92 lines
2.2 KiB
Plaintext
/*------------------------------------------------------------------------
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* filename - ldexp.cas
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*
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* function(s)
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* ldexp - calculates value * 2^exp
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*-----------------------------------------------------------------------*/
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/*
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* C/C++ Run Time Library - Version 6.5
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*
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* Copyright (c) 1987, 1994 by Borland International
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* All Rights Reserved.
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*
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*/
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#pragma inline
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#include <asmrules.h>
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#include <_math.h>
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#include <math.h>
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#include <errno.h>
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/*--------------------------------------------------------------------------*
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Name ldexp - calculates value * 2^exp
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Usage double ldexp(double value, int exp);
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Prototype in math.h
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Description ldexp calculates value * 2^exp
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Return value ldexp returns value * 2^exp
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Overflows return HUGE_VAL * sign(value), underflows return 0.0,
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in both cases with errno set to ERANGE.
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*---------------------------------------------------------------------------*/
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double _FARFUNC ldexp (double value, int scale)
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{
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double yVal; /* used in error exits */
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asm FILD W0 (scale)
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/*
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While that is loading, we should check for range error.
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*/
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asm mov ax, 7FF0h
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asm and ax, value [6]
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asm mov cl, 4
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asm ror ax, cl
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asm FLD DOUBLE (value)
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asm jz ldx_zero
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asm mov bx, scale
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asm cmp bh, 7h
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asm jg ldx_overflow
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asm cmp bh, -7h
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asm jl ldx_overflow
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asm add ax, bx
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asm jng ldx_underflow
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asm cmp ax, 7FFh
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asm jnl ldx_overflow
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asm FSCALE
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ldx_zero:
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asm FSTP st(1) /* remove the scale from the stack */
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ldx_end:
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#pragma noretval
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return;
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ldx_overflow:
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asm mov si, OVERFLOW
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asm jmp short ldx_err
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ldx_underflow:
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asm mov si, UNDERFLOW
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ldx_err:
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asm FSTP st(0) /* pop value from stack */
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asm FSTP DOUBLE (yVal) /* yVal = scale */
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#pragma warn -ret
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return __matherr (_SI, "ldexp", &value, &yVal,
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(OVERFLOW == _SI) ? HUGE_VAL : 0.0);
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#pragma warn .ret
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}
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