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64 lines
1.8 KiB
Text
64 lines
1.8 KiB
Text
; This test checks how LOOP and BLOOP handle their arguments by running loops with the count
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; ranging from 0 to 0xffff. The current counter is shown via mail at the top of the screen.
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; This test gets slower as the counter gets larger (it runs in O(n^2)).
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incdir "tests"
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include "dsp_base.inc"
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test_main:
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CLR $acc0
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LRI $ar0, #0
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LRI $ix0, #0
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LRI $ar1, #0
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LRI $ix1, #0
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main_loop:
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CLR $acc1
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; Incrementing $acc1 $ac0.l times sets $acc1 to 1 * $ac0.l, which is just $ac0.l
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LOOP $ac0.l
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INC $acc1
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; We are now done looping. Check that the results match what we want...
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CMP
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JZ check_bloop
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; Did not match.
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IAR $ar0
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LRI $ix0, #1
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CALL send_back
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check_bloop:
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CLR $acc1
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; Same deal as above. Here we only have one instruction that is repeated via BLOOP.
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BLOOP $ac0.l, last_bloop_ins
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; TODO: This NOP is needed for things to behave properly; if the last_bloop_ins label
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; is immediately after the BLOOP instruction things break on real hardware.
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; There's no reason to do this normally though since the LOOP instruction does the same thing
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; without needing to provide a label. But it's worth checking eventually (along with how these
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; instructions behave when a 2-word long instruction is at the end).
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NOP
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last_bloop_ins:
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INC $acc1
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; We are now done looping. Check that the results match what we want...
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CMP
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JZ advance_main_loop
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; Did not match.
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IAR $ar1
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LRI $ix1, #1
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CALL send_back
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advance_main_loop:
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; Report progress as mail
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SI @DMBH, #0
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SR @DMBL, $ac0.l
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SI @DIRQ, #0x0001
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; Move on to the next value.
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; CMPIS (and CMPI) check the middle of the accumulator, so CMPIS $acc0, #1
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; checks if the full accumulator is 0x10000 - which is our end point.
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INC $acc0
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CMPIS $ac0.m, #1
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JNZ main_loop
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; Done with the test. $ar0, $ix0, $ar1, and $ix1 should all be 0.
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CALL send_back
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; We're done, DO NOT DELETE THIS LINE
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JMP end_of_test
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