/* Derived from: */
/*
* x86 CPU test
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <math.h>
/**********************************************/
void test_fops(double a, double b)
{
printf("a=%f b=%f a+b=%f\n", a, b, a + b);
printf("a=%f b=%f a-b=%f\n", a, b, a - b);
printf("a=%f b=%f a*b=%f\n", a, b, a * b);
printf("a=%f b=%f a/b=%f\n", a, b, a / b);
printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
printf("a=%f sin(a)=%f\n", a, sin(a));
printf("a=%f cos(a)=%f\n", a, cos(a));
printf("a=%f tan(a)=%f\n", a, tan(a));
printf("a=%f log(a)=%f\n", a, log(a));
printf("a=%f exp(a)=%f\n", a, exp(a));
printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
/* just to test some op combining */
printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
}
#define CC_C 0x0001
#define CC_P 0x0004
#define CC_A 0x0010
#define CC_Z 0x0040
#define CC_S 0x0080
#define CC_O 0x0800
void test_fcmp(double a, double b)
{
printf("(%f<%f)=%d\n",
a, b, a < b);
printf("(%f<=%f)=%d\n",
a, b, a <= b);
printf("(%f==%f)=%d\n",
a, b, a == b);
printf("(%f>%f)=%d\n",
a, b, a > b);
printf("(%f<=%f)=%d\n",
a, b, a >= b);
{
unsigned int eflags;
/* test f(u)comi instruction */
asm("fcomi %2, %1\n"
"pushf\n"
"pop %0\n"
: "=r" (eflags)
: "t" (a), "u" (b));
printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
}
}
void test_fcvt(double a)
{
float fa;
long double la;
int16_t fpuc;
int i;
int64_t lla;
int ia;
int16_t wa;
double ra;
fa = a;
la = a;
printf("(float)%f = %f\n", a, fa);
printf("(long double)%f = %Lf\n", a, la);
printf("a=%016llx\n", *(long long *)&a);
printf("la=%016llx %04x\n", *(long long *)&la,
*(unsigned short *)((char *)(&la) + 8));
/* test all roundings */
asm volatile ("fstcw %0" : "=m" (fpuc));
for(i=0;i<4;i++) {
int16_t tmp = (fpuc & ~0x0c00) | (i << 10);
asm volatile ("fldcw %0" : : "m" (tmp));
asm volatile ("fists %0" : "=m" (wa) : "t" (a));
asm volatile ("fistl %0" : "=m" (ia) : "t" (a));
asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st");
asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a));
asm volatile ("fldcw %0" : : "m" (fpuc));
printf("(short)a = %d\n", wa);
printf("(int)a = %d\n", ia);
printf("(int64_t)a = %lld\n", lla);
printf("rint(a) = %f\n", ra);
}
}
#define TEST(N) \
asm("fld" #N : "=t" (a)); \
printf("fld" #N "= %f\n", a);
void test_fconst(void)
{
double a;
TEST(1);
TEST(l2t);
TEST(l2e);
TEST(pi);
TEST(lg2);
TEST(ln2);
TEST(z);
}
void test_fbcd(double a)
{
unsigned short bcd[5];
double b;
asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st");
asm("fbld %1" : "=t" (b) : "m" (bcd[0]));
printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b);
}
#define TEST_ENV(env, save, restore)\
{\
memset((env), 0xaa, sizeof(*(env)));\
for(i=0;i<5;i++)\
asm volatile ("fldl %0" : : "m" (dtab[i]));\
asm(save " %0\n" : : "m" (*(env)));\
asm(restore " %0\n": : "m" (*(env)));\
for(i=0;i<5;i++)\
asm volatile ("fstpl %0" : "=m" (rtab[i]));\
for(i=0;i<5;i++)\
printf("res[%d]=%f\n", i, rtab[i]);\
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
(env)->fpuc,\
(env)->fpus & 0xff00,\
(env)->fptag);\
}
void test_fenv(void)
{
struct __attribute__((packed)) {
uint16_t fpuc;
uint16_t dummy1;
uint16_t fpus;
uint16_t dummy2;
uint16_t fptag;
uint16_t dummy3;
uint32_t ignored[4];
long double fpregs[8];
} float_env32;
struct __attribute__((packed)) {
uint16_t fpuc;
uint16_t fpus;
uint16_t fptag;
uint16_t ignored[4];
long double fpregs[8];
} float_env16;
double dtab[8];
double rtab[8];
int i;
for(i=0;i<8;i++)
dtab[i] = i + 1;
TEST_ENV(&float_env16, "data16/fnstenv", "data16/fldenv");
TEST_ENV(&float_env16, "data16/fnsave", "data16/frstor");
TEST_ENV(&float_env32, "fnstenv", "fldenv");
TEST_ENV(&float_env32, "fnsave", "frstor");
/* test for ffree */
for(i=0;i<5;i++)
asm volatile ("fldl %0" : : "m" (dtab[i]));
asm volatile("ffree %st(2)");
asm volatile ("fnstenv %0\n" : : "m" (float_env32));
asm volatile ("fninit");
printf("fptag=%04x\n", float_env32.fptag);
}
#define TEST_FCMOV(a, b, eflags, CC)\
{\
double res;\
asm("push %3\n"\
"popf\n"\
"fcmov" CC " %2, %0\n"\
: "=t" (res)\
: "0" (a), "u" (b), "g" (eflags));\
printf("fcmov%s eflags=0x%04x-> %f\n", \
CC, eflags, res);\
}
void test_fcmov(void)
{
double a, b;
int eflags, i;
a = 1.0;
b = 2.0;
for(i = 0; i < 4; i++) {
eflags = 0;
if (i & 1)
eflags |= CC_C;
if (i & 2)
eflags |= CC_Z;
TEST_FCMOV(a, b, eflags, "b");
TEST_FCMOV(a, b, eflags, "e");
TEST_FCMOV(a, b, eflags, "be");
TEST_FCMOV(a, b, eflags, "nb");
TEST_FCMOV(a, b, eflags, "ne");
TEST_FCMOV(a, b, eflags, "nbe");
}
TEST_FCMOV(a, b, 0, "u");
TEST_FCMOV(a, b, CC_P, "u");
TEST_FCMOV(a, b, 0, "nu");
TEST_FCMOV(a, b, CC_P, "nu");
}
void test_floats(void)
{
test_fops(2, 3);
test_fops(1.4, -5);
test_fcmp(2, -1);
test_fcmp(2, 2);
test_fcmp(2, 3);
test_fcvt(0.5);
test_fcvt(-0.5);
test_fcvt(1.0/7.0);
test_fcvt(-1.0/9.0);
test_fcvt(32768);
test_fcvt(-1e20);
test_fconst();
}
int main ( void )
{
test_floats();
return 0;
}