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added testInterpreter(), which computes factorial using iCode (woo hoo!)

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git-svn-id: svn://10.0.0.236/trunk@65413 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
beard%netscape.com
2000-04-06 02:59:16 +00:00
parent 826b63caba
commit e431bb0ff8
2 changed files with 108 additions and 6 deletions
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57
mozilla/js2/tests/cpp/js2_shell.cpp
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@@ -23,8 +23,10 @@
//
#include <algorithm>
//#include <stdlib.h>
#include "world.h"
#include "interpreter.h"
namespace JS = JavaScript;
using namespace JavaScript;
@@ -407,13 +409,61 @@ static void testICG(World &world)
icg.saveVariable(0, icg.loadImmediate(99));
icg.endForStatement();
InstructionStream *iCode = icg.complete();
std::cout << icg;
}
static void testInterpreter(float64 n)
{
//
// testing ICG
//
uint32 position = 0;
ICodeGenerator icg;
// generate code for factorial, and interpret it.
// fact(n) {
// n is bound to var #0.
// var result = 1;
// result is bound to var #1.
icg.beginStatement(position);
icg.saveVariable(1, icg.loadImmediate(1.0));
// while (n > 1) {
// result = result * n;
// n = n - 1;
// }
{
icg.beginWhileStatement(position);
Register r0 = icg.loadVariable(0);
Register r1 = icg.loadImmediate(1.0);
Register r2 = icg.op(COMPARE, r0, r1);
icg.endWhileExpression(r2, BRANCH_GT);
r0 = icg.loadVariable(0);
r1 = icg.loadVariable(1);
r2 = icg.op(MULTIPLY, r1, r0);
icg.saveVariable(1, r2);
icg.beginStatement(position);
r0 = icg.loadVariable(0);
r1 = icg.loadImmediate(1.0);
r2 = icg.op(SUBTRACT, r0, r1);
icg.saveVariable(0, r2);
icg.endWhileStatement();
}
// return result;
icg.beginStatement(position);
InstructionStream *iCode = icg.complete(icg.loadVariable(1));
// std::cout << icg;
// test the iCode interpreter.
JSValues args(32);
args[0] = JSValue(n);
JSValue result = interpret(*iCode, args);
std::cout << "fact(" << n << ") = " << result.f64 << std::endl;
}
int main(int argc, char **argv)
{
#if defined(XP_MAC) && !defined(XP_MAC_MPW)
@@ -421,6 +471,7 @@ int main(int argc, char **argv)
#endif
World world;
#if 0
testInterpreter(5);
testICG(world);
#endif
readEvalPrint(std::cin, world);