diff options
Diffstat (limited to 'apps/ex14.subx')
| -rw-r--r-- | apps/ex14.subx | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/apps/ex14.subx b/apps/ex14.subx new file mode 100644 index 00000000..74dd3809 --- /dev/null +++ b/apps/ex14.subx @@ -0,0 +1,26 @@ +# Multiply 2 numbers. +# +# To run: +# $ ./bootstrap translate init.linux apps/ex14.subx -o apps/ex14 +# $ ./bootstrap run apps/ex14 +# Expected result: +# $ echo $? +# 6 + +== code +# instruction effective address register displacement immediate +# . op subop mod rm32 base index scale r32 +# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes + +Entry: + b8/copy-to-eax 1/imm32 + b9/copy-to-ecx 2/imm32 + bb/copy-to-ebx 3/imm32 + + 69/multiply 3/mod/direct 1/rm32/ecx . . . 3/r32/ebx 3/imm32 # ebx = ecx * 3 + +$exit: + # exit(ebx) + e8/call syscall_exit/disp32 + +# . . vim:nowrap:textwidth=0 |