FeralChild64
c8d255130c
commit 145d64aa6e78838ed07cefed372f0ad6a4687e97 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 20:16:57 2020 +0200 ACME adaptation commit 885209d7822286744ea53232ae7461472a01d5d6 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 19:57:25 2020 +0200 ACME adaptation commit 334d84486bc603551887e7cbeb59d329f2224cc7 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 18:29:15 2020 +0200 ACME adaptation commit b5966f49bcd8f0ca79cbec93819a31238924707e Author: FeralChild64 <you@example.com> Date: Sun Sep 20 18:09:31 2020 +0200 ACME adaptation commit 786536a93a5eab5e676fca99625b4eb094a554e7 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 17:24:48 2020 +0200 ACME adaptation commit 704c70dfb1f5d68775d6f3da220803b8a3990f56 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 15:07:12 2020 +0200 ACME adaptation commit 136874964c9083b375f151475310f9636871fc72 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 14:45:14 2020 +0200 ACME adaptation commit 8eca0d5700b72d04336e72c5cd3a68e18b85f96d Author: FeralChild64 <you@example.com> Date: Sun Sep 20 14:06:52 2020 +0200 ACME adaptation commit 11d29eb7ee318239d782f85498b6d0524624d5c4 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 13:56:45 2020 +0200 ACME apaptation commit c9b5e5e04cceb92c66bc027e6440bc0f7c5a499f Author: FeralChild64 <you@example.com> Date: Sun Sep 20 13:49:04 2020 +0200 ACME adaptation commit f5cc254cbc921f07863807468cb3fe26b410b409 Author: FeralChild64 <you@example.com> Date: Sun Sep 20 13:01:18 2020 +0200 ACME adaptation commit e135a27bf9c30cc0965379c954564e06406303b1 Author: FeralChild64 <you@example.com> Date: Sat Sep 19 21:55:01 2020 +0200 ACME adaptation commit e9dfddf90d9e2795e88b7da40ae050d733faeb56 Author: FeralChild64 <you@example.com> Date: Sat Sep 19 21:48:47 2020 +0200 Makefile fix commit 07030104c65cf5e5beeacf6d629ccb9245e58657 Author: FeralChild64 <you@example.com> Date: Sat Sep 19 21:42:00 2020 +0200 ACME adaptation commit f824362ee5bcfbffca86c430b57773b2ffd65655 Author: FeralChild64 <you@example.com> Date: Sat Sep 19 20:14:56 2020 +0200 ACME adaptation commit 3a3c59007dcd4940d89b8669f34ca56b61c25fdf Author: FeralChild64 <you@example.com> Date: Fri Sep 18 21:51:45 2020 +0200 ACME adaptation commit 6790ef7bc88a41de2881c69b7524dd4ab8c74b5d Author: FeralChild64 <you@example.com> Date: Fri Sep 18 20:35:23 2020 +0200 ACME adaptation commit 38ad18b90e9ec713aa7ca49576b3388ce1733357 Author: FeralChild64 <you@example.com> Date: Fri Sep 18 18:46:20 2020 +0200 ACME adaptation commit 541340371122a9702f7b2d9771c298223cffd0e9 Author: FeralChild64 <you@example.com> Date: Fri Sep 18 16:49:46 2020 +0200 ACME adaptation commit 25cfd5e186459be1a260d3eb8cfff767838de370 Author: FeralChild64 <you@example.com> Date: Thu Sep 17 20:13:33 2020 +0200 ACME adaptation commit f61599444d5b1d03d8fd8e4a6a7c3b85069bedb3 Author: FeralChild64 <you@example.com> Date: Thu Sep 17 19:29:23 2020 +0200 ACME adaptation commit b290be31ec7bb2e5723607697da1bbc621c84429 Author: FeralChild64 <you@example.com> Date: Thu Sep 17 17:20:14 2020 +0200 ACME adaptation commit 877be9e856880d98fd4bcb25b42aaaacda9dc463 Author: FeralChild64 <you@example.com> Date: Wed Sep 16 21:47:38 2020 +0200 ACME adaptation commit bb20edaf85d386e41d5c2f715b745b68fbd3362e Author: FeralChild64 <you@example.com> Date: Wed Sep 16 21:31:30 2020 +0200 ACME adaptation commit c5d31bd8685abce37c8e254d15aac20bd1570d9f Author: FeralChild64 <you@example.com> Date: Wed Sep 16 18:40:49 2020 +0200 ACME adaptation commit 29349826b38f8a89649171559dc8cf24c560aff1 Author: FeralChild64 <you@example.com> Date: Mon Sep 14 23:35:47 2020 +0200 ACME adaptation commit 8bcd6a621c4b11766d0cf34f79858ba90a67248e Author: FeralChild64 <you@example.com> Date: Mon Sep 14 22:52:25 2020 +0200 ACME adaptation commit e87a69edc2ce4bfcc460c31e08dcc352a985f88d Author: FeralChild64 <you@example.com> Date: Mon Sep 14 22:43:27 2020 +0200 ACME adaptation commit f49a097bd52e96d00b866c02bda7121e4543233c Author: FeralChild64 <you@example.com> Date: Mon Sep 14 19:02:07 2020 +0200 ACME adaptation commit fa0e9214a633b8e8f867cc70925b390940dcd426 Author: FeralChild64 <you@example.com> Date: Mon Sep 14 17:47:19 2020 +0200 ACME adaptation commit 1b763b91e7a03e426227129c7f22f0ce57a4c197 Author: FeralChild64 <you@example.com> Date: Mon Sep 14 17:17:10 2020 +0200 ACME adaptation commit e92a4b57b232cd85eb1e71090b8a89c7c8461ebc Author: FeralChild64 <you@example.com> Date: Mon Sep 14 17:15:37 2020 +0200 ACME adaptation commit de3c693e8a7e73ea5289198946058e3240894e6a Author: FeralChild64 <you@example.com> Date: Mon Sep 14 17:10:05 2020 +0200 ACME adaptation commit f9bd7ae0f04e932d613be9ed5cb19af9be5d338e Author: FeralChild64 <you@example.com> Date: Sun Sep 13 14:34:44 2020 +0200 ACME adaptation commit 694dee52555dbfc2b1f7f452a9671ff51106c057 Author: FeralChild64 <you@example.com> Date: Sun Sep 13 14:16:14 2020 +0200 ACME adaptation commit 0af2c55edfcd22942d9f25417eb0d35f55b71604 Author: FeralChild64 <you@example.com> Date: Fri Sep 11 17:38:09 2020 +0200 ACME adaptation commit 2015e17334bd56a1e8a13a5abc098d9c2e7ea44f Author: FeralChild64 <you@example.com> Date: Fri Sep 11 16:46:05 2020 +0200 ACME adaptation commit b1e972162798d60f4483cd6cc261e856c20c2c8c Author: FeralChild64 <you@example.com> Date: Fri Sep 11 16:24:31 2020 +0200 ACME adaptation commit 9d027e868466901ba53bf074a79ec8cf16273021 Author: FeralChild64 <you@example.com> Date: Fri Sep 11 15:04:31 2020 +0200 ACME adaptation commit 957186deddd1aa4f3b4f1aa1f421e4239a584e57 Author: FeralChild64 <you@example.com> Date: Thu Sep 10 22:49:07 2020 +0200 ACME adaptation commit b8060f67a455cfac109f08d96b62c360d693b931 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 23:07:28 2020 +0200 ACME adaptation commit e54d004568f44bbfe5c070ef1d7cf3544112e497 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 22:58:20 2020 +0200 ACME adaptation commit f90b77f073c5a605cb31c6ee451f65c8a8aff7d8 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 22:12:09 2020 +0200 ACME adaptation commit b211bb4afcd9c58fe1f5c92f3007717d611cd531 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 22:01:40 2020 +0200 ACME adaptation commit 8d7ea343b07e9e08e5f77f3c414758a6cffd0440 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 21:38:34 2020 +0200 ACME adaptation commit 46413eb0d92d6400aba0ff8dfe556e61e8a44d78 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 21:07:47 2020 +0200 ACME adaptation commit 9f98f69ecc21f7b74a5eb89e247f5a2c6fcb655d Author: FeralChild64 <you@example.com> Date: Wed Sep 9 20:05:03 2020 +0200 ACME adaptation commit 7bb9f1cadc682c7e0a4a6796739d860d473ca110 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 19:55:12 2020 +0200 ACME adaptation commit 5fc115392b5bdca6b56f67ad866b1884d2d2bdf8 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 19:31:10 2020 +0200 ACME adaptation commit b7940fc60e568d859df9e3156f6bacc6d685b2cc Author: FeralChild64 <you@example.com> Date: Wed Sep 9 19:16:09 2020 +0200 ACME adaptation commit 56288cb97197561afa0816b29c134ec1190e8eab Author: FeralChild64 <you@example.com> Date: Wed Sep 9 18:48:23 2020 +0200 ACME adaptation commit 10401a60fc7922a53d782120ef6795d889140218 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 16:34:16 2020 +0200 ACME adaptation commit 8ce76e4d2b56837a691ae84b1a412a2ae32a157b Author: FeralChild64 <you@example.com> Date: Wed Sep 9 16:20:44 2020 +0200 ACME adaptation commit 33fade899fa6172ea6b5b5f6683bb61f544429fd Author: FeralChild64 <you@example.com> Date: Wed Sep 9 15:28:46 2020 +0200 ACME adaptation commit a416f04734402fcfbc57a933731376df2e0180a1 Author: FeralChild64 <you@example.com> Date: Wed Sep 9 12:40:03 2020 +0200 ACME adaptation commit f8daee005b1d29f6912723be2ac94bc5fbeb0508 Author: FeralChild64 <you@example.com> Date: Mon Sep 7 23:29:54 2020 +0200 ACME adaptation commit 83fe6bdd0b08a44fdbfc6eefe323a4b194ccaf5b Author: FeralChild64 <you@example.com> Date: Mon Sep 7 22:23:16 2020 +0200 ACME adaptation commit cb1f75620b9c83000a15c9c7f7acefdfee79a979 Author: FeralChild64 <you@example.com> Date: Mon Sep 7 19:23:12 2020 +0200 ACME adaptation commit e524d517c933ae1f0aeb49764d307fadb4845025 Author: FeralChild64 <you@example.com> Date: Sun Sep 6 08:24:25 2020 +0200 ACME adaptation - replaced comments commit 2ab572c3a21f4a78a7312d0e684bc11d91d1717a Author: FeralChild64 <you@example.com> Date: Sat Sep 5 17:59:10 2020 +0200 ACME adaptation - replaced the assembler
102 lines
1.9 KiB
ArmAsm
102 lines
1.9 KiB
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 - normalize FAC1
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;
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; See also:
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; - [CM64] Computes Mapping the Commodore 64 - page 113
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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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; XXX test this
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normal_FAC1:
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lda FAC1_exponent
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beq normal_FAC1_end ; branch if our float is 0
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; FALLTROUGH
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normal_FAC1_check_mantissa_byte:
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lda FAC1_mantissa+0
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beq normal_FAC1_by_byte ; branch if we can move the whole byte
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; FALLTROUGH
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normal_FAC1_check_mantissa_bit:
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lda FAC1_mantissa+0 ; XXX optimize for 65CE02?
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and #$80
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bne normal_FAC1_end ; branch if already normalized
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; FALLTROUGH
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normal_FAC1_by_bit:
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; Decrement the exponent
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dec FAC1_exponent
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beq normal_FAC1_end ; exponent reached 0, nothing more to do
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; Multiply the mantissa by 2
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asl FACOV
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rol FAC1_mantissa+3
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rol FAC1_mantissa+2
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rol FAC1_mantissa+1
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rol FAC1_mantissa+0
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bcc normal_FAC1_check_mantissa_bit ; branch if next iteration needed
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rts
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normal_FAC1_by_byte:
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; First decrement the exponent by 8, but not below 0
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lda FAC1_exponent
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sec
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sbc #$08
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bcs @1
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lda #$00
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@1:
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sta FAC1_exponent
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beq normal_FAC1_end ; branch if our float reached 0
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; Now multiply the mantissa by 8 by moving the whole bytes
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lda FAC1_mantissa+1
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sta FAC1_mantissa+0
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lda FAC1_mantissa+2
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sta FAC1_mantissa+1
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lda FAC1_mantissa+3
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sta FAC1_mantissa+2
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lda FACOV
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sta FAC1_mantissa+3
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lda #$00
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sta FACOV
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; Now check if mantissa is not 0
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ora FAC1_mantissa+0
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ora FAC1_mantissa+1
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ora FAC1_mantissa+2
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ora FAC1_mantissa+3
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bne normal_FAC1_check_mantissa_byte ; not 0 - branch to next iteration
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; Our mantissa reached 0 - mark exponent as 0 and finish
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sta FAC1_exponent
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; FALLTROUGH
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normal_FAC1_end:
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rts
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