Modified stdlib to use stack rotations to timeshare heap registers.

[vvhitespace] / stdlib / debug.pvvs

diff --git a/stdlib/debug.pvvs b/stdlib/debug.pvvs
index 5261984..4cc8a73 100644 (file)
--- a/stdlib/debug.pvvs
+++ b/stdlib/debug.pvvs
@@ -6,6 +6,13 @@
 @   dumpheap (111000)
 @ Description:
 @   Dumps the heap from 'startaddr' to 'endaddr'.
 @   dumpheap (111000)
 @ Description:
 @   Dumps the heap from 'startaddr' to 'endaddr'.

+@   This subroutine stomps on heap[1] after printing the first heap location.
+@     If you dump starting from heap[0], then heap[1] will print inaccurately.
+@     Starting the dump from any other location will work without error.
+@     TODO: Should I use heap[0] and DIE rather than RTS?
+@           At the moment, the ability to continue is too useful to me.
+@           If it's useful to me, it's probably useful to other people.
+@           For now, leave dumpheap as-is.

 @ Call Stack:
 @   endaddr
 @   startaddr  <-- TOS
 @ Call Stack:
 @   endaddr
 @   startaddr  <-- TOS


@@ -22,12 +29,12 @@ TTT                      | LOAD
 SNT                      | SWAP
 
 @ Print output line for this memory location
 SNT                      | SWAP
 
 @ Print output line for this memory location

-NSTTSSSSSTN              | JSR>1000001 (print absolute value of number)
+NSTTSSSSTTN              | JSR>1000011 (print absolute value of number)

 SSSTTTSTSN               | PUSH ASCII ':'
 SSSTSSTN                 | PUSH ASCII '\t'
 TNSS                     | PUTC
 TNSS                     | PUTC
 SSSTTTSTSN               | PUSH ASCII ':'
 SSSTSSTN                 | PUSH ASCII '\t'
 TNSS                     | PUTC
 TNSS                     | PUTC

-NSTTSTSN                 | JSR>1010 (print number from stack)
+NSTTSSTN                 | JSR>1001 (print number from stack)

 SSSTSTSN                 | PUSH ASCII '\n'
 TNSS                     | PUTC
 
 SSSTSTSN                 | PUSH ASCII '\n'
 TNSS                     | PUTC
 


@@ -51,4 +58,41 @@ NSSVSSTTTSSSSSSSSSSSN    | Mark: 00111000 00000000
 SNN                      | DROP
 NTN                      | RTS
 
 SNN                      | DROP
 NTN                      | RTS
 

+@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+@ Name:
+@   dumpstack (111001)
+@ Description:
+@   Dumps 'count' entries from the stack.
+@ Call Stack:
+@   count <-- TOS
+@ Return Stack:
+@   <empty>
+@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+#include <stdio.pvvs>
+NSSVTTTSSTN              | Mark: 111001 (dump stack)
+
+@ Print output line for the current TOS.
+SNS                      | DUP
+NSTTSSSSTTN              | JSR>1000011 (print absolute value of number)
+SSSTTTSTSN               | PUSH ASCII ':'
+SSSTSSTN                 | PUSH ASCII '\t'
+TNSS                     | PUTC
+TNSS                     | PUTC
+SNT                      | SWAP
+NSTTSSTN                 | JSR>1001 (print number from stack)
+SSSTSTSN                 | PUSH ASCII '\n'
+TNSS                     | PUTC
+
+@ Figure out if the loop is complete.
+SNS                      | DUP
+NTSSSTTTSSTSSSSSSSSN     | BRZ > 00111001 00000000
+SSSTN                    | PUSH 1
+TSST                     | SUBTRACT
+NSNTTTSSTN               | JMP>111001 (dump stack)
+
+@ Clean up and return
+NSSVSSTTTSSTSSSSSSSSN    | Mark: 00111001 00000000
+SNN                      | DROP
+NTN                      | RTS
+

 #endif
 #endif