hence/henceforth/templates/default.asm

{%- macro escape_name(name) -%}
{% if name.starts_with('"') %}{{ name }}{% else %}"{{ name }}"{% endif %}
{%- endmacro -%}

; Generated by Henceforth {{ env!("CARGO_PKG_VERSION") }} ({{ env!("CARGO_PKG_REPOSITORY") }})

.include "$lib/core.asm"
.include "$lib/std.asm"

.define_eval prev, OFFSET
  ts CORE_U16_MAX
  tlr CORE_REG_PC
.define_eval diff, (OFFSET - prev)
.define_eval MAIN_JUMPER, (CORE_MEM_PRG_END - diff)
.org prev
.delete prev, diff

; .define_eval prev, OFFSET
; {%- for c in conditions %}
;   .bytes CORE_U16_MAX{% if !c.data.1.is_empty() %}, CORE_U16_MAX{% endif %}
; {%- endfor %}
; .define_eval JUMP_TABLE_CONDITIONS_SIZE, (OFFSET - prev)
; .org prev
; .delete prev

; .define_eval JUMP_TABLE_WORDS_SIZE, ({{ words.len() }} * 2)

; .define_eval MEM_JUMP_TABLE_LEN, (JUMP_TABLE_CONDITIONS_SIZE + JUMP_TABLE_WORDS_SIZE / 2)
; .define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
; .define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)

; .debug MEM_JUMP_TABLE_LEN, MEM_JUMP_TABLE_PTR, MEM_JUMP_TABLE_END

; ; jump table
;   ; conditions
; {%- for c in conditions %}
;   jump_table_conditions_if_{{ c.id }}: .bytes 444
;   {%- if !c.data.1.is_empty() %}
;   jump_table_conditions_else_{{ c.id }}: .bytes 5498
;   {%- endif %}
; {%- endfor %}

.define_eval MEM_JUMP_TABLE_LEN, 9
.define_eval MEM_JUMP_TABLE_PTR, CORE_MEM_MEM
.define_eval MEM_JUMP_TABLE_END, (MEM_JUMP_TABLE_PTR + MEM_JUMP_TABLE_LEN)

.define_eval MEM_LOOP_DEPTH, (MEM_JUMP_TABLE_END + 1)
.define_eval MEM_LOOP_I, (MEM_LOOP_DEPTH + 1)
.define_eval MEM_LOOP_J, (MEM_LOOP_I + 1)

.define_eval MEM_CALL_STACK_LEN, 16
.define_eval MEM_CALL_STACK_PTR, (MEM_LOOP_J + 1)
.define_eval MEM_CALL_STACK_END, (MEM_CALL_STACK_PTR + MEM_CALL_STACK_LEN)

.define_eval MEM_ALLOC_PTR, (MEM_CALL_STACK_END + 1)

.macro stack_transfer_alu
  .std_ld
  tlr CORE_REG_B
  .std_ld
  tlr CORE_REG_A
.endmacro

; setup jump table


; reference MEM_CALL_STACK_PTR to itself
.std_rset CORE_REG_A, MEM_CALL_STACK_PTR
.std_set MEM_CALL_STACK_PTR

; reference MEM_ALLOC_PTR to itself
.std_rset CORE_REG_A, MEM_ALLOC_PTR
.std_set MEM_ALLOC_PTR

.std_jump MAIN_JUMPER

call_stack_jump:
  .std_get MEM_CALL_STACK_PTR
  tlr CORE_REG_A
  .std_rset CORE_REG_B, 1
  .std_alu CORE_ALU_ADD
  tlr CORE_REG_A
  tlr CORE_REG_B
  .std_set MEM_CALL_STACK_PTR

  tsr CORE_REG_D
  tlr CORE_REG_A
  tsr CORE_REG_B
  set
  tsr CORE_REG_C
  tlr CORE_REG_PC

return_call_stack_jump:
  .std_get MEM_CALL_STACK_PTR
  tlr CORE_REG_A
  tlr CORE_REG_C
  .std_rset CORE_REG_B, 1
  .std_alu CORE_ALU_SUB
  tlr CORE_REG_A
  .std_set MEM_CALL_STACK_PTR

  tsr CORE_REG_C
  get
  tlr CORE_REG_PC

.define_eval prev, OFFSET
  .std_rset CORE_REG_C, CORE_U16_MAX
  .std_rset CORE_REG_D, CORE_U16_MAX
  ts call_stack_jump
  tlr CORE_REG_PC
.define_eval CALL_STACK_JUMP_SIZE, (OFFSET - prev)
.org prev
.delete prev

.macro call_stack_jump, call_stack_jump_arg_0_label
  .define_eval prev, OFFSET
  .define offset_till_end, (OFFSET - prev * -1 + CALL_STACK_JUMP_COND_IF_ELSE_SIZE)

  .std_rset CORE_REG_C, call_stack_jump_arg_0_label
  .std_rset CORE_REG_D, (OFFSET + offset_till_end)
  ts call_stack_jump
  tlr CORE_REG_PC

  .delete prev, offset_till_end
.endmacro

.define_eval prev, OFFSET
  .std_ld
  tlr CORE_REG_A
  .std_rset CORE_REG_C, CORE_U16_MAX
  .std_rset CORE_REG_D, CORE_U16_MAX
  ts call_stack_jump
  tlrc CORE_REG_PC
.define_eval CALL_STACK_JUMP_COND_IF_SIZE, (OFFSET - prev)
.org prev
.delete prev

.macro call_stack_jump_cond_if, call_stack_jump_cond_if_arg_0_if_label
  .define_eval prev, OFFSET
  .define offset_till_end, (OFFSET - prev * -1 + CALL_STACK_JUMP_COND_IF_ELSE_SIZE)

  .std_ld
  tlr CORE_REG_A
  .std_rset CORE_REG_C, call_stack_jump_cond_if_arg_0_if_label
  .std_rset CORE_REG_D, (OFFSET + offset_till_end)
  ts call_stack_jump
  tlrc CORE_REG_PC

  .delete prev, offset_till_end
.endmacro

.define_eval prev, OFFSET
  .std_ld
  tlr CORE_REG_A
  .std_rset CORE_REG_C, CORE_U16_MAX
  .std_rset CORE_REG_D, CORE_U16_MAX
  ts call_stack_jump
  tlrc CORE_REG_PC

  .std_rset CORE_REG_C, CORE_U16_MAX
  .std_rset CORE_REG_D, CORE_U16_MAX
  ts call_stack_jump
  tlr CORE_REG_PC
.define_eval CALL_STACK_JUMP_COND_IF_ELSE_SIZE, (OFFSET - prev)
.org prev
.delete prev

.macro call_stack_jump_cond_if_else, call_stack_jump_cond_if_else_arg_0_if_label, call_stack_jump_cond_if_else_arg_1_else_label
  .define_eval prev, OFFSET
  .define offset_till_end, (OFFSET - prev * -1 + CALL_STACK_JUMP_COND_IF_ELSE_SIZE)

  .std_ld
  tlr CORE_REG_A
  .std_rset CORE_REG_C, call_stack_jump_cond_if_else_arg_0_if_label
  .std_rset CORE_REG_D, (OFFSET + offset_till_end)
  ts call_stack_jump
  tlrc CORE_REG_PC

  .std_rset CORE_REG_C, call_stack_jump_cond_if_else_arg_1_else_label
  .std_rset CORE_REG_D, (OFFSET + offset_till_end)
  ts call_stack_jump
  tlr CORE_REG_PC

  .delete prev, offset_till_end
.endmacro

.macro return_call_stack_jump
  .std_jump return_call_stack_jump
.endmacro

; data
  ; strings
  {%- for s in strings %}
    {% let bytes = s.data.as_bytes() -%}
    data_strings_{{ s.id }}:
      {% let name = snailquote::escape(s.data) -%}
      ; original  : {% call escape_name(name) %}
      ; size      : {{ bytes.len() }}
      {%- for byte in bytes %}
      .bytes {{ "0x{:02x}"|format(byte) }}
      {%- endfor %}
      data_strings_end_{{ s.id }}:
  {% endfor %}

; conditions
{%- for c in conditions %}
  ; condition: {{ c.id }}
    conditions_if_{{ c.id }}:
    {%- for ins in c.data.0 %}
      {{ ins }}
    {%- endfor %}
    .return_call_stack_jump

    conditions_else_{{ c.id }}:
    {%- for ins in c.data.1 %}
      {{ ins }}
    {%- endfor %}
    .return_call_stack_jump
{% endfor %}

; words
{%- for w in words %}
  words_{{ w.id }}:
    {% let name = snailquote::escape(w.data.0) -%}
    ; name : {% call escape_name(name) %}
    {%- for node in w.data.1 %}
    {{ node }}
    {%- endfor %}
  .return_call_stack_jump
{% endfor %}

; main
main:
.org MAIN_JUMPER
  ts main
  tlr CORE_REG_PC

.org main
{%- for node in main %}
  {{ node }}
{%- endfor %}
.std_stop