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by jxy 829 days ago
It's much clearer if you read one of the source code of the libm.

Plan 9: https://9p.io/sources/plan9/sys/src/libc/port/sin.c

Freebsd: https://cgit.freebsd.org/src/tree/lib/msun/src/k_sin.c
3 comments
lifthrasiir 829 days ago
FreeBSD code is missing the range reduction step (it's named a "kernel" for the reason): https://cgit.freebsd.org/src/tree/lib/msun/src/e_rem_pio2.c
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planede 828 days ago
Ah, I always referred to the musl implmenetation, but I just now realized that they copied the Freebsd one.
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jxy 828 days ago
it says "Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved."

and the directory name is literally: `msun`

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anthk 828 days ago
Does 9front keep the same sin.c implementation?
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jxy 828 days ago
http://git.9front.org/plan9front/plan9front/HEAD/sys/src/lib...
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