save a cycle

2024-11-22 15:33:02 +00:00 · 2023-09-01 00:50:24 +02:00 · 2023-09-01 00:50:24 +02:00 · cfea8b3745
commit cfea8b3745
parent 28bf0b61ce
1 changed files with 3 additions and 3 deletions
--- a/compiler/res/prog8lib/math.p8
+++ b/compiler/res/prog8lib/math.p8
@ -100,8 +100,8 @@ _sinecosR8	.char  trunc(127.0 * sin(range(180+45) * rad(360.0/180.0)))

    asmsub log2(ubyte value @A) -> ubyte @Y {
        %asm {{
-            ldy  #$80
-            sty  P8ZP_SCRATCH_B1
+            sta  P8ZP_SCRATCH_B1
+            lda  #$80
            ldy  #7
 -           bit  P8ZP_SCRATCH_B1
            beq  +
@ -109,7 +109,7 @@ _sinecosR8	.char  trunc(127.0 * sin(range(180+45) * rad(360.0/180.0)))
 +           dey
            bne  +
            rts
-+           lsr  P8ZP_SCRATCH_B1
+           lsr  a
            bne  -
        }}
    }