Added floating point, fixed LPB

This commit is contained in:
ceriel 1989-01-17 11:05:02 +00:00
parent 9c5f0e8159
commit ed34e06d2d
2 changed files with 263 additions and 1 deletions

View file

@ -381,6 +381,62 @@ C_sru
/* */
/******************************************************************************/
C_adf
$1 == 4 ==> "call .adf4";
"pop bx";
"pop bx".
$1 == 8 ==> "call .adf8";
"add sp,8".
default ==> arg_error("C_adf", $1).
C_sbf
$1 == 4 ==> "call .sbf4";
"pop bx";
"pop bx".
$1 == 8 ==> "call .sbf8";
"add sp,8".
default ==> arg_error("C_sbf", $1).
C_mlf
$1 == 4 ==> "call .mlf4";
"pop bx";
"pop bx".
$1 == 8 ==> "call .mlf8";
"add sp,8".
default ==> arg_error("C_mlf", $1).
C_dvf
$1 == 4 ==> "call .dvf4";
"pop bx";
"pop bx".
$1 == 8 ==> "call .dvf8";
"add sp,8".
default ==> arg_error("C_dvf", $1).
C_fif
$1 == 4 ==> "call .fif4".
$1 == 8 ==> "call .fif8".
default ==> arg_error("C_fif", $1).
C_fef
$1 == 4 ==> "pop ax";
"pop bx";
"push bx";
"push bx";
"push ax";
"call .fef4".
$1 == 8 ==> "pop ax";
"pop bx";
"pop cx";
"pop dx";
"push dx";
"push dx";
"push cx";
"push bx";
"push ax";
"call .fef8".
default ==> arg_error("C_fef", $1).
/******************************************************************************/
/* */
/* Group 6 : Pointer arithmetic */
@ -489,6 +545,8 @@ C_zer
default ==> arg_error( "C_zer", $1).
C_zrf ==> C_zer($1).
C_zer_narg ==> "pop cx";
"sar cx, 1";
"xor ax, ax";
@ -517,6 +575,54 @@ C_cuu ==> "pop cx";
"call .cuu";
"push ax".
C_cif ==> "call .cif".
C_cuf ==> "call .cuf".
C_cfi ==> "call .cfi";
"pop bx";
"pop cx";
"cmp bx,4";
"je 1f";
"add sp,cx";
"push ax";
"jmp 2f";
"1:add cx,4";
"add sp,cx";
"2:".
C_cfu ==> "call .cfu";
"pop bx";
"pop cx";
"cmp bx,4";
"je 1f";
"add sp,cx";
"push ax";
"jmp 2f";
"1:add cx,4";
"add sp,cx";
"2:".
C_cff ==> "pop ax";
"pop bx";
"cmp ax,bx";
"je 1f";
"cmp ax,4";
"je 2f";
"pop cx";
"pop bx";
"xor ax,ax";
"push ax";
"push ax";
"push bx";
"push cx";
"call .cff8";
"jmp 1f";
"2: call .cff4";
"pop bx";
"pop bx";
"1:".
/******************************************************************************/
/* */
/* Group 9 : Logical */
@ -767,6 +873,15 @@ C_cmp ==> "pop bx";
"1: dec ax";
"2: push ax".
C_cmf
$1 == 4 ==> "call .cmf4";
"add sp,8";
"push ax".
$1 == 8 ==> "call .cmf8";
"add sp,16";
"push ax".
default ==> arg_error("C_cmf", $1).
C_tlt ==> "pop ax";
"xor bx, bx";
"test ax, ax";
@ -1054,7 +1169,9 @@ C_lor
default ==> arg_error( "C_lor", $1).
C_lpb ==> "add bp, 4".
C_lpb ==> "pop ax";
"add ax,4";
"push ax".
C_mon ==> "pop ax";
"call .mon".
@ -1117,6 +1234,8 @@ C_trp ==> "pop ax";
$2 == 4 ==> gen4( (FOUR_BYTES) atol( $1)).
default ==> arg_error( "..ucon", $1).
..fcon ==> con_float($1, $2).
/******************************************************************************/
/* */
/* Extra-routines */

View file

@ -15,3 +15,146 @@ int val;
{
return( val >= -128 && val <= 127);
}
con_float(str, argval)
char *str;
int argval;
{
#ifdef NOFLOAT
static int been_here;
if (argval != 4 && argval != 8)
arg_error("fcon", argval);
if (argval == 8)
gen4((FOUR_BYTES) 0);
gen4((FOUR_BYTES) 0);
if ( !been_here++)
{
fprint(STDERR, "Warning : dummy float-constant(s)\n");
}
#else
#define IEEEFLOAT
double f;
double atof();
int i;
int j;
double frexp();
#ifndef OWNFLOAT
int sign = 0;
int fraction[4] ;
#else OWNFLOAT
float fl;
char *p;
#endif OWNFLOAT
if (argval!= 4 && argval!= 8) {
arg_error("fcon", argval);
argval = 8;
}
f = atof(str);
if (f == 0) {
if (argval == 8) gen4((FOUR_BYTES) 0);
gen4((FOUR_BYTES) 0);
return;
}
#ifdef OWNFLOAT
if (argval == 4) {
/* careful: avoid overflow */
double ldexp();
f = frexp(f, &i);
fl = f;
fl = frexp(fl,&j);
if (i+j > 127) {
/* overflow situation */
gen1(f<0?0377:0177);
gen1(0377);
gen1(0377);
gen1(0377);
return;
}
if (i+j < -127) {
/* underflow situation */
gen1(f<0?0200:0);
gen1(0200);
gen1(0);
gen1(0);
return;
}
fl = ldexp(fl, i+j);
p = (char *) &fl;
}
else {
p = (char *) &f;
}
gen1(*p++&0377);
for (i = argval-1; i; i--) {
gen1(*p++&0377);
}
#else OWNFLOAT
f = frexp(f, &i);
if (f < 0) {
f = -f;
sign = 1;
}
while (f < 0.5) {
f += f;
i --;
}
f = 2*f - 1.0; /* hidden bit */
#ifdef IEEEFLOAT
if (argval == 4) {
#endif IEEEFLOAT
i = (i + 128) & 0377;
fraction[0] = (sign << 15) | (i << 7);
for (j = 6; j>= 0; j--) {
f *= 2;
if (f >= 1.0) {
f -= 1.0;
fraction[0] |= (1 << j);
}
}
#ifdef IEEEFLOAT
}
else {
i = (i + 1024) & 03777;
fraction[0] = (sign << 15) | (i << 4);
for (j = 3; j>= 0; j--) {
f *= 2;
if (f >= 1.0) {
fraction[0] |= (1 << j);
f -= 1.0;
}
}
}
#endif IEEEFLOAT
for (i = 1; i < argval / 2; i++) {
fraction[i] = 0;
for (j = 15; j>= 0; j--) {
f *= 2;
if (f >= 1.0) {
fraction[i] |= (1 << j);
f -= 1.0;
}
}
}
if (f >= 0.5) {
for (i = argval/2 - 1; i >= 0; i--) {
for (j = 0; j < 16; j++) {
if (fraction[i] & (1 << j)) {
fraction[i] &= ~(1 << j);
}
else {
fraction[i] |= (1 << j);
break;
}
}
if (j != 16) break;
}
}
for (i = 0; i < argval/2; i++) {
gen1((fraction[i]>>8)&0377);
gen1(fraction[i]&0377);
}
#endif OWNFLOAT
#endif
}