mirror of
https://github.com/avinal/The-VM-to-HACK-Translator.git
synced 2026-01-09 06:38:33 +05:30
cleaned test files
This commit is contained in:
avinal
@@ -1,196 +0,0 @@
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||||
<title>NestedCall.tst — Nand2Tetris Calling Convention Test</title>
|
||||
<style type="text/css">
|
||||
.code {font-family:"Courier New", Courier, monospace; font-size:90%;}
|
||||
pre {margin-left:2em;}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
|
||||
<h3>Synopsis</h3>
|
||||
<b>NestedCall.tst</b> is an intermediate test (in terms of complexity) intended to be used between the SimpleFunction and
|
||||
FibonacciElement tests. It may be useful when SimpleFunction passes but FibonacciElement fails or crashes. NestedCall also
|
||||
tests several requirements of the Function Calling Protocol that are not verified by the other
|
||||
supplied tests. NestedCall can be used with or without the VM bootstrap code.
|
||||
<p>
|
||||
<b>NestedCallVME.tst</b> runs the same test on the VM Emulator.
|
||||
<p>
|
||||
<b>The NestedCall</b> tests and supporting documentation were written by Mark Armbrust.
|
||||
|
||||
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
|
||||
<h3>Test Structure</h3>
|
||||
<h4>Startup</h4>
|
||||
NestedCall is implemented entirely within the Sys.vm file. The first function in Sys.vm is
|
||||
Sys.init(). This allows it to be used before the bootstrap code has been added to the VM Translator
|
||||
since there will be no file processing order issues.
|
||||
<p>
|
||||
NestedCall loads Sys.asm, sets up the stack to simulate the bootstrap's call to Sys.init(), then
|
||||
begins execution at the beginning of Sys.asm. If the bootstrap is not present, the program begins
|
||||
running with Sys.init() since it is the first function in Sys.vm.
|
||||
<p>
|
||||
If Sys.asm includes the bootstrap, the bootstrap will (re)initialize the stack and call Sys.init(),
|
||||
so the test should see the same environment either way it gets to Sys.init().
|
||||
<p>
|
||||
The test setup also initializes the
|
||||
|
||||
<h4>Sys.init()</h4>
|
||||
|
||||
<span class="code">THIS</span> and <span class="code">THAT</span> are set to known values so that context save and restore can be tested.
|
||||
<p>
|
||||
Sys.init() calls Sys.main() and stores the return value in <span class="code">temp 1</span>. This tests call to and
|
||||
return from a function with no arguments.
|
||||
|
||||
<h4>Sys.main()</h4>
|
||||
Sys.init() allocates 5 local variables. It sets <span class="code">local 1</span>, <span class="code">local 2</span> and
|
||||
<span class="code">local 3</span>. <span class="code">local 0</span> and <span class="code">local 4</span> are intentionally not set.
|
||||
<p>
|
||||
<span class="code">THIS</span> and <span class="code">THAT</span> are changed so that context save and restore can be tested.
|
||||
<p>
|
||||
Sys.main() calls Sys.add12(123) and stores the return value in <span class="code">temp 0</span>. This tests call to and
|
||||
return from a function with arguments.
|
||||
<p>
|
||||
After Sys.add12() returns, Sys.main() sums <span class="code">local 0</span> through <span class="code">local 4</span> and returns the
|
||||
result. This tests that the local segment was properly allocated on the stack and that the local
|
||||
variables were not overwritten by the call to Sys.main(). It also tests that <span class="code">local 0</span> and
|
||||
<span class="code">local 4</span> were properly initialized to 0.
|
||||
|
||||
<h4>Sys.add12()</h4>
|
||||
|
||||
<span class="code">THIS</span> and <span class="code">THAT</span> are set to known values so that context save and restore can be tested.
|
||||
<p>
|
||||
Returns <span class="code">argument 0</span> plus 12.
|
||||
|
||||
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
|
||||
<h3>Test Coverage</h3>
|
||||
|
||||
<p style="margin-left:1em; text-indent:-1em;">
|
||||
Functions with no arguments return to correct RIP (Return Instruction Point) with correct return value on stack.<br>
|
||||
This can fail if the RIP is not correctly pushed on the stack by the calling code, or if the returning
|
||||
code does not store the RIP in a temporary register before overwriting it with the return value.
|
||||
|
||||
<p style="margin-left:1em; text-indent:-1em;">
|
||||
Functions with arguments return to correct RIP with correct return value on stack.<br>
|
||||
This can fail if it is assumed that <span class="code">ARG</span> points to the RIP.
|
||||
|
||||
<p style="margin-left:1em; text-indent:-1em;">
|
||||
Functions with local variables allocate space on the stack for the local variables.<br>
|
||||
This can fail if the function prologue is not written or if the SP is not updated after zeroing
|
||||
the local variables.
|
||||
|
||||
<p style="margin-left:1em; text-indent:-1em;">
|
||||
All local variables are initialized to 0.<br>
|
||||
Common errors are to forget this completely, or for the zeroing loop to be off by one.
|
||||
|
||||
<p style="margin-left:1em; text-indent:-1em;">
|
||||
<span class="code">THIS</span> and <span class="code">THAT</span> are correctly retained across function calls. Looking ahead, in Project 9 you will be asked to write a simple computer game in the high-level Jack language. You can run your game (following compilation) on the supplied VM Emulator. But, if you choose to translate the VM code that the compiler generates using <em>your</em> VM Translator, then code like
|
||||
"<span class="code">push THIS</span>, <span class="code">push THAT</span> ... <span class="code">pop THIS</span>, <span class="code">pop THAT</span>" can cause some interesting failures!
|
||||
|
||||
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
|
||||
<h3>Debugging</h3>
|
||||
These comments assume that your VM translator has passed the SimpleFunction test.
|
||||
<p>
|
||||
If <span class="code">RAM[0]</span> is incorrect, you have a stack skew. More data was pushed onto the stack by
|
||||
<span class="code">call</span> than was popped by <span class="code">return</span>, or vice versa. See <i>debugging with
|
||||
breakpoints</i> later in this section.
|
||||
<p>
|
||||
If one or more of <span class="code">RAM[1]</span> through <span class="code">RAM[4]</span> is incorrect, the <span class="code">LCL</span>,
|
||||
<span class="code">ARG</span>, <span class="code">THIS</span> and <span class="code">THAT</span> pointers are not being correctly saved or restored.
|
||||
Most likely problem is when they are being saved; the SimpleFunction test verified that
|
||||
<span class="code">return</span> restored them correctly.
|
||||
<p>
|
||||
If <span class="code">RAM[5]</span> is incorrect there may be a problem with setting up the <span class="code">ARG</span> pointer.
|
||||
<p>
|
||||
If <span class="code">RAM[4]</span> is incorrect and <span class="code">RAM[5]</span> is correct, there may be a problem with
|
||||
allocation or initialization of local variables.
|
||||
|
||||
<h4>Debugging with breakpoints</h4>
|
||||
|
||||
To find tough bugs you can use the "breakpoint" facility in the CPU Emulator (red flag button).
|
||||
You can use breakpoints to have you program stop when it gets to a particular RAM address. For
|
||||
example:<br>
|
||||
 • load the NestedCall.tst file,<br>
|
||||
 • set a PC breakpoint at the ROM address for <span class="code">(Sys.main)</span>,<br>
|
||||
 • hit the run button.<br>
|
||||
When the CPU Emulator stops at the breakpoint you can inspect the RAM to check the stack and pointers values.
|
||||
(If the breakpoint isn't hit, you will need to to single-step debug through
|
||||
your calling code to see why it didn't get there.)
|
||||
<p>
|
||||
Other useful places to set breakpoints are the entry points to the other functions and at the
|
||||
first and final instructions generated for <span class="code">return</span> commands.
|
||||
<p>
|
||||
<a href="NestedCallStack.html">NestedCallStack.html</a> shows the expected stack values at various points
|
||||
during the test.
|
||||
|
||||
<h4>Finding ROM address in your ASM code</h4>
|
||||
It is not easy to find the ROM locations where you want to set breakpoints, because there is no
|
||||
one-to-one correspondence between the ASM file line numbers and the ROM addresses. This is made even more
|
||||
difficult because the supplied CPU Emulator does not display the (LABELS) in its ROM panel.
|
||||
<p>
|
||||
There are two things that you can do to make this easier.
|
||||
<p>
|
||||
<h5>Modify your assembler to generate a listing file.</h5>
|
||||
A listing file shows all the ASM source lines, including comments, as well as the ROM addresses and
|
||||
the values of the labels and the instructions. For example, here is a snippet of a listing file generated by an assembler written by Mark Armbrust:
|
||||
<pre>
|
||||
20 16 @i // i -= 1
|
||||
21 FC88 M=M-1
|
||||
|
||||
22 FC10 D=M // if i > 0
|
||||
23 6 @LOOP
|
||||
24 E301 D;JGT // goto LOOP
|
||||
|
||||
25 (STOP)
|
||||
25 25 @STOP
|
||||
26 EA87 0;JMP
|
||||
|
||||
Data Symbols
|
||||
|
||||
16 D i
|
||||
|
||||
Code Symbols
|
||||
|
||||
6 C LOOP
|
||||
17 C SKIP
|
||||
25 C STOP
|
||||
</pre>
|
||||
For the Nand2Tetris environment, it is most useful to list the ROM addresses and A-instruction
|
||||
values in decimal. In the above snippet, the C-instruction values are
|
||||
listed in hexadecimal.
|
||||
<p>
|
||||
The list file is generated during pass 2 of the Assembler, parallel to generating the .hack file. To
|
||||
make it easier to handle blank and comment only lines, Mark has Parser.commandType() return
|
||||
NO_COMMAND for source lines with no command. Mark also added Parser.sourceLine() that returns the
|
||||
unmodified source line.
|
||||
<p>
|
||||
<h5>Have your VM Translator write the VM source lines as comments in the ASM output.</h5>
|
||||
For example:
|
||||
<pre>
|
||||
// label LOOP
|
||||
(Sys.init$LOOP)
|
||||
// goto LOOP
|
||||
@Sys.init$LOOP
|
||||
0;JMP
|
||||
//
|
||||
// // Sys.main()
|
||||
//
|
||||
// // Sets locals 1, 2 and 3, leaving locals 0 and 4 unchanged to test
|
||||
// // default local initialization to 0. (RAM set to -1 by test setup.)
|
||||
// // Calls Sys.add12(123) and stores return value (135) in temp 0.
|
||||
// // Returns local 0 + local 1 + local 2 + local 3 + local 4 (456) to confirm
|
||||
// // that locals were not mangled by function call.
|
||||
//
|
||||
// function Sys.main 5
|
||||
(Sys.main)
|
||||
@5
|
||||
D=-A
|
||||
($3)
|
||||
@SP
|
||||
</pre>
|
||||
Note that comments in the VM source become double comments. Looking ahead, in Project 11 you will be asked to write a compiler for the Jack language. If your compiler will write the Jack source lines as comments in the
|
||||
generated VM files, this convention will be quite useful.
|
||||
|
||||
</body>
|
||||
</html>
|
||||
@@ -1,306 +0,0 @@
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||||
<title>NestedCall.tst — Stack Frames</title>
|
||||
<style type="text/css">
|
||||
.stack {border-collapse:collapse; font-size:80%;}
|
||||
.stack td {padding-left:.25em;padding-right:.25em;white-space:nowrap;}
|
||||
.stack td:first-child {text-align:right;}
|
||||
.stack td:first-child + td {text-align:right;}
|
||||
.stack td:first-child + td + td {text-align:left;}
|
||||
.stack td:first-child + td + td + td {text-align:left;}
|
||||
.stack .reg {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .reg th {border:1px solid;}
|
||||
.stack .stack {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .stack th {border:1px solid;}
|
||||
.stack .tos {border-left:1px solid; border-right:1px solid;border-bottom:1px solid;}
|
||||
.stack .frame {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .frame td:first-child + td {border-left:1px solid;}
|
||||
.stack .frame td:first-child + td + td {border-right:1px solid;}
|
||||
.stack .framet {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .framet td:first-child + td {border-left:1px solid;border-top:1px solid;}
|
||||
.stack .framet td:first-child + td + td {border-right:1px solid;border-top:1px solid;}
|
||||
.stack .bframe {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .bframe td:first-child + td {border-left:2px solid;}
|
||||
.stack .bframe td:first-child + td + td {border-right:2px solid;}
|
||||
.stack .bframet {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .bframet td:first-child + td {border-left:2px solid;border-top:2px solid;}
|
||||
.stack .bframet td:first-child + td + td {border-right:2px solid;border-top:2px solid;}
|
||||
.stack .bframeb {border-left:1px solid; border-right:1px solid;}
|
||||
.stack .bframeb td:first-child + td {border-left:2px solid;border-bottom:2px solid;}
|
||||
.stack .bframeb td:first-child + td + td {border-right:2px solid;border-bottom:2px solid;}
|
||||
.stack .note td {padding-left:.5em;padding-right:.5em;white-space:normal;text-align:justify;}
|
||||
.stack .fid {font-style:italic}
|
||||
.master {width: 10%;}
|
||||
.master td {vertical-align:top;padding-right:.5em; }
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
|
||||
<table class="master">
|
||||
<tr>
|
||||
<td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Bootstrap init</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>256</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>-1</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>-2</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>-3</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>-4</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="tos"><td>256</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
<tr class="note"><td colspan="4"><br>
|
||||
This is how my boot­strap code initial­izes the pointers before calling Sys.init().
|
||||
<p>
|
||||
Setting the LCL, ARG, THIS and THAT point­ers to known illegal values helps identify
|
||||
when a pointer is used before it is initial­ized.
|
||||
<p>
|
||||
(If you are running the NestedCall test with­out boot­strap code, you will not see this state.)</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Entry to Sys.init()</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>261</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>261</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>256</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>-3</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>-4</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="bframet"><td>256</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="bframe"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframeb"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="tos"><td>261</td><td>???</td><td></td><td>←LCL, SP</td></tr>
|
||||
<tr class="note"><td colspan="4"><br>
|
||||
This is how NestedCall.tst initial­izes the pointers and stack. This is what RAM looks
|
||||
like after my boot­strap calls Sys.init().
|
||||
<p>
|
||||
(If your VM trans­lation includes the boot­strap, the -1 through -4 values may be
|
||||
different if your boot­strap initial­izes them.)</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Entry to Sys.main()</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>266</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>266</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>261</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4000</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5000</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframet"><td>261</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="bframe"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframeb"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="tos"><td>266</td><td>???</td><td></td><td>←LCL, SP</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">After Sys.main() prologue</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>271</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>266</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>261</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4000</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5000</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframet"><td>261</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="bframe"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframe"><td>266</td><td>0</td><td>local 0</td><td>←LCL</td></tr>
|
||||
<tr class="bframe"><td>267</td><td>0</td><td>local 1</td><td></td></tr>
|
||||
<tr class="bframe"><td>268</td><td>0</td><td>local 2</td><td></td></tr>
|
||||
<tr class="bframe"><td>269</td><td>0</td><td>local 3</td><td></td></tr>
|
||||
<tr class="bframeb"><td>270</td><td>0</td><td>local 4</td><td></td></tr>
|
||||
<tr class="tos"><td>271</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
<tr class="note"><td colspan="4"><br>
|
||||
The <i>function prologue</i> is the assembly language code generated for the
|
||||
"function" VM command.
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Entry to Sys.add12(123)</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>277</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>277</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>271</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4001</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5001</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="framet"><td>261</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="frame"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="frame"><td>266</td><td>0</td><td>local 0</td><td></td></tr>
|
||||
<tr class="frame"><td>267</td><td>200</td><td>local 1</td><td></td></tr>
|
||||
<tr class="frame"><td>268</td><td>40</td><td>local 2</td><td></td></tr>
|
||||
<tr class="frame"><td>269</td><td>6</td><td>local 3</td><td></td></tr>
|
||||
<tr class="frame"><td>270</td><td>0</td><td>local 4</td><td></td></tr>
|
||||
<tr class="bframet"><td>271</td><td>123</td><td>argument 0</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>272</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="bframe"><td>273</td><td>266</td><td>Saved LCL</td><td class="fid">Sys.add12</td></tr>
|
||||
<tr class="bframe"><td>274</td><td>261</td><td>Saved ARG</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>275</td><td>4001</td><td>Saved THIS</td><td></td></tr>
|
||||
<tr class="bframeb"><td>276</td><td>5001</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="tos"><td>277</td><td>???</td><td></td><td>←LCL, SP</td></tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr></table>
|
||||
|
||||
<p>
|
||||
|
||||
<table class="master">
|
||||
<tr>
|
||||
<td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Before Sys.add12() return</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>278</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>277</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>271</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4002</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5002</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="framet"><td>261</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="frame"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="frame"><td>266</td><td>0</td><td>local 0</td><td></td></tr>
|
||||
<tr class="frame"><td>267</td><td>200</td><td>local 1</td><td></td></tr>
|
||||
<tr class="frame"><td>268</td><td>40</td><td>local 2</td><td></td></tr>
|
||||
<tr class="frame"><td>269</td><td>6</td><td>local 3</td><td></td></tr>
|
||||
<tr class="frame"><td>270</td><td>0</td><td>local 4</td><td></td></tr>
|
||||
<tr class="bframet"><td>271</td><td>123</td><td>argument 0</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>272</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="bframe"><td>273</td><td>266</td><td>Saved LCL</td><td class="fid">Sys.add12</td></tr>
|
||||
<tr class="bframe"><td>274</td><td>261</td><td>Saved ARG</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>275</td><td>4001</td><td>Saved THIS</td><td></td></tr>
|
||||
<tr class="bframe"><td>276</td><td>5001</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframeb"><td>277</td><td>135</td><td>Return value</td><td>←LCL</td></tr>
|
||||
<tr class="tos"><td>278</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">After Sys.add12() return</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>272</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>266</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>261</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4001</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5001</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframet"><td>261</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="bframe"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframe"><td>266</td><td>0</td><td>local 0</td><td>←LCL</td></tr>
|
||||
<tr class="bframe"><td>267</td><td>200</td><td>local 1</td><td></td></tr>
|
||||
<tr class="bframe"><td>268</td><td>40</td><td>local 2</td><td></td></tr>
|
||||
<tr class="bframe"><td>269</td><td>6</td><td>local 3</td><td></td></tr>
|
||||
<tr class="bframe"><td>270</td><td>0</td><td>local 4</td><td></td></tr>
|
||||
<tr class="bframeb"><td>271</td><td>135</td><td>Return value</td><td></td></tr>
|
||||
<tr class="tos"><td>272</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">Before Sys.main() return</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>272</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>266</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>261</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4001</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5001</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="framet"><td>256</td><td>*</td><td>Return IP</td><td></td></tr>
|
||||
<tr class="frame"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="frame"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="frame"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="frame"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframet"><td>261</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>262</td><td>261</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>263</td><td>256</td><td>Saved ARG</td><td class="fid">Sys.main</td></tr>
|
||||
<tr class="bframe"><td>264</td><td>4000</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>265</td><td>5000</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframe"><td>266</td><td>0</td><td>local 0</td><td>←LCL</td></tr>
|
||||
<tr class="bframe"><td>267</td><td>200</td><td>local 1</td><td></td></tr>
|
||||
<tr class="bframe"><td>268</td><td>40</td><td>local 2</td><td></td></tr>
|
||||
<tr class="bframe"><td>269</td><td>6</td><td>local 3</td><td></td></tr>
|
||||
<tr class="bframe"><td>270</td><td>0</td><td>local 4</td><td></td></tr>
|
||||
<tr class="bframeb"><td>271</td><td>246</td><td>Return value</td><td></td></tr>
|
||||
<tr class="tos"><td>272</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">After Sys.main() return</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>262</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>261</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>256</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4000</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5000</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="bframet"><td>256</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="bframe"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframe"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="bframeb"><td>261</td><td>246</td><td>Return value</td><td>←LCL</td></tr>
|
||||
<tr class="tos"><td>262</td><td>???</td><td></td><td>←SP</td></tr>
|
||||
</table>
|
||||
</td><td>
|
||||
<table class="stack">
|
||||
<tr><th colspan="4">In Sys.init() halt loop</th></tr>
|
||||
<tr class="reg"><th colspan="4">Pointers</th></tr>
|
||||
<tr class="reg"><td>0</td><td>261</td><td>SP</td><td></td></tr>
|
||||
<tr class="reg"><td>1</td><td>261</td><td>LCL</td><td></td></tr>
|
||||
<tr class="reg"><td>2</td><td>256</td><td>ARG</td><td></td></tr>
|
||||
<tr class="reg"><td>3</td><td>4000</td><td>THIS</td><td></td></tr>
|
||||
<tr class="reg"><td>4</td><td>5000</td><td>THAT</td><td></td></tr>
|
||||
<tr class="stack"><th colspan="4">Stack</th></tr>
|
||||
<tr class="bframet"><td>256</td><td>*</td><td>Return IP</td><td>←ARG</td></tr>
|
||||
<tr class="bframe"><td>257</td><td>-1</td><td>Saved LCL</td><td></td></tr>
|
||||
<tr class="bframe"><td>258</td><td>-2</td><td>Saved ARG</td><td class="fid">Sys.init</td></tr>
|
||||
<tr class="bframe"><td>259</td><td>-3</td><td>Saved THIS</td><td class="fid"> frame</td></tr>
|
||||
<tr class="bframeb"><td>260</td><td>-4</td><td>Saved THAT</td><td></td></tr>
|
||||
<tr class="tos"><td>261</td><td>???</td><td></td><td>←LCL, SP</td></tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr></table>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user