Added tracing for floating point operations.

Some DTR handling was still inside of such #ifdefs, and thus
I was unable to make a modem work on a serial port.  I believe
this code is portable to OSX, Linux, FreeBSD, and Solaris.

devamlc.h

@@ -1,4 +1,4 @@
-/* 
+/*
   Implements the AMLC subsystem for Primos.  In earlier versions
   (r186), a more hardware-centric implementation was used that closely
   followed the design of Prime's real AMLC board.  For example, every
@@ -52,9 +52,9 @@
   NOTE: varying the AMLC poll rates dynamically is the default, but
         this can lead to unpredictable performance.  If consistent,
         predictable performance is more important than absolute
-        performance, MAXAMLCSPEEDUP can be set to 1.  Then this 
+        performance, MAXAMLCSPEEDUP can be set to 1.  Then this
         implementation will function more or less like a real Prime.
-    
+
 
   AMLC I/O operations:
 
@@ -133,7 +133,7 @@
 AMLC status word (from AMLCT5):
 
      BITS                 DESCRIPTION
-  
+
       1                   END OF RANGE INTERRUPT
       2                   CLOCK RUNNING
       3-6                 LINE # OF LINE WHOSE DATA SET STATUS HAS CHANGED
@@ -150,6 +150,8 @@ AMLC status word (from AMLCT5):
 
 */
 
+#include <termio.h>
+
 /* this macro closes an AMLC connection - used in several places
 
    NOTE: don't print disconnect message on dedicated lines */
@@ -202,11 +204,11 @@ int devamlc (int class, int func, int device) {
 #define DSSCOUNTDOWN 25
 
   /* connection types for each line.  This _doesn't_ imply the line is
-     actually connected, ie, an AMLC line may be tied to a specific 
+     actually connected, ie, an AMLC line may be tied to a specific
      serial device (like a USB->serial gizmo), but the USB device may
      not be plugged in.  The connection type would be CT_SERIAL but
      the line's fd would be -1 and the "connected" bit would be 0 */
-     
+
 #define CT_SOCKET 1
 #define CT_SERIAL 2
 #define CT_DEDIP 3
@@ -324,7 +326,7 @@ int devamlc (int class, int func, int device) {
       int tempport;
       struct hostent* host;
       char *p;
-  
+
       /* initially, we don't know about any AMLC boards */
 
       for (dx=0; dx<MAXBOARDS; dx++) {
@@ -346,7 +348,7 @@ int devamlc (int class, int func, int device) {
       /* read the amlc.cfg file.  This file has 3 uses:
 
          1. maps Prime async lines to real serial devices, like host
-            serial ports or USB serial boxes.  
+            serial ports or USB serial boxes.
 
             Format: <line #> /dev/<Unix usb device name>
 
@@ -418,7 +420,7 @@ int devamlc (int class, int func, int device) {
               fprintf(stderr,"Line %d of amlc.cfg ignored: IP address too long\n", lc);
               continue;
             }
-            
+
             /* break out host and port number; no port means this is
                an incoming dedicated line: no connects out.  With a
                port means we need to connect to it. */
@@ -553,13 +555,13 @@ int devamlc (int class, int func, int device) {
     /* XXX: this constant is redefined because of a bug in the
        OSX Prolific USB serial driver at version 1.2.1r2.  They should be
        turning on bit 0100, but are turning on 0x0100. */
-#define TIOCM_CD 0x0100    
+#define TIOCM_CD 0x0100
 
     if (func == 00) {             /* input Data Set Sense (carrier) */
       if (dc[dx].serial) {        /* any serial connections? */
         if (--dc[dx].dsstime == 0) {
           dc[dx].dsstime = DSSCOUNTDOWN;
-#ifdef __APPLE__
+/* #ifdef __APPLE__ */
           for (lx = 0; lx < 16; lx++) {  /* yes, poll them */
             if (dc[dx].ctype[lx] == CT_SERIAL) {
               int modemstate;
@@ -575,7 +577,7 @@ int devamlc (int class, int func, int device) {
               }
             }
           }
-#endif
+/* #endif */
         }
       }
       //printf("devamlc: dss for device '%o = 0x%x\n", device, dc[dx].dss);
@@ -634,10 +636,10 @@ int devamlc (int class, int func, int device) {
         }
         break;
 
-        
+
       case CT_SERIAL: {
         int fd;
-            
+
         /* setup line characteristics if they have changed (check for
            something other than DTR changing) */
 
@@ -707,7 +709,7 @@ int devamlc (int class, int func, int device) {
              1_0 - cts/rts flow control (2413 becomes 6413)
              1_1 - dsr/dtr flow control (2413 becomes 7413)
 
-             NOTE: bit 11 also appears to be free, but Primos doesn't 
+             NOTE: bit 11 also appears to be free, but Primos doesn't
              let it flow through to the AMLC controller. :(
           */
 
@@ -758,7 +760,6 @@ int devamlc (int class, int func, int device) {
 
         /* set DTR high (02000) or low if it has changed */
 
-#ifdef __APPLE__
         if ((getcrs16(A) ^ dc[dx].lconf[lx]) & 02000) {
           int modemstate;
           //printf("devamlc: DTR state changed\n");
@@ -771,7 +772,6 @@ int devamlc (int class, int func, int device) {
           }
           ioctl(fd, TIOCMSET, &modemstate);
         }
-#endif
         break;
       }
 
@@ -841,7 +841,7 @@ int devamlc (int class, int func, int device) {
     double ts;
     int neweor, activelines;
     //printf("poll device '%o, speedup=%5.2f, cti=%x, xmit=%x, recv=%x, dss=%x\n", device, pollspeedup, dc[dx].ctinterrupt, dc[dx].xmitenabled, dc[dx].recvenabled, dc[dx].dss);
-    
+
     /* check for 1 new telnet connection every AMLCACCEPTSECS seconds
        (10 times per second) */
 
@@ -1036,7 +1036,7 @@ int devamlc (int class, int func, int device) {
 
                 int fd, sockflags;
                 struct sockaddr_in raddr;
-  
+
                 dc[dx].obtimer[lx] = tv.tv_sec + AMLCCONNECT;
                 //printf("em: trying to connect to 0x%08x:%d\n", dc[dx].obhost[lx], dc[dx].obport[lx]); /***/
                 fd = socket(AF_INET, SOCK_STREAM, 0);
@@ -1121,7 +1121,7 @@ int devamlc (int class, int func, int device) {
     }
 
     /* process input, but only as much as will fit into the DMC
-       buffer.  
+       buffer.
 
        Because the size of the AMLC tumble tables is limited, this
        could pose a denial of service issue.  Input is processed in a

em.c

@@ -274,6 +274,7 @@ static void macheck (unsigned short p300vec, unsigned short chkvec, unsigned int
    T_EAV        trace V-mode effective address calculation
    T_EAI        trace I-mode effective address calculation
    T_FLOW       instruction summary
+   T_FP         floating point
    T_INST       detailed instruction trace
    T_MODE       trace CPU mode changes
    T_EAAP       AP effective address calculation
@@ -311,6 +312,7 @@ static void macheck (unsigned short p300vec, unsigned short chkvec, unsigned int
 #define T_EAS   0x00040000
 #define T_TLB   0x00080000
 #define T_SMLC  0x00100000
+#define T_FP    0x00200000
 
 #define BITMASK16(b) (0x8000 >> ((b)-1))
 #define BITMASK32(b) ((unsigned int)(0x80000000) >> ((b)-1))
@@ -4618,6 +4620,8 @@ int main (int argc, char **argv) {
           gv.traceflags |= T_TLB;
         else if (strcmp(argv[i],"smlc") == 0)
           gv.traceflags |= T_SMLC;
+        else if (strcmp(argv[i],"fp") == 0)
+          gv.traceflags |= T_FP;
         else if (isdigit(argv[i][0]) && strlen(argv[i]) <= 3 && sscanf(argv[i],"%d", &templ) == 1)
           gv.traceuser = 0100000 | (templ<<6);   /* form OWNERL for user # */
         else if (strlen(argv[i]) == 6 && sscanf(argv[i],"%o", &templ) == 1)

fp.h

@@ -40,6 +40,7 @@ http://tima-cmp.imag.fr/~guyot/Cours/Oparithm/english/Op_Ar2.htm
 
 inline void getdp (unsigned long long p, long long *frac64, int *exp32) {
 
+  TRACE(T_FP, "  getdp(%016llx)\n", p);
   *frac64 = p & 0xFFFFFFFFFFFF0000LL;  /* unpack fraction */
   *exp32 = (short) (p & 0xFFFFLL);     /* unpack SIGNED exponent */
 }
@@ -59,22 +60,29 @@ int prieee8(unsigned long long dp, double *d) {
   /* unpack Prime DPFP */
 
   getdp (dp, &frac64, &exp32);
+  TRACE(T_FP, "  prieee8: unpacked frac %016llx exp %08x\n", frac64, exp32);
 
   /* if negative, change to sign-magnitude */
 
   sign = 0;
   if (frac64 < 0) {
+    TRACE(T_FP, "  prieee8: changing to sign-magnitude\n");
 
     /* special case: negative power of 2 */
 
     if (frac64 == 0x8000000000000000LL) {
+      TRACE(T_FP, "  prieee8: frac is negative power of 2\n");
       exp32 += (1023-128);
       if (exp32 < 0 || exp32 > 0x7fe)
+      {
+        TRACE(T_FP, "  prieee8: exp %x out of range\n", exp32);
         return 0;
+      }
       frac64 |= ((long long)exp32 << 52);
       *d = *(double *)&frac64;
       return 1;
     } else {
+      TRACE(T_FP, "  prieee8: frac is just negative\n");
       sign = 0x8000000000000000LL;
       frac64 = -frac64;
     }
@@ -82,13 +90,15 @@ int prieee8(unsigned long long dp, double *d) {
   /* special case: zero */
 
   } else if (frac64 == 0) {
+    TRACE(T_FP, "  prieee8: frac is 0\n");
     *d = 0.0;
     return 1;
-  } 
+  }
 
   /* normalize positive fraction until bit 2 is 1 */
 
   while ((frac64 & 0x4000000000000000LL) == 0) {
+    TRACE(T_FP, "  prieee8: normalizing positive fraction\n");
     frac64 = frac64 << 1;
     exp32--;
   }
@@ -98,7 +108,10 @@ int prieee8(unsigned long long dp, double *d) {
   exp32 += (1023-128) - 1;
 #if 1
   if (exp32 < 0 || exp32 > 0x7fe)
+  {
+    TRACE(T_FP, "  prieee8: exponent %x out of range\n", exp32);
     return 0;
+  }
 #else
   if (exp32 < 0) {
     *d = 0.0;
@@ -113,6 +126,7 @@ int prieee8(unsigned long long dp, double *d) {
   /* pack into an IEEE DPFP, losing the leading 1 bit in the process */
 
   frac64 = sign | ((long long)exp32 << 52) | ((frac64 >> 10) & 0xfffffffffffffLL);
+  TRACE(T_FP, "  prieee8: packed ieee dpfp %016llx\n", frac64);
   *d = *(double *)&frac64;
   return 1;
 }
@@ -134,7 +148,7 @@ retry:
   neg = frac64 < 0;
   exp32 = (frac64 >> 52) & 0x7ff;
   frac64 &= 0xfffffffffffffLL;
-  //printf("dp=%llx, neg=%d, frac64=%llx, exp32=%d, \n", *(long long *)dp, neg, frac64, exp32);
+  TRACE(T_FP, "d=%016llx, neg=%x, frac64=%016llx, exp32=%08x, \n", (long long)d, neg, frac64, exp32);
 
   /* special case: NaN & +-infinity */
 
@@ -159,12 +173,21 @@ retry:
      and subnormal */
 
   if (exp32 != 0)           /* typical IEEE normalized */
+  {
+    TRACE(T_FP, "  ieeepr8: is normalized\n");
     frac64 |= 0x10000000000000LL;
-  else if (frac64 == 0) {   /* IEEE +-0.0 (zero exp+frac) */
+  }
+  else if (frac64 == 0)     /* IEEE +-0.0 (zero exp+frac) */
+  {
+    TRACE(T_FP, "  ieeepr8: zero exp and frac\n");
     *p = 0;                 /* IEEE and Prime zero are the same */
     return okay;
-  } else
+  }
+  else
+  {
+    TRACE(T_FP, "  ieeepr8: subnormal value\n");
       ;                     /* subnormal: no hidden 1 bit */
+  }
 
   /* adjust exponent, change sign-magnitude to 2's complement,
      and shift fraction into Prime placement (high 48 bits) */
@@ -173,12 +196,14 @@ retry:
   if (neg)
     frac64 = -frac64;
   frac64 <<= 10;
+  TRACE(T_FP, "  ieeepr8: de-biased prime-ised frac %016llx exp %08x\n", frac64, exp32);
 
   /* normalize Prime DPFP */
 
   while ((frac64 ^ (frac64 << 1)) >= 0) {
     frac64 = frac64 << 1;
     exp32--;
+    TRACE(T_FP, "  ieeepr8: normalized prime frac %016llx exp %08x\n", frac64, exp32);
   }
 
 #if 0
@@ -204,8 +229,11 @@ retry:
 
   if (round)
     if ((frac64 & 0x8000) && ((frac64 & 0x7fffffffffff0000LL) !=  0x7fffffffffff0000LL))
+    {
       /* XXX: should this be a subtract for negative numbers? */
       frac64 += 0x10000;
+      TRACE(T_FP, "  ieeepr8: rounded frac %016llx\n", frac64);
+    }
 
   *p = swap64((frac64 & 0xffffffffffff0000LL) | (exp32 & 0xffff));
   return okay;
@@ -260,6 +288,7 @@ unsigned long long dfcm (unsigned long long dp, int *oflow) {
   CLEARC;
   *oflow = 0;
   getdp(dp, &frac64, &exp32);
+  TRACE(T_FP, "  dfcm: unpacked frac %016llx exp %08x\n", frac64, exp32);
   if (frac64 != 0) {                          /* can't normalize zero */
     if (frac64 == 0x8000000000000000LL) {     /* overflow case? */
       frac64 = 0x4000000000000000LL;          /* complement power of 2 */
@@ -290,6 +319,7 @@ unsigned long long norm(unsigned long long dp, int *oflow) {
 
   *oflow = 0;
   getdp(dp, &frac64, &exp32);
+  TRACE(T_FP, "  norm: unpacked frac %016llx exp %08x\n", frac64, exp32);
   while ((frac64 ^ (frac64 << 1)) >= 0) {
     frac64 = frac64 << 1;
     exp32--;
@@ -314,11 +344,16 @@ unsigned long long frn(unsigned long long dp, int *oflow) {
 
   *oflow = 0;
   getdp(dp, &frac64, &exp32);
+  TRACE(T_FP, "  frn: unpacked frac %016llx exp %08x\n", frac64, exp32);
   if (frac64 == 0)
+  {
+    TRACE(T_FP, "  frn: returning 0\n");
     return 0;
+  }
   else {
     doround1 = ((frac64 & 0x18000000000LL) != 0);
     doround2 = ((frac64 &  0x8000000000LL) != 0) && ((frac64 & 0x7FFFFF0000LL) != 0);
+    TRACE(T_FP, "  frn: doround1 %x doround2 %x\n", doround1, doround2);
     if (doround1 || doround2) {
       frac64 &= 0xFFFFFF0000000000LL;
       if (frac64 != 0x7FFFFF0000000000LL)
@@ -329,8 +364,10 @@ unsigned long long frn(unsigned long long dp, int *oflow) {
       }
       frac64 |= (exp32 & 0xFFFF);
       frac64 = norm(frac64, oflow);
+      TRACE(T_FP, "  frn: rounded frac %016llx\n", frac64);
       return frac64;
     }
+    TRACE(T_FP, "  frn: dp %016llx\n", dp);
     return dp;
   }
 }
@@ -356,26 +393,37 @@ int fcs (unsigned long long fac, int fop) {
   fop = fop & 0xffffff00;
   if (fop == 0)                                      /* fix dirty zero */
     fopexp = 0;
+  TRACE(T_FP, "  fcs: FAC: %016llx %04x; op: %016llx %04x\n", templ, facexp, fop, fopexp);
   if ((templ & 0x80000000) == (fop & 0x80000000)) {  /* compare signs */
     if (facexp == fopexp)                            /* compare exponents */
       if (templ == fop) {                            /* compare fractions */
+        TRACE(T_FP, "  fcs: frac cmp returning eq / skip 1\n");
         SETEQ;
         return 1;
       } else if (templ < fop) {                      /* compare fractions */
+        TRACE(T_FP, "  fcs: frac cmp returning lt / skip 2\n");
         SETLT;                                       /* FAC < operand */
         return 2;
-      } else
+      } else {
+        TRACE(T_FP, "  fcs: frac cmp returning gt / skip 0\n");
         return 0;                                    /* FAC > operand */
+      }
     else if (facexp < fopexp) {                      /* compare exponents */
+      TRACE(T_FP, "  fcs: exp cmp returning lt / skip 2\n");
       SETLT;                                         /* FAC < operand */
       return 2;
-    } else
+    } else {
+      TRACE(T_FP, "  fcs: exp cmp returning gt / skip 0\n");
       return 0;
+    }
   } else if (templ & 0x80000000) {
+    TRACE(T_FP, "  fcs: sign cmp returning lt / skip 2\n");
     SETLT;                                           /* FAC < operand */
     return 2;
-  } else
+  } else {
+    TRACE(T_FP, "  fcs: sign cmp returning gt / skip 0\n");
     return 0;                                        /* FAC > operand */
+  }
 }
 
 
@@ -386,7 +434,7 @@ int fcs (unsigned long long fac, int fop) {
 
    NOTE: This code doesn't pass Prime diagnostics for higher model
    CPU's, I'm guessing because comparison is implemented as subtract,
-   and we can't do that because numbers with huge exponents (and 
+   and we can't do that because numbers with huge exponents (and
    Prime ASCII characters in the DAC) won't convert to IEEE.
 */
 
@@ -404,27 +452,35 @@ int dfcs (unsigned long long fac, long long fop) {
   fop = fop & 0xffffffffffff0000LL;
   if (fop == 0)                                      /* fix dirty zero */
     fopexp = 0;
-#if 0
-  printf("dfcs: FAC: %016llx %04x; op: %016llx %04x\n", templl, facexp, fop, fopexp);
-#endif
+  TRACE(T_FP, "  dfcs: FAC: %016llx %04x; op: %016llx %04x\n", templl, facexp, fop, fopexp);
   if ((templl & 0x8000000000000000LL) == (fop & 0x8000000000000000LL)) {  /* compare signs */
     if (facexp == fopexp)                            /* compare exponents */
       if (templl == fop) {                           /* compare fractions */
+        TRACE(T_FP, "  dfcs: frac cmp returning eq / skip 1\n");
         SETEQ;
         return 1;
       } else if (templl < fop) {                     /* compare fractions */
+        TRACE(T_FP, "  dfcs: frac cmp returning lt / skip 2\n");
         SETLT;                                       /* FAC < operand */
         return 2;
-      } else
+      } else {
+        TRACE(T_FP, "  dfcs: frac cmp returning gt / skip 0\n");
         return 0;                                    /* FAC > operand */
+      }
     else if (facexp < fopexp) {                      /* compare exponents */
+      TRACE(T_FP, "  dfcs: exp cmp returning lt / skip 2\n");
       SETLT;                                         /* FAC < operand */
       return 2;
-    } else
+    } else {
+      TRACE(T_FP, "  dfcs: exp cmp returning eq / skip 1\n");
       return 0;
+    }
   } else if (templl & 0x8000000000000000LL) {
+    TRACE(T_FP, "  dfcs: sign cmp returning lt / skip 2\n");
     SETLT;                                           /* FAC < operand */
     return 2;
-  } else
+  } else {
+    TRACE(T_FP, "  dfcs: sign cmp returning gt / skip 0\n");
     return 0;                                        /* FAC > operand */
+  }
 }

util/utextp.c

@@ -1,5 +1,5 @@
 /* utextp.c, Jim Wilcoxson, March 16, 2005
-   Reads a Unix text file and converts it to a compressed Prime text file. 
+   Reads a Unix text file and converts it to a compressed Prime text file.
    This means:
    - turn high bit on
    - expand Unix tabs to spaces
@@ -29,7 +29,7 @@ main () {
     else {                    /* not a space character */
       while (space) {         /* dump held-back spaces first */
 	if (space < 3) {      /* write regular spaces */
-	  putchar(' ');
+	  putchar(0240);
 	  space--;
 	  n++;
 	} else {              /* write compressed spaces */