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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/libdecnumber/dpd/decimal128.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/libdecnumber/dpd/decimal128.c')
-rw-r--r--qemu/libdecnumber/dpd/decimal128.c564
1 files changed, 564 insertions, 0 deletions
diff --git a/qemu/libdecnumber/dpd/decimal128.c b/qemu/libdecnumber/dpd/decimal128.c
new file mode 100644
index 000000000..7551b7caa
--- /dev/null
+++ b/qemu/libdecnumber/dpd/decimal128.c
@@ -0,0 +1,564 @@
+/* Decimal 128-bit format module for the decNumber C Library.
+ Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+ Contributed by IBM Corporation. Author Mike Cowlishaw.
+
+ This file is part of GCC.
+
+ GCC is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2, or (at your option) any later
+ version.
+
+ In addition to the permissions in the GNU General Public License,
+ the Free Software Foundation gives you unlimited permission to link
+ the compiled version of this file into combinations with other
+ programs, and to distribute those combinations without any
+ restriction coming from the use of this file. (The General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into a combine executable.)
+
+ GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING. If not, write to the Free
+ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+/* ------------------------------------------------------------------ */
+/* Decimal 128-bit format module */
+/* ------------------------------------------------------------------ */
+/* This module comprises the routines for decimal128 format numbers. */
+/* Conversions are supplied to and from decNumber and String. */
+/* */
+/* This is used when decNumber provides operations, either for all */
+/* operations or as a proxy between decNumber and decSingle. */
+/* */
+/* Error handling is the same as decNumber (qv.). */
+/* ------------------------------------------------------------------ */
+#include <string.h> /* [for memset/memcpy] */
+#include <stdio.h> /* [for printf] */
+
+#include "libdecnumber/dconfig.h"
+#define DECNUMDIGITS 34 /* make decNumbers with space for 34 */
+#include "libdecnumber/decNumber.h"
+#include "libdecnumber/decNumberLocal.h"
+#include "libdecnumber/dpd/decimal128.h"
+
+/* Utility routines and tables [in decimal64.c] */
+extern const uInt COMBEXP[32], COMBMSD[32];
+extern const uByte BIN2CHAR[4001];
+
+extern void decDigitsFromDPD(decNumber *, const uInt *, Int);
+extern void decDigitsToDPD(const decNumber *, uInt *, Int);
+
+#if DECTRACE || DECCHECK
+void decimal128Show(const decimal128 *); /* for debug */
+extern void decNumberShow(const decNumber *); /* .. */
+#endif
+
+/* Useful macro */
+/* Clear a structure (e.g., a decNumber) */
+#define DEC_clear(d) memset(d, 0, sizeof(*d))
+
+/* ------------------------------------------------------------------ */
+/* decimal128FromNumber -- convert decNumber to decimal128 */
+/* */
+/* ds is the target decimal128 */
+/* dn is the source number (assumed valid) */
+/* set is the context, used only for reporting errors */
+/* */
+/* The set argument is used only for status reporting and for the */
+/* rounding mode (used if the coefficient is more than DECIMAL128_Pmax*/
+/* digits or an overflow is detected). If the exponent is out of the */
+/* valid range then Overflow or Underflow will be raised. */
+/* After Underflow a subnormal result is possible. */
+/* */
+/* DEC_Clamped is set if the number has to be 'folded down' to fit, */
+/* by reducing its exponent and multiplying the coefficient by a */
+/* power of ten, or if the exponent on a zero had to be clamped. */
+/* ------------------------------------------------------------------ */
+decimal128 * decimal128FromNumber(decimal128 *d128, const decNumber *dn,
+ decContext *set) {
+ uInt status=0; /* status accumulator */
+ Int ae; /* adjusted exponent */
+ decNumber dw; /* work */
+ decContext dc; /* .. */
+ uInt *pu; /* .. */
+ uInt comb, exp; /* .. */
+ uInt targar[4]={0,0,0,0}; /* target 128-bit */
+ #define targhi targar[3] /* name the word with the sign */
+ #define targmh targar[2] /* name the words */
+ #define targml targar[1] /* .. */
+ #define targlo targar[0] /* .. */
+
+ /* If the number has too many digits, or the exponent could be */
+ /* out of range then reduce the number under the appropriate */
+ /* constraints. This could push the number to Infinity or zero, */
+ /* so this check and rounding must be done before generating the */
+ /* decimal128] */
+ ae=dn->exponent+dn->digits-1; /* [0 if special] */
+ if (dn->digits>DECIMAL128_Pmax /* too many digits */
+ || ae>DECIMAL128_Emax /* likely overflow */
+ || ae<DECIMAL128_Emin) { /* likely underflow */
+ decContextDefault(&dc, DEC_INIT_DECIMAL128); /* [no traps] */
+ dc.round=set->round; /* use supplied rounding */
+ decNumberPlus(&dw, dn, &dc); /* (round and check) */
+ /* [this changes -0 to 0, so enforce the sign...] */
+ dw.bits|=dn->bits&DECNEG;
+ status=dc.status; /* save status */
+ dn=&dw; /* use the work number */
+ } /* maybe out of range */
+
+ if (dn->bits&DECSPECIAL) { /* a special value */
+ if (dn->bits&DECINF) targhi=DECIMAL_Inf<<24;
+ else { /* sNaN or qNaN */
+ if ((*dn->lsu!=0 || dn->digits>1) /* non-zero coefficient */
+ && (dn->digits<DECIMAL128_Pmax)) { /* coefficient fits */
+ decDigitsToDPD(dn, targar, 0);
+ }
+ if (dn->bits&DECNAN) targhi|=DECIMAL_NaN<<24;
+ else targhi|=DECIMAL_sNaN<<24;
+ } /* a NaN */
+ } /* special */
+
+ else { /* is finite */
+ if (decNumberIsZero(dn)) { /* is a zero */
+ /* set and clamp exponent */
+ if (dn->exponent<-DECIMAL128_Bias) {
+ exp=0; /* low clamp */
+ status|=DEC_Clamped;
+ }
+ else {
+ exp=dn->exponent+DECIMAL128_Bias; /* bias exponent */
+ if (exp>DECIMAL128_Ehigh) { /* top clamp */
+ exp=DECIMAL128_Ehigh;
+ status|=DEC_Clamped;
+ }
+ }
+ comb=(exp>>9) & 0x18; /* msd=0, exp top 2 bits .. */
+ }
+ else { /* non-zero finite number */
+ uInt msd; /* work */
+ Int pad=0; /* coefficient pad digits */
+
+ /* the dn is known to fit, but it may need to be padded */
+ exp=(uInt)(dn->exponent+DECIMAL128_Bias); /* bias exponent */
+ if (exp>DECIMAL128_Ehigh) { /* fold-down case */
+ pad=exp-DECIMAL128_Ehigh;
+ exp=DECIMAL128_Ehigh; /* [to maximum] */
+ status|=DEC_Clamped;
+ }
+
+ /* [fastpath for common case is not a win, here] */
+ decDigitsToDPD(dn, targar, pad);
+ /* save and clear the top digit */
+ msd=targhi>>14;
+ targhi&=0x00003fff;
+
+ /* create the combination field */
+ if (msd>=8) comb=0x18 | ((exp>>11) & 0x06) | (msd & 0x01);
+ else comb=((exp>>9) & 0x18) | msd;
+ }
+ targhi|=comb<<26; /* add combination field .. */
+ targhi|=(exp&0xfff)<<14; /* .. and exponent continuation */
+ } /* finite */
+
+ if (dn->bits&DECNEG) targhi|=0x80000000; /* add sign bit */
+
+ /* now write to storage; this is endian */
+ pu=(uInt *)d128->bytes; /* overlay */
+ if (DECLITEND) {
+ pu[0]=targlo; /* directly store the low int */
+ pu[1]=targml; /* then the mid-low */
+ pu[2]=targmh; /* then the mid-high */
+ pu[3]=targhi; /* then the high int */
+ }
+ else {
+ pu[0]=targhi; /* directly store the high int */
+ pu[1]=targmh; /* then the mid-high */
+ pu[2]=targml; /* then the mid-low */
+ pu[3]=targlo; /* then the low int */
+ }
+
+ if (status!=0) decContextSetStatus(set, status); /* pass on status */
+ /* decimal128Show(d128); */
+ return d128;
+ } /* decimal128FromNumber */
+
+/* ------------------------------------------------------------------ */
+/* decimal128ToNumber -- convert decimal128 to decNumber */
+/* d128 is the source decimal128 */
+/* dn is the target number, with appropriate space */
+/* No error is possible. */
+/* ------------------------------------------------------------------ */
+decNumber * decimal128ToNumber(const decimal128 *d128, decNumber *dn) {
+ uInt msd; /* coefficient MSD */
+ uInt exp; /* exponent top two bits */
+ uInt comb; /* combination field */
+ const uInt *pu; /* work */
+ Int need; /* .. */
+ uInt sourar[4]; /* source 128-bit */
+ #define sourhi sourar[3] /* name the word with the sign */
+ #define sourmh sourar[2] /* and the mid-high word */
+ #define sourml sourar[1] /* and the mod-low word */
+ #define sourlo sourar[0] /* and the lowest word */
+
+ /* load source from storage; this is endian */
+ pu=(const uInt *)d128->bytes; /* overlay */
+ if (DECLITEND) {
+ sourlo=pu[0]; /* directly load the low int */
+ sourml=pu[1]; /* then the mid-low */
+ sourmh=pu[2]; /* then the mid-high */
+ sourhi=pu[3]; /* then the high int */
+ }
+ else {
+ sourhi=pu[0]; /* directly load the high int */
+ sourmh=pu[1]; /* then the mid-high */
+ sourml=pu[2]; /* then the mid-low */
+ sourlo=pu[3]; /* then the low int */
+ }
+
+ comb=(sourhi>>26)&0x1f; /* combination field */
+
+ decNumberZero(dn); /* clean number */
+ if (sourhi&0x80000000) dn->bits=DECNEG; /* set sign if negative */
+
+ msd=COMBMSD[comb]; /* decode the combination field */
+ exp=COMBEXP[comb]; /* .. */
+
+ if (exp==3) { /* is a special */
+ if (msd==0) {
+ dn->bits|=DECINF;
+ return dn; /* no coefficient needed */
+ }
+ else if (sourhi&0x02000000) dn->bits|=DECSNAN;
+ else dn->bits|=DECNAN;
+ msd=0; /* no top digit */
+ }
+ else { /* is a finite number */
+ dn->exponent=(exp<<12)+((sourhi>>14)&0xfff)-DECIMAL128_Bias; /* unbiased */
+ }
+
+ /* get the coefficient */
+ sourhi&=0x00003fff; /* clean coefficient continuation */
+ if (msd) { /* non-zero msd */
+ sourhi|=msd<<14; /* prefix to coefficient */
+ need=12; /* process 12 declets */
+ }
+ else { /* msd=0 */
+ if (sourhi) need=11; /* declets to process */
+ else if (sourmh) need=10;
+ else if (sourml) need=7;
+ else if (sourlo) need=4;
+ else return dn; /* easy: coefficient is 0 */
+ } /*msd=0 */
+
+ decDigitsFromDPD(dn, sourar, need); /* process declets */
+ /* decNumberShow(dn); */
+ return dn;
+ } /* decimal128ToNumber */
+
+/* ------------------------------------------------------------------ */
+/* to-scientific-string -- conversion to numeric string */
+/* to-engineering-string -- conversion to numeric string */
+/* */
+/* decimal128ToString(d128, string); */
+/* decimal128ToEngString(d128, string); */
+/* */
+/* d128 is the decimal128 format number to convert */
+/* string is the string where the result will be laid out */
+/* */
+/* string must be at least 24 characters */
+/* */
+/* No error is possible, and no status can be set. */
+/* ------------------------------------------------------------------ */
+char * decimal128ToEngString(const decimal128 *d128, char *string){
+ decNumber dn; /* work */
+ decimal128ToNumber(d128, &dn);
+ decNumberToEngString(&dn, string);
+ return string;
+ } /* decimal128ToEngString */
+
+char * decimal128ToString(const decimal128 *d128, char *string){
+ uInt msd; /* coefficient MSD */
+ Int exp; /* exponent top two bits or full */
+ uInt comb; /* combination field */
+ char *cstart; /* coefficient start */
+ char *c; /* output pointer in string */
+ const uInt *pu; /* work */
+ char *s, *t; /* .. (source, target) */
+ Int dpd; /* .. */
+ Int pre, e; /* .. */
+ const uByte *u; /* .. */
+
+ uInt sourar[4]; /* source 128-bit */
+ #define sourhi sourar[3] /* name the word with the sign */
+ #define sourmh sourar[2] /* and the mid-high word */
+ #define sourml sourar[1] /* and the mod-low word */
+ #define sourlo sourar[0] /* and the lowest word */
+
+ /* load source from storage; this is endian */
+ pu=(const uInt *)d128->bytes; /* overlay */
+ if (DECLITEND) {
+ sourlo=pu[0]; /* directly load the low int */
+ sourml=pu[1]; /* then the mid-low */
+ sourmh=pu[2]; /* then the mid-high */
+ sourhi=pu[3]; /* then the high int */
+ }
+ else {
+ sourhi=pu[0]; /* directly load the high int */
+ sourmh=pu[1]; /* then the mid-high */
+ sourml=pu[2]; /* then the mid-low */
+ sourlo=pu[3]; /* then the low int */
+ }
+
+ c=string; /* where result will go */
+ if (((Int)sourhi)<0) *c++='-'; /* handle sign */
+
+ comb=(sourhi>>26)&0x1f; /* combination field */
+ msd=COMBMSD[comb]; /* decode the combination field */
+ exp=COMBEXP[comb]; /* .. */
+
+ if (exp==3) {
+ if (msd==0) { /* infinity */
+ strcpy(c, "Inf");
+ strcpy(c+3, "inity");
+ return string; /* easy */
+ }
+ if (sourhi&0x02000000) *c++='s'; /* sNaN */
+ strcpy(c, "NaN"); /* complete word */
+ c+=3; /* step past */
+ if (sourlo==0 && sourml==0 && sourmh==0
+ && (sourhi&0x0003ffff)==0) return string; /* zero payload */
+ /* otherwise drop through to add integer; set correct exp */
+ exp=0; msd=0; /* setup for following code */
+ }
+ else exp=(exp<<12)+((sourhi>>14)&0xfff)-DECIMAL128_Bias; /* unbiased */
+
+ /* convert 34 digits of significand to characters */
+ cstart=c; /* save start of coefficient */
+ if (msd) *c++='0'+(char)msd; /* non-zero most significant digit */
+
+ /* Now decode the declets. After extracting each one, it is */
+ /* decoded to binary and then to a 4-char sequence by table lookup; */
+ /* the 4-chars are a 1-char length (significant digits, except 000 */
+ /* has length 0). This allows us to left-align the first declet */
+ /* with non-zero content, then remaining ones are full 3-char */
+ /* length. We use fixed-length memcpys because variable-length */
+ /* causes a subroutine call in GCC. (These are length 4 for speed */
+ /* and are safe because the array has an extra terminator byte.) */
+ #define dpd2char u=&BIN2CHAR[DPD2BIN[dpd]*4]; \
+ if (c!=cstart) {memcpy(c, u+1, 4); c+=3;} \
+ else if (*u) {memcpy(c, u+4-*u, 4); c+=*u;}
+ dpd=(sourhi>>4)&0x3ff; /* declet 1 */
+ dpd2char;
+ dpd=((sourhi&0xf)<<6) | (sourmh>>26); /* declet 2 */
+ dpd2char;
+ dpd=(sourmh>>16)&0x3ff; /* declet 3 */
+ dpd2char;
+ dpd=(sourmh>>6)&0x3ff; /* declet 4 */
+ dpd2char;
+ dpd=((sourmh&0x3f)<<4) | (sourml>>28); /* declet 5 */
+ dpd2char;
+ dpd=(sourml>>18)&0x3ff; /* declet 6 */
+ dpd2char;
+ dpd=(sourml>>8)&0x3ff; /* declet 7 */
+ dpd2char;
+ dpd=((sourml&0xff)<<2) | (sourlo>>30); /* declet 8 */
+ dpd2char;
+ dpd=(sourlo>>20)&0x3ff; /* declet 9 */
+ dpd2char;
+ dpd=(sourlo>>10)&0x3ff; /* declet 10 */
+ dpd2char;
+ dpd=(sourlo)&0x3ff; /* declet 11 */
+ dpd2char;
+
+ if (c==cstart) *c++='0'; /* all zeros -- make 0 */
+
+ if (exp==0) { /* integer or NaN case -- easy */
+ *c='\0'; /* terminate */
+ return string;
+ }
+
+ /* non-0 exponent */
+ e=0; /* assume no E */
+ pre=c-cstart+exp;
+ /* [here, pre-exp is the digits count (==1 for zero)] */
+ if (exp>0 || pre<-5) { /* need exponential form */
+ e=pre-1; /* calculate E value */
+ pre=1; /* assume one digit before '.' */
+ } /* exponential form */
+
+ /* modify the coefficient, adding 0s, '.', and E+nn as needed */
+ s=c-1; /* source (LSD) */
+ if (pre>0) { /* ddd.ddd (plain), perhaps with E */
+ char *dotat=cstart+pre;
+ if (dotat<c) { /* if embedded dot needed... */
+ t=c; /* target */
+ for (; s>=dotat; s--, t--) *t=*s; /* open the gap; leave t at gap */
+ *t='.'; /* insert the dot */
+ c++; /* length increased by one */
+ }
+
+ /* finally add the E-part, if needed; it will never be 0, and has */
+ /* a maximum length of 4 digits */
+ if (e!=0) {
+ *c++='E'; /* starts with E */
+ *c++='+'; /* assume positive */
+ if (e<0) {
+ *(c-1)='-'; /* oops, need '-' */
+ e=-e; /* uInt, please */
+ }
+ if (e<1000) { /* 3 (or fewer) digits case */
+ u=&BIN2CHAR[e*4]; /* -> length byte */
+ memcpy(c, u+4-*u, 4); /* copy fixed 4 characters [is safe] */
+ c+=*u; /* bump pointer appropriately */
+ }
+ else { /* 4-digits */
+ Int thou=((e>>3)*1049)>>17; /* e/1000 */
+ Int rem=e-(1000*thou); /* e%1000 */
+ *c++='0'+(char)thou;
+ u=&BIN2CHAR[rem*4]; /* -> length byte */
+ memcpy(c, u+1, 4); /* copy fixed 3+1 characters [is safe] */
+ c+=3; /* bump pointer, always 3 digits */
+ }
+ }
+ *c='\0'; /* add terminator */
+ /*printf("res %s\n", string); */
+ return string;
+ } /* pre>0 */
+
+ /* -5<=pre<=0: here for plain 0.ddd or 0.000ddd forms (can never have E) */
+ t=c+1-pre;
+ *(t+1)='\0'; /* can add terminator now */
+ for (; s>=cstart; s--, t--) *t=*s; /* shift whole coefficient right */
+ c=cstart;
+ *c++='0'; /* always starts with 0. */
+ *c++='.';
+ for (; pre<0; pre++) *c++='0'; /* add any 0's after '.' */
+ /*printf("res %s\n", string); */
+ return string;
+ } /* decimal128ToString */
+
+/* ------------------------------------------------------------------ */
+/* to-number -- conversion from numeric string */
+/* */
+/* decimal128FromString(result, string, set); */
+/* */
+/* result is the decimal128 format number which gets the result of */
+/* the conversion */
+/* *string is the character string which should contain a valid */
+/* number (which may be a special value) */
+/* set is the context */
+/* */
+/* The context is supplied to this routine is used for error handling */
+/* (setting of status and traps) and for the rounding mode, only. */
+/* If an error occurs, the result will be a valid decimal128 NaN. */
+/* ------------------------------------------------------------------ */
+decimal128 * decimal128FromString(decimal128 *result, const char *string,
+ decContext *set) {
+ decContext dc; /* work */
+ decNumber dn; /* .. */
+
+ decContextDefault(&dc, DEC_INIT_DECIMAL128); /* no traps, please */
+ dc.round=set->round; /* use supplied rounding */
+
+ decNumberFromString(&dn, string, &dc); /* will round if needed */
+ decimal128FromNumber(result, &dn, &dc);
+ if (dc.status!=0) { /* something happened */
+ decContextSetStatus(set, dc.status); /* .. pass it on */
+ }
+ return result;
+ } /* decimal128FromString */
+
+/* ------------------------------------------------------------------ */
+/* decimal128IsCanonical -- test whether encoding is canonical */
+/* d128 is the source decimal128 */
+/* returns 1 if the encoding of d128 is canonical, 0 otherwise */
+/* No error is possible. */
+/* ------------------------------------------------------------------ */
+uint32_t decimal128IsCanonical(const decimal128 *d128) {
+ decNumber dn; /* work */
+ decimal128 canon; /* .. */
+ decContext dc; /* .. */
+ decContextDefault(&dc, DEC_INIT_DECIMAL128);
+ decimal128ToNumber(d128, &dn);
+ decimal128FromNumber(&canon, &dn, &dc);/* canon will now be canonical */
+ return memcmp(d128, &canon, DECIMAL128_Bytes)==0;
+ } /* decimal128IsCanonical */
+
+/* ------------------------------------------------------------------ */
+/* decimal128Canonical -- copy an encoding, ensuring it is canonical */
+/* d128 is the source decimal128 */
+/* result is the target (may be the same decimal128) */
+/* returns result */
+/* No error is possible. */
+/* ------------------------------------------------------------------ */
+decimal128 * decimal128Canonical(decimal128 *result, const decimal128 *d128) {
+ decNumber dn; /* work */
+ decContext dc; /* .. */
+ decContextDefault(&dc, DEC_INIT_DECIMAL128);
+ decimal128ToNumber(d128, &dn);
+ decimal128FromNumber(result, &dn, &dc);/* result will now be canonical */
+ return result;
+ } /* decimal128Canonical */
+
+#if DECTRACE || DECCHECK
+/* Macros for accessing decimal128 fields. These assume the argument
+ is a reference (pointer) to the decimal128 structure, and the
+ decimal128 is in network byte order (big-endian) */
+/* Get sign */
+#define decimal128Sign(d) ((unsigned)(d)->bytes[0]>>7)
+
+/* Get combination field */
+#define decimal128Comb(d) (((d)->bytes[0] & 0x7c)>>2)
+
+/* Get exponent continuation [does not remove bias] */
+#define decimal128ExpCon(d) ((((d)->bytes[0] & 0x03)<<10) \
+ | ((unsigned)(d)->bytes[1]<<2) \
+ | ((unsigned)(d)->bytes[2]>>6))
+
+/* Set sign [this assumes sign previously 0] */
+#define decimal128SetSign(d, b) { \
+ (d)->bytes[0]|=((unsigned)(b)<<7);}
+
+/* Set exponent continuation [does not apply bias] */
+/* This assumes range has been checked and exponent previously 0; */
+/* type of exponent must be unsigned */
+#define decimal128SetExpCon(d, e) { \
+ (d)->bytes[0]|=(uint8_t)((e)>>10); \
+ (d)->bytes[1] =(uint8_t)(((e)&0x3fc)>>2); \
+ (d)->bytes[2]|=(uint8_t)(((e)&0x03)<<6);}
+
+/* ------------------------------------------------------------------ */
+/* decimal128Show -- display a decimal128 in hexadecimal [debug aid] */
+/* d128 -- the number to show */
+/* ------------------------------------------------------------------ */
+/* Also shows sign/cob/expconfields extracted */
+void decimal128Show(const decimal128 *d128) {
+ char buf[DECIMAL128_Bytes*2+1];
+ Int i, j=0;
+
+ if (DECLITEND) {
+ for (i=0; i<DECIMAL128_Bytes; i++, j+=2) {
+ sprintf(&buf[j], "%02x", d128->bytes[15-i]);
+ }
+ printf(" D128> %s [S:%d Cb:%02x Ec:%02x] LittleEndian\n", buf,
+ d128->bytes[15]>>7, (d128->bytes[15]>>2)&0x1f,
+ ((d128->bytes[15]&0x3)<<10)|(d128->bytes[14]<<2)|
+ (d128->bytes[13]>>6));
+ }
+ else {
+ for (i=0; i<DECIMAL128_Bytes; i++, j+=2) {
+ sprintf(&buf[j], "%02x", d128->bytes[i]);
+ }
+ printf(" D128> %s [S:%d Cb:%02x Ec:%02x] BigEndian\n", buf,
+ decimal128Sign(d128), decimal128Comb(d128),
+ decimal128ExpCon(d128));
+ }
+ } /* decimal128Show */
+#endif