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Atari Mega Archive 1
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src6.zoo
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cabs.s
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1991-09-24
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62 lines
# pml compatible lib for the atari sfp004
#
# Michael Ritzert, Oktober 1990
# ritzert@dfg.dbp.de
#
# FUNCTION: CABS(COMPLEX X)
#
# base = 0xfffa50
# the fpu addresses are taken relativ to "base":
#
# waiting loop ...
#
# wait:
# ww: cmpiw #0x8900,a1@(resp)
# beq ww
# is coded directly by
# .long 0x0c688900, 0xfff067f8
# and
# www: tst.b a1@(resp)
# bmi.b www
# is coded by
# word 0x4a68,0xfff0,0x6bfa | test
comm = -6
resp = -16
zahl = 0
.globl _cabs
.text
.even
_cabs:
lea 0xfffa50,a0
movew #0x5400,a0@(comm) | load fp0
.long 0x0c688900, 0xfff067f8
movel a7@(4),a0@ | load arg_hi
movel a7@(8),a0@ | load arg_low
movew #0x5480,a0@(comm) | load fp1
.long 0x0c688900, 0xfff067f8
movel a7@(12),a0@ | load arg_hi
movel a7@(16),a0@ | load arg_low
movew #0x0023,a0@(comm)
.word 0x4a68,0xfff0,0x6bfa | test
movew #0x04a3,a0@(comm)
.word 0x4a68,0xfff0,0x6bfa | test
movew #0x0422,a0@(comm) | fp0 = fp0 + fp1
.word 0x4a68,0xfff0,0x6bfa | test
movew #0x0004,a0@(comm) | sqrt(fp0)
.word 0x4a68,0xfff0,0x6bfa | test
movew #0x7400,a0@(comm) | result to d0/d1
.long 0x0c688900, 0xfff067f8
movel a0@(zahl),d0
movel a0@(zahl),d1
rts