How to use the assembler.

[KapoorAkshit18]

Greetings,
In the below given code

#ruledef
{
load r1, {value: i8} => 0x11 @ value
load r2, {value: i8} => 0x12 @ value
load r3, {value: i8} => 0x13 @ value
add r1, r2 => 0x21
sub r3, {value: i8} => 0x33 @ value
jnz {address: u16} => 0x40 @ address
ret => 0x50
}
adding the r2 and r1 will result in 35 which is 23 in hexadecimal then how 0x21 result is coming.
Please check.
And suggest you to add the comments

Regds,
Thank You

[chrisgbk]

Those are the definitions for assembler mnemonics, not actual instructions, values being assigned to registers, or the contents of registers. 0x21 is not the result of adding 0x11 and 0x12, it is the value that corresponds to the instruction that represents "add r1 and r2 and store it somewhere" in the same way that 0x11 isn't stored in r1, 0x11 means "copy the 8 bits that follow this instruction into r1." The point of this assembler is it's not for a specific ISA, you as the user define your own ISA, and then use that ISA to assemble instructions.

Suggest reading the wiki where all of this is explained.