gdone.s
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##########################################################################
#
# This code includes yield and taskdone code
#
# This code is in an overlay. See the file goverlays.s for comments on how
# overlays are loaded.
#
##########################################################################
#ifdef FASTLIGHT3D
#include <rsp.h>
#include "mbi.h"
.text startClip
#include "gdmem.h"
#include "gfx_regs.h"
#endif /* FASTLIGHT3D */
######################################################################
######################################################################
#
# JUMP TO YIELD (MUST BE EXACTLY 2 INSTRUCTIONS)
#
#ifdef FASTLIGHT3D
j RSPYieldOver
nop
#endif /* FASTLIGHT3D */
######################################################################
######################################################################
#
# TASKDONE
#
.name dramp, $19
.name dmemp, $20
.name dmasz, $18
.name iswrite, $17
#ifndef FASTLIGHT3D
TaskDone: # all done, return to executive:
#endif /* FASTLIGHT3D */
#
# If we sent output to the DRAM, update the counter
# in DRAM
#
#ifdef OUTPUT_DRAM
# lw dramp, RSP_STATE_DRAM_OUTP(rsp_state)
# beq dramp, zero, TaskHalt
addi dmemp, rsp_state, RSP_STATE_DRAM_OUT_LEN
lw dramp, RSP_STATE_DRAM_OUT_LENP(rsp_state)
addi iswrite, zero, 1
jal DMAproc
addi dmasz, zero, 7 # delay slot
#else
nop
#endif
.unname dramp
.unname dmemp
.unname dmasz
.unname iswrite
.name yield, $2
TaskHalt:
jal DMAwait
ori yield, zero, SP_SET_TASKDONE # delay slot
mtc0 yield, SP_STATUS # DONE, not a BP
break # tell cpu we are done
nop # and HALT
.unname yield
######################################################################
######################################################################
#
# YIELD
#
#ifdef FASTLIGHT3D
#define YIELD_STOP
#include "gyield.s"
#undef YIELD_STOP
nop
nop
#endif /* FASTLIGHT3D */
#ifndef _HW_VERSION_1
# just to show that we're using HW2 code...
# THIS WILL BE DELETED!
addiu $0, $0, 0xbeef
#endif