31 lines
604 B
ArmAsm
31 lines
604 B
ArmAsm
;; #LAYOUT# STD * #TAKE
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;; #LAYOUT# * BASIC_0 #TAKE
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;; #LAYOUT# * * #IGNORE
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;
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; Math package - cosine of FAC1 in radians
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;
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; Adds pi/2 to FAC1 and falls through to the sine function
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;
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; See also:
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; - [CM64] Computes Mapping the Commodore 64 - page 210
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; - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
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; - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
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;
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!ifdef CONFIG_TRANSCENDENTAL_FUNCTIONS {
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COS:
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ldy #>const_HALF_PI
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lda #<const_HALF_PI
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jsr add_MEM_FAC1
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; FALLTHROUGH to SIN
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} else {
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jmp do_NOT_IMPLEMENTED_error
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}
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