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2000-12-15 Ben Elliston <bje@redhat.com>

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* sim-fpu.h (sim_fpu_printn_fpu): Declare.
	* sim-fpu.c (print_bits): Add digits parameter. Print only as many
	trailing digits as specified (-1 to print all digits).
	(sim_fpu_print_fpu): New wrapper around sim_fpu_printn_fpu.
	(sim_fpu_printn_fpu): Rename from sim_fpu_print_fpu; update calls
	to print_bits ().
This commit is contained in:
Ben Elliston 2000-12-23 11:51:04 +00:00
parent b21f0843bf
commit b94c096644
3 changed files with 36 additions and 31 deletions
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9
sim/common/ChangeLog
View file

@ -1,3 +1,12 @@
2000-12-15 Ben Elliston <bje@redhat.com>
* sim-fpu.h (sim_fpu_printn_fpu): Declare.
* sim-fpu.c (print_bits): Add digits parameter. Print only as many
trailing digits as specified (-1 to print all digits).
(sim_fpu_print_fpu): New wrapper around sim_fpu_printn_fpu.
(sim_fpu_printn_fpu): Rename from sim_fpu_print_fpu; update calls
to print_bits ().
2000-12-13 Ben Elliston <bje@redhat.com> 2000-12-13 Ben Elliston <bje@redhat.com>
* cgen.sh: Set prefix/PREFIX (append ISA if applicable). Factor * cgen.sh: Set prefix/PREFIX (append ISA if applicable). Factor

51
sim/common/sim-fpu.c
View file

@ -51,25 +51,30 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "sim-assert.h" #include "sim-assert.h"
/* Debugging support. */ /* Debugging support.
If digits is -1, then print all digits. */
static void static void
print_bits (unsigned64 x, print_bits (unsigned64 x,
int msbit, int msbit,
int digits,
sim_fpu_print_func print, sim_fpu_print_func print,
void *arg) void *arg)
{ {
unsigned64 bit = LSBIT64 (msbit); unsigned64 bit = LSBIT64 (msbit);
int i = 4; int i = 4;
while (bit) while (bit && digits)
{ {
if (i == 0) if (i == 0)
print (arg, ","); print (arg, ",");
if ((x & bit)) if ((x & bit))
print (arg, "1"); print (arg, "1");
else else
print (arg, "0"); print (arg, "0");
bit >>= 1; bit >>= 1;
if (digits > 0) digits--;
i = (i + 1) % 4; i = (i + 1) % 4;
} }
} }
@ -1375,14 +1380,6 @@ sim_fpu_mul (sim_fpu *f,
ASSERT (high >= LSBIT64 ((NR_FRAC_GUARD * 2) - 64)); ASSERT (high >= LSBIT64 ((NR_FRAC_GUARD * 2) - 64));
ASSERT (LSBIT64 (((NR_FRAC_GUARD + 1) * 2) - 64) < IMPLICIT_1); ASSERT (LSBIT64 (((NR_FRAC_GUARD + 1) * 2) - 64) < IMPLICIT_1);
#if 0
printf ("\n");
print_bits (high, 63, (sim_fpu_print_func*)fprintf, stdout);
printf (";");
print_bits (low, 63, (sim_fpu_print_func*)fprintf, stdout);
printf ("\n");
#endif
/* normalize */ /* normalize */
do do
{ {
@ -1394,13 +1391,6 @@ sim_fpu_mul (sim_fpu *f,
} }
while (high < IMPLICIT_1); while (high < IMPLICIT_1);
#if 0
print_bits (high, 63, (sim_fpu_print_func*)fprintf, stdout);
printf (";");
print_bits (low, 63, (sim_fpu_print_func*)fprintf, stdout);
printf ("\n");
#endif
ASSERT (high >= IMPLICIT_1 && high < IMPLICIT_2); ASSERT (high >= IMPLICIT_1 && high < IMPLICIT_2);
if (low != 0) if (low != 0)
{ {
@ -1530,16 +1520,6 @@ sim_fpu_div (sim_fpu *f,
numerator <<= 1; numerator <<= 1;
} }
#if 0
printf ("\n");
print_bits (quotient, 63, (sim_fpu_print_func*)fprintf, stdout);
printf ("\n");
print_bits (numerator, 63, (sim_fpu_print_func*)fprintf, stdout);
printf ("\n");
print_bits (denominator, 63, (sim_fpu_print_func*)fprintf, stdout);
printf ("\n");
#endif
/* discard (but save) the extra bits */ /* discard (but save) the extra bits */
if ((quotient & LSMASK64 (NR_SPARE -1, 0))) if ((quotient & LSMASK64 (NR_SPARE -1, 0)))
quotient = (quotient >> NR_SPARE) | 1; quotient = (quotient >> NR_SPARE) | 1;
@ -2476,18 +2456,27 @@ INLINE_SIM_FPU (void)
sim_fpu_print_fpu (const sim_fpu *f, sim_fpu_print_fpu (const sim_fpu *f,
sim_fpu_print_func *print, sim_fpu_print_func *print,
void *arg) void *arg)
{
sim_fpu_printn_fpu (f, print, -1, arg);
}
INLINE_SIM_FPU (void)
sim_fpu_printn_fpu (const sim_fpu *f,
sim_fpu_print_func *print,
int digits,
void *arg)
{ {
print (arg, "%s", f->sign ? "-" : "+"); print (arg, "%s", f->sign ? "-" : "+");
switch (f->class) switch (f->class)
{ {
case sim_fpu_class_qnan: case sim_fpu_class_qnan:
print (arg, "0."); print (arg, "0.");
print_bits (f->fraction, NR_FRAC_GUARD - 1, print, arg); print_bits (f->fraction, NR_FRAC_GUARD - 1, digits, print, arg);
print (arg, "*QuietNaN"); print (arg, "*QuietNaN");
break; break;
case sim_fpu_class_snan: case sim_fpu_class_snan:
print (arg, "0."); print (arg, "0.");
print_bits (f->fraction, NR_FRAC_GUARD - 1, print, arg); print_bits (f->fraction, NR_FRAC_GUARD - 1, digits, print, arg);
print (arg, "*SignalNaN"); print (arg, "*SignalNaN");
break; break;
case sim_fpu_class_zero: case sim_fpu_class_zero:
@ -2499,8 +2488,8 @@ sim_fpu_print_fpu (const sim_fpu *f,
case sim_fpu_class_number: case sim_fpu_class_number:
case sim_fpu_class_denorm: case sim_fpu_class_denorm:
print (arg, "1."); print (arg, "1.");
print_bits (f->fraction, NR_FRAC_GUARD - 1, print, arg); print_bits (f->fraction, NR_FRAC_GUARD - 1, digits, print, arg);
print (arg, "*2^%+-5d", f->normal_exp); print (arg, "*2^%+d", f->normal_exp);
ASSERT (f->fraction >= IMPLICIT_1); ASSERT (f->fraction >= IMPLICIT_1);
ASSERT (f->fraction < IMPLICIT_2); ASSERT (f->fraction < IMPLICIT_2);
} }

7
sim/common/sim-fpu.h
View file

@ -402,10 +402,17 @@ extern const sim_fpu sim_fpu_max64;
typedef void sim_fpu_print_func (void *, char *, ...); typedef void sim_fpu_print_func (void *, char *, ...);
/* Print a sim_fpu with full precision. */
INLINE_SIM_FPU (void) sim_fpu_print_fpu (const sim_fpu *f, INLINE_SIM_FPU (void) sim_fpu_print_fpu (const sim_fpu *f,
sim_fpu_print_func *print, sim_fpu_print_func *print,
void *arg); void *arg);
/* Print a sim_fpu with `n' trailing digits. */
INLINE_SIM_FPU (void) sim_fpu_printn_fpu (const sim_fpu *f,
sim_fpu_print_func *print,
int digits,
void *arg);
INLINE_SIM_FPU (void) sim_fpu_print_status (int status, INLINE_SIM_FPU (void) sim_fpu_print_status (int status,
sim_fpu_print_func *print, sim_fpu_print_func *print,
void *arg); void *arg);