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gno/lib/lsaneglue/saneglue.asm

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mcopy saneglue.mac
*
* Provide SANE glue code for functions declared in <sane.h>
*
* Supported functions at this time:
* s_num2dec
* s_dec2num
* s_str2dec
* s_dec2str
* s_fabs
* s_fneg
* s_remainder
* s_sqrt
* s_rint
* s_scalb
* s_logb
* s_copysign
* s_nextfloat
* s_nextdouble
* s_nextextended
* s_log2
* s_log
* s_log1
* s_exp2
* s_exp
* s_exp1
* s_power
* s_ipower
* s_compound
* s_annuity
* s_tan
* s_sin
* s_cos
* s_atan
* s_randomx
* s_classfloat
* s_classdouble
* s_classcomp
* s_classextended
* s_signnum
* s_setexception
* s_testexception
* s_sethalt
* s_testhalt
* s_setround
* s_getround
* s_setprecision
* s_getprecision
* s_setenvironment
* s_getenvironment
* s_procentry
* s_procexit
* s_gethaltvector
* s_sethaltvector
* s_relation
* s_nan
* s_inf
* s_pi
*
* Written in 1997 by Soenke Behrens.
* This code is hereby placed into the Public Domain.
*
*
* Dummy function to take care of saneglue.root, which
* can then be discarded.
*
dummy start
copy 13:ainclude:e16.sane ; Apple-supplied SANE EQUs
end
****************************************************************
*
* void s_num2dec (DecForm *f, extended x, Decimal *d);
*
* Convert SANE extended to SANE decimal record
*
* See also: Apple Numerics Manual, pg 26ff
*
****************************************************************
*
s_num2dec start
csub (4:decf_p,10:ext_x,4:dec_p)
ph4 decf_p
phptr ext_x
ph4 dec_p
fx2dec
sterr
ret
end
****************************************************************
*
* extended s_dec2num (Decimal *d);
*
* Convert SANE decimal record to SANE extended
*
* See also: Apple Numerics Manual, pg 26ff
*
****************************************************************
*
s_dec2num start
using sane_tmp
csub (4:dec_p)
ph4 dec_p
ph4 #ext_tmp
fdec2x
sterr
ret 10:ext_tmp
end
****************************************************************
*
* void s_str2dec (char *s, short *index, Decimal *d, short *validPrefix);
*
* Convert SANE decimal string (C-style) to SANE decimal record
*
* See also: Apple Numerics Manual, pg 30f
*
****************************************************************
*
s_str2dec start
csub (4:str_p,4:idx_p,4:dec_p,4:bool_p)
ph4 str_p
ph4 idx_p
ph4 dec_p
ph4 bool_p
fcstr2dec
sterr
ret
end
****************************************************************
*
* void s_dec2str (DecForm *f, Decimal *d, char *s);
*
* Convert SANE decimal record to SANE decimal string (C-style)
*
* See also: Apple Numerics Manual, pg 31ff
*
****************************************************************
*
s_dec2str start
str_l equ 1
space equ str_l+2
csub (4:decf_p,4:dec_p,4:str_p),space
ph4 decf_p
ph4 dec_p
ph4 str_p
fdec2str
sterr
* Now convert the P-string pointed to by str_p into a C-string
* Get length of string
stz str_l
short m
lda [str_p]
sta str_l
* If string is empty, don't try to copy
bne lab1
bra break
* Move string backwards one byte
lab1 ldy #0
loop iny
lda [str_p],y
dey
sta [str_p],y
iny
cpy str_l
bne loop
* Terminate string with 0
break lda #0
ldy str_l
sta [str_p],y
long m
ret
end
***************************************************************
*
* extended s_fabs (extended x);
*
* Return absolute value of x
*
* See also: Apple Numerics Manual, pg 49
*
****************************************************************
*
s_fabs start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fabsx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
***************************************************************
*
* extended s_fneg (extended x);
*
* Return negated value of x
*
* See also: Apple Numerics Manual, pg 49
*
****************************************************************
*
s_fneg start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fnegx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_remainder (extended x, extended y, short *quo);
*
* Compute remainder of x and y (x rem y)
*
* See also: Apple Numerics Manual, pg 46f
*
****************************************************************
*
s_remainder start
using sane_tmp
csub (10:ext_x,10:ext_y,4:quo_p)
phptr ext_y
phptr ext_x
fremx
sterr
txa ; store 7 low-order bits of magnitude of
sta [quo_p] ; integer quotient
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_sqrt (extended x);
*
* Compute square root of x
*
* See also: Apple Numerics Manual, pg 46
*
****************************************************************
*
s_sqrt start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fsqrtx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_rint (extended x);
*
* Round x to integral value
*
* See also: Apple Numerics Manual, pg 46f
*
****************************************************************
*
s_rint start
using sane_tmp
csub (10:ext_x)
phptr ext_x
frintx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_scalb (short n, extended x);
*
* Scale binary exponent, result = x * 2^n
*
* See also: Apple Numerics Manual, pg 50
*
****************************************************************
*
s_scalb start
using sane_tmp
csub (2:n,10:ext_x)
ph2 n
phptr ext_x
fscalbx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_logb (extended x);
*
* Compute binary exponent of normalized x
*
* See also: Apple Numerics Manual, pg 50
*
****************************************************************
*
s_logb start
using sane_tmp
csub (10:ext_x)
phptr ext_x
flogbx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_copysign (extended x, extended y);
*
* Return y with sign of x
*
* See also: Apple Numerics Manual, pg 49
*
****************************************************************
*
s_copysign start
using sane_tmp
csub (10:ext_x,10:ext_y)
phptr ext_x
phptr ext_y
fcpysgnx
sterr
copyx ext_y,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_nextfloat (extended x, extended y);
*
* Return next float number after (float) x in direction of
* (float) y
*
* See also: Apple Numerics Manual, pg 50
*
****************************************************************
*
s_nextfloat start
using sane_tmp
csub (10:ext_x,10:ext_y)
* Convert extended parameters to single
phptr ext_x
ph4 #sgl_x
fx2s
sterr
phptr ext_y
ph4 #sgl_y
fx2s
sterr
* Now invoke nextafter function
ph4 #sgl_y
ph4 #sgl_x
fnexts
sterr
* Convert result back to extended
ph4 #sgl_x
ph4 #ext_tmp
fs2x
sterr
ret 10:ext_tmp
end
****************************************************************
*
* extended s_nextdouble (extended x, extended y);
*
* Return next double number after (double) x in direction of
* (double) y
*
* See also: Apple Numerics Manual, pg 50
*
****************************************************************
*
s_nextdouble start
using sane_tmp
csub (10:ext_x,10:ext_y)
* Convert extended parameters to double
phptr ext_x
ph4 #dbl_x
fx2d
sterr
phptr ext_y
ph4 #dbl_y
fx2d
sterr
* Now invoke nextafter function
ph4 #dbl_y
ph4 #dbl_x
fnextd
sterr
* Convert result back to extended
ph4 #dbl_x
ph4 #ext_tmp
fd2x
sterr
ret 10:ext_tmp
end
****************************************************************
*
* extended s_nextextended (extended x, extended y);
*
* Return next extended number after x in direction of y
*
* See also: Apple Numerics Manual, pg 50
*
****************************************************************
*
s_nextextended start
using sane_tmp
csub (10:ext_x,10:ext_y)
phptr ext_y
phptr ext_x
fnextx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_log2 (extended x);
*
* Compute base-2 logarithm of x
*
* See also: Apple Numerics Manual, pg 62
*
****************************************************************
*
s_log2 start
using sane_tmp
csub (10:ext_x)
phptr ext_x
flog2x
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_log (extended x);
*
* Compute natural (base-e) logarithm of x
*
* See also: Apple Numerics Manual, pg 62
*
****************************************************************
*
s_log start
using sane_tmp
csub (10:ext_x)
phptr ext_x
flnx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_log1 (extended x);
*
* Compute natural (base-e) logarithm of (1+x)
*
* See also: Apple Numerics Manual, pg 62
*
****************************************************************
*
s_log1 start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fln1x
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_exp2 (extended x);
*
* Compute base-2 exponential of x
*
* See also: Apple Numerics Manual, pg 63f.
*
****************************************************************
*
s_exp2 start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fexp2x
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_exp (extended x);
*
* Compute natural (base-e) exponential of x
*
* See also: Apple Numerics Manual, pg 63f.
*
****************************************************************
*
s_exp start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fexpx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_exp1 (extended x);
*
* Compute the base-e exponential minus 1 (exp(x)-1)
*
* See also: Apple Numerics Manual, pg 63f.
*
****************************************************************
*
s_exp1 start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fexp1x
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_power (extended x, extended y);
*
* Compute the general exponential x^y
*
* See also: Apple Numerics Manual, pg 63f.
*
****************************************************************
*
s_power start
using sane_tmp
csub (10:ext_x,10:ext_y)
phptr ext_y
phptr ext_x
fxpwry
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_ipower (extended x, short i);
*
* Compute the integer exponential x^i
*
* See also: Apple Numerics Manual, pg 63f.
*
****************************************************************
*
s_ipower start
using sane_tmp
csub (10:ext_x,2:i)
ph2 i
phptr ext_x
fxpwri
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_compound (extended r, extended n);
*
* Compute compound (1+r)^n, where r is interest rate and n is
* periods (may be non-integral)
*
* See also: Apple Numerics Manual, pg 64f.
*
****************************************************************
*
s_compound start
using sane_tmp
csub (10:ext_r,10:ext_n)
phptr ext_r
phptr ext_n
ph4 #ext_tmp
fcompound
sterr
ret 10:ext_tmp
end
****************************************************************
*
* extended s_annuity (extended r, extended n);
*
* Compute annuity (1-(1+r)^n)/r, where r is interest rate and
* n is periods (may be non-integral)
*
* See also: Apple Numerics Manual, pg 65
*
****************************************************************
*
s_annuity start
using sane_tmp
csub (10:ext_r,10:ext_n)
phptr ext_r
phptr ext_n
ph4 #ext_tmp
fannuity
sterr
ret 10:ext_tmp
end
****************************************************************
*
* extended s_tan (extended x);
*
* Compute the tangent of x
*
* See also: Apple Numerics Manual, pg 66f.
*
****************************************************************
*
s_tan start
using sane_tmp
csub (10:ext_x)
phptr ext_x
ftanx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_sin (extended x);
*
* Compute the sine of x
*
* See also: Apple Numerics Manual, pg 66f.
*
****************************************************************
*
s_sin start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fsinx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_cos (extended x);
*
* Compute the cosine of x
*
* See also: Apple Numerics Manual, pg 66f.
*
****************************************************************
*
s_cos start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fcosx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_atan (extended x);
*
* Compute the arctangent of x
*
* See also: Apple Numerics Manual, pg 66f.
*
****************************************************************
*
s_atan start
using sane_tmp
csub (10:ext_x)
phptr ext_x
fatanx
sterr
copyx ext_x,ext_tmp
ret 10:ext_tmp
end
****************************************************************
*
* extended s_randomx (extended *x);
*
* Return next pseudo-random number and update integral x
*
* See also: Apple Numerics Manual, pg 67
*
****************************************************************
*
s_randomx start
using sane_tmp
csub (4:ext_p)
ph4 ext_p
frandx
sterr
ret 4:ext_p
end
****************************************************************
*
* numclass s_classfloat (extended x);
*
* Return classification of (float) x
*
* See also: Apple Numerics Manual, pg 44
*
****************************************************************
*
s_classfloat start
res equ 1
space equ res+2
using sane_tmp
csub (10:ext_x),space
* Convert parameter to float
phptr ext_x
ph4 #sgl_x
fx2s
sterr
* Call class function
ph4 #sgl_x
fclasss
sterr
* Store result
short i ; set high byte to 0
long i
txa
* Convert to C return values
cmp #FCSNAN ; Signaling NaN
bne lab1
lda #$0000
bra bye
lab1 cmp #FCQNAN ; Quiet NaN
bne lab2
lda #$0001
bra bye
lab2 cmp #FCINF ; Infinity
bne lab3
lda #$0002
bra bye
lab3 cmp #FCZERO ; Zero
bne lab4
lda #$0003
bra bye
lab4 cmp #FCNORM ; Normalized
bne lab5
lda #$0004
bra bye
lab5 cmp #FCDENORM ; Denormalized
bne err
lda #$0005
bra bye
err lda #$FFFF ; Unknown return code, return -1
bye sta res
ret 2:res
end
****************************************************************
*
* numclass s_classdouble (extended x);
*
* Return classification of (double) x
*
* See also: Apple Numerics Manual, pg 44
*
****************************************************************
*
s_classdouble start
res equ 1
space equ res+2
using sane_tmp
csub (10:ext_x),space
* Convert parameter to double
phptr ext_x
ph4 #dbl_x
fx2d
sterr
* Call class function
ph4 #dbl_x
fclassd
sterr
* Store result
short i ; set high byte to 0
long i
txa
* Convert to C return values
cmp #FCSNAN ; Signaling NaN
bne lab1
lda #$0000
bra bye
lab1 cmp #FCQNAN ; Quiet NaN
bne lab2
lda #$0001
bra bye
lab2 cmp #FCINF ; Infinity
bne lab3
lda #$0002
bra bye
lab3 cmp #FCZERO ; Zero
bne lab4
lda #$0003
bra bye
lab4 cmp #FCNORM ; Normalized
bne lab5
lda #$0004
bra bye
lab5 cmp #FCDENORM ; Denormalized
bne err
lda #$0005
bra bye
err lda #$FFFF ; Unknown return code, return -1
bye sta res
ret 2:res
end
****************************************************************
*
* numclass s_classcomp (extended x);
*
* Return classification of (comp) x
*
* See also: Apple Numerics Manual, pg 44
*
****************************************************************
*
s_classcomp start
res equ 1
space equ res+2
using sane_tmp
csub (10:ext_x),space
* Convert parameter to comp
phptr ext_x
ph4 #cmp_x
fx2c
sterr
* Call class function
ph4 #cmp_x
fclassc
sterr
* Store result
short i ; set high byte to 0
long i
txa
* Convert to C return values
cmp #FCSNAN ; Signaling NaN
bne lab1
lda #$0000
bra bye
lab1 cmp #FCQNAN ; Quiet NaN
bne lab2
lda #$0001
bra bye
lab2 cmp #FCINF ; Infinity
bne lab3
lda #$0002
bra bye
lab3 cmp #FCZERO ; Zero
bne lab4
lda #$0003
bra bye
lab4 cmp #FCNORM ; Normalized
bne lab5
lda #$0004
bra bye
lab5 cmp #FCDENORM ; Denormalized
bne err
lda #$0005
bra bye
err lda #$FFFF ; Unknown return code, return -1
bye sta res
ret 2:res
end
****************************************************************
*
* numclass s_classextended (extended x);
*
* Return classification of x
*
* See also: Apple Numerics Manual, pg 44
*
****************************************************************
*
s_classextended start
res equ 1
space equ res+2
csub (10:ext_x),space
phptr ext_x
fclassx
sterr
* Store result
short i ; set high byte to 0
long i
txa
* Convert to C return values
cmp #FCSNAN ; Signaling NaN
bne lab1
lda #$0000
bra bye
lab1 cmp #FCQNAN ; Quiet NaN
bne lab2
lda #$0001
bra bye
lab2 cmp #FCINF ; Infinity
bne lab3
lda #$0002
bra bye
lab3 cmp #FCZERO ; Zero
bne lab4
lda #$0003
bra bye
lab4 cmp #FCNORM ; Normalized
bne lab5
lda #$0004
bra bye
lab5 cmp #FCDENORM ; Denormalized
bne err
lda #$0005
bra bye
err lda #$FFFF ; Unknown return code, return -1
bye sta res
ret 2:res
end
****************************************************************
*
* long s_signnum (extended x);
*
* Return sign of x, 0 if positive and 1 if negative
*
* See also: Apple Numerics Manual, pg 44
*
****************************************************************
*
s_signnum start
res equ 1
space equ res+4
csub (10:ext_x),space
lda ext_x+8 get sign bit
bmi lab1
stz res
bra lab2
lab1 lda #1
sta res
lab2 stz res+2
ret 4:res
end
* This, the original implementation of s_signnum, had to be
* discarded because of a bug in SANE fclassx. Rather than fix
* fclassx, s_signnum was rewritten.
*
*s_signnum start
*res equ 1
*space equ res+4
*
* csub (10:ext_x),space
*
* phptr ext_x
* fclassx
* sterr
* Store result
* bpl plus
* lda #1
* sta res
* bra lab1
*plus stz res
*
*lab1 stz res+2
* ret 4:res
* end
****************************************************************
*
* void s_setexception (exception e, long b);
*
* Clears SANE exceptions according to flags in e if b is 0, sets
* these exceptions otherwise; may cause halt
*
* See also: Apple Numerics Manual, pg 54ff
*
****************************************************************
*
s_setexception start
csub (2:e,4:b)
* As e is passed, the exceptions are in 0-4.
lda e
* Just to be extra-cautious, clear all bits but 0-4
and #%0000000000011111
sta e
* Now check whether to set or clear flags
lda b
ora b+2 ; if b == 0
bne lab1 ; clear flags, don't set them
lda e
xba ; flags need to be in high word
eor #$FFFF ; reverse contents of e
sta e
fgetenv
sterr
txa
and e ; clear bits indicated by e
pha
fsetenv
sterr
bra lab2
lab1 lda e ; set flags
pha
fsetxcp
sterr
lab2 ret
end
****************************************************************
*
* long s_testexception (exception e);
*
* Return true if any SANE exception indicated by flags in e is
* set, return false otherwise
*
* See also: Apple Numerics Manual, pg 54ff
*
****************************************************************
*
s_testexception start
res equ 1
space equ res+4
csub (2:e),space
* As e is passed, the exceptions are in 0-4.
lda e
* Just to be extra-cautious, clear all bits but 0-4
and #%0000000000011111
sta e
ph2 e
ftestxcp
beq lab1 ; No exceptions set -> lab1
sterr
lda #1
sta res
bra lab2
lab1 sterr
stz res
lab2 stz res+2
ret 4:res
end
****************************************************************
*
* void s_sethalt (exception e, long b);
*
* Clears SANE exception halts according to flags in e if b is 0,
* sets these halts otherwise
*
* See also: Apple Numerics Manual, pg 54ff
*
****************************************************************
*
s_sethalt start
csub (2:e,4:b)
* Just to be extra-cautious, clear all bits in e that
* don't refer to halts: Everything but bits 0-4
lda e
and #%0000000000011111
sta e
* Now check whether to set or clear flags
lda b
ora b+2 ; if b == 0
bne lab1 ; clear flags, don't set them
lda e
eor #$FFFF ; reverse contents of e
sta e
fgetenv
sterr
txa
and e ; clear bits indicated by e
pha
fsetenv
sterr
bra lab2
lab1 fgetenv ; set bits indicated by e
sterr
txa
ora e
pha
fsetenv
sterr
lab2 ret
end
****************************************************************
*
* long s_testhalt (exception e);
*
* Return true if any SANE exception halt indicated by flags in e
* is set, return false otherwise
*
* See also: Apple Numerics Manual, pg 54ff
*
****************************************************************
*
s_testhalt start
res equ 1
space equ res+4
csub (2:e),space
* Just to be extra-cautious, clear all bits in e that
* don't refer to halts: Everything but bits 0-4
lda e
and #%0000000000011111
sta e
fgetenv
sterr
txa
and e
beq lab1 ; No halts set -> lab1
lda #1
sta res
bra lab2
lab1 stz res
lab2 stz res+2
ret 4:res
end
****************************************************************
*
* void s_setround (rounddir r);
*
* Set rounding direction to r
*
* See also: Apple Numerics Manual, pg 52f
*
****************************************************************
*
s_setround start
csub (2:r)
* Shift r into bits 14/15
lda r ; Bits 0/1
xba ; 8/9
asl a ; 9/10
asl a ; 10/11
asl a ; 11/12
asl a ; 12/13
asl a ; 13/14
asl a ; 14/15, done
sta r
fgetenv
sterr
txa
and #%0011111111111111 ; Clear bits 14/15
ora r ; Set them according to r
pha
fsetenv
sterr
ret
end
****************************************************************
*
* rounddir s_getround (void);
*
* Get rounding direction
*
* See also: Apple Numerics Manual, pg 52f
*
****************************************************************
*
s_getround start
res equ 1
space equ res+2
csub ,space
fgetenv
sterr
txa
and #%1100000000000000 ; Clear everything but bits 14/15
xba ; Put into 6/7
lsr a ; 5/6
lsr a ; 4/5
lsr a ; 3/4
lsr a ; 2/3
lsr a ; 1/2
lsr a ; 0/1, done
sta res
ret 2:res
end
****************************************************************
*
* void s_setprecision (roundpre p);
*
* Set rounding precision to p
*
* See also: Apple Numerics Manual, pg 53
*
****************************************************************
*
s_setprecision start
csub (2:p)
* Shift p into bits 6/7
lda p ; Bits 0/1
asl a ; 1/2
asl a ; 2/3
asl a ; 3/4
asl a ; 4/5
asl a ; 5/6
asl a ; 6/7, done
sta p
fgetenv
sterr
txa
and #%1111111100111111 ; Clear bits 6/7
ora p ; Set them according to p
pha
fsetenv
sterr
ret
end
****************************************************************
*
* roundpre s_getprecision (void);
*
* Get rounding precision
*
* See also: Apple Numerics Manual, pg 53
*
****************************************************************
*
s_getprecision start
res equ 1
space equ res+2
csub ,space
fgetenv
sterr
txa
and #%0000000011000000 ; Clear everything but bits 6/7
lsr a ; 5/6
lsr a ; 4/5
lsr a ; 3/4
lsr a ; 2/3
lsr a ; 1/2
lsr a ; 0/1, done
sta res
ret 2:res
end
****************************************************************
*
* void s_setenvironment (environment e);
*
* Set SANE environment word to e
*
* See also: Apple Numerics Manual, pg 57
*
****************************************************************
*
s_setenvironment start
csub (2:e)
ph2 e
fsetenv
sterr
ret
end
****************************************************************
*
* void s_getenvironment (environment *e);
*
* Get SANE environment word and store it in e
*
* See also: Apple Numerics Manual, pg 57
*
****************************************************************
*
s_getenvironment start
csub (4:eptr)
fgetenv
sterr
txa
sta [eptr]
ret
end
****************************************************************
*
* void s_procentry (environment *e);
*
* Get SANE environment word and store it in e, set SANE
* environment word to IEEE default (all zero)
*
* See also: Apple Numerics Manual, pg 57
*
****************************************************************
*
s_procentry start
csub (4:eptr)
ph4 eptr
fprocentry
sterr
ret
end
****************************************************************
*
* void s_procexit (environment e);
*
* Store current exceptions, set SANE environment word to e,
* signal stored exceptions.
*
* See also: Apple Numerics Manual, pg 57
*
****************************************************************
*
s_procexit start
csub (2:e)
ph2 e
fprocexit
sterr
ret
end
****************************************************************
*
* haltvector s_gethaltvector (void);
*
* Return SANE halt vector
*
* See also: Apple Numerics Manual, pg 54
*
****************************************************************
*
s_gethaltvector start
res equ 1
space equ res+4
csub ,space
fgethv
sterr
stx res ; low portion of pointer
tya ; Y contains bytes 2 and 3
xba ; put 3 into low position in A
and #$00FF ; and discard 2
sta res+2
ret 4:res
end
****************************************************************
*
* void s_sethaltvector (haltvector v);
*
* Set SANE halt vector to v
*
* See also: Apple Numerics Manual, pg 54
*
****************************************************************
*
s_sethaltvector start
csub (4:v)
ph4 v
fsethv
sterr
ret
end
****************************************************************
*
* relop s_relation (extended x, extended y);
*
* Compare x and y, return their relation so that "x Relation y"
* is true
*
* See also: Apple Numerics Manual, pg 49
*
****************************************************************
*
s_relation start
res equ 1
space equ res+2
csub (10:ext_x,10:ext_y),space
phptr ext_x
phptr ext_y
fcmpx
sterr
short i
txa
cmp #$0040 ; x > y
bne lab1
lda #$0000
bra bye
lab1 cmp #$0080 ; x < y
bne lab2
lda #$0001
bra bye
lab2 cmp #$0002 ; x == y
beq bye
cmp #$0001 ; x unordered y
bne err
lda #$0003
bra bye
err lda #$FFFF ; Unknown return code, return -1
bye sta res
long i
ret 2:res
end
****************************************************************
*
* extended s_nan (unsigned char c);
*
* Return a NaN with code c
*
****************************************************************
*
s_nan start
csub (2:c)
lda c
bne lab1
lda #$15
lab1 short m
sta nan_x+6
long m
ret 10:nan_x
nan_x dc h'0000000000000040FF7F' ; Hex encoding of a NaN
end
****************************************************************
*
* extended s_inf (void);
*
* Return +INF
*
****************************************************************
*
s_inf start
csub
ret 10:inf_x
inf_x dc h'0000000000000000FF7F' ; Hex encoding of +INF
end
****************************************************************
*
* extended s_pi (void);
*
* Return pi constant, which is stored as 3.1415926535897932385
*
****************************************************************
*
s_pi start
csub
ret 10:pi_x
pi_x dc h'35C26821A2DA0FC90040' ; Hex encoding of pi
end
****************************************************************
*
* Common data area for glue code
*
****************************************************************
*
sane_tmp privdata
ext_tmp dc e'0' ; Temporary result variable
sgl_x dc f'0' ; Float parameter 1
sgl_y dc f'0' ; Float parameter 2
dbl_x dc d'0' ; Double parameter 1
dbl_y dc d'0' ; Double parameter 2
cmp_x dc d'0' ; Comp parameter 1
end
* End Of File
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