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Fix boundary check for OP_LOADI16; ref fa8668c

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It was making a negative integer if the highest-order bit of a 16-bit
integer was 1.

no patched:

```ruby
p 0x7fff  # => 32767
p 0x8000  # => -32768
p 0xffff  # => -1
p 0x10000 # => 65536
```
This commit is contained in:
dearblue
2020-05-09 21:10:15 +09:00
parent 8cdf6a87ed
commit e2aecacaeb
1 changed files with 1 additions and 1 deletions
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mrbgems/mruby-compiler/core/codegen.c
+1 -1
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@@ -2448,7 +2448,7 @@ codegen(codegen_scope *s, node *tree, int val)
}
else if (i < 8) genop_1(s, OP_LOADI_0 + (uint8_t)i, cursp());
else if (i <= 0xff) genop_2(s, OP_LOADI, cursp(), (uint16_t)i);
else if (i <= 0xffff) genop_2S(s, OP_LOADI16, cursp(), (uint16_t)i);
else if (i <= 0x7fff) genop_2S(s, OP_LOADI16, cursp(), (uint16_t)i);
else {
int off;