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Reviewing. Successfuly reworked register allocation for tape runs.

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ed
2026-08-18 00:26:36 -04:00
parent 5a4bfb1224
commit da007d342e
19 changed files with 841 additions and 1787 deletions
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code/duffle/pad.atom.c
+9 -10
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@@ -13,9 +13,8 @@ ATOM_FILE_DEBUGGER_LINE_MARKER(pad_atom_c);
FI_ Slice_MipsCode ac_pad_set_centered_axes(AtomBuilder_R ab, Reg state, Reg scratch) atom_dbg_skip MipsAtomComp_Proc_(ab, {
load_upper_i(scratch, (PadAxis_Centered >> 16) & 0xFFFF),
or_i_self( scratch, PadAxis_Centered & 0xFFFF),
// mac_load_word_imm(scratch, PadAxis_Centered),
store_word( scratch, state, O_(PadState,axes)),
or_i_self( scratch, PadAxis_Centered & 0xFFFF), // mac_load_word_imm(scratch, PadAxis_Centered),
store_word( scratch, state, O_(PadState,axes)),
})
FI_ Slice_MipsCode ac_pad_set_id_byte(AtomBuilder_R ab, Reg state, Reg r_id, U1 id_value) atom_dbg_skip MipsAtomComp_Proc_(ab, {
@@ -32,8 +31,8 @@ FI_ Slice_MipsCode ac_pad_set_status(AtomBuilder_R ab, U4 r_tmp, U1 r_state, U4
* r_buttons must already be loaded (the caller is responsible for filling the load-delay slot of
* the preceding load_half_u with an instruction that doesn't read r_buttons). */
FI_ Slice_MipsCode ac_pad_store_inverted_buttons(AtomBuilder_R ab, U1 r_buttons, U1 r_pad_state) atom_dbg_skip MipsAtomComp_Proc_(ab, {
nor_u( r_buttons, r_buttons, R_0),
store_half( r_buttons, r_pad_state, O_(PadState,buttons)),
nor_u( r_buttons, r_buttons, R_0),
store_half(r_buttons, r_pad_state, O_(PadState,buttons)),
})
#pragma endregion MACs (Mips Atom Components)
@@ -91,8 +90,8 @@ atom_label(snap_root) /* === Case 1: Disconnected (status == 0xFF). */
* If branch NOT taken (fall through to pending/id_dispatch), R_T4 is overwritten by the next case body's add_ui — harmless. */
atom_label(disconnected) /* === Disconnected body. */
mac_pad_set_status(R_T4, R_PadState, PadStatus_Disconnected),
store_half( R_0, R_PadState, O_(PadState,buttons)),
mac_pad_set_status(R_T4, R_PadState, PadStatus_Disconnected),
store_half( R_0, R_PadState, O_(PadState,buttons)),
mac_pad_set_centered_axes(R_PadState, R_T4),
mac_pad_set_id_byte(R_PadState, R_RawId, PadRawStatus_Timeout),
jump_rel(atom_offset(disconnected, snap_end)),
@@ -108,8 +107,8 @@ atom_label(skip_disconnected)
* If branch NOT taken (fall through to id_dispatch), R_T4 is overwritten by the digital/analog body add_ui - harmless. */
atom_label(pending) /* === Pending body (status=0, id=0 — pre-IRQ-empty buffer). */
mac_pad_set_status(R_T4, R_PadState, PadStatus_Pending),
store_half( R_0, R_PadState, O_(PadState,buttons)),
mac_pad_set_status(R_T4, R_PadState, PadStatus_Pending),
store_half( R_0, R_PadState, O_(PadState,buttons)),
mac_pad_set_centered_axes(R_PadState, R_T4),
store_byte(R_RawId, R_PadState, O_(PadState,id)),
jump_rel(atom_offset(pending, snap_end)),
@@ -125,7 +124,7 @@ atom_label(id_dispatch) /* === Case 3-6: ID dispatch */
* R_T5 is then "dead" — only consumed at the analog_pad range check downstream. */
mac_pad_set_status(R_T4, R_PadState, PadStatus_Digital),
load_half_u( R_T4, R_PadRaw, O_(PadBiosRaw, buttons)), /* R_T4 = raw_buttons; */
mac_load_word_imm(R_T5, PadAxis_Centered), /* fills the buttons-load's delay slot (doesn't read R_T4) */
mac_load_word_imm( R_T5, PadAxis_Centered), /* fills the buttons-load's delay slot (doesn't read R_T4) */
// load_upper_i(R_T5, PadAxis_Centered_Hi), or_i_self(R_T5, PadAxis_Centered_Lo),
mac_pad_store_inverted_buttons(R_T4, R_PadState), /* R_T4 settled: nor + sh writes ~raw_buttons to state.buttons */
store_word(R_T5, R_PadState, O_(PadState, axes)), /* single sw writes the 4-byte axes block at offset 8 (left_x, left_y, right_x, right_y) */