# The Lord of the Rings: War in the North - Legacy Edition 1.0.2
# BID: D70341137DAA544C
# INFO: RenderThreadWaitOnGPU blocks game to 59 FPS and causes CPU cores to rampage if not adjusted, but if adjusted to allow perfect 60 FPS image starts tearing, so i decided to not change it

DECLARATIONS:
  -
    type: variable
    name: frametime
    value_type: uint32
    default_value: 33333
    evaluate: 1000000 / FPS_LOCK_TARGET
  -
    type: variable
    name: refresh_rate
    value_type: float
    default_value: 0.01665
    evaluate: 0.999 * (1 / REFRESH_RATE)
  -
    type: code
    name: sleep
    instructions: [
      [adrp, x26, $frametime],
      [ldr, w26, [x26, $frametime]],
      [sub, w24, w26, 1],
      [cmp, x0, x24],
      [b, 0x1B7190]
    ]
  -
    type: code
    name: sleep2
    instructions: [
      [adrp, x26, $frametime],
      [ldr, w26, [x26, $frametime]],
      [sub, w24, w26, 1],
      [cmp, x0, x24],
      [b, 0x1B7238]
    ]
  -
    type: code
    name: gpuSleep
    instructions: [
      [mov, x0, -2],
      [svc, 0xB],
      [mov, x0, 10000],
      [svc, 0xB],
      [ret]
    ]
MASTER_WRITE:
  # RenderThreadWaitOnMainThread, main FPS lock
  # REF: 98 46 90 52 BA 46 90 52, search for CMP X0, X24
  -
    type: asm_a64
    main_offset: 0x1B718C
    instructions: [
      [b, _sleep()]
    ]
  -
    type: asm_a64
    main_offset: 0x1B7234
    instructions: [
      [b, _sleep2()]
    ]
  # RenderThreadWaitOnGPU
  # REF: A8 B2 8C 52 08 91 A7 72
  -
    type: asm_a64
    main_offset: 0x25CDD8
    instructions: [
      [adrp, x8, $refresh_rate],
      [ldr, w8, [x8, $refresh_rate]]
    ]
  # Stabilize CPU usage
  # patch YieldThread below
  -
    type: asm_a64
    main_offset: 0x25CDF0
    instructions: [
      [bl, _gpuSleep()]
    ]
ALL_FPS:
  -
    type: block
    what: timing