kolibrios-fun/programs/develop/open watcom/trunk/clib/math/tanf.asm

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include mdef.inc
modstart tanf
xdefp _tanf
_tanf proc
fptan
fnstsw ax
test eax, 0x400
jnz L1
fstp st(0)
ret
L1: fldpi
fadd st,st
fxch st(1)
L2:
fprem1
fnstsw ax
test eax,0x400
jnz L2
fstp st(1)
fptan
fstp st(0)
ret
_tanf endp
endmod
end