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#include "test.h"
#include <ieeefp.h>
/* Test fp getround and fp setround */
void
test_getround (void)
{
newfunc("fpgetround/fpsetround");
line(1);
fpsetround(FP_RN);
test_iok(fpgetround(), FP_RN);
line(2);
fpsetround(FP_RM);
test_iok(fpgetround(), FP_RM);
line(3);
fpsetround(FP_RP);
test_iok(fpgetround(), FP_RP);
line(4);
fpsetround(FP_RZ);
test_iok(fpgetround(), FP_RZ);
}
/* And fpset/fpgetmask */
void
test_getmask (void)
{
newfunc("fpsetmask/fpgetmask");
line(1);
fpsetmask(FP_X_INV);
test_iok(fpgetmask(),FP_X_INV);
line(2);
fpsetmask(FP_X_DX);
test_iok(fpgetmask(),FP_X_DX);
line(3);
fpsetmask(FP_X_OFL );
test_iok(fpgetmask(),FP_X_OFL);
line(4);
fpsetmask(FP_X_UFL);
test_iok(fpgetmask(),FP_X_UFL);
line(5);
fpsetmask(FP_X_IMP);
test_iok(fpgetmask(),FP_X_IMP);
}
void
test_getsticky (void)
{
newfunc("fpsetsticky/fpgetsticky");
line(1);
fpsetsticky(FP_X_INV);
test_iok(fpgetsticky(),FP_X_INV);
line(2);
fpsetsticky(FP_X_DX);
test_iok(fpgetsticky(),FP_X_DX);
line(3);
fpsetsticky(FP_X_OFL );
test_iok(fpgetsticky(),FP_X_OFL);
line(4);
fpsetsticky(FP_X_UFL);
test_iok(fpgetsticky(),FP_X_UFL);
line(5);
fpsetsticky(FP_X_IMP);
test_iok(fpgetsticky(),FP_X_IMP);
}
void
test_getroundtoi (void)
{
newfunc("fpsetroundtoi/fpgetroundtoi");
line(1);
fpsetroundtoi(FP_RDI_TOZ);
test_iok(fpgetroundtoi(),FP_RDI_TOZ);
line(2);
fpsetroundtoi(FP_RDI_RD);
test_iok(fpgetroundtoi(),FP_RDI_RD);
}
double
dnumber (int msw,
int lsw)
{
__ieee_double_shape_type v;
v.parts.lsw = lsw;
v.parts.msw = msw;
return v.value;
}
/* Lets see if changing the rounding alters the arithmetic.
Test by creating numbers which will have to be rounded when
added, and seeing what happens to them */
/* Keep them out here to stop the compiler from folding the results */
double n;
double m;
double add_rounded_up;
double add_rounded_down;
double sub_rounded_down ;
double sub_rounded_up ;
double r1,r2,r3,r4;
void
test_round (void)
{
n = dnumber(0x40000000, 0x00000008); /* near 2 */
m = dnumber(0x40400000, 0x00000003); /* near 3.4 */
add_rounded_up = dnumber(0x40410000, 0x00000004); /* For RN, RP */
add_rounded_down = dnumber(0x40410000, 0x00000003); /* For RM, RZ */
sub_rounded_down = dnumber(0xc0410000, 0x00000004); /* for RN, RM */
sub_rounded_up = dnumber(0xc0410000, 0x00000003); /* for RP, RZ */
newfunc("fpsetround");
line(1);
fpsetround(FP_RN);
r1 = n + m;
test_mok(r1, add_rounded_up, 64);
line(2);
fpsetround(FP_RM);
r2 = n + m;
test_mok(r2, add_rounded_down, 64);
fpsetround(FP_RP);
line(3);
r3 = n + m;
test_mok(r3,add_rounded_up, 64);
fpsetround(FP_RZ);
line(4);
r4 = n + m;
test_mok(r4,add_rounded_down,64);
fpsetround(FP_RN);
r1 = - n - m;
line(5);
test_mok(r1,sub_rounded_down,64);
fpsetround(FP_RM);
r2 = - n - m;
line(6);
test_mok(r2,sub_rounded_down,64);
fpsetround(FP_RP);
r3 = - n - m;
line(7);
test_mok(r3,sub_rounded_up,64);
fpsetround(FP_RZ);
r4 = - n - m;
line(8);
test_mok(r4,sub_rounded_up,64);
}
void
test_ieee (void)
{
fp_rnd old = fpgetround();
test_getround();
test_getmask();
test_getsticky();
test_getroundtoi();
test_round();
fpsetround(old);
}
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