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slightly optimize loop

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This commit is contained in:
Irmen de Jong 2020-08-25 00:35:51 +02:00
parent 144199730f
commit 2e2b8c498e
1 changed files with 4 additions and 4 deletions
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8
examples/plasma.p8
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@ -57,22 +57,22 @@ main {
ubyte @zp x ubyte @zp x
ubyte @zp y ubyte @zp y
for y in 0 to 24 { for y in 24 downto 0 {
ybuf[y] = sin8u(c1a) + sin8u(c1b) ybuf[y] = sin8u(c1a) + sin8u(c1b)
c1a += 4 c1a += 4
c1b += 9 c1b += 9
} }
c1A += 3 c1A += 3
c1B -= 5 c1B -= 5
for x in 0 to 39 { for x in 39 downto 0 {
xbuf[x] = sin8u(c2a) + sin8u(c2b) xbuf[x] = sin8u(c2a) + sin8u(c2b)
c2a += 3 c2a += 3
c2b += 7 c2b += 7
} }
c2A += 2 c2A += 2
c2B -= 3 c2B -= 3
for y in 0 to 24 { for y in 24 downto 0 {
for x in 0 to 39 { for x in 39 downto 0 {
@(screen) = xbuf[x] + ybuf[y] @(screen) = xbuf[x] + ybuf[y]
screen++ screen++
} }