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converted pad input for cam to mips atom

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ed
2026-08-08 18:23:28 -04:00
parent 68b87f1c8b
commit b045856dd6
3 changed files with 87 additions and 26 deletions
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code/hello_camera/gen/offsets.h
+18
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@@ -26,6 +26,24 @@ enum {
atom_offset_end_low_exit_stick = _atom_offset_end_low_exit_stick, atom_offset_end_low_exit_stick = _atom_offset_end_low_exit_stick,
}; };
// --- atom: pad_input_cam (41 words) ---
#define _atom_offset_left_x_exit_left_x 3
#define _atom_offset_right_x_exit_right_x 3
#define _atom_offset_up_y_exit_up_y 3
#define _atom_offset_down_y_exit_down_y 3
#define _atom_offset_cross_z_exit_cross_z 3
#define _atom_offset_circle_z_exit_circle_z 3
enum {
atom_offset_left_x_exit_left_x = _atom_offset_left_x_exit_left_x,
atom_offset_right_x_exit_right_x = _atom_offset_right_x_exit_right_x,
atom_offset_up_y_exit_up_y = _atom_offset_up_y_exit_up_y,
atom_offset_down_y_exit_down_y = _atom_offset_down_y_exit_down_y,
atom_offset_cross_z_exit_cross_z = _atom_offset_cross_z_exit_cross_z,
atom_offset_circle_z_exit_circle_z = _atom_offset_circle_z_exit_circle_z,
};
// --- atom: cube_g4_face (76 words) --- // --- atom: cube_g4_face (76 words) ---
#define _atom_offset_cull_cube_g4_face_exit 41 #define _atom_offset_cull_cube_g4_face_exit 41
code/hello_camera/hello_camera.atom.c
+44 -2
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@@ -314,14 +314,56 @@ atom_label(exit_stick)
enum { enum {
R_Cam = R_T4 atom_reg, R_Cam = R_T4 atom_reg,
R_CamPadState = R_T5 atom_reg,
}; };
typedef Struct_(Binds_PadInputCam) { typedef Struct_(Binds_PadInputCam) {
PadState* state;
Camera* cam; Camera* cam;
}; };
internal MipsAtom_(pad_input_cam) atom_info(atom_bind(Binds_PadInputCam)) { internal MipsAtom_(pad_input_cam) atom_info(atom_bind(Binds_PadInputCam)
, atom_reads( R_Cam, R_CamPadState, R_TapePtr)
, atom_writes(R_Cam)
) {
/* Bind pop: state → R_CamPadState (R_T5), cam → R_Cam (R_T4), advance R_TapePtr by 8. */
load_word(R_CamPadState, R_TapePtr, O_(Binds_PadInputCam,state)),
load_word(R_Cam, R_TapePtr, O_(Binds_PadInputCam,cam)), load_word(R_Cam, R_TapePtr, O_(Binds_PadInputCam,cam)),
add_ui_self( R_TapePtr, S_(Binds_PadInputCam)), add_ui_self( R_TapePtr, S_(Binds_PadInputCam)),
// TODO(Ed): Implement.
/* Load pad[0].buttons into R_T0; nop fills the load-delay slot. */
load_word(R_T0, R_CamPadState, O_(PadState,buttons)),
load_word(R_T1, R_Cam, O_(Camera,pos.x)), // BD-Slot.
// D-pad Left → cam.pos.x -= 50. and_i fulfills BD-slot for load on R_Cam.
and_i(R_T3, R_T0, Pad_Left), branch_le_zero(R_T3, atom_offset(left_x, exit_left_x)), nop,
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.x)),
atom_label(exit_left_x)
/* D-pad Right → cam.pos.x += 50. Reuses R_T1 from Left. */
and_i(R_T3, R_T0, Pad_Right), branch_le_zero(R_T3, atom_offset(right_x, exit_right_x)), nop,
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.x)),
atom_label(exit_right_x)
/* D-pad Up → cam.pos.y -= 50. Load pos.y BEFORE the andi. */
load_word(R_T1, R_Cam, O_(Camera,pos.y)),
and_i(R_T3, R_T0, Pad_Up), branch_le_zero(R_T3, atom_offset(up_y, exit_up_y)), nop,
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.y)),
atom_label(exit_up_y)
/* D-pad Down → cam.pos.y += 50. Reuses R_T1 from Up. */
and_i(R_T3, R_T0, Pad_Down), branch_le_zero(R_T3, atom_offset(down_y, exit_down_y)), nop,
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.y)),
atom_label(exit_down_y)
/* D-pad Cross → cam.pos.z -= 50. Load pos.z BEFORE the andi. */
load_word(R_T1, R_Cam, O_(Camera,pos.z)),
and_i(R_T3, R_T0, Pad_Cross), branch_le_zero(R_T3, atom_offset(cross_z, exit_cross_z)), nop,
add_si(R_T1, R_T1, -50), store_word(R_T1, R_Cam, O_(Camera,pos.z)),
atom_label(exit_cross_z)
/* D-pad Circle → cam.pos.z += 50. Reuses R_T1 from Cross. */
and_i(R_T3, R_T0, Pad_Circle), branch_le_zero(R_T3, atom_offset(circle_z, exit_circle_z)), nop,
add_si(R_T1, R_T1, 50), store_word(R_T1, R_Cam, O_(Camera,pos.z)),
atom_label(exit_circle_z)
mac_yield(), mac_yield(),
}; };
code/hello_camera/hello_camera.c
+21 -20
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@@ -134,27 +134,28 @@ void update(PrimitiveArena* pa, U4* ordering_buf)
tb_data_(state, & smem.pad[1]); tb_data_(state, & smem.pad[1]);
// TODO(Ed): Implement based on below. // TODO(Ed): Implement based on below.
// tb_emit_(pad_input_cam); tb_emit_(pad_input_cam);
// tb_data_(cam, & smem.cam); tb_data_(state, & smem.pad[0]);
tb_data_(cam, & smem.cam);
if (pad0_btn_(Pad_Left)) { // if (pad0_btn_(Pad_Left)) {
smem.cam.pos.x -= 50; // smem.cam.pos.x -= 50;
} // }
if (pad0_btn_(Pad_Right)) { // if (pad0_btn_(Pad_Right)) {
smem.cam.pos.x += 50; // smem.cam.pos.x += 50;
} // }
if (pad0_btn_(Pad_Up)) { // if (pad0_btn_(Pad_Up)) {
smem.cam.pos.y -= 50; // smem.cam.pos.y -= 50;
} // }
if (pad0_btn_(Pad_Down)) { // if (pad0_btn_(Pad_Down)) {
smem.cam.pos.y += 50; // smem.cam.pos.y += 50;
} // }
if (pad0_btn_(Pad_Cross)) { // if (pad0_btn_(Pad_Cross)) {
smem.cam.pos.z -= 50; // smem.cam.pos.z -= 50;
} // }
if (pad0_btn_(Pad_Circle)) { // if (pad0_btn_(Pad_Circle)) {
smem.cam.pos.z += 50; // smem.cam.pos.z += 50;
} // }
// Demo input (not longer using) // Demo input (not longer using)