bubble: bring in the second call to sine

was already doing it via .include but was weird I had done the
first but not the second
This commit is contained in:
Vince Weaver 2024-01-04 12:32:08 -05:00
parent de0c366e75
commit 46c79e587e
1 changed files with 45 additions and 1 deletions

View File

@ -249,7 +249,51 @@ rl_smc:
sta STEMP1L ; 3
lda RXH ; 3
.include "sin_unrolled.s"
;=======================
; / 6.28 is roughly the same as *0.16
; = .5 .25 .125 .0625 .03125
; 1/6.28 = 0.16 = 0 0 1 0 1 0 0 0 = 0x28
; i=(i*0x28)>>8;
; A has STEMP1H
; i2=i<<3;
asl STEMP1L ; 5
rol ; 2
asl STEMP1L ; 5
rol ; 2
asl STEMP1L ; 5
rol ; 2
; i1=i<<5;
ldx STEMP1L ; 3
stx STEMP2L ; 3
sta STEMP1H ; 3
asl STEMP2L ; 5
rol ; 2
asl STEMP2L ; 5
rol ; 2
; i=(i1+i2)>>8;
; We ignore the low byte as we don't need it
; possibly inaccurate as we don't clear carry?
adc STEMP1H ; 2
tax ; 2
; sl=fsinh[i];
; tradeoff size for speed by having lookup
; table for sign bits
; the sign lookup only saves like 2 cycles
;=====================
; U+=sin(RX)