diff options
Diffstat (limited to 'x86_64-gen.c')
| -rw-r--r-- | x86_64-gen.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/x86_64-gen.c b/x86_64-gen.c index fa2460c..dd52e4a 100644 --- a/x86_64-gen.c +++ b/x86_64-gen.c @@ -893,6 +893,22 @@ void gfunc_call(int nb_args) } gcall_or_jmp(0); + /* other compilers don't clear the upper bits when returning char/short */ + bt = vtop->type.ref->type.t & (VT_BTYPE | VT_UNSIGNED); + if (bt == (VT_BYTE | VT_UNSIGNED)) + o(0xc0b60f); /* movzbl %al, %eax */ + else if (bt == VT_BYTE) + o(0xc0be0f); /* movsbl %al, %eax */ + else if (bt == VT_SHORT) + o(0x98); /* cwtl */ + else if (bt == (VT_SHORT | VT_UNSIGNED)) + o(0xc0b70f); /* movzbl %al, %eax */ +#if 0 /* handled in gen_cast() */ + else if (bt == VT_INT) + o(0x9848); /* cltq */ + else if (bt == (VT_INT | VT_UNSIGNED)) + o(0xc089); /* mov %eax,%eax */ +#endif vtop--; } |