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Minor optimizations #2

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Minor optimizations #2

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34 changes: 12 additions & 22 deletions src/rtc.s
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Original file line number Diff line number Diff line change
Expand Up @@ -333,83 +333,73 @@ _start_async_code_in_stack:

; SEND PAYLOAD SIZE
move.l a0, d0 ; Address of the ROM3 in d0
or.w d1, d0 ; OR high and low words in d0
move.w d1, d0 ; OR high and low words in d0
move.l d0, a1 ; move to a1 ready to read from this address
move.b (a1), d0 ; Command payload size. d0 is a scratch register
tst.w d1
beq _no_more_payload_stack ; If the command does not have payload, we are done.

; SEND PAYLOAD
move.l a0, d0
or.w d2, d0
move.w d2, d0
move.l d0, a1
move.b (a1), d0 ; Command payload low d2
cmp.w #2, d1
beq _no_more_payload_stack

swap d2
move.l a0, d0
or.w d2, d0
move.w d2, d0
move.l d0, a1
move.b (a1), d0 ; Command payload high d2
cmp.w #4, d1
beq _no_more_payload_stack

move.l a0, d0
or.w d3, d0
move.w d3, d0
move.l d0, a1
move.b (a1), d0 ; Command payload low d3
cmp.w #6, d1
beq _no_more_payload_stack

swap d3
move.l a0, d0
or.w d3, d0
move.w d3, d0
move.l d0, a1
move.b (a1), d0 ; Command payload high d3
cmp.w #8, d1
beq _no_more_payload_stack

move.l a0, d0
or.w d4, d0
move.w d4, d0
move.l d0, a1
move.b (a1), d0 ; Command payload low d4
cmp.w #10, d1
beq _no_more_payload_stack

swap d4
move.l a0, d0
or.w d4, d0
move.w d4, d0
move.l d0, a1
move.b (a1), d0 ; Command payload high d4
cmp.w #12, d1
beq.s _no_more_payload_stack

move.l a0, d0
or.w d5, d0
move.w d5, d0
move.l d0, a1
move.b (a1), d0 ; Command payload low d5
cmp.w #14, d1
beq.s _no_more_payload_stack

swap d5
move.l a0, d0
or.w d5, d0
move.w d5, d0
move.l d0, a1
move.b (a1), d0 ; Command payload high d5
cmp.w #16, d1
beq.s _no_more_payload_stack

move.l a0, d0
or.w d6, d0
move.w d6, d0
move.l d0, a1
move.b (a1), d0 ; Command payload low d6
cmp.w #18, d1
beq.s _no_more_payload_stack

swap d6
move.l a0, d0
or.w d6, d0
move.w d6, d0
move.l d0, a1
move.b (a1), d0 ; Command payload high d6

Expand Down Expand Up @@ -479,4 +469,4 @@ ikbddate_test:
dc.b $1b,$23,$11,$09,$15,$55,$30,0

even
rom_function_end:
rom_function_end: