From ba3930777a5ea818cd55e7db3f341e1e4327e7fc Mon Sep 17 00:00:00 2001
From: Stephen Henry <stephenry@gmail.com>
Date: Mon, 18 May 2020 13:10:32 +0100
Subject: [PATCH] Support display/scan %u/%z (#2324) (#2332)

---
 include/verilated.cpp                  |   91 +-
 src/V3EmitC.cpp                        |    2 +
 test_regress/t/t_sys_file_basic_uz.dat |  Bin 0 -> 15360 bytes
 test_regress/t/t_sys_file_basic_uz.out | 2048 ++++++++++++++++++++++++
 test_regress/t/t_sys_file_basic_uz.pl  |   27 +
 test_regress/t/t_sys_file_basic_uz.v   |  137 ++
 6 files changed, 2278 insertions(+), 27 deletions(-)
 create mode 100644 test_regress/t/t_sys_file_basic_uz.dat
 create mode 100644 test_regress/t/t_sys_file_basic_uz.out
 create mode 100755 test_regress/t/t_sys_file_basic_uz.pl
 create mode 100644 test_regress/t/t_sys_file_basic_uz.v

diff --git a/include/verilated.cpp b/include/verilated.cpp
index cf9a8e909..a393404ce 100644
--- a/include/verilated.cpp
+++ b/include/verilated.cpp
@@ -846,25 +846,22 @@ void _vl_vsformat(std::string& output, const char* formatp, va_list ap) VL_MT_SA
                                    + ((VL_BITISSETLIMIT_W(lwp, lbits, lsb + 2)) ? 4 : 0));
                     }
                     break;
-                case 'u':  // Packed 2-state
-                    output.reserve(output.size() + 4 * VL_WORDS_I(lbits));
-                    for (int i = 0; i < VL_WORDS_I(lbits); ++i) {
-                        output += static_cast<char>((lwp[i]) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 8) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 16) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 24) & 0xff);
-                    }
-                    break;
-                case 'z':  // Packed 4-state
-                    output.reserve(output.size() + 8 * VL_WORDS_I(lbits));
-                    for (int i = 0; i < VL_WORDS_I(lbits); ++i) {
-                        output += static_cast<char>((lwp[i]) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 8) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 16) & 0xff);
-                        output += static_cast<char>((lwp[i] >> 24) & 0xff);
-                        output += "\0\0\0\0";  // No tristate
+                case 'u':
+                case 'z': {  // Packed 4-state
+                    const bool is_4_state = (fmt == 'z');
+                    output.reserve(output.size() + ((is_4_state ? 2 : 1) * VL_WORDS_I(lbits)));
+                    int bytes_to_go = VL_BYTES_I(lbits);
+                    int bit = 0;
+                    while (bytes_to_go > 0) {
+                        const int wr_bytes = std::min(4, bytes_to_go);
+                        for (int byte = 0; byte < wr_bytes; byte++, bit += 8)
+                            output += static_cast<char>(VL_BITRSHIFT_W(lwp, bit) & 0xff);
+                        output.append(4 - wr_bytes, (char)0);
+                        if (is_4_state) output.append(4, (char)0);
+                        bytes_to_go -= wr_bytes;
                     }
                     break;
+                }
                 case 'v':  // Strength; assume always strong
                     for (lsb = lbits - 1; lsb >= 0; --lsb) {
                         if (VL_BITRSHIFT_W(lwp, lsb) & 1) {
@@ -932,8 +929,8 @@ static inline void _vl_vsss_skipspace(FILE* fp, int& floc, WDataInP fromp,
         _vl_vsss_advance(fp, floc);
     }
 }
-static inline void _vl_vsss_read(FILE* fp, int& floc, WDataInP fromp, const std::string& fstr,
-                                 char* tmpp, const char* acceptp) VL_MT_SAFE {
+static inline void _vl_vsss_read_str(FILE* fp, int& floc, WDataInP fromp, const std::string& fstr,
+                                     char* tmpp, const char* acceptp) VL_MT_SAFE {
     // Read into tmp, consisting of characters from acceptp list
     char* cp = tmpp;
     while (true) {
@@ -947,6 +944,19 @@ static inline void _vl_vsss_read(FILE* fp, int& floc, WDataInP fromp, const std:
     *cp++ = '\0';
     // VL_DBG_MSGF(" _read got='"<<tmpp<<"'\n");
 }
+static inline char* _vl_vsss_read_bin(FILE* fp, int& floc, WDataInP fromp, const std::string& fstr,
+                                      char* beginp, std::size_t n, bool inhibit = false) {
+    // Variant of _vl_vsss_read_str using the same underlying I/O functions but optimized
+    // specifically for block reads of N bytes (read operations are not demarcated by
+    // whitespace). In the fp case, except descriptor to have been opened in binary mode.
+    while (n-- > 0) {
+        const int c = _vl_vsss_peek(fp, floc, fromp, fstr);
+        if (c == EOF) return NULL;
+        if (!inhibit) *beginp++ = c;
+        _vl_vsss_advance(fp, floc);
+    }
+    return beginp;
+}
 static inline void _vl_vsss_setbit(WDataOutP owp, int obits, int lsb, int nbits,
                                    IData ld) VL_MT_SAFE {
     for (; nbits && lsb < obits; nbits--, lsb++, ld >>= 1) {
@@ -1045,7 +1055,7 @@ IData _vl_vsscanf(FILE* fp,  // If a fscanf
                 }
                 case 's': {
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, NULL);
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, NULL);
                     if (!tmp[0]) goto done;
                     int lpos = (static_cast<int>(strlen(tmp))) - 1;
                     int lsb = 0;
@@ -1057,7 +1067,7 @@ IData _vl_vsscanf(FILE* fp,  // If a fscanf
                 }
                 case 'd': {  // Signed decimal
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "0123456789+-xXzZ?_");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "0123456789+-xXzZ?_");
                     if (!tmp[0]) goto done;
                     vlsint64_t ld;
                     sscanf(tmp, "%30" VL_PRI64 "d", &ld);
@@ -1068,7 +1078,7 @@ IData _vl_vsscanf(FILE* fp,  // If a fscanf
                 case 'e':
                 case 'g': {  // Real number
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "+-.0123456789eE");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "+-.0123456789eE");
                     if (!tmp[0]) goto done;
                     // cppcheck-suppress unusedStructMember  // It's used
                     union {
@@ -1082,7 +1092,7 @@ IData _vl_vsscanf(FILE* fp,  // If a fscanf
                 case 't':  // FALLTHRU  // Time
                 case '#': {  // Unsigned decimal
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "0123456789+-xXzZ?_");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "0123456789+-xXzZ?_");
                     if (!tmp[0]) goto done;
                     QData ld;
                     sscanf(tmp, "%30" VL_PRI64 "u", &ld);
@@ -1091,25 +1101,52 @@ IData _vl_vsscanf(FILE* fp,  // If a fscanf
                 }
                 case 'b': {
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "01xXzZ?_");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "01xXzZ?_");
                     if (!tmp[0]) goto done;
                     _vl_vsss_based(owp, obits, 1, tmp, 0, strlen(tmp));
                     break;
                 }
                 case 'o': {
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "01234567xXzZ?_");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "01234567xXzZ?_");
                     if (!tmp[0]) goto done;
                     _vl_vsss_based(owp, obits, 3, tmp, 0, strlen(tmp));
                     break;
                 }
                 case 'x': {
                     _vl_vsss_skipspace(fp, floc, fromp, fstr);
-                    _vl_vsss_read(fp, floc, fromp, fstr, tmp, "0123456789abcdefABCDEFxXzZ?_");
+                    _vl_vsss_read_str(fp, floc, fromp, fstr, tmp, "0123456789abcdefABCDEFxXzZ?_");
                     if (!tmp[0]) goto done;
                     _vl_vsss_based(owp, obits, 4, tmp, 0, strlen(tmp));
                     break;
                 }
+                case 'u': {
+                    // Read packed 2-value binary data
+                    const int bytes = VL_BYTES_I(obits);
+                    char* out = reinterpret_cast<char*>(owp);
+                    if (!_vl_vsss_read_bin(fp, floc, fromp, fstr, out, bytes)) goto done;
+                    const int last = bytes % 4;
+                    if (last != 0
+                        && !_vl_vsss_read_bin(fp, floc, fromp, fstr, out, 4 - last, true))
+                        goto done;
+                    break;
+                }
+                case 'z': {
+                    // Read packed 4-value binary data
+                    char* out = reinterpret_cast<char*>(owp);
+                    int bytes = VL_BYTES_I(obits);
+                    while (bytes > 0) {
+                        const int abytes = std::min(4, bytes);
+                        // aval (4B) read {0, 1} state
+                        out = _vl_vsss_read_bin(fp, floc, fromp, fstr, out, abytes);
+                        if (!out) goto done;
+                        // bval (4B) disregard {X, Z} state and align to new 8B boundary.
+                        out = _vl_vsss_read_bin(fp, floc, fromp, fstr, out, 8 - abytes, true);
+                        if (!out) goto done;
+                        bytes -= abytes;
+                    }
+                    break;
+                }
                 default:
                     std::string msg = std::string("Unknown _vl_vsscanf code: ") + pos[0];
                     VL_FATAL_MT(__FILE__, __LINE__, "", msg.c_str());
@@ -1336,7 +1373,7 @@ void VL_FWRITEF(IData fpi, const char* formatp, ...) VL_MT_SAFE {
     const int n = VerilatedImp::fdToFp(fpi, fp, 30);
     for (std::size_t i = 0; i < n; i++) {
         if (VL_UNLIKELY(!fp[i])) continue;
-        fputs(output.c_str(), fp[i]);
+        fwrite(output.c_str(), 1, output.size(), fp[i]);
     }
 }
 
diff --git a/src/V3EmitC.cpp b/src/V3EmitC.cpp
index 4746d908a..be35cc98f 100644
--- a/src/V3EmitC.cpp
+++ b/src/V3EmitC.cpp
@@ -2182,6 +2182,8 @@ void EmitCStmts::displayNode(AstNode* nodep, AstScopeName* scopenamep, const str
             case 'g': displayArg(nodep, &elistp, isScan, vfmt, ignore, 'g'); break;
             case '^': displayArg(nodep, &elistp, isScan, vfmt, ignore, '^'); break;  // Realtime
             case 'v': displayArg(nodep, &elistp, isScan, vfmt, ignore, 'v'); break;
+            case 'u': displayArg(nodep, &elistp, isScan, vfmt, ignore, 'u'); break;
+            case 'z': displayArg(nodep, &elistp, isScan, vfmt, ignore, 'z'); break;
             case 'm': {
                 UASSERT_OBJ(scopenamep, nodep, "Display with %m but no AstScopeName");
                 string suffix = scopenamep->scopePrettySymName();
diff --git a/test_regress/t/t_sys_file_basic_uz.dat b/test_regress/t/t_sys_file_basic_uz.dat
new file mode 100644
index 0000000000000000000000000000000000000000..03a38c52b14d43a57955406d3dd2d511eda00486
GIT binary patch
literal 15360
zcmXw;cNmak7l&1RvNze;*?X_-?2x^(H`zszy~$o7gzUXnb_gM4hwQyq`0o3C&+lC4
zT=)At?{)tCJ<oa0nP7qmCg?zPBsvij5)%>sBPJ#~6O#~=5|a^=6H^dV5>pXV6VnjW
z64MdW6EhGq5;GB9h?$95h*^o*h}nrbh&hR_#9YMO#5}~j#C*j3!~#S&VnJddVqszt
zVo_o-VsT;#Vo72tVrgO-Vp(E2VtHZ(Vnt#lVr60#VpU=_Vs)ZBu?Ddwu@<p5u@12=
zu^!QbSfAK{*pS$W*qGRa*p%o=Y({KOY(exQwj{P9wkEbAwk5VBwkLKVb|iKpb|!ig
zyAZn)yAit+dk}jPdl7pR`w;sQ`w{yS2M`Am2N8XUgNZ|kLy5zP!-*q^BZ<C5KjJ9j
zXrezcfH;OYmKaDJM;uR_K%7XNM4U{VLYzvRMx0KZL7YjPMVw8XLkuF$CC($xCoUi^
zBrYN@CN3c^B`zZ_Ck7K&5LXgc5krWpiED^!iJ`=G#P!4t#4zGU;wIu|;uhjo;x^)T
z;tt|Y;x6KD;vV8&;y&Vj;sN48;vwQ;;t}Fe;xXcJVmR>x@g(sS@ig%a@htHiF@kuW
zc!7A47)iWDyiB}8j3QnoUL#&7MiXxkZxU}2V~DqjcZhe1_lWn24~P$mvBXEj$HXVZ
zIO0>{GvagN3*t-SE8=V78{%8yJK}rd2jWNKC*o(~7vfjqH{y5V58_YaFXC@vJn;|l
zFYzCt_&an&|DDkPgy?@F^#4EfKQa36jQ%G<|C6Hs$<Y7g=zj|IKPCE~3jI%w{-;6z
z)1v?B(Es%4e+KkFBl@2S{dYnCGo$}m(EqIHe>U_#JNlmk{m+U1yQ2TO(Er@%e;)Kd
zFZ!Pk{m+m77eN2r(Eozye<Ae0F#2Bv{V$6C7eoJxqyHt)|B~o`DfGWI`d<e9FN^+{
zL;uU8{}s^xis*kO^uIFtUj_ZIivCwa|Er__?&yCF^uH$hUkm-OjsDj`|Ldav_0WG0
z^uIp(-vIq@i2gT1{~M$KP0;_Q=)WiW-wge4j{dhm|Gm)vmgs*g^uIOw-v<3}i~hGm
z|J$Sg9nk-d=zk~lzcc#pjsAB*|GT39-O&H;=zkCNzbE?N3;pkn{`W!u`=bB-(EtAE
z{{ZxVAo@QD{r5rt2c!Q((Ep+6|1k7_IQl;V{U3?``=bAT=>I76e>D2<kNyXs|6|bq
zvFLvw`acf+ACLY|K>sJA|C7-F$>{$S^nWV)KMnn#j{eU;|7W8Av(W$9=>Ht_KM4Jw
zi~i3;|L3Fs3()_C=>H=0e=+*M1pQx%{x3uSm!to|=>H1ze<k|A3jGg3|5u~`Yta9-
z=zl2szYhIhkN$5!|HIJ#jp+X-^nWw@zXko@ivDjy|F@(6JJA1~=>IPCe>eKS2mRlR
z{_jKo_oM#@(Eo$z{~`4MF#3N4{XdHSA4C6-qyORP{|WT}B>H~}{XdQVpF#i6qW|a6
z{|NN|Jo<kD{lAF*N233i(ErQm{}uE<3jM!|{$E4?ucQCb=>HA$|0eo>3;mBl|8JxJ
zchLX4=>I+R|33Qv0R4Z6{>P&KkI?_e=>HS+KMwtWivB-C|DU7(FVO#&=>IG9|26vm
z2K|4F{=Y;2-=qH@(EpF<|0neSGy4Ap{r`&oe?$MjqyIn9|DWjpFZBO6`X7(}|3Ux%
zqW}M*|BjtHbnG-CJ`w&ud}6#aJ_$Z4J{dkaJ_SA{J{3MSJ`FxCJ{>+iJ_9}@J`>&r
zpBbM8pB0}CpB<kApA+wj&xOy8&x6m4&xg;CFMxN$7sMCB7seOC7sVID7sr>tm&BLC
zm&TXDm&KREm&aGYSHxGsSH@StSH)MuSI4{KYv60*YvF6->)`9+>)}1{_3;hx4e^ce
zjqy$JP4S-iX87j#7I-gwOMEMQYkV7gTYNiwdwd6cM|>xIXS_GQ3%)D98@@Zf2fio1
z7rr;X556zHAHF|+0Dd5T5Z(tr7(WC*6h90<96tg-67P%m!;iv`#{1&~@MG{}@qzep
z`0@A&_=)&Q_{sPw_^J45`04l=_?h@w_}Tb5_#pgT{5<@8`~v(!{385f{1W_9{4)G<
zd@z0mekFbtJ_NrSzXrb+ABtaxUyt8_55sT7Z^CcJZ^3WHZ^LiL@4)ZG@51lK@4@fI
z@5ArMAHW~PAHpBTAHg5RAHyHVhvQG+PvTGEPvg(v&*IPFBk<?(7w{MHk@!pa%lIq!
zDEw9YHT-paH2wzuCjJ&a27eoW2Y(lT4}Ty30RIpli+_ZFjDLcU!#~A8!#~Hrz`w-5
z!oSA9!N0}7!@tLWz<<Pl!hgnp!GFbn!+*#B!2iVm!vDs{<Nx6Q;{W05zXRS8SN0PZ
zI=8FNlQf%%-+!I~g~{91<Wn@890vaLOejp<uBM)*+2nBWpJzm2`gS$_49zBoh5tM=
z3SHV&mzkSQ4iEo%h7@LNSF_FDY;u_R&oiaawOw_ctJ&mm@t<c*VcvE%?|jWBhmHR{
za|+$sRksD3O%5Obc?K00X;+IZ+H7(d`Oh<{utd9BV##Kc!^wZ1QH5pN)iTRAn;cgD
z^UNx&(5_ZkvDxJC@}Fl|VU>2Z%BsyKhnfF8(+b_&RrfWTO%6BzdBzpiZdYrs(`<6s
z`Oh=2(4$@TSijli@bjN%U}2+nwb91SCWoQ_JQE8&+f~oanoSNz|9M6hdbO)wTQ-{<
zmj3h1ENs)Rw%NAX<nZ*LXJ}!EcD2Kf%_fJb|2$I*z1vmqU7Ae}SO0m&7Itq}yYJC#
za@hLMGq<pJyV`r7W|PC$f1bgG{oB?42Q-@;#{Tn6F7#<veGYCmIh_6H8C^K6T^)9K
zv&muYKhNw!-*(lvU$e>K?LW`(LjQKve?YUzVeUWA^uoY)HSoA*lf&JAp7Dhf+trCD
zHJcpv{`1T)oZ7BVJ+0Z~@b{m0K;g`Gb>>;kCYOQ#yb}t8+SQ<Qn@uhU|9M9gE@)R5
zT-a=KS@_R8qi{*Py5!Pklgq<@-XVp-?P~B9%_f(L|GZNQL)z7ltD8+O7yo(36o$5|
zq1QE=TsHpm&M6FQSHo^>Ho1KK=N(kIrCr@}YqQB^<UjAE!X54Ejys!8E+_waM-}dA
zSNGi8Y;sxo&pWH|K)ZV2!Df@o%YWWsg-6=eBab$lTxS0BPAd#=SHquZHo4sV=N(sg
zx?Mf}OtZ;l=Rfbf!iaV?;`wHi%g=w_frXLnYUE4JCYPcAyb}wf+SRC6n@ui9|9M9i
zMz^ccZ#0`+mj3h3ER1PaW8Q8yxjg;n9a?y=UA^~yv&m)ZKkwAS*mgDcqh^!K)qmcx
zg>mg_+^5YZm#zQ2a|>Uzt1rH6Ho1KL=N(-5rd@sWZL`T`>_6}1!Vm50haa0wE@%IF
zM;Cr+SHJw)Y;sxq&pW&DN4xst&t{X$+kf8Sh4Jlb{6Ebmm%0DE(+kx3t|sVE=-940
zc4{`c-2LYrU-;hyWgUtgi=B!S7AGnuVd7eME>2RMv^ZID^5PW5DT`ATr!G!YoVGY!
zar)v6#Tkn;6}uE?F3wV%wK!XG_Tn7HIg4G3a~0<<&QqMXIA3x8;sV8P#RZEC6&Efp
zQe3pSSaI><62&EpOBI(cE>m2#xLk4h;tItTiz^jZF0N8swYXYw^<wwp8pSn>YZccn
zu2WpMxL&bGasA>3#SM!a6*n$!QrxuIv$$Dt^Wql8Ud1hoTNSr1Zd2U0xLtAk;ts_f
zi#ru}F7__&Qrxw;TXFZ|9>qP2dlmOC?o-^ixL<Mq;sM12iw70^6b~*QQarSHSn=@U
z5yc~meT)5yM-`7Q_Ad@79#cHFIIwtJ@%Z8i#S@Ds6;CdnQarVITJiMa8O1Y;XBE#b
zo>LrDJhymW@%-Wi#S4oU6)!GcQoOWyS@H7X;Nlg<D~neZhZL_aUQ@ibIJ9_O@%rKo
z#bL!8i#HW-F5XhSwRl_c_TnAIJBxP}?=Id`ytjB?@&4ii#RrQI6(24>Qhc=dSn=`V
z@ZuB2CyP%NpDsRAe75*paYXU?;tRzWizACK6<;pCQXEx$wfI``_2TH_8^t$^ZxzQB
z-!8sWe7E>s@%`cl#Se>Piysv~E`CxRSNyd2S@HAY7sW4&UlqSDepCFm_+9b);t$0i
zi$4{AF8)&dwfI}{_u?PLKZ}1A|1OR%{!{$7_+POZ{_*V$KywbDISbI72WZX&H0J`E
zvjNTdfaZ)qb55W+E6|)5XwD2Y=LVXy1I_t?<_tk|j-WY9(3~e|&J;A~3YxP8&G~}n
zj6rkGpgC*MoHuCB95m+++MHb*H1h|)oIz;LAv9+Zn)3+FnS|zCLUT5uIiJv+QE1L7
zG-nl>^9s$Gh34Esb9SLQztEgvXwES-XBnFF49%H_=3GN_wxK!S(428-&N(z^9h&nF
z&6$Vh+(TQvdxK{F;g>TI%{hqXEJSl2qB#@MoQr7AMl|Omnllp3If>@1L~~xEIWy6m
zn`q8XH0LLpGZf7^ismdubDp9(Q_-BOXwFtN=PQ~s7R@<}=B!0?-l92k(VV+zJNItT
z%wPO+2BSHL(VWF-&SNxZGMaN4&Do6Rd`5FdqdBM1oYiQ~YcyvznsXb?*^TD>MstRv
zImgkQ<!H`xG-o=Ra~;juj@Gwd%YH|-bk3tW>(TlTXgT1Rmd<^&V+S^9=0AQp1JaxW
zY0iQ)=Ruk?A<emv=4?oFKBPG#(wq}%&WbeWMVd1s&AE~0>_~Hdq&Y*<oFi$@k~HT@
znlmNMxsv8=NprrWIb+hCGilD6H0Mp4GbhctlXlgR2F?7*FK1Aib12POl;%82b0(!Z
zm(rX~Y0jrKXH=SVD$QAy=DbRCW~Di|(wtps&aX6QSekPz%~_V_JWF$?r8(EqoNZ~&
zw=`#5nsYAAS(oO#OLOL>Irq{YAKsvufBEGMOmhyVISbRAhiT5lH0NTPvoX#2nC6U3
zb55o?E7P2pY0k_v=VqF-GtK##<_t}9j;1+F)10Si&eSyLYMQe(&H0+<j7@XSra5cV
zoVRJt+%)HI+J|EsH1jvVoWW_%;WTG)n)5i#nVjZaPIES=IiJ&<(P_@<G-q|1^E%C$
zo#xz5b9SdWztf!IY0mL9XL*|QJk6P&=3Gy6wx>DY)12{XfBoI^@9{02_i4`jG~WM>
z6}<R6xnWa4+8dDe|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;
z+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZ
zY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|Cjdv
zrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khw
zm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNly
zU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*
ze`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK
z|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^
z|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t
z|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq
z{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd
z_Wz~*e`)_;+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;
z+W(jK|E2wZY5!l^|CjdvrTu?t|6khwm-hdq{eNlyU)ukd_Wz~*e`)_;+W(jK|E2wZ
zY5!l^|CjdvrTu?t|6khwm-hc<)BlI||26yn(*D29{hxb2bwKX>)C0NqQy1j^PhRSP
z<fR@+Uh0D6r9Mbr>V)K_UPxZ*hUBGwNM7oQ<fWcSUh0bErM^gB>Wt*2-bh~Rj^w5O
zNM7oY<fR@-Uh0zMr9Mes>XhWAUP)f+mgJ>=NnYxh<fWcTUh10UrM^jC>YU`I-br5S
zp5&$eNnYxp<fR@;Uh1Ocr9Mht>ZIhQUP@l-rsSo5N?z)y<fWcUUh1mkrM^mD>a66Y
z-b!BTuH>cuN?z))<fR@<Uh1;sr9Mku>a^sgUQ1r;w&bOLOJ3@@<fWcVUh2B!rM^pE
z>b&Ho-b-HUzT~C;OJ3^0<fR@=Uh2Z+r9Mnv>cr%wUQAx<#^j}bOkV29<fWcWUh2x^
zrM^sF>dfS&-b`NV&g7;3OkV2H<fR@>Uh2~1r9Mqw>eS?=UQJ%=*5svrO<wBQ<fWcX
zUh3N9rM^vG>fGd|-c4TW-sGkJO<wBY<fR@?Uh3lHr9Mtx>g435UQS->=H#V*PG0Kh
z<fWcYUh3-PrM^yH>g?pD-cDZX?&PKZPG0Kp<fR@@Uh4AXr9Mwy>h$ELUQb@?_T;60
zPhRTy<fWcZUh4YfrM^#I>ip!T-cMfY{^X_pPhQ>u$;*2nd3hHkFYklo<(-hcycd#}
zcSG{>en?*45y{JYB6)dNBrora<mH`_yu3G(mv=|<^8QF(-XY1$dn9>zmn1LmljP-{
zlDxcEl9zW&^74L3Ufwau%X=nydDkQ_@0;Z1os+!0caoQPPxA8qNnYMT$;*2vd3hHl
zFYlw|<(-tgyqA)fcT@86eo9{6QOV1DDtUQVB`@!*<mH`}yu7!Pmv>k4^8QL*-eJkh
zdn|c*mnARnv*hKSmb|>zl9zW|^74L5UfyxZ%X=<)dDkT`@4MvXotM14_mY=)U-I()
zOJ3fA$;*2%d3hHmFYm+T<(-(kycd&~cVqJMeoS88k;%(@GI@DdCNJ;H<mH{2yu3G)
zmv?9K^8QR--l56Mdo+1@mnJXo)8yryn!LPMlb3gE^74L7Uf!|E%X>C?dDkW{@7v_%
zotwP8caxWQZ}Rf~O<vx?$;*2<d3hHnFYn{z<(-_oyqA-gcXRUceokKA(aFnuI(d0l
zCok{o<mH{6yu7!Qmv?va^8QX<-r>p1dpvo0mnSdp^W^27p1i!*lb3gU^74L9Uf%J^
P%R4@KdB-O&@A&@%<<{}j

literal 0
HcmV?d00001

diff --git a/test_regress/t/t_sys_file_basic_uz.out b/test_regress/t/t_sys_file_basic_uz.out
new file mode 100644
index 000000000..6cd8f845b
--- /dev/null
+++ b/test_regress/t/t_sys_file_basic_uz.out
@@ -0,0 +1,2048 @@
+00
+01
+02
+03
+04
+05
+06
+07
+08
+09
+0a
+0b
+0c
+0d
+0e
+0f
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+1a
+1b
+1c
+1d
+1e
+1f
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+2a
+2b
+2c
+2d
+2e
+2f
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+3a
+3b
+3c
+3d
+3e
+3f
+40
+41
+42
+43
+44
+45
+46
+47
+48
+49
+4a
+4b
+4c
+4d
+4e
+4f
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+5a
+5b
+5c
+5d
+5e
+5f
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+6a
+6b
+6c
+6d
+6e
+6f
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+7a
+7b
+7c
+7d
+7e
+7f
+80
+81
+82
+83
+84
+85
+86
+87
+88
+89
+8a
+8b
+8c
+8d
+8e
+8f
+90
+91
+92
+93
+94
+95
+96
+97
+98
+99
+9a
+9b
+9c
+9d
+9e
+9f
+a0
+a1
+a2
+a3
+a4
+a5
+a6
+a7
+a8
+a9
+aa
+ab
+ac
+ad
+ae
+af
+b0
+b1
+b2
+b3
+b4
+b5
+b6
+b7
+b8
+b9
+ba
+bb
+bc
+bd
+be
+bf
+c0
+c1
+c2
+c3
+c4
+c5
+c6
+c7
+c8
+c9
+ca
+cb
+cc
+cd
+ce
+cf
+d0
+d1
+d2
+d3
+d4
+d5
+d6
+d7
+d8
+d9
+da
+db
+dc
+dd
+de
+df
+e0
+e1
+e2
+e3
+e4
+e5
+e6
+e7
+e8
+e9
+ea
+eb
+ec
+ed
+ee
+ef
+f0
+f1
+f2
+f3
+f4
+f5
+f6
+f7
+f8
+f9
+fa
+fb
+fc
+fd
+fe
+ff
+0100
+0201
+0302
+0403
+0504
+0605
+0706
+0807
+0908
+0a09
+0b0a
+0c0b
+0d0c
+0e0d
+0f0e
+100f
+1110
+1211
+1312
+1413
+1514
+1615
+1716
+1817
+1918
+1a19
+1b1a
+1c1b
+1d1c
+1e1d
+1f1e
+201f
+2120
+2221
+2322
+2423
+2524
+2625
+2726
+2827
+2928
+2a29
+2b2a
+2c2b
+2d2c
+2e2d
+2f2e
+302f
+3130
+3231
+3332
+3433
+3534
+3635
+3736
+3837
+3938
+3a39
+3b3a
+3c3b
+3d3c
+3e3d
+3f3e
+403f
+4140
+4241
+4342
+4443
+4544
+4645
+4746
+4847
+4948
+4a49
+4b4a
+4c4b
+4d4c
+4e4d
+4f4e
+504f
+5150
+5251
+5352
+5453
+5554
+5655
+5756
+5857
+5958
+5a59
+5b5a
+5c5b
+5d5c
+5e5d
+5f5e
+605f
+6160
+6261
+6362
+6463
+6564
+6665
+6766
+6867
+6968
+6a69
+6b6a
+6c6b
+6d6c
+6e6d
+6f6e
+706f
+7170
+7271
+7372
+7473
+7574
+7675
+7776
+7877
+7978
+7a79
+7b7a
+7c7b
+7d7c
+7e7d
+7f7e
+807f
+8180
+8281
+8382
+8483
+8584
+8685
+8786
+8887
+8988
+8a89
+8b8a
+8c8b
+8d8c
+8e8d
+8f8e
+908f
+9190
+9291
+9392
+9493
+9594
+9695
+9796
+9897
+9998
+9a99
+9b9a
+9c9b
+9d9c
+9e9d
+9f9e
+a09f
+a1a0
+a2a1
+a3a2
+a4a3
+a5a4
+a6a5
+a7a6
+a8a7
+a9a8
+aaa9
+abaa
+acab
+adac
+aead
+afae
+b0af
+b1b0
+b2b1
+b3b2
+b4b3
+b5b4
+b6b5
+b7b6
+b8b7
+b9b8
+bab9
+bbba
+bcbb
+bdbc
+bebd
+bfbe
+c0bf
+c1c0
+c2c1
+c3c2
+c4c3
+c5c4
+c6c5
+c7c6
+c8c7
+c9c8
+cac9
+cbca
+cccb
+cdcc
+cecd
+cfce
+d0cf
+d1d0
+d2d1
+d3d2
+d4d3
+d5d4
+d6d5
+d7d6
+d8d7
+d9d8
+dad9
+dbda
+dcdb
+dddc
+dedd
+dfde
+e0df
+e1e0
+e2e1
+e3e2
+e4e3
+e5e4
+e6e5
+e7e6
+e8e7
+e9e8
+eae9
+ebea
+eceb
+edec
+eeed
+efee
+f0ef
+f1f0
+f2f1
+f3f2
+f4f3
+f5f4
+f6f5
+f7f6
+f8f7
+f9f8
+faf9
+fbfa
+fcfb
+fdfc
+fefd
+fffe
+00ff
+03020100
+04030201
+05040302
+06050403
+07060504
+08070605
+09080706
+0a090807
+0b0a0908
+0c0b0a09
+0d0c0b0a
+0e0d0c0b
+0f0e0d0c
+100f0e0d
+11100f0e
+1211100f
+13121110
+14131211
+15141312
+16151413
+17161514
+18171615
+19181716
+1a191817
+1b1a1918
+1c1b1a19
+1d1c1b1a
+1e1d1c1b
+1f1e1d1c
+201f1e1d
+21201f1e
+2221201f
+23222120
+24232221
+25242322
+26252423
+27262524
+28272625
+29282726
+2a292827
+2b2a2928
+2c2b2a29
+2d2c2b2a
+2e2d2c2b
+2f2e2d2c
+302f2e2d
+31302f2e
+3231302f
+33323130
+34333231
+35343332
+36353433
+37363534
+38373635
+39383736
+3a393837
+3b3a3938
+3c3b3a39
+3d3c3b3a
+3e3d3c3b
+3f3e3d3c
+403f3e3d
+41403f3e
+4241403f
+43424140
+44434241
+45444342
+46454443
+47464544
+48474645
+49484746
+4a494847
+4b4a4948
+4c4b4a49
+4d4c4b4a
+4e4d4c4b
+4f4e4d4c
+504f4e4d
+51504f4e
+5251504f
+53525150
+54535251
+55545352
+56555453
+57565554
+58575655
+59585756
+5a595857
+5b5a5958
+5c5b5a59
+5d5c5b5a
+5e5d5c5b
+5f5e5d5c
+605f5e5d
+61605f5e
+6261605f
+63626160
+64636261
+65646362
+66656463
+67666564
+68676665
+69686766
+6a696867
+6b6a6968
+6c6b6a69
+6d6c6b6a
+6e6d6c6b
+6f6e6d6c
+706f6e6d
+71706f6e
+7271706f
+73727170
+74737271
+75747372
+76757473
+77767574
+78777675
+79787776
+7a797877
+7b7a7978
+7c7b7a79
+7d7c7b7a
+7e7d7c7b
+7f7e7d7c
+807f7e7d
+81807f7e
+8281807f
+83828180
+84838281
+85848382
+86858483
+87868584
+88878685
+89888786
+8a898887
+8b8a8988
+8c8b8a89
+8d8c8b8a
+8e8d8c8b
+8f8e8d8c
+908f8e8d
+91908f8e
+9291908f
+93929190
+94939291
+95949392
+96959493
+97969594
+98979695
+99989796
+9a999897
+9b9a9998
+9c9b9a99
+9d9c9b9a
+9e9d9c9b
+9f9e9d9c
+a09f9e9d
+a1a09f9e
+a2a1a09f
+a3a2a1a0
+a4a3a2a1
+a5a4a3a2
+a6a5a4a3
+a7a6a5a4
+a8a7a6a5
+a9a8a7a6
+aaa9a8a7
+abaaa9a8
+acabaaa9
+adacabaa
+aeadacab
+afaeadac
+b0afaead
+b1b0afae
+b2b1b0af
+b3b2b1b0
+b4b3b2b1
+b5b4b3b2
+b6b5b4b3
+b7b6b5b4
+b8b7b6b5
+b9b8b7b6
+bab9b8b7
+bbbab9b8
+bcbbbab9
+bdbcbbba
+bebdbcbb
+bfbebdbc
+c0bfbebd
+c1c0bfbe
+c2c1c0bf
+c3c2c1c0
+c4c3c2c1
+c5c4c3c2
+c6c5c4c3
+c7c6c5c4
+c8c7c6c5
+c9c8c7c6
+cac9c8c7
+cbcac9c8
+cccbcac9
+cdcccbca
+cecdcccb
+cfcecdcc
+d0cfcecd
+d1d0cfce
+d2d1d0cf
+d3d2d1d0
+d4d3d2d1
+d5d4d3d2
+d6d5d4d3
+d7d6d5d4
+d8d7d6d5
+d9d8d7d6
+dad9d8d7
+dbdad9d8
+dcdbdad9
+dddcdbda
+dedddcdb
+dfdedddc
+e0dfdedd
+e1e0dfde
+e2e1e0df
+e3e2e1e0
+e4e3e2e1
+e5e4e3e2
+e6e5e4e3
+e7e6e5e4
+e8e7e6e5
+e9e8e7e6
+eae9e8e7
+ebeae9e8
+ecebeae9
+edecebea
+eeedeceb
+efeeedec
+f0efeeed
+f1f0efee
+f2f1f0ef
+f3f2f1f0
+f4f3f2f1
+f5f4f3f2
+f6f5f4f3
+f7f6f5f4
+f8f7f6f5
+f9f8f7f6
+faf9f8f7
+fbfaf9f8
+fcfbfaf9
+fdfcfbfa
+fefdfcfb
+fffefdfc
+00fffefd
+0100fffe
+020100ff
+0706050403020100
+0807060504030201
+0908070605040302
+0a09080706050403
+0b0a090807060504
+0c0b0a0908070605
+0d0c0b0a09080706
+0e0d0c0b0a090807
+0f0e0d0c0b0a0908
+100f0e0d0c0b0a09
+11100f0e0d0c0b0a
+1211100f0e0d0c0b
+131211100f0e0d0c
+14131211100f0e0d
+1514131211100f0e
+161514131211100f
+1716151413121110
+1817161514131211
+1918171615141312
+1a19181716151413
+1b1a191817161514
+1c1b1a1918171615
+1d1c1b1a19181716
+1e1d1c1b1a191817
+1f1e1d1c1b1a1918
+201f1e1d1c1b1a19
+21201f1e1d1c1b1a
+2221201f1e1d1c1b
+232221201f1e1d1c
+24232221201f1e1d
+2524232221201f1e
+262524232221201f
+2726252423222120
+2827262524232221
+2928272625242322
+2a29282726252423
+2b2a292827262524
+2c2b2a2928272625
+2d2c2b2a29282726
+2e2d2c2b2a292827
+2f2e2d2c2b2a2928
+302f2e2d2c2b2a29
+31302f2e2d2c2b2a
+3231302f2e2d2c2b
+333231302f2e2d2c
+34333231302f2e2d
+3534333231302f2e
+363534333231302f
+3736353433323130
+3837363534333231
+3938373635343332
+3a39383736353433
+3b3a393837363534
+3c3b3a3938373635
+3d3c3b3a39383736
+3e3d3c3b3a393837
+3f3e3d3c3b3a3938
+403f3e3d3c3b3a39
+41403f3e3d3c3b3a
+4241403f3e3d3c3b
+434241403f3e3d3c
+44434241403f3e3d
+4544434241403f3e
+464544434241403f
+4746454443424140
+4847464544434241
+4948474645444342
+4a49484746454443
+4b4a494847464544
+4c4b4a4948474645
+4d4c4b4a49484746
+4e4d4c4b4a494847
+4f4e4d4c4b4a4948
+504f4e4d4c4b4a49
+51504f4e4d4c4b4a
+5251504f4e4d4c4b
+535251504f4e4d4c
+54535251504f4e4d
+5554535251504f4e
+565554535251504f
+5756555453525150
+5857565554535251
+5958575655545352
+5a59585756555453
+5b5a595857565554
+5c5b5a5958575655
+5d5c5b5a59585756
+5e5d5c5b5a595857
+5f5e5d5c5b5a5958
+605f5e5d5c5b5a59
+61605f5e5d5c5b5a
+6261605f5e5d5c5b
+636261605f5e5d5c
+64636261605f5e5d
+6564636261605f5e
+666564636261605f
+6766656463626160
+6867666564636261
+6968676665646362
+6a69686766656463
+6b6a696867666564
+6c6b6a6968676665
+6d6c6b6a69686766
+6e6d6c6b6a696867
+6f6e6d6c6b6a6968
+706f6e6d6c6b6a69
+71706f6e6d6c6b6a
+7271706f6e6d6c6b
+737271706f6e6d6c
+74737271706f6e6d
+7574737271706f6e
+767574737271706f
+7776757473727170
+7877767574737271
+7978777675747372
+7a79787776757473
+7b7a797877767574
+7c7b7a7978777675
+7d7c7b7a79787776
+7e7d7c7b7a797877
+7f7e7d7c7b7a7978
+807f7e7d7c7b7a79
+81807f7e7d7c7b7a
+8281807f7e7d7c7b
+838281807f7e7d7c
+84838281807f7e7d
+8584838281807f7e
+868584838281807f
+8786858483828180
+8887868584838281
+8988878685848382
+8a89888786858483
+8b8a898887868584
+8c8b8a8988878685
+8d8c8b8a89888786
+8e8d8c8b8a898887
+8f8e8d8c8b8a8988
+908f8e8d8c8b8a89
+91908f8e8d8c8b8a
+9291908f8e8d8c8b
+939291908f8e8d8c
+94939291908f8e8d
+9594939291908f8e
+969594939291908f
+9796959493929190
+9897969594939291
+9998979695949392
+9a99989796959493
+9b9a999897969594
+9c9b9a9998979695
+9d9c9b9a99989796
+9e9d9c9b9a999897
+9f9e9d9c9b9a9998
+a09f9e9d9c9b9a99
+a1a09f9e9d9c9b9a
+a2a1a09f9e9d9c9b
+a3a2a1a09f9e9d9c
+a4a3a2a1a09f9e9d
+a5a4a3a2a1a09f9e
+a6a5a4a3a2a1a09f
+a7a6a5a4a3a2a1a0
+a8a7a6a5a4a3a2a1
+a9a8a7a6a5a4a3a2
+aaa9a8a7a6a5a4a3
+abaaa9a8a7a6a5a4
+acabaaa9a8a7a6a5
+adacabaaa9a8a7a6
+aeadacabaaa9a8a7
+afaeadacabaaa9a8
+b0afaeadacabaaa9
+b1b0afaeadacabaa
+b2b1b0afaeadacab
+b3b2b1b0afaeadac
+b4b3b2b1b0afaead
+b5b4b3b2b1b0afae
+b6b5b4b3b2b1b0af
+b7b6b5b4b3b2b1b0
+b8b7b6b5b4b3b2b1
+b9b8b7b6b5b4b3b2
+bab9b8b7b6b5b4b3
+bbbab9b8b7b6b5b4
+bcbbbab9b8b7b6b5
+bdbcbbbab9b8b7b6
+bebdbcbbbab9b8b7
+bfbebdbcbbbab9b8
+c0bfbebdbcbbbab9
+c1c0bfbebdbcbbba
+c2c1c0bfbebdbcbb
+c3c2c1c0bfbebdbc
+c4c3c2c1c0bfbebd
+c5c4c3c2c1c0bfbe
+c6c5c4c3c2c1c0bf
+c7c6c5c4c3c2c1c0
+c8c7c6c5c4c3c2c1
+c9c8c7c6c5c4c3c2
+cac9c8c7c6c5c4c3
+cbcac9c8c7c6c5c4
+cccbcac9c8c7c6c5
+cdcccbcac9c8c7c6
+cecdcccbcac9c8c7
+cfcecdcccbcac9c8
+d0cfcecdcccbcac9
+d1d0cfcecdcccbca
+d2d1d0cfcecdcccb
+d3d2d1d0cfcecdcc
+d4d3d2d1d0cfcecd
+d5d4d3d2d1d0cfce
+d6d5d4d3d2d1d0cf
+d7d6d5d4d3d2d1d0
+d8d7d6d5d4d3d2d1
+d9d8d7d6d5d4d3d2
+dad9d8d7d6d5d4d3
+dbdad9d8d7d6d5d4
+dcdbdad9d8d7d6d5
+dddcdbdad9d8d7d6
+dedddcdbdad9d8d7
+dfdedddcdbdad9d8
+e0dfdedddcdbdad9
+e1e0dfdedddcdbda
+e2e1e0dfdedddcdb
+e3e2e1e0dfdedddc
+e4e3e2e1e0dfdedd
+e5e4e3e2e1e0dfde
+e6e5e4e3e2e1e0df
+e7e6e5e4e3e2e1e0
+e8e7e6e5e4e3e2e1
+e9e8e7e6e5e4e3e2
+eae9e8e7e6e5e4e3
+ebeae9e8e7e6e5e4
+ecebeae9e8e7e6e5
+edecebeae9e8e7e6
+eeedecebeae9e8e7
+efeeedecebeae9e8
+f0efeeedecebeae9
+f1f0efeeedecebea
+f2f1f0efeeedeceb
+f3f2f1f0efeeedec
+f4f3f2f1f0efeeed
+f5f4f3f2f1f0efee
+f6f5f4f3f2f1f0ef
+f7f6f5f4f3f2f1f0
+f8f7f6f5f4f3f2f1
+f9f8f7f6f5f4f3f2
+faf9f8f7f6f5f4f3
+fbfaf9f8f7f6f5f4
+fcfbfaf9f8f7f6f5
+fdfcfbfaf9f8f7f6
+fefdfcfbfaf9f8f7
+fffefdfcfbfaf9f8
+00fffefdfcfbfaf9
+0100fffefdfcfbfa
+020100fffefdfcfb
+03020100fffefdfc
+0403020100fffefd
+050403020100fffe
+06050403020100ff
+00
+01
+02
+03
+04
+05
+06
+07
+08
+09
+0a
+0b
+0c
+0d
+0e
+0f
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+1a
+1b
+1c
+1d
+1e
+1f
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+2a
+2b
+2c
+2d
+2e
+2f
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+3a
+3b
+3c
+3d
+3e
+3f
+40
+41
+42
+43
+44
+45
+46
+47
+48
+49
+4a
+4b
+4c
+4d
+4e
+4f
+50
+51
+52
+53
+54
+55
+56
+57
+58
+59
+5a
+5b
+5c
+5d
+5e
+5f
+60
+61
+62
+63
+64
+65
+66
+67
+68
+69
+6a
+6b
+6c
+6d
+6e
+6f
+70
+71
+72
+73
+74
+75
+76
+77
+78
+79
+7a
+7b
+7c
+7d
+7e
+7f
+80
+81
+82
+83
+84
+85
+86
+87
+88
+89
+8a
+8b
+8c
+8d
+8e
+8f
+90
+91
+92
+93
+94
+95
+96
+97
+98
+99
+9a
+9b
+9c
+9d
+9e
+9f
+a0
+a1
+a2
+a3
+a4
+a5
+a6
+a7
+a8
+a9
+aa
+ab
+ac
+ad
+ae
+af
+b0
+b1
+b2
+b3
+b4
+b5
+b6
+b7
+b8
+b9
+ba
+bb
+bc
+bd
+be
+bf
+c0
+c1
+c2
+c3
+c4
+c5
+c6
+c7
+c8
+c9
+ca
+cb
+cc
+cd
+ce
+cf
+d0
+d1
+d2
+d3
+d4
+d5
+d6
+d7
+d8
+d9
+da
+db
+dc
+dd
+de
+df
+e0
+e1
+e2
+e3
+e4
+e5
+e6
+e7
+e8
+e9
+ea
+eb
+ec
+ed
+ee
+ef
+f0
+f1
+f2
+f3
+f4
+f5
+f6
+f7
+f8
+f9
+fa
+fb
+fc
+fd
+fe
+ff
+0100
+0201
+0302
+0403
+0504
+0605
+0706
+0807
+0908
+0a09
+0b0a
+0c0b
+0d0c
+0e0d
+0f0e
+100f
+1110
+1211
+1312
+1413
+1514
+1615
+1716
+1817
+1918
+1a19
+1b1a
+1c1b
+1d1c
+1e1d
+1f1e
+201f
+2120
+2221
+2322
+2423
+2524
+2625
+2726
+2827
+2928
+2a29
+2b2a
+2c2b
+2d2c
+2e2d
+2f2e
+302f
+3130
+3231
+3332
+3433
+3534
+3635
+3736
+3837
+3938
+3a39
+3b3a
+3c3b
+3d3c
+3e3d
+3f3e
+403f
+4140
+4241
+4342
+4443
+4544
+4645
+4746
+4847
+4948
+4a49
+4b4a
+4c4b
+4d4c
+4e4d
+4f4e
+504f
+5150
+5251
+5352
+5453
+5554
+5655
+5756
+5857
+5958
+5a59
+5b5a
+5c5b
+5d5c
+5e5d
+5f5e
+605f
+6160
+6261
+6362
+6463
+6564
+6665
+6766
+6867
+6968
+6a69
+6b6a
+6c6b
+6d6c
+6e6d
+6f6e
+706f
+7170
+7271
+7372
+7473
+7574
+7675
+7776
+7877
+7978
+7a79
+7b7a
+7c7b
+7d7c
+7e7d
+7f7e
+807f
+8180
+8281
+8382
+8483
+8584
+8685
+8786
+8887
+8988
+8a89
+8b8a
+8c8b
+8d8c
+8e8d
+8f8e
+908f
+9190
+9291
+9392
+9493
+9594
+9695
+9796
+9897
+9998
+9a99
+9b9a
+9c9b
+9d9c
+9e9d
+9f9e
+a09f
+a1a0
+a2a1
+a3a2
+a4a3
+a5a4
+a6a5
+a7a6
+a8a7
+a9a8
+aaa9
+abaa
+acab
+adac
+aead
+afae
+b0af
+b1b0
+b2b1
+b3b2
+b4b3
+b5b4
+b6b5
+b7b6
+b8b7
+b9b8
+bab9
+bbba
+bcbb
+bdbc
+bebd
+bfbe
+c0bf
+c1c0
+c2c1
+c3c2
+c4c3
+c5c4
+c6c5
+c7c6
+c8c7
+c9c8
+cac9
+cbca
+cccb
+cdcc
+cecd
+cfce
+d0cf
+d1d0
+d2d1
+d3d2
+d4d3
+d5d4
+d6d5
+d7d6
+d8d7
+d9d8
+dad9
+dbda
+dcdb
+dddc
+dedd
+dfde
+e0df
+e1e0
+e2e1
+e3e2
+e4e3
+e5e4
+e6e5
+e7e6
+e8e7
+e9e8
+eae9
+ebea
+eceb
+edec
+eeed
+efee
+f0ef
+f1f0
+f2f1
+f3f2
+f4f3
+f5f4
+f6f5
+f7f6
+f8f7
+f9f8
+faf9
+fbfa
+fcfb
+fdfc
+fefd
+fffe
+00ff
+03020100
+04030201
+05040302
+06050403
+07060504
+08070605
+09080706
+0a090807
+0b0a0908
+0c0b0a09
+0d0c0b0a
+0e0d0c0b
+0f0e0d0c
+100f0e0d
+11100f0e
+1211100f
+13121110
+14131211
+15141312
+16151413
+17161514
+18171615
+19181716
+1a191817
+1b1a1918
+1c1b1a19
+1d1c1b1a
+1e1d1c1b
+1f1e1d1c
+201f1e1d
+21201f1e
+2221201f
+23222120
+24232221
+25242322
+26252423
+27262524
+28272625
+29282726
+2a292827
+2b2a2928
+2c2b2a29
+2d2c2b2a
+2e2d2c2b
+2f2e2d2c
+302f2e2d
+31302f2e
+3231302f
+33323130
+34333231
+35343332
+36353433
+37363534
+38373635
+39383736
+3a393837
+3b3a3938
+3c3b3a39
+3d3c3b3a
+3e3d3c3b
+3f3e3d3c
+403f3e3d
+41403f3e
+4241403f
+43424140
+44434241
+45444342
+46454443
+47464544
+48474645
+49484746
+4a494847
+4b4a4948
+4c4b4a49
+4d4c4b4a
+4e4d4c4b
+4f4e4d4c
+504f4e4d
+51504f4e
+5251504f
+53525150
+54535251
+55545352
+56555453
+57565554
+58575655
+59585756
+5a595857
+5b5a5958
+5c5b5a59
+5d5c5b5a
+5e5d5c5b
+5f5e5d5c
+605f5e5d
+61605f5e
+6261605f
+63626160
+64636261
+65646362
+66656463
+67666564
+68676665
+69686766
+6a696867
+6b6a6968
+6c6b6a69
+6d6c6b6a
+6e6d6c6b
+6f6e6d6c
+706f6e6d
+71706f6e
+7271706f
+73727170
+74737271
+75747372
+76757473
+77767574
+78777675
+79787776
+7a797877
+7b7a7978
+7c7b7a79
+7d7c7b7a
+7e7d7c7b
+7f7e7d7c
+807f7e7d
+81807f7e
+8281807f
+83828180
+84838281
+85848382
+86858483
+87868584
+88878685
+89888786
+8a898887
+8b8a8988
+8c8b8a89
+8d8c8b8a
+8e8d8c8b
+8f8e8d8c
+908f8e8d
+91908f8e
+9291908f
+93929190
+94939291
+95949392
+96959493
+97969594
+98979695
+99989796
+9a999897
+9b9a9998
+9c9b9a99
+9d9c9b9a
+9e9d9c9b
+9f9e9d9c
+a09f9e9d
+a1a09f9e
+a2a1a09f
+a3a2a1a0
+a4a3a2a1
+a5a4a3a2
+a6a5a4a3
+a7a6a5a4
+a8a7a6a5
+a9a8a7a6
+aaa9a8a7
+abaaa9a8
+acabaaa9
+adacabaa
+aeadacab
+afaeadac
+b0afaead
+b1b0afae
+b2b1b0af
+b3b2b1b0
+b4b3b2b1
+b5b4b3b2
+b6b5b4b3
+b7b6b5b4
+b8b7b6b5
+b9b8b7b6
+bab9b8b7
+bbbab9b8
+bcbbbab9
+bdbcbbba
+bebdbcbb
+bfbebdbc
+c0bfbebd
+c1c0bfbe
+c2c1c0bf
+c3c2c1c0
+c4c3c2c1
+c5c4c3c2
+c6c5c4c3
+c7c6c5c4
+c8c7c6c5
+c9c8c7c6
+cac9c8c7
+cbcac9c8
+cccbcac9
+cdcccbca
+cecdcccb
+cfcecdcc
+d0cfcecd
+d1d0cfce
+d2d1d0cf
+d3d2d1d0
+d4d3d2d1
+d5d4d3d2
+d6d5d4d3
+d7d6d5d4
+d8d7d6d5
+d9d8d7d6
+dad9d8d7
+dbdad9d8
+dcdbdad9
+dddcdbda
+dedddcdb
+dfdedddc
+e0dfdedd
+e1e0dfde
+e2e1e0df
+e3e2e1e0
+e4e3e2e1
+e5e4e3e2
+e6e5e4e3
+e7e6e5e4
+e8e7e6e5
+e9e8e7e6
+eae9e8e7
+ebeae9e8
+ecebeae9
+edecebea
+eeedeceb
+efeeedec
+f0efeeed
+f1f0efee
+f2f1f0ef
+f3f2f1f0
+f4f3f2f1
+f5f4f3f2
+f6f5f4f3
+f7f6f5f4
+f8f7f6f5
+f9f8f7f6
+faf9f8f7
+fbfaf9f8
+fcfbfaf9
+fdfcfbfa
+fefdfcfb
+fffefdfc
+00fffefd
+0100fffe
+020100ff
+0706050403020100
+0807060504030201
+0908070605040302
+0a09080706050403
+0b0a090807060504
+0c0b0a0908070605
+0d0c0b0a09080706
+0e0d0c0b0a090807
+0f0e0d0c0b0a0908
+100f0e0d0c0b0a09
+11100f0e0d0c0b0a
+1211100f0e0d0c0b
+131211100f0e0d0c
+14131211100f0e0d
+1514131211100f0e
+161514131211100f
+1716151413121110
+1817161514131211
+1918171615141312
+1a19181716151413
+1b1a191817161514
+1c1b1a1918171615
+1d1c1b1a19181716
+1e1d1c1b1a191817
+1f1e1d1c1b1a1918
+201f1e1d1c1b1a19
+21201f1e1d1c1b1a
+2221201f1e1d1c1b
+232221201f1e1d1c
+24232221201f1e1d
+2524232221201f1e
+262524232221201f
+2726252423222120
+2827262524232221
+2928272625242322
+2a29282726252423
+2b2a292827262524
+2c2b2a2928272625
+2d2c2b2a29282726
+2e2d2c2b2a292827
+2f2e2d2c2b2a2928
+302f2e2d2c2b2a29
+31302f2e2d2c2b2a
+3231302f2e2d2c2b
+333231302f2e2d2c
+34333231302f2e2d
+3534333231302f2e
+363534333231302f
+3736353433323130
+3837363534333231
+3938373635343332
+3a39383736353433
+3b3a393837363534
+3c3b3a3938373635
+3d3c3b3a39383736
+3e3d3c3b3a393837
+3f3e3d3c3b3a3938
+403f3e3d3c3b3a39
+41403f3e3d3c3b3a
+4241403f3e3d3c3b
+434241403f3e3d3c
+44434241403f3e3d
+4544434241403f3e
+464544434241403f
+4746454443424140
+4847464544434241
+4948474645444342
+4a49484746454443
+4b4a494847464544
+4c4b4a4948474645
+4d4c4b4a49484746
+4e4d4c4b4a494847
+4f4e4d4c4b4a4948
+504f4e4d4c4b4a49
+51504f4e4d4c4b4a
+5251504f4e4d4c4b
+535251504f4e4d4c
+54535251504f4e4d
+5554535251504f4e
+565554535251504f
+5756555453525150
+5857565554535251
+5958575655545352
+5a59585756555453
+5b5a595857565554
+5c5b5a5958575655
+5d5c5b5a59585756
+5e5d5c5b5a595857
+5f5e5d5c5b5a5958
+605f5e5d5c5b5a59
+61605f5e5d5c5b5a
+6261605f5e5d5c5b
+636261605f5e5d5c
+64636261605f5e5d
+6564636261605f5e
+666564636261605f
+6766656463626160
+6867666564636261
+6968676665646362
+6a69686766656463
+6b6a696867666564
+6c6b6a6968676665
+6d6c6b6a69686766
+6e6d6c6b6a696867
+6f6e6d6c6b6a6968
+706f6e6d6c6b6a69
+71706f6e6d6c6b6a
+7271706f6e6d6c6b
+737271706f6e6d6c
+74737271706f6e6d
+7574737271706f6e
+767574737271706f
+7776757473727170
+7877767574737271
+7978777675747372
+7a79787776757473
+7b7a797877767574
+7c7b7a7978777675
+7d7c7b7a79787776
+7e7d7c7b7a797877
+7f7e7d7c7b7a7978
+807f7e7d7c7b7a79
+81807f7e7d7c7b7a
+8281807f7e7d7c7b
+838281807f7e7d7c
+84838281807f7e7d
+8584838281807f7e
+868584838281807f
+8786858483828180
+8887868584838281
+8988878685848382
+8a89888786858483
+8b8a898887868584
+8c8b8a8988878685
+8d8c8b8a89888786
+8e8d8c8b8a898887
+8f8e8d8c8b8a8988
+908f8e8d8c8b8a89
+91908f8e8d8c8b8a
+9291908f8e8d8c8b
+939291908f8e8d8c
+94939291908f8e8d
+9594939291908f8e
+969594939291908f
+9796959493929190
+9897969594939291
+9998979695949392
+9a99989796959493
+9b9a999897969594
+9c9b9a9998979695
+9d9c9b9a99989796
+9e9d9c9b9a999897
+9f9e9d9c9b9a9998
+a09f9e9d9c9b9a99
+a1a09f9e9d9c9b9a
+a2a1a09f9e9d9c9b
+a3a2a1a09f9e9d9c
+a4a3a2a1a09f9e9d
+a5a4a3a2a1a09f9e
+a6a5a4a3a2a1a09f
+a7a6a5a4a3a2a1a0
+a8a7a6a5a4a3a2a1
+a9a8a7a6a5a4a3a2
+aaa9a8a7a6a5a4a3
+abaaa9a8a7a6a5a4
+acabaaa9a8a7a6a5
+adacabaaa9a8a7a6
+aeadacabaaa9a8a7
+afaeadacabaaa9a8
+b0afaeadacabaaa9
+b1b0afaeadacabaa
+b2b1b0afaeadacab
+b3b2b1b0afaeadac
+b4b3b2b1b0afaead
+b5b4b3b2b1b0afae
+b6b5b4b3b2b1b0af
+b7b6b5b4b3b2b1b0
+b8b7b6b5b4b3b2b1
+b9b8b7b6b5b4b3b2
+bab9b8b7b6b5b4b3
+bbbab9b8b7b6b5b4
+bcbbbab9b8b7b6b5
+bdbcbbbab9b8b7b6
+bebdbcbbbab9b8b7
+bfbebdbcbbbab9b8
+c0bfbebdbcbbbab9
+c1c0bfbebdbcbbba
+c2c1c0bfbebdbcbb
+c3c2c1c0bfbebdbc
+c4c3c2c1c0bfbebd
+c5c4c3c2c1c0bfbe
+c6c5c4c3c2c1c0bf
+c7c6c5c4c3c2c1c0
+c8c7c6c5c4c3c2c1
+c9c8c7c6c5c4c3c2
+cac9c8c7c6c5c4c3
+cbcac9c8c7c6c5c4
+cccbcac9c8c7c6c5
+cdcccbcac9c8c7c6
+cecdcccbcac9c8c7
+cfcecdcccbcac9c8
+d0cfcecdcccbcac9
+d1d0cfcecdcccbca
+d2d1d0cfcecdcccb
+d3d2d1d0cfcecdcc
+d4d3d2d1d0cfcecd
+d5d4d3d2d1d0cfce
+d6d5d4d3d2d1d0cf
+d7d6d5d4d3d2d1d0
+d8d7d6d5d4d3d2d1
+d9d8d7d6d5d4d3d2
+dad9d8d7d6d5d4d3
+dbdad9d8d7d6d5d4
+dcdbdad9d8d7d6d5
+dddcdbdad9d8d7d6
+dedddcdbdad9d8d7
+dfdedddcdbdad9d8
+e0dfdedddcdbdad9
+e1e0dfdedddcdbda
+e2e1e0dfdedddcdb
+e3e2e1e0dfdedddc
+e4e3e2e1e0dfdedd
+e5e4e3e2e1e0dfde
+e6e5e4e3e2e1e0df
+e7e6e5e4e3e2e1e0
+e8e7e6e5e4e3e2e1
+e9e8e7e6e5e4e3e2
+eae9e8e7e6e5e4e3
+ebeae9e8e7e6e5e4
+ecebeae9e8e7e6e5
+edecebeae9e8e7e6
+eeedecebeae9e8e7
+efeeedecebeae9e8
+f0efeeedecebeae9
+f1f0efeeedecebea
+f2f1f0efeeedeceb
+f3f2f1f0efeeedec
+f4f3f2f1f0efeeed
+f5f4f3f2f1f0efee
+f6f5f4f3f2f1f0ef
+f7f6f5f4f3f2f1f0
+f8f7f6f5f4f3f2f1
+f9f8f7f6f5f4f3f2
+faf9f8f7f6f5f4f3
+fbfaf9f8f7f6f5f4
+fcfbfaf9f8f7f6f5
+fdfcfbfaf9f8f7f6
+fefdfcfbfaf9f8f7
+fffefdfcfbfaf9f8
+00fffefdfcfbfaf9
+0100fffefdfcfbfa
+020100fffefdfcfb
+03020100fffefdfc
+0403020100fffefd
+050403020100fffe
+06050403020100ff
diff --git a/test_regress/t/t_sys_file_basic_uz.pl b/test_regress/t/t_sys_file_basic_uz.pl
new file mode 100755
index 000000000..e2be86bfc
--- /dev/null
+++ b/test_regress/t/t_sys_file_basic_uz.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/env perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+scenarios(simulator => 1);
+
+unlink("$Self->{obj_dir}/t_sys_file_basic_uz_test.log");
+
+compile();
+
+execute(
+    check_finished => 1,
+    );
+
+files_identical("$Self->{obj_dir}/t_sys_file_basic_uz_test.log", $Self->{golden_filename});
+
+files_identical("$Self->{obj_dir}/t_sys_file_basic_uz_test.bin",
+                "$Self->{t_dir}/t_sys_file_basic_uz.dat");
+
+ok(1);
+1;
diff --git a/test_regress/t/t_sys_file_basic_uz.v b/test_regress/t/t_sys_file_basic_uz.v
new file mode 100644
index 000000000..a407299f1
--- /dev/null
+++ b/test_regress/t/t_sys_file_basic_uz.v
@@ -0,0 +1,137 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2030 by Stephen Henry.
+// SPDX-License-Identifier: CC0-1.0
+
+module t;
+
+  int fdin_bin, fdout_txt, fdout_bin;
+`define STRINGIFY(x) `"x`"
+
+`define checkh(gotv,expv) \
+  do if ((gotv) !== (expv)) begin\
+      $write("%%Error: %s:%0d:  got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv));\
+   end while(0)
+
+  //
+  //
+  task automatic test1; begin
+    for (int i = 0; i < 256; i++) begin
+      byte actual, expected;
+      expected  = i[7:0];
+      $fscanf(fdin_bin, "%u", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%u", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      shortint actual, expected;
+      for (int j = 0; j < 2; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%u", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%u", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      int actual, expected;
+      for (int j = 0; j < 4; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%u", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%u", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      longint actual, expected;
+      for (int j = 0; j < 8; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%u", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%u", actual);
+    end
+  end endtask
+
+  //
+  //
+  task automatic test2; begin
+    for (int i = 0; i < 256; i++) begin
+      byte actual, expected;
+      expected  = i[7:0];
+      $fscanf(fdin_bin, "%z", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%z", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      shortint actual, expected;
+      for (int j = 0; j < 2; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%z", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%z", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      int actual, expected;
+      for (int j = 0; j < 4; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%z", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%z", actual);
+    end
+
+    for (int i = 0; i < 256; i++) begin
+      longint actual, expected;
+      for (int j = 0; j < 8; j++)
+        expected[(8 * j)+:8]  = i[7:0] + j[7:0];
+      $fscanf(fdin_bin, "%z", actual);
+      `checkh(actual, expected);
+      $fdisplay(fdout_txt, "%h", actual);
+      $fwrite(fdout_bin, "%z", actual);
+    end
+  end endtask
+
+  initial begin : main_PROC
+
+    string filename;
+
+    filename  = "t/t_sys_file_basic_uz.dat";
+    fdin_bin  = $fopen(filename, "rb");
+
+`ifdef IVERILOG
+    filename  = $sformatf("%s/t_sys_file_basic_uz_test.log","obj_iv/t_sys_file_basic_uz");
+`else
+    filename  = $sformatf("%s/t_sys_file_basic_uz_test.log",`STRINGIFY(`TEST_OBJ_DIR));
+`endif
+    fdout_txt  = $fopen(filename, "w");
+
+`ifdef IVERILOG
+    filename  = $sformatf("%s/t_sys_file_basic_uz_test.bin","obj_iv/t_sys_file_basic_uz");
+`else
+    filename  = $sformatf("%s/t_sys_file_basic_uz_test.bin",`STRINGIFY(`TEST_OBJ_DIR));
+`endif
+    $display(filename);
+    fdout_bin  = $fopen(filename, "wb");
+
+    test1;
+    test2;
+
+    $fclose(fdin_bin);
+    $fclose(fdout_txt);
+
+    $write("*-* All Finished *-*\n");
+    $finish(0);  // Test arguments to finish
+
+  end // block: main_PROC
+
+`undef STRINGIFY
+endmodule // t