diff options
Diffstat (limited to 'runtime.S')
| -rw-r--r-- | runtime.S | 68 |
1 files changed, 11 insertions, 57 deletions
@@ -1,62 +1,16 @@ - .global bcd_add -bcd_add: - xchg %rax, %rdi - - mov %cl, %ch - mov %al, %ah - and $0xF, %ch - and $0xF, %ah - and $0xF0, %cl - and $0xF0, %al - add %ah, %ch - cmp $10, %ch - jb no_adjust - add $6, %ch -no_adjust: - add %ch, %al - add %al, %cl - mov $0, %ch - jc def_adjust - cmp $0xA0, %cl - jb no_adjust_h -def_adjust: - add $0x60, %cl - mov $1, %ch -no_adjust_h: - - mov %rdi, %rax - ret - - .global bcd_sub -bcd_sub: - xchg %rax, %rdi - - mov %cl, %ch - mov %al, %ah - and $0xF, %ch - and $0xF, %ah - and $0xF0, %cl - and $0xF0, %al - sub %ah, %ch - cmp $10, %ch - jb no_adjusts - sub $6, %ch -no_adjusts: - add %ch, %cl - sub %al, %cl - mov $0, %ch - jc def_adjusts - cmp $0xA0, %cl - jb no_adjust_hs -def_adjusts: - sub $0x60, %cl - mov $1, %ch -no_adjust_hs: - - mov %rdi, %rax - ret +invalid_msg: + .asciz "Invalid instruction at %X\n" + + .global m68k_invalid +m68k_invalid: + lea invalid_msg(%rip), %rdi + mov %ecx, %esi + xor %rax, %rax + call printf + mov $1, %rdi + call exit |