#include <stdio.h> /* float class */ #define FLOAT_CLASS_SIGNALING_NAN 0x001 #define FLOAT_CLASS_QUIET_NAN 0x002 #define FLOAT_CLASS_NEGATIVE_INFINITY 0x004 #define FLOAT_CLASS_NEGATIVE_NORMAL 0x008 #define FLOAT_CLASS_NEGATIVE_SUBNORMAL 0x010 #define FLOAT_CLASS_NEGATIVE_ZERO 0x020 #define FLOAT_CLASS_POSITIVE_INFINITY 0x040 #define FLOAT_CLASS_POSITIVE_NORMAL 0x080 #define FLOAT_CLASS_POSITIVE_SUBNORMAL 0x100 #define FLOAT_CLASS_POSITIVE_ZERO 0x200 #define TEST_FCLASS(N) \ void test_fclass_##N(long s) \ { \ double fd; \ long rd; \ \ asm volatile("fclass."#N" %0, %2\n\t" \ "movfr2gr."#N" %1, %2\n\t" \ : "=f"(fd), "=r"(rd) \ : "f"(s) \ : ); \ switch (rd) { \ case FLOAT_CLASS_SIGNALING_NAN: \ case FLOAT_CLASS_QUIET_NAN: \ case FLOAT_CLASS_NEGATIVE_INFINITY: \ case FLOAT_CLASS_NEGATIVE_NORMAL: \ case FLOAT_CLASS_NEGATIVE_SUBNORMAL: \ case FLOAT_CLASS_NEGATIVE_ZERO: \ case FLOAT_CLASS_POSITIVE_INFINITY: \ case FLOAT_CLASS_POSITIVE_NORMAL: \ case FLOAT_CLASS_POSITIVE_SUBNORMAL: \ case FLOAT_CLASS_POSITIVE_ZERO: \ break; \ default: \ printf("fclass."#N" test failed.\n"); \ break; \ } \ } /* * float format * type | S | Exponent | Fraction | example value * 31 | 30 --23 | 22 | 21 --0 | * | bit | * SNAN 0/1 | 0xFF | 0 | !=0 | 0x7FBFFFFF * QNAN 0/1 | 0xFF | 1 | | 0x7FCFFFFF * -infinity 1 | 0xFF | 0 | 0xFF800000 * -normal 1 | [1, 0xFE] | [0, 0x7FFFFF]| 0xFF7FFFFF * -subnormal 1 | 0 | !=0 | 0x807FFFFF * -0 1 | 0 | 0 | 0x80000000 * +infinity 0 | 0xFF | 0 | 0x7F800000 * +normal 0 | [1, 0xFE] | [0, 0x7FFFFF]| 0x7F7FFFFF * +subnormal 0 | 0 | !=0 | 0x007FFFFF * +0 0 | 0 | 0 | 0x00000000 */ long float_snan = 0x7FBFFFFF; long float_qnan = 0x7FCFFFFF; long float_neg_infinity = 0xFF800000; long float_neg_normal = 0xFF7FFFFF; long float_neg_subnormal = 0x807FFFFF; long float_neg_zero = 0x80000000; long float_post_infinity = 0x7F800000; long float_post_normal = 0x7F7FFFFF; long float_post_subnormal = 0x007FFFFF; long float_post_zero = 0x00000000; /* * double format * type | S | Exponent | Fraction | example value * 63 | 62 -- 52 | 51 | 50 -- 0 | * | bit | * SNAN 0/1 | 0x7FF | 0 | !=0 | 0x7FF7FFFFFFFFFFFF * QNAN 0/1 | 0x7FF | 1 | | 0x7FFFFFFFFFFFFFFF * -infinity 1 | 0x7FF | 0 | 0xFFF0000000000000 * -normal 1 |[1, 0x7FE] | | 0xFFEFFFFFFFFFFFFF * -subnormal 1 | 0 | !=0 | 0x8007FFFFFFFFFFFF * -0 1 | 0 | 0 | 0x8000000000000000 * +infinity 0 | 0x7FF | 0 | 0x7FF0000000000000 * +normal 0 |[1, 0x7FE] | | 0x7FEFFFFFFFFFFFFF * +subnormal 0 | 0 | !=0 | 0x000FFFFFFFFFFFFF * +0 0 | 0 | 0 | 0x0000000000000000 */ long double_snan = 0x7FF7FFFFFFFFFFFF; long double_qnan = 0x7FFFFFFFFFFFFFFF; long double_neg_infinity = 0xFFF0000000000000; long double_neg_normal = 0xFFEFFFFFFFFFFFFF; long double_neg_subnormal = 0x8007FFFFFFFFFFFF; long double_neg_zero = 0x8000000000000000; long double_post_infinity = 0x7FF0000000000000; long double_post_normal = 0x7FEFFFFFFFFFFFFF; long double_post_subnormal = 0x000FFFFFFFFFFFFF; long double_post_zero = 0x0000000000000000; TEST_FCLASS(s) TEST_FCLASS(d) int main() { /* fclass.s */ test_fclass_s(float_snan); test_fclass_s(float_qnan); test_fclass_s(float_neg_infinity); test_fclass_s(float_neg_normal); test_fclass_s(float_neg_subnormal); test_fclass_s(float_neg_zero); test_fclass_s(float_post_infinity); test_fclass_s(float_post_normal); test_fclass_s(float_post_subnormal); test_fclass_s(float_post_zero); /* fclass.d */ test_fclass_d(double_snan); test_fclass_d(double_qnan); test_fclass_d(double_neg_infinity); test_fclass_d(double_neg_normal); test_fclass_d(double_neg_subnormal); test_fclass_d(double_neg_zero); test_fclass_d(double_post_infinity); test_fclass_d(double_post_normal); test_fclass_d(double_post_subnormal); test_fclass_d(double_post_zero); return 0; }