diff options
Diffstat (limited to '05/util.b')
| -rw-r--r-- | 05/util.b | 29 |
1 files changed, 28 insertions, 1 deletions
@@ -1,4 +1,31 @@ - +; multiply two 64-bit signed numbers to a 128-bit number +function full_multiply_signed + argument a + argument b + argument p_lower + argument p_upper + local lower + local upper + + lower = a * b + ; mov rax, rdx + byte 0x48 + byte 0x89 + byte 0xd0 + ; mov [rbp-48] (upper), rax + byte 0x48 + byte 0x89 + byte 0x85 + byte 0xd0 + byte 0xff + byte 0xff + byte 0xff + + *8p_lower = lower + *8p_upper = upper + return + + function file_error argument name fputs(2, .str_file_error) |