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gplibt02
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tfix16.cc
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C/C++ Source or Header
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1993-07-24
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3KB
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110 lines
//
// testFix16.cc : test Fix16/32 classes
//
#include <xfix16.h>
// This set of inlines (instead of a macro) is to force the side effects
// of evaluating y to happen before x is printed.
inline void check(char *x, int y) { cout << x << " = " << (y) << "\n"; }
inline void check(char *x, double y) { cout << x << " = " << (y) << "\n"; }
inline void check(char *x, Fix16 y) { cout << x << " = " << (y) << "\n"; }
inline void check(char *x, Fix32 y) { cout << x << " = " << (y) << "\n"; }
void test16() {
cout << "Fix16: identities should be displayed\n";
Fix16 a; check("0",a);
Fix16 b = .5; check(".5",b);
Fix16 c = -.5; check("-.5",c);
Fix16 d = .1; check(".1",d);
Fix16 e = b; check(".5",e);
check(".5",a = b);
check(".25",a = .25);
check("8192",mantissa(a));
mantissa(a)=8192;
check(".25",a);
check(".25",value(a));
check(".25",+a);
check("-.25",-a);
check(".1 + .5",d+b);
check(".1 - .5",d-b);
check(".1 * .5",d*b);
check(".1 * 3",d*3);
check(".1 * -3",d*-3);
check(".1 / .5",d/b);
check(".1 << 1",d<<1);
check("-.5 >> 2",c>>2);
check(".1 == .5",d == b);
check(".1 != .5",d != b);
check(".1 > .5",d > b);
check(".5 <= -.5",b <= c);
cout << "Fix16: range errors ignored and overflows saturated\n";
set_Fix16_overflow_handler(Fix16_overflow_saturate);
set_Fix16_range_error_handler(Fix16_ignore);
Fix16 f = 1.1; check("1.1",f);
Fix16 g = .7;
check(".7 + .5",g+b);
check("-.5 - .7",c-g);
check(".5 / .1",b/d);
}
void test32() {
cout << "Fix32: identities should be displayed\n";
Fix32 a; check("0",a);
Fix32 b = .5; check(".5",b);
Fix32 c = -.5; check("-.5",c);
Fix32 d = .1; check(".1",d);
Fix32 e = b; check(".5",e);
check(".5",a = b);
check(".25",a = .25);
check("536870912",mantissa(a));
mantissa(a)=536870912;
check(".25",a);
check(".25",value(a));
check(".25",+a);
check("-.25",-a);
check(".1 + .5",d+b);
check(".1 - .5",d-b);
check(".1 * .5",d*b);
check(".1 * 3",d*3);
check(".1 * -3",d*-3);
check(".1 / .5",d/b);
check(".1 << 1",d<<1);
check("-.5 >> 2",c>>2);
check(".1 == .5",d == b);
check(".1 != .5",d != b);
check(".1 > .5",d > b);
check(".5 <= -.5",b <= c);
cout << "Fix32: range errors reported and overflows reported\n";
set_Fix32_overflow_handler(Fix32_warning);
set_Fix32_range_error_handler(Fix32_warning);
Fix32 f = 1.1; check("1.1",f);
Fix32 g = .7;
check(".7 + .5",g+b);
check("-.5 - .7",c-g);
check(".5 / .1",b/d);
}
main() {
test16();
test32();
}