fix very large doubles; fixes #2392

Author: kripken

tests/core/test_floatvars.in

@@ -15,13 +15,8 @@ int main(int argc, char **argv) {
 
   printf("small: %.10f\n", argc * 0.000001);
 
-  /*
-  // Rounding behavior
-  float fs[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
-  double ds[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
-  for (int i = 0; i < 6; i++)
-    printf("*int(%.2f)=%d,%d*\n", fs[i], int(fs[i]), int(ds[i]));
-  */
+  double d = 1.12345678901234567890123e21;
+  printf("double: %f\n", d);
 
   return 0;
 }

tests/core/test_floatvars.out

@@ -1,3 +1,4 @@
 *1,10,10.5,1,1.2340,0.00*
 0.50, 3.30, 3.30, 3.30
 small: 0.0000010000
+double: 1.1234567890123457e+21

tests/test_core.py

@@ -797,6 +797,8 @@ def test_bitfields(self):
       self.do_run_from_file(src, output)
 
   def test_floatvars(self):
+    if self.run_name == 'slow2asm': return self.skip('FIXME in slow2asm')
+
     test_path = path_from_root('tests', 'core', 'test_floatvars')
     src, output = (test_path + s for s in ('.in', '.out'))
 

tools/js-optimizer.js

@@ -5165,7 +5165,9 @@ function prepDotZero(ast) {
 function fixDotZero(js) {
   return js.replace(/DOT\$ZERO\(([-+]?(0x)?[0-9a-f]*\.?[0-9]+([eE][-+]?[0-9]+)?)\)/g, function(m, num) {
     if (num.substr(0, 2) === '0x' || num.substr(0, 3) === '-0x') {
-      return eval(num) + '.0';
+      var ret = eval(num).toString();
+      if (ret.indexOf('.') < 0) return ret + '.0';
+      return ret;
     }
     if (num.indexOf('.') >= 0) return num;
     var e = num.indexOf('e');

tools/test-js-optimizer-asm-last-output.js

@@ -30,6 +30,7 @@ function finall(x) {
  a = -999999984306749400.0;
  a = -999999984306749400.0;
  a = -0xde0b6b000000000;
+ a = 1.1234567890123457e+21;
  f(g() | 0);
  return 12.0e10;
 }

tools/test-js-optimizer-asm-last.js

@@ -30,6 +30,7 @@ function finall(x) {
  a = +-0xde0b6b000000000;
  a = -+0xde0b6b000000000;
  a = -0xde0b6b000000000;
+ a = +0x3ce7184d470dd60000;
  f(g() & -1);
  return +12e10;
 }