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cmpsc.c
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cmpsc.c
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/* CMPSC.C (c) Bernard van der Helm, 2000-2012 */
/* S/390 compression call instruction */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/*----------------------------------------------------------------------------*/
/* file: cmpsc.c */
/* */
/* Implementation of the S/390 compression call instruction described in */
/* SA22-7208-01: Data Compression within the Hercules S/390 emulator. */
/* This implementation couldn't be done without the test programs from */
/* Mario Bezzi. Thanks Mario! Also special thanks to Greg Smith who */
/* introduced iregs, needed when a page fault occurs. */
/* */
/* Implemented copyrighted features */
/* - Expanding index symbol caching */
/* - Compression dead end elimination */
/* - 8 index symbol fetching */
/* - 8 index symbol store */
/* */
/* (c) Copyright Bernard van der Helm, 2000-2012 */
/* Noordwijkerhout, The Netherlands. */
/* */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/* Compression optimalization */
/* */
/* Dead end determination */
/* Whenever a next character does not match any child in the character */
/* entry and possible sibling descriptors, it is a dead end. This dead */
/* combination is administrated in dea and tested before every start */
/* of finding a index symbol. This prevents many fetches. For example: */
/* */
/* HHC90318D fetch_ch : 01 at 000000001DDDC00F */
/* HHC90318D fetch_ch : C1 at 000000001DDDC010 */
/* HHC90316D fetch_cce: index 0001 */
/* HHC90319D cce : DF042A001C47500C */
/* HHC90320D cct : 6 */
/* HHC90327D x1..x5 : 11111 */
/* HHC90328D y1..y2 : 00 */
/* HHC90329D d : False */
/* HHC90325D cptr : 042A */
/* HHC90331D ccs : 00 1C 47 50 0C */
/* HHC90318D fetch_ch : C1 at 000000001DDDC010 */
/* HHC90339D fetch_sd1: index 042F */
/* HHC90332D sd1 : FBAF40580DD0F07041D3C514C3DD0F5A */
/* HHC90333D sct : 15 */
/* HHC90334D y1..y12: 101110101111 */
/* HHC90335D sc(s) : 40 58 0D D0 F0 70 41 D3 C5 14 C3 DD 0F 5A */
/* HHC90339D fetch_sd1: index 043E */
/* HHC90332D sd1 : E4888006120530011E4A549E42D15734 */
/* HHC90333D sct : 14 */
/* HHC90334D y1..y12: 010010001000 */
/* HHC90335D sc(s) : 80 06 12 05 30 01 1E 4A 54 9E 42 D1 57 34 */
/* HHC90365D dead_end : 01 C1 found */
/* */
/* The above dead end is found after fetching a character entry and 2 */
/* sibling entries. These fetches are saved on encountering a 01 C1 */
/* combination. */
/* */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/* Expansion optimalization */
/* */
/* Caching */
/* Every index symbol is cached after determination. This cache is used */
/* on every second appearance of that index symbol. This saves many fetches */
/* of character entries. For expample: */
/* */
/* HHC90349D fetch_ece: index 105F */
/* HHC90353D ece : B05A384040000104 */
/* HHC90354D psl : 5 */
/* HHC90355D pptr : 105A */
/* HHC90356D ecs : 38 40 40 00 01 */
/* HHC90357D ofst : 04 */
/* HHC90349D fetch_ece: index 105A */
/* HHC90353D ece : 0458404000000000 */
/* HHC90354D psl : 0 */
/* HHC90358D bit34 : False */
/* HHC90359D csl : 4 */
/* HHC90356D ecs : 58 40 40 00 */
/* */
/* The above index symbol 105F, meaning 584040003840400001 is cached and */
/* used after every next appearance. */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/* Common optimalization */
/* */
/* 8 index symbol block processing */
/* Calculating the cbn after placing or reading an index symbol is heavy. */
/* This implementation uses blocks of 8 index symbols. These 8 symbols fit */
/* in 9, 10, 11, 12 or 13 bytes and the cbn stays unchanged. */
/*----------------------------------------------------------------------------*/
#include "hstdinc.h"
#ifndef _HENGINE_DLL_
#define _HENGINE_DLL_
#endif /* #ifndef _HENGINE_DLL_ */
#ifndef _CMPSC_C_
#define _CMPSC_C_
#endif /* #ifndef _CMPSC_C_ */
#if !defined( NOT_HERC ) // (building Hercules?)
#include "hercules.h"
#include "opcode.h"
#include "inline.h"
#else // (building utility)
#define compression_call legacy_cmpsc
#endif
#ifdef FEATURE_COMPRESSION
/*============================================================================*/
/* Common */
/*============================================================================*/
/*----------------------------------------------------------------------------*/
/* Debugging options: */
/*----------------------------------------------------------------------------*/
#if 0
#define OPTION_CMPSC_DEBUG
#define TRUEFALSE(boolean) ((boolean) ? "True" : "False")
#endif /* #if 0|1 */
/*----------------------------------------------------------------------------*/
/* After a succesful compression of characters to an index symbol or a */
/* succsful translation of an index symbol to characters, the registers must */
/* be updated. */
/*----------------------------------------------------------------------------*/
#define ADJUSTREGS(r, regs, iregs, len) \
{ \
SET_GR_A((r), (iregs), (GR_A((r), (iregs)) + (len)) & ADDRESS_MAXWRAP((regs))); \
SET_GR_A((r) + 1, (iregs), GR_A((r) + 1, (iregs)) - (len)); \
}
/*----------------------------------------------------------------------------*/
/* Commit intermediate register */
/*----------------------------------------------------------------------------*/
#ifdef OPTION_CMPSC_DEBUG
#define COMMITREGS(regs, iregs, r1, r2) \
__COMMITREGS((regs), (iregs), (r1), (r2)) \
WRMSG(HHC90312, "D");
#else
#define COMMITREGS(regs, iregs, r1, r2) \
__COMMITREGS((regs), (iregs), (r1), (r2))
#endif /* ifdef OPTION_CMPSC_DEBUG */
#define __COMMITREGS(regs, iregs, r1, r2) \
{ \
SET_GR_A(1, (regs), GR_A(1, (iregs))); \
SET_GR_A((r1), (regs), GR_A((r1), (iregs))); \
SET_GR_A((r1) + 1, (regs), GR_A((r1) + 1, (iregs))); \
SET_GR_A((r2), (regs), GR_A((r2), (iregs))); \
SET_GR_A((r2) + 1, (regs), GR_A((r2) + 1, (iregs))); \
}
/*----------------------------------------------------------------------------*/
/* Commit intermediate register, except for GR1 */
/*----------------------------------------------------------------------------*/
#ifdef OPTION_CMPSC_DEBUG
#define COMMITREGS2(regs, iregs, r1, r2) \
__COMMITREGS2((regs), (iregs), (r1), (r2)) \
WRMSG(HHC90312, "D");
#else
#define COMMITREGS2(regs, iregs, r1, r2) \
__COMMITREGS2((regs), (iregs), (r1), (r2))
#endif /* #ifdef OPTION_CMPSC_DEBUG */
#define __COMMITREGS2(regs, iregs, r1, r2) \
{ \
SET_GR_A((r1), (regs), GR_A((r1), (iregs))); \
SET_GR_A((r1) + 1, (regs), GR_A((r1) + 1, (iregs))); \
SET_GR_A((r2), (regs), GR_A((r2), (iregs))); \
SET_GR_A((r2) + 1, (regs), GR_A((r2) + 1, (iregs))); \
}
/*----------------------------------------------------------------------------*/
/* Initialize intermediate registers */
/*----------------------------------------------------------------------------*/
#define INITREGS(iregs, regs, r1, r2) \
{ \
(iregs)->gr[1] = (regs)->gr[1]; \
(iregs)->gr[(r1)] = (regs)->gr[(r1)]; \
(iregs)->gr[(r1) + 1] = (regs)->gr[(r1) + 1]; \
(iregs)->gr[(r2)] = (regs)->gr[(r2)]; \
(iregs)->gr[(r2) + 1] = (regs)->gr[(r2) + 1]; \
}
#if __GEN_ARCH == 900
#undef INITREGS
#define INITREGS(iregs, regs, r1, r2) \
{ \
(iregs)->gr[1] = (regs)->gr[1]; \
(iregs)->gr[(r1)] = (regs)->gr[(r1)]; \
(iregs)->gr[(r1) + 1] = (regs)->gr[(r1) + 1]; \
(iregs)->gr[(r2)] = (regs)->gr[(r2)]; \
(iregs)->gr[(r2) + 1] = (regs)->gr[(r2) + 1]; \
(iregs)->psw.amode64 = (regs)->psw.amode64; \
}
#endif /* #if __GEN_ARCH == 900 */
/*----------------------------------------------------------------------------*/
/* General Purpose Register 0 macro's (GR0) */
/*----------------------------------------------------------------------------*/
/* cdss : compressed-data symbol size */
/* e : expansion operation */
/* f1 : format-1 sibling descriptors */
/* st : symbol-translation option */
/* zp : zero padding */
/*----------------------------------------------------------------------------*/
#define GR0_cdss(regs) (((regs)->GR_L(0) & 0x0000F000) >> 12)
#define GR0_e(regs) ((regs)->GR_L(0) & 0x00000100)
#define GR0_f1(regs) ((regs)->GR_L(0) & 0x00000200)
#define GR0_st(regs) ((regs)->GR_L(0) & 0x00010000)
#define GR0_zp(regs) ((regs)->GR_L(0) & 0x00020000)
/*----------------------------------------------------------------------------*/
/* General Purpose Register 0 macro's (GR0) derived */
/*----------------------------------------------------------------------------*/
/* dcten : # dictionary entries */
/* dctsz : dictionary size */
/* smbsz : symbol size */
/*----------------------------------------------------------------------------*/
#define GR0_dcten(regs) (0x100 << GR0_cdss(regs))
#define GR0_dctsz(regs) (0x800 << GR0_cdss((regs)))
#define GR0_smbsz(regs) (GR0_cdss((regs)) + 8)
/*----------------------------------------------------------------------------*/
/* General Purpose Register 1 macro's (GR1) */
/*----------------------------------------------------------------------------*/
/* cbn : compressed-data bit number */
/* dictor: compression dictionary or expansion dictionary */
/* sttoff: symbol-translation-table offset */
/*----------------------------------------------------------------------------*/
#define GR1_cbn(regs) (((regs)->GR_L(1) & 0x00000007))
#define GR1_dictor(regs) (GR_A(1, regs) & ((GREG) 0xFFFFFFFFFFFFF000ULL))
#define GR1_sttoff(regs) (((regs)->GR_L(1) & 0x00000FF8) << 4)
/*----------------------------------------------------------------------------*/
/* Sets the compressed bit number in GR1 */
/*----------------------------------------------------------------------------*/
#define GR1_setcbn(regs, cbn) ((regs)->GR_L(1) = ((regs)->GR_L(1) & 0xFFFFFFF8) | ((cbn) & 0x00000007))
/*----------------------------------------------------------------------------*/
/* Constants */
/*----------------------------------------------------------------------------*/
#define MINPROC_SIZE 32768 /* Minumum processing size */
/*----------------------------------------------------------------------------*/
/* Typedefs and prototypes */
/*----------------------------------------------------------------------------*/
#ifndef NO_2ND_COMPILE
struct cc /* Compress context */
{
BYTE *cce; /* Character entry under investigation */
unsigned dctsz; /* Dictionary size */
BYTE dea[0x100][0x100]; /* Dead end administration */
BYTE dead_end; /* Needed for dead end administration */
BYTE *dest; /* Destination MADDR address */
BYTE *dict[32]; /* Dictionary MADDR addresses */
GREG dictor; /* Dictionary origin */
BYTE *edict[32]; /* Expansion dictionary MADDR addrs */
int f1; /* Indication format-1 sibling descr */
REGS *iregs; /* Intermediate registers */
U16 is[8]; /* Cache for 8 index symbols */
unsigned ofst; /* Latest fetched offset */
int r1; /* Guess what */
int r2; /* Yep */
REGS *regs; /* Registers */
unsigned smbsz; /* Symbol size */
BYTE *src; /* Source MADDR page address */
BYTE st; /* Symbol translation */
};
struct ec /* Expand context */
{
BYTE *dest; /* Destination MADDR page address */
BYTE *dict[32]; /* Dictionary MADDR addresses */
GREG dictor; /* Dictionary origin */
BYTE ec[8192 * 7]; /* Expanded index symbol cache */
int eci[8192]; /* Index within cache for is */
int ecl[8192]; /* Size of expanded is */
int ecwm; /* Water mark */
REGS *iregs; /* Intermediate registers */
BYTE oc[8 * 260]; /* Output cache */
unsigned ocl; /* Output cache length */
int r1; /* Guess what */
int r2; /* Yep */
REGS *regs; /* Registers */
unsigned smbsz; /* Symbol size */
BYTE *src; /* Source MADDR page address */
};
#endif /* #ifndef NO_2ND_COMPILE */
static void ARCH_DEP(compress)(int r1, int r2, REGS *regs, REGS *iregs);
static void ARCH_DEP(expand)(int r1, int r2, REGS *regs, REGS *iregs);
static void ARCH_DEP(expand_is)(struct ec *ec, U16 is);
static BYTE *ARCH_DEP(fetch_cce)(struct cc *cc, unsigned index);
static int ARCH_DEP(fetch_ch)(struct cc *cc, BYTE *ch);
static int ARCH_DEP(fetch_chs_and_adjust)(struct cc *cc, BYTE *ch1, BYTE *ch2);
static int ARCH_DEP(fetch_is)(struct ec *ec, U16 *is);
static void ARCH_DEP(fetch_iss)(struct ec *ec, U16 is[8]);
#ifdef OPTION_CMPSC_DEBUG
static void print_cce(BYTE *cce);
static void print_ece(U16 is, BYTE *ece);
static void print_sd(int f1, BYTE *sd1, BYTE *sd2);
#endif /* #ifdef OPTION_CMPSC_DEBUG */
static int ARCH_DEP(search_cce)(struct cc *cc, BYTE *ch, U16 *is);
static int ARCH_DEP(search_sd)(struct cc *cc, BYTE *ch, U16 *is);
static int ARCH_DEP(store_is)(struct cc *cc, U16 is);
static void ARCH_DEP(store_iss)(struct cc *cc);
static int ARCH_DEP(test_ec)(struct cc *cc, BYTE *cce);
static int ARCH_DEP(vstore)(struct ec *ec, BYTE *buf, unsigned len);
/*----------------------------------------------------------------------------*/
/* B263 CMPSC - Compression Call [RRE] */
/*----------------------------------------------------------------------------*/
DEF_INST(compression_call)
{
REGS iregs; /* Intermediate registers */
int r1; /* Guess what */
int r2; /* Yep */
RRE(inst, regs, r1, r2);
#ifdef OPTION_CMPSC_DEBUG
WRGMSG_ON;
WRGMSG(HHC90300, "D");
WRGMSG(HHC90301, "D", 1, r1);
WRGMSG(HHC90302, "D", regs->GR(r1));
WRGMSG(HHC90303, "D", regs->GR(r1 + 1));
WRGMSG(HHC90301, "D", 2, r2);
WRGMSG(HHC90302, "D", regs->GR(r2));
WRGMSG(HHC90303, "D", regs->GR(r2 + 1));
WRGMSG(HHC90304, "D", 0, regs->GR(0));
WRGMSG(HHC90364, "D", TRUEFALSE(GR0_zp(regs)));
WRGMSG(HHC90305, "D", TRUEFALSE(GR0_st(regs)));
WRGMSG(HHC90306, "D", GR0_cdss(regs));
WRGMSG(HHC90307, "D", TRUEFALSE(GR0_f1(regs)));
WRGMSG(HHC90308, "D", TRUEFALSE(GR0_e(regs)));
WRGMSG(HHC90304, "D", 1, regs->GR(1));
WRGMSG(HHC90309, "D", GR1_dictor(regs));
WRGMSG(HHC90310, "D", GR1_sttoff(regs));
WRGMSG(HHC90311, "D", GR1_cbn(regs));
WRGMSG_OFF;
#endif /* #ifdef OPTION_CMPSC_DEBUG */
/* Check the registers on even-odd pairs and valid compression-data symbol size */
if(unlikely(r1 & 0x01 || r2 & 0x01 || !GR0_cdss(regs) || GR0_cdss(regs) > 5))
ARCH_DEP(program_interrupt)(regs, PGM_SPECIFICATION_EXCEPTION);
/* Check for empty input */
if(unlikely(!GR_A(r2 + 1, regs)))
{
regs->psw.cc = 0;
return;
}
/* Check for empty output */
if(unlikely(!GR_A(r1 + 1, regs)))
{
regs->psw.cc = 1;
return;
}
/* Set possible Data Exception code */
regs->dxc = DXC_DECIMAL;
/* Initialize intermediate registers */
INITREGS(&iregs, regs, r1, r2);
/* Now go to the requested function */
if(likely(GR0_e(regs)))
ARCH_DEP(expand)(r1, r2, regs, &iregs);
else
ARCH_DEP(compress)(r1, r2, regs, &iregs);
}
/*============================================================================*/
/* Compress */
/*============================================================================*/
/*----------------------------------------------------------------------------*/
/* Compression Character Entry macro's (CCE) */
/*----------------------------------------------------------------------------*/
/* act : additional-extension-character count */
/* cct : child count */
/* cptr : child pointer; index of first child */
/* d : double-character entry */
/* x(i) : examine child bit for children 1 to 5 */
/* y(i) : examine child bit for 6th/13th and 7th/14th sibling */
/*----------------------------------------------------------------------------*/
#define CCE_act(cce) ((cce)[1] >> 5)
#define CCE_cct(cce) ((cce)[0] >> 5)
#define CCE_cptr(cce) ((((cce)[1] & 0x1f) << 8) | (cce)[2])
#define CCE_d(cce) ((cce)[1] & 0x20)
#define CCE_x(cce, i) ((cce)[0] & (0x10 >> (i)))
#define CCE_y(cce, i) ((cce)[1] & (0x80 >> (i)))
/*----------------------------------------------------------------------------*/
/* Compression Character Entry macro's (CCE) derived */
/*----------------------------------------------------------------------------*/
/* cc(i) : child character */
/* ccc(i) : indication consecutive child character */
/* ccs : number of child characters */
/* ec(i) : additional extension character */
/* ecs : number of additional extension characters */
/* mcc : indication if siblings follow child characters */
/*----------------------------------------------------------------------------*/
#define CCE_cc(cce, i) ((cce)[3 + CCE_ecs((cce)) + (i)])
#define CCE_ccc(cce, i) (CCE_cc((cce), (i)) == CCE_cc((cce), 0))
#define CCE_ccs(cce) (CCE_cct((cce)) - (CCE_mcc((cce)) ? 1 : 0))
#define CCE_ec(cce, i) ((cce)[3 + (i)])
#define CCE_ecs(cce) ((CCE_cct((cce)) <= 1) ? CCE_act((cce)) : (CCE_d((cce)) ? 1 : 0))
#define CCE_mcc(cce) ((CCE_cct((cce)) + (CCE_d((cce)) ? 1 : 0) == 6))
/*----------------------------------------------------------------------------*/
/* Format-0 Sibling Descriptors macro's (SD0) */
/*----------------------------------------------------------------------------*/
/* sct : sibling count */
/* y(i) : examine child bit for siblings 1 to 5 */
/*----------------------------------------------------------------------------*/
#define SD0_sct(sd0) ((sd0)[0] >> 5)
#define SD0_y(sd0, i) ((sd0)[0] & (0x10 >> (i)))
/*----------------------------------------------------------------------------*/
/* Format-0 Sibling Descriptors macro's (SD0) derived */
/*----------------------------------------------------------------------------*/
/* ccc(i) : indication consecutive child character */
/* ecb(i) : examine child bit, if y then 6th/7th fetched from parent */
/* msc : indication if siblings follows last sibling */
/* sc(i) : sibling character */
/* scs : number of sibling characters */
/*----------------------------------------------------------------------------*/
#define SD0_ccc(sd0, i) (SD0_sc((sd0), (i)) == SD0_sc((sd0), 0))
#define SD0_ecb(sd0, i, cce, y) (((i) < 5) ? SD0_y((sd0), (i)) : (y) ? CCE_y((cce), ((i) - 5)) : 1)
#define SD0_msc(sd0) (!SD0_sct((sd0)))
#define SD0_sc(sd0, i) ((sd0)[1 + (i)])
#define SD0_scs(sd0) (SD0_msc((sd0)) ? 7 : SD0_sct((sd0)))
/*----------------------------------------------------------------------------*/
/* Format-1 Sibling Descriptors macro's (SD1) */
/*----------------------------------------------------------------------------*/
/* sct : sibling count */
/* y(i) : examine child bit for sibling 1 to 12 */
/*----------------------------------------------------------------------------*/
#define SD1_sct(sd1) ((sd1)[0] >> 4)
#define SD1_y(sd1, i) ((i) < 4 ? ((sd1)[0] & (0x08 >> (i))) : ((sd1)[1] & (0x800 >> (i))))
/*----------------------------------------------------------------------------*/
/* Format-1 Sibling Descriptors macro's (SD1) derived */
/*----------------------------------------------------------------------------*/
/* ccc(i) : indication consecutive child character */
/* ecb(i) : examine child bit, if y then 13th/14th fetched from parent */
/* msc : indication if siblings follows last sibling */
/* sc(i) : sibling character */
/* scs : number of sibling characters */
/*----------------------------------------------------------------------------*/
#define SD1_ccc(sd1, sd2, i) (SD1_sc((sd1), (sd2), (i)) == SD1_sc((sd1), (sd2), 0))
#define SD1_ecb(sd1, i, cce, y) (((i) < 12) ? SD1_y((sd1), (i)) : (y) ? CCE_y((cce), ((i) - 12)) : 1)
#define SD1_msc(sd1) ((SD1_sct((sd1)) == 15))
#define SD1_sc(sd1, sd2, i) ((i) < 6 ? (sd1)[2 + (i)] : (sd2)[(i) - 6])
#define SD1_scs(sd1) (SD1_msc((sd1)) ? 14 : SD1_sct((sd1)))
/*----------------------------------------------------------------------------*/
/* Format independent sibling descriptor macro's */
/*----------------------------------------------------------------------------*/
#define SD_ccc(f1, sd1, sd2, i) ((f1) ? SD1_ccc((sd1), (sd2), (i)) : SD0_ccc((sd1), (i)))
#define SD_ecb(f1, sd1, i, cce, y) ((f1) ? SD1_ecb((sd1), (i), (cce), (y)) : SD0_ecb((sd1), (i), (cce), (y)))
#define SD_msc(f1, sd1) ((f1) ? SD1_msc((sd1)) : SD0_msc((sd1)))
#define SD_sc(f1, sd1, sd2, i) ((f1) ? SD1_sc((sd1), (sd2), (i)) : SD0_sc((sd1), (i)))
#define SD_scs(f1, sd1) ((f1) ? SD1_scs((sd1)) : SD0_scs((sd1)))
/*============================================================================*/
/*----------------------------------------------------------------------------*/
/* compress */
/*----------------------------------------------------------------------------*/
static void ARCH_DEP(compress)(int r1, int r2, REGS *regs, REGS *iregs)
{
struct cc cc; /* Compression context */
BYTE ch1; /* Character read */
BYTE ch2 = 0;
int i; /* Index */
U16 is; /* Last matched index symbol */
GREG srclen; /* Source length */
/* Initialize values */
srclen = GR_A(r2 + 1, iregs);
/* Initialize compression context */
cc.dctsz = GR0_dctsz(regs);
memset(cc.dea, 0, sizeof(cc.dea));
cc.dest = NULL;
for(i = 0; i < (0x01 << GR0_cdss(regs)); i++)
{
cc.dict[i] = NULL;
cc.edict[i] = NULL;
}
cc.dictor = GR1_dictor(iregs);
cc.f1 = GR0_f1(regs);
cc.iregs = iregs;
cc.ofst = 0;
cc.r1 = r1;
cc.r2 = r2;
cc.regs = regs;
cc.smbsz = GR0_smbsz(regs);
cc.src = NULL;
cc.st = GR0_st(regs) ? 1 : 0;
/* Process individual index symbols until cbn bocomes zero */
while(unlikely(GR1_cbn(iregs)))
{
/* Get the next characters and adjust alphabet entry, return on end of source */
if(unlikely(ARCH_DEP(fetch_chs_and_adjust)(&cc, &ch1, &ch2)))
return;
cc.dead_end = 1;
is = ch1;
/* Do normal searching on unknown dead end */
if(likely(!cc.dea[is][ch2]))
{
/* Get the alphabet entry and try to find a child */
cc.cce = ARCH_DEP(fetch_cce)(&cc, is);
while(ARCH_DEP(search_cce)(&cc, &ch1, &is));
if(unlikely(cc.dead_end))
{
/* We found a dead end combination */
cc.dea[is][ch2] = 1;
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90365, "D", is, ch2, "found");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
}
}
#ifdef OPTION_CMPSC_DEBUG
else
WRMSG(HHC90365, "D", is, ch2, "encountered");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
/* Write the last match, return on end of destination */
if(unlikely(ARCH_DEP(store_is)(&cc, is)))
return;
/* Commit registers */
COMMITREGS(regs, iregs, r1, r2);
}
/* Block processing, cbn stays zero */
while(likely(GR_A(r1 + 1, iregs) >= cc.smbsz))
{
for(i = 0; i < 8; i++)
{
/* Get the next characters and adjust alphabet entry, return on end of source */
if(unlikely(ARCH_DEP(fetch_chs_and_adjust)(&cc, &ch1, &ch2)))
{
int j;
/* Write individual found index symbols */
for(j = 0; j < i; j++)
ARCH_DEP(store_is)(&cc, cc.is[j]);
COMMITREGS(regs, iregs, r1, r2);
return;
}
cc.dead_end = 1;
is = ch1;
/* Do normal searching on unknown dead end */
if(likely(!cc.dea[is][ch2]))
{
/* Get the alphabet entry and try to find a child */
cc.cce = ARCH_DEP(fetch_cce)(&cc, is);
while(ARCH_DEP(search_cce)(&cc, &ch1, &is));
if(unlikely(cc.dead_end))
{
/* We found a dead end combination */
cc.dea[is][ch2] = 1;
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90365, "D", is, ch2, "found");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
}
}
#ifdef OPTION_CMPSC_DEBUG
else
WRMSG(HHC90365, "D", is, ch2, "encountered");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
cc.is[i] = is;
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90314, "D", is, i);
#endif /* #ifdef OPTION_CMPSC_DEBUG */
}
/* Write index symbols and commit */
ARCH_DEP(store_iss)(&cc);
COMMITREGS2(regs, iregs, r1, r2);
/* Return with cc3 on interrupt pending after a minumum size of processing */
if(unlikely(srclen - GR_A(r2 + 1, iregs) >= MINPROC_SIZE && INTERRUPT_PENDING(regs)))
{
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90315, "D");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
regs->psw.cc = 3;
return;
}
}
while(GR_A(r2 + 1, iregs))
{
/* Get the next characters and adjust alphabet entry, return on end of source */
if(unlikely(ARCH_DEP(fetch_chs_and_adjust)(&cc, &ch1, &ch2)))
return;
cc.dead_end = 1;
is = ch1;
/* Do normal searching on unknown dead end */
if(unlikely(!cc.dea[is][ch2]))
{
/* Get the alphabet entry and try to find a child */
cc.cce = ARCH_DEP(fetch_cce)(&cc, is);
while(ARCH_DEP(search_cce)(&cc, &ch1, &is));
if(unlikely(cc.dead_end))
{
/* We found a dead end combination */
cc.dea[is][ch2] = 1;
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90365, "D", is, ch2, "found");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
}
}
#ifdef OPTION_CMPSC_DEBUG
else
WRMSG(HHC90365, "D", is, ch2, "encountered");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
/* Write the last match, return on end of destination */
if(unlikely(ARCH_DEP(store_is)(&cc, is)))
return;
/* Commit registers */
COMMITREGS(regs, iregs, r1, r2);
}
}
/*----------------------------------------------------------------------------*/
/* fetch_cce (compression character entry) */
/*----------------------------------------------------------------------------*/
static BYTE *ARCH_DEP(fetch_cce)(struct cc *cc, unsigned index)
{
BYTE *cce; /* Compression child entry */
unsigned cct; /* Child count */
index *= 8;
if(unlikely(!cc->dict[index / 0x800]))
cc->dict[index / 0x800] = MADDR((cc->dictor + (index / 0x800) * 0x800) & ADDRESS_MAXWRAP(cc->regs), cc->r2, cc->regs, ACCTYPE_READ, cc->regs->psw.pkey);
cce = &cc->dict[index / 0x800][index % 0x800];
ITIMER_SYNC((cc->dictor + index) & ADDRESS_MAXWRAP(cc->regs), 8 - 1, cc->regs);
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90316, "D", index / 8);
print_cce(cce);
#endif /* #ifdef OPTION_CMPSC_DEBUG */
/* Check for data exception */
cct = CCE_cct(cce);
if(cct < 2)
{
if(unlikely(CCE_act(cce) > 4))
ARCH_DEP(program_interrupt)(cc->regs, PGM_DATA_EXCEPTION);
}
else
{
if(!CCE_d(cce))
{
if(unlikely(cct == 7))
ARCH_DEP(program_interrupt)(cc->regs, PGM_DATA_EXCEPTION);
}
else
{
if(unlikely(cct > 5))
ARCH_DEP(program_interrupt)(cc->regs, PGM_DATA_EXCEPTION);
}
}
return(cce);
}
/*----------------------------------------------------------------------------*/
/* fetch_ch (character) */
/*----------------------------------------------------------------------------*/
static int ARCH_DEP(fetch_ch)(struct cc *cc, BYTE *ch)
{
unsigned ofst; /* Offset within page */
/* Check for end of source condition */
if(unlikely(!GR_A(cc->r2 + 1, cc->iregs)))
{
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90317, "D");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
cc->regs->psw.cc = 0;
return(-1);
}
ofst = GR_A(cc->r2, cc->iregs) & 0x7ff;
ITIMER_SYNC(GR_A(cc->r2, cc->iregs) & ADDRESS_MAXWRAP(cc->regs), 1 - 1, cc->regs);
/* Fingers crossed that we stay within current page */
if(unlikely(!cc->src || ofst < cc->ofst))
cc->src = MADDR((GR_A(cc->r2, cc->iregs) & ~0x7ff) & ADDRESS_MAXWRAP(cc->regs), cc->r2, cc->regs, ACCTYPE_READ, cc->regs->psw.pkey);
*ch = cc->src[ofst];
cc->ofst = ofst;
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90318, "D", *ch, GR_A(cc->r2, cc->iregs));
#endif /* #ifdef OPTION_CMPSC_DEBUG */
return(0);
}
/*----------------------------------------------------------------------------*/
/* fetch_chs_and_adjust (characters) */
/*----------------------------------------------------------------------------*/
static int ARCH_DEP(fetch_chs_and_adjust)(struct cc *cc, BYTE *ch1, BYTE *ch2)
{
#ifdef OPTION_CMPSC_DEBUG
char buf[6]; /* Print buffer for 2 or 1 character */
#endif /* #ifdef OPTION_CMPSC_DEBUG */
U64 len; /* Source length left */
unsigned ofst; /* Offset within page */
/* Check for end of source condition */
len = GR_A(cc->r2 + 1, cc->iregs);
if(unlikely(!len))
{
#ifdef OPTION_CMPSC_DEBUG
WRMSG(HHC90317, "D");
#endif /* #ifdef OPTION_CMPSC_DEBUG */
cc->regs->psw.cc = 0;
return(-1);
}
ofst = GR_A(cc->r2, cc->iregs) & 0x7ff;
ITIMER_SYNC(GR_A(cc->r2, cc->iregs) & ADDRESS_MAXWRAP(cc->regs), 1 - 1, cc->regs);
/* Fingers crossed that we stay within current page */
if(unlikely(!cc->src || ofst < cc->ofst))
cc->src = MADDR((GR_A(cc->r2, cc->iregs) & ~0x7ff) & ADDRESS_MAXWRAP(cc->regs), cc->r2, cc->regs, ACCTYPE_READ, cc->regs->psw.pkey);
*ch1 = cc->src[ofst];
cc->ofst = ofst;
/* Adjust registers, we always match the alphabet entry */
ADJUSTREGS(cc->r2, cc->regs, cc->iregs, 1);
len--;
/* Check if 2nd character available */
if(unlikely(!len))
{
#ifdef OPTION_CMPSC_DEBUG
snprintf(buf, 6, "%02X", *ch1);
WRMSG(HHC90313, "D", buf, GR_A(cc->r2, cc->iregs) - 1);
#endif /* #ifdef OPTION_CMPSC_DEBUG */
return(0); /* It is ok when dead_end is detected */
}
ITIMER_SYNC(GR_A(cc->r2, cc->iregs) & ADDRESS_MAXWRAP(cc->regs), 1 - 1, cc->regs);
/* Fingers crossed that we stay within current page */
ofst++;
if(unlikely(ofst == 0x800))
{
ofst = 0;
cc->src = MADDR((GR_A(cc->r2, cc->iregs) & ~0x7ff) & ADDRESS_MAXWRAP(cc->regs), cc->r2, cc->regs, ACCTYPE_READ, cc->regs->psw.pkey);
}
*ch2 = cc->src[ofst];
cc->ofst = ofst;
#ifdef OPTION_CMPSC_DEBUG
snprintf(buf, 6, "%02X %02X", *ch1, *ch2);
WRMSG(HHC90313, "D", buf, GR_A(cc->r2, cc->iregs) - 1);
#endif /* #ifdef OPTION_CMPSC_DEBUG */
return(0);
}
#ifndef NO_2ND_COMPILE
#ifdef OPTION_CMPSC_DEBUG
/*----------------------------------------------------------------------------*/
/* print_cce (compression character entry). */
/*----------------------------------------------------------------------------*/
static void print_cce(BYTE *cce)
{
char buf[128]; /* Buffer */
int j; /* Index */
int prt_detail; /* Switch for detailed printing */
buf[0] = 0;
prt_detail = 0;
for(j = 0; j < 8; j++)
{
if(!prt_detail && cce[j])
prt_detail = 1;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", cce[j]);
buf[sizeof(buf)-1] = '\0';
}
if(prt_detail)
{
WRGMSG_ON;
WRGMSG(HHC90319, "D", buf);;
WRGMSG(HHC90320, "D", CCE_cct(cce));
switch(CCE_cct(cce))
{
case 0:
{
WRGMSG(HHC90321, "D", (int) CCE_act(cce));
if(CCE_act(cce))
{
buf[0] = 0;
for(j = 0; j < CCE_ecs(cce); j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %02X", CCE_ec(cce, j));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90322, "D", buf);
}
break;
}
case 1:
{
WRGMSG(HHC90323, "D", (int) (CCE_x(cce, 0) ? '1' : '0'));
WRGMSG(HHC90324, "D", (int) CCE_act(cce));
WRGMSG(HHC90325, "D", CCE_cptr(cce));
if(CCE_act(cce))
{
buf[0] = 0;
for(j = 0; j < CCE_ecs(cce); j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %02X", CCE_ec(cce, j));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90322, "D", buf);
}
WRGMSG(HHC90326, "D", CCE_cc(cce, 0));
break;
}
default:
{
buf[0] = 0;
for(j = 0; j < 5; j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c", (int) (CCE_x(cce, j) ? '1' : '0'));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90327, "D", buf);
buf[0] = 0;
for(j = 0; j < 2; j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c", (int) (CCE_y(cce, j) ? '1' : '0'));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90328, "D", buf);
WRGMSG(HHC90329, "D", TRUEFALSE(CCE_d(cce)));
WRGMSG(HHC90325, "D", CCE_cptr(cce));
if(CCE_d(cce))
WRGMSG(HHC90330, "D", CCE_ec(cce, 0));
buf[0] = 0;
for(j = 0; j < CCE_ccs(cce); j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %02X", CCE_cc(cce, j));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90331, "D", buf);
break;
}
}
WRGMSG_OFF;
}
else
WRMSG(HHC90319, "D", buf);
}
/*----------------------------------------------------------------------------*/
/* print_sd (sibling descriptor). */
/*----------------------------------------------------------------------------*/
static void print_sd(int f1, BYTE *sd1, BYTE *sd2)
{
char buf[128]; /* Buffer */
int j; /* Index */
int prt_detail; /* Switch for detailed printing */
if(f1)
{
buf[0] = 0;
prt_detail = 0;
for(j = 0; j < 8; j++)
{
if(!prt_detail && sd1[j])
prt_detail = 1;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sd1[j]);
}
buf[sizeof(buf)-1] = '\0';
for(j = 0; j < 8; j++)
{
if(!prt_detail && sd2[j])
prt_detail = 1;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sd2[j]);
}
buf[sizeof(buf)-1] = '\0';
if(prt_detail)
{
WRGMSG_ON;
WRGMSG(HHC90332, "D", buf);
WRGMSG(HHC90333, "D", SD1_sct(sd1));
buf[0] = 0;
for(j = 0; j < 12; j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c", (SD1_y(sd1, j) ? '1' : '0'));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90334, "D", buf);
buf[0] = 0;
for(j = 0; j < SD1_scs(sd1); j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %02X", SD1_sc(sd1, sd2, j));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90335, "D", buf);
WRGMSG_OFF;
}
else
WRMSG(HHC90332, "D", buf);
}
else
{
buf[0] = 0;
prt_detail = 0;
for(j = 0; j < 8; j++)
{
if(!prt_detail && sd1[j])
prt_detail = 1;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%02X", sd1[j]);
}
buf[sizeof(buf)-1] = '\0';
if(prt_detail)
{
WRGMSG_ON;
WRGMSG(HHC90336, "D", buf);
WRGMSG(HHC90333, "D", SD0_sct(sd1));
buf[0] = 0;
for(j = 0; j < 5; j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c", (SD0_y(sd1, j) ? '1' : '0'));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90337, "D", buf);
buf[0] = 0;
for(j = 0; j < SD0_scs(sd1); j++)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %02X", SD0_sc(sd1, j));
buf[sizeof(buf)-1] = '\0';
WRGMSG(HHC90335, "D", buf);
WRGMSG_OFF;
}
else
WRMSG(HHC90336, "D", buf);
}
}
#endif /* #ifdef OPTION_CMPSC_DEBUG */
#endif /* #ifndef NO_2ND_COMPILE */
/*----------------------------------------------------------------------------*/
/* search_cce (compression character entry) */
/*----------------------------------------------------------------------------*/
static int ARCH_DEP(search_cce)(struct cc *cc, BYTE *ch, U16 *is)
{
BYTE *ccce; /* Child compression character entry */
int ccs; /* Number of child characters */
int i; /* Child character index */
int ind_search_siblings; /* Indicator for searching siblings */
/* Initialize values */
ccs = CCE_ccs(cc->cce);
/* Get the next character when there are children */
if(likely(ccs))
{
if(ARCH_DEP(fetch_ch(cc, ch)))
return(0);
ind_search_siblings = 1;
/* Now check all children in parent */
for(i = 0; i < ccs; i++)
{
/* Stop searching when child tested and no consecutive child character */
if(unlikely(!ind_search_siblings && !CCE_ccc(cc->cce, i)))