mirror of https://github.com/rust-lang/rust
19 lines
494 B
C
19 lines
494 B
C
int cc_plus_one_c(int *arg) {
|
|
return *arg + 1;
|
|
}
|
|
|
|
int cc_plus_one_c_asm(int *arg) {
|
|
int value = 0;
|
|
|
|
asm volatile ( " movl (%1), %0\n"
|
|
" inc %0\n"
|
|
" jmp 1f\n"
|
|
" retq\n" // never executed, but a shortcut to determine how
|
|
// the assembler deals with `ret` instructions
|
|
"1:\n"
|
|
: "=r"(value)
|
|
: "r"(arg) );
|
|
|
|
return value;
|
|
}
|