#endif
#ifdef FLOAT
+#define SDCC_FLOAT_LIB
#include <float.h>
static bit continue_float;
#ifndef FLOAT_FIXED4
mov _field_width, #0
#endif
print_float_begin:
- mov exp_b, r0 // keep r0 safe, will need it again
+ push ar0 // keep r0 safe, will need it again
lcall printf_get_float
clr c
mov a, #158 // check for large float we can't print
- subb a, exp_a
+ subb a, r7
jnc print_float_size_ok
printf_float_too_big:
// TODO: should print some sort of overflow error??
+ pop ar0
ljmp printf_format_loop
print_float_size_ok:
- lcall __fs_rshift_a
+ push dpl
+ lcall fs_rshift_a
+ pop dpl
setb _continue_float
#ifndef LONG
mov a, r3
lcall printf_putchar
// now that the integer part is printed, we need to refetch the
// float from the va_args and extract the fractional part
- mov r0, exp_b
+ pop ar0
lcall printf_get_float
push ar0
- mov a, exp_a
+ push dpl
+ push dph
+ mov a, r7
cjne a, #126, print_float_frac_lshift
sjmp print_float_frac // input between 0.5 to 0.9999
print_float_frac_lshift:
//Acc (exponent) is less than 126 (input < 0.5)
cpl a
add a, #127
- lcall __fs_rshift_a
+ lcall fs_rshift_a
print_float_frac:
// now we've got the fractional part, so now is the time to
// convert to BCD... just convert each bit to BCD using a
clr a
mov r6, a
mov r5, a
- push dpl
- push dph
mov dptr, #_frac2bcd // FLOAT_FIXED4 version (14 entries)
print_float_frac_loop:
mov a, r3
print_float_begin:
push ar0 // keep r0 safe, will need it again
lcall printf_get_float
- mov a, exp_a
+ push dpl
+ push dph
+ mov a, r7
cjne a, #126, print_float_frac_lshift
sjmp print_float_frac // input between 0.5 to 0.9999
//Acc (exponent) is less than 126 (input < 0.5)
cpl a
add a, #127
- lcall __fs_rshift_a
+ lcall fs_rshift_a
print_float_frac:
- // Convert the fraction in r4/r3/r2/r1 into 8 BCD digits in exb_b/r7/r6/r5
+ // Convert the fraction in r4/r3/r2/r1 into 8 BCD digits in r0/r7/r6/r5
mov b, #27
clr a
- mov exp_b, a
+ mov r0, a
mov r7, a
mov r6, a
mov r5, a
- push dpl
- push dph
mov dptr, #_frac2bcd // FLOAT version (27 entries)
print_float_frac_loop:
mov a, r1
mov r7, a
mov a, #3
movc a, @a+dptr
- addc a, exp_b
+ addc a, r0
da a
- mov exp_b, a
+ mov r0, a
print_float_frac_skip:
inc dptr
inc dptr
inc dptr
inc dptr
djnz b, print_float_frac_loop
- pop dph
- pop dpl
print_float_frac_roundoff:
// Now it's time to round-off the BCD digits to the desired precision.
clr a
rl a
rl a
anl a, #0xFC
- lcall __fs_rshift_a // divide r4/r3/r2/r1 by 10^frac_field_width
+ mov dph, r0 // fs_rshift_a will overwrite r0 & dpl
+ lcall fs_rshift_a // divide r4/r3/r2/r1 by 10^frac_field_width
mov a, r5
add a, r1 // add rounding to fractional part
da a
addc a, r3
da a
mov _float_frac_bcd+1, a
- mov a, exp_b
+ mov a, dph
addc a, r4
da a
mov _float_frac_bcd+0, a
mov sign_b, c // keep fractional carry in sign_b
+ pop dph
+ pop dpl
print_float_int:
// Time to work on the integer portion... fetch the float again, check
// size (exponent), scale to integer, add the fraction's carry, and
push ar0
clr c
mov a, #158 // check for large float we can't print
- subb a, exp_a
+ subb a, r7
jnc print_float_size_ok
printf_float_too_big:
// TODO: should print some sort of overflow error??
ljmp printf_format_loop
print_float_size_ok:
- lcall __fs_rshift_a
+ push dpl
+ lcall fs_rshift_a
+ pop dpl
jnb sign_b, print_float_do_int
// if we get here, the fractional round off caused the
// integer part to increment. Add 1 for a proper result
#if 0
pm2_print_float:
- mov a, exp_a
+ mov a, r7
lcall pm2_entry_phex
mov a, #0x20
lcall pm2_entry_cout
#endif
// Fetch a float from the va_args and put it into
- // exp_a/r4/r3/r2 and also clear r1 and preset
+ // r7(exp) r4/r3/r2(mant) and also clear r1 and preset
// the flags
printf_get_float:
mov a, @r0
mov a, r1
rlc a
mov _negative_flag, c
- mov exp_a, a
+ mov r7, a
jz printf_get_float_2
orl ar4, #0x80
printf_get_float_2:
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