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use crate::instruction::*;
use crate::{
MASK_VALUE, OFFSET_IS_ADDRESS, OFFSET_IS_INDIRECT, OFFSET_IS_STATE, OFFSET_OPERAND_1,
OFFSET_OPERAND_2, OFFSET_OPERAND_3, OFFSET_OP_CODE,
};
use half::f16;
const UNUSED_WORD: u64 = 0;
pub fn serialize(instruction: &Instruction) -> u64 {
match instruction {
NOP() => 0,
HLT() => 1 << OFFSET_OP_CODE,
SYN() => 2 << OFFSET_OP_CODE,
IIMOV(lint, rint) => make_instruction(3, make_lint(lint), make_rint(rint), UNUSED_WORD),
IDMOV(lint, rdouble) => {
make_instruction(4, make_lint(lint), make_rdouble(rdouble), UNUSED_WORD)
}
DIMOV(ldouble, rint) => {
make_instruction(5, make_ldouble(ldouble), make_rint(rint), UNUSED_WORD)
}
DDMOV(ldouble, rdouble) => {
make_instruction(6, make_ldouble(ldouble), make_rdouble(rdouble), UNUSED_WORD)
}
IADD(lint1, lint2, rint) => {
make_instruction(7, make_lint(lint1), make_lint(lint2), make_rint(rint))
}
IDIV(lint1, lint2, rint) => {
make_instruction(8, make_lint(lint1), make_lint(lint2), make_rint(rint))
}
IMOD(lint1, lint2, rint) => {
make_instruction(9, make_lint(lint1), make_lint(lint2), make_rint(rint))
}
IMUL(lint1, lint2, rint) => {
make_instruction(10, make_lint(lint1), make_lint(lint2), make_rint(rint))
}
ISUB(lint1, lint2, rint) => {
make_instruction(11, make_lint(lint1), make_lint(lint2), make_rint(rint))
}
DADD(ldouble1, ldouble2, rdouble) => make_instruction(
12,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_rdouble(rdouble),
),
DDIV(ldouble1, ldouble2, rdouble) => make_instruction(
13,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_rdouble(rdouble),
),
DMOD(ldouble1, ldouble2, rdouble) => make_instruction(
14,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_rdouble(rdouble),
),
DMUL(ldouble1, ldouble2, rdouble) => make_instruction(
15,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_rdouble(rdouble),
),
DSUB(ldouble1, ldouble2, rdouble) => make_instruction(
16,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_rdouble(rdouble),
),
IJEQ(lint1, lint2, code_offset) => make_instruction(
17,
make_lint(lint1),
make_lint(lint2),
make_code_offset(code_offset.offset),
),
IJNE(lint1, lint2, code_offset) => make_instruction(
18,
make_lint(lint1),
make_lint(lint2),
make_code_offset(code_offset.offset),
),
IJGT(lint1, lint2, code_offset) => make_instruction(
19,
make_lint(lint1),
make_lint(lint2),
make_code_offset(code_offset.offset),
),
IJLT(lint1, lint2, code_offset) => make_instruction(
20,
make_lint(lint1),
make_lint(lint2),
make_code_offset(code_offset.offset),
),
DJEQ(ldouble1, ldouble2, code_offset) => make_instruction(
21,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_code_offset(code_offset.offset),
),
DJNE(ldouble1, ldouble2, code_offset) => make_instruction(
22,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_code_offset(code_offset.offset),
),
DJGT(ldouble1, ldouble2, code_offset) => make_instruction(
23,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_code_offset(code_offset.offset),
),
DJLT(ldouble1, ldouble2, code_offset) => make_instruction(
24,
make_ldouble(ldouble1),
make_ldouble(ldouble2),
make_code_offset(code_offset.offset),
),
}
}
pub fn make_instruction(op_code: u64, operand1: u64, operand2: u64, operand3: u64) -> u64 {
(op_code << OFFSET_OP_CODE)
| (operand1 << OFFSET_OPERAND_1)
| (operand2 << OFFSET_OPERAND_2)
| (operand3 << OFFSET_OPERAND_3)
}
fn make_operand(is_address: bool, is_indirect: bool, is_state: bool, value: u16) -> u64 {
(if is_address {
1 << OFFSET_IS_ADDRESS
} else {
0
}) | (if is_indirect {
1 << OFFSET_IS_INDIRECT
} else {
0
}) | (if is_state { 1 << OFFSET_IS_STATE } else { 0 })
| value as u64
}
fn make_ldouble(ldouble: &LeftDouble) -> u64 {
match ldouble {
LeftDouble::State(index, mode) => make_operand(true, *mode == Mode::Indirect, true, *index),
LeftDouble::Input(index, mode) => {
make_operand(true, *mode == Mode::Indirect, false, *index)
}
LeftDouble::Constant(value) => {
make_operand(false, false, false, f16::from_f64(*value).to_bits())
}
}
}
fn make_lint(lint: &LeftInteger) -> u64 {
match lint {
LeftInteger::State(index, mode) => {
make_operand(true, *mode == Mode::Indirect, true, *index)
}
LeftInteger::Input(index, mode) => {
make_operand(true, *mode == Mode::Indirect, false, *index)
}
LeftInteger::Constant(value) => make_operand(false, false, false, *value as u16),
}
}
fn make_rdouble(rdouble: &RightDouble) -> u64 {
match rdouble {
RightDouble::State(index, mode) => {
make_operand(true, *mode == Mode::Indirect, true, *index)
}
RightDouble::Output(index, mode) => {
make_operand(true, *mode == Mode::Indirect, false, *index)
}
}
}
fn make_rint(rint: &RightInteger) -> u64 {
match rint {
RightInteger::State(index, mode) => {
make_operand(true, *mode == Mode::Indirect, true, *index)
}
RightInteger::Output(index, mode) => {
make_operand(true, *mode == Mode::Indirect, false, *index)
}
}
}
fn make_code_offset(code_offset: i16) -> u64 {
(code_offset as u64) & MASK_VALUE
}
