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fixed bug in 16-bit multiplication

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FeralChild64 committed 2020-07-27 18:38:29 +02:00
1 parent ad521ab911
commit 68ea3eb314
1 file changed
+3 -3
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src/basic/engine_variables/helper_array_create_mul.s
+3 -3
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@@ -15,7 +15,7 @@ helper_array_create_mul: // preserves .X and .Y
// __FAC1+1 (lo byte) * __FAC1+3 (lo byte) // __FAC1+1 (lo byte) * __FAC1+3 (lo byte)
lda __FAC1+1 lda __FAC1+1
sta INDEX+2 sta INDEX+3
lda __FAC1+3 lda __FAC1+3
jsr mul_FAC2_FAC1_8x8 // this preserves .Y jsr mul_FAC2_FAC1_8x8 // this preserves .Y
@@ -25,14 +25,14 @@ helper_array_create_mul: // preserves .X and .Y
// __FAC1+1 (lo byte) * __FAC1+4 (hi byte) // __FAC1+1 (lo byte) * __FAC1+4 (hi byte)
lda __FAC1+1 lda __FAC1+1
sta INDEX+2 sta INDEX+3
lda __FAC1+4 lda __FAC1+4
jsr helper_array_create_mul_8x8_add // multiply and add to high byte of the result jsr helper_array_create_mul_8x8_add // multiply and add to high byte of the result
// __FAC1+2 (hi byte) * __FAC1+3 (lo byte) // __FAC1+2 (hi byte) * __FAC1+3 (lo byte)
lda __FAC1+2 lda __FAC1+2
sta INDEX+2 sta INDEX+3
lda __FAC1+3 lda __FAC1+3
jsr helper_array_create_mul_8x8_add // multiply and add to high byte of the result jsr helper_array_create_mul_8x8_add // multiply and add to high byte of the result