1 #include <stdio.h> 2 3 /* float class */ 4 #define FLOAT_CLASS_SIGNALING_NAN 0x001 5 #define FLOAT_CLASS_QUIET_NAN 0x002 6 #define FLOAT_CLASS_NEGATIVE_INFINITY 0x004 7 #define FLOAT_CLASS_NEGATIVE_NORMAL 0x008 8 #define FLOAT_CLASS_NEGATIVE_SUBNORMAL 0x010 9 #define FLOAT_CLASS_NEGATIVE_ZERO 0x020 10 #define FLOAT_CLASS_POSITIVE_INFINITY 0x040 11 #define FLOAT_CLASS_POSITIVE_NORMAL 0x080 12 #define FLOAT_CLASS_POSITIVE_SUBNORMAL 0x100 13 #define FLOAT_CLASS_POSITIVE_ZERO 0x200 14 15 #define TEST_FCLASS(N) \ 16 void test_fclass_##N(long s) \ 17 { \ 18 double fd; \ 19 long rd; \ 20 \ 21 asm volatile("fclass."#N" %0, %2\n\t" \ 22 "movfr2gr."#N" %1, %2\n\t" \ 23 : "=f"(fd), "=r"(rd) \ 24 : "f"(s) \ 25 : ); \ 26 switch (rd) { \ 27 case FLOAT_CLASS_SIGNALING_NAN: \ 28 case FLOAT_CLASS_QUIET_NAN: \ 29 case FLOAT_CLASS_NEGATIVE_INFINITY: \ 30 case FLOAT_CLASS_NEGATIVE_NORMAL: \ 31 case FLOAT_CLASS_NEGATIVE_SUBNORMAL: \ 32 case FLOAT_CLASS_NEGATIVE_ZERO: \ 33 case FLOAT_CLASS_POSITIVE_INFINITY: \ 34 case FLOAT_CLASS_POSITIVE_NORMAL: \ 35 case FLOAT_CLASS_POSITIVE_SUBNORMAL: \ 36 case FLOAT_CLASS_POSITIVE_ZERO: \ 37 break; \ 38 default: \ 39 printf("fclass."#N" test failed.\n"); \ 40 break; \ 41 } \ 42 } 43 44 /* 45 * float format 46 * type | S | Exponent | Fraction | example value 47 * 31 | 30 --23 | 22 | 21 --0 | 48 * | bit | 49 * SNAN 0/1 | 0xFF | 0 | !=0 | 0x7FBFFFFF 50 * QNAN 0/1 | 0xFF | 1 | | 0x7FCFFFFF 51 * -infinity 1 | 0xFF | 0 | 0xFF800000 52 * -normal 1 | [1, 0xFE] | [0, 0x7FFFFF]| 0xFF7FFFFF 53 * -subnormal 1 | 0 | !=0 | 0x807FFFFF 54 * -0 1 | 0 | 0 | 0x80000000 55 * +infinity 0 | 0xFF | 0 | 0x7F800000 56 * +normal 0 | [1, 0xFE] | [0, 0x7FFFFF]| 0x7F7FFFFF 57 * +subnormal 0 | 0 | !=0 | 0x007FFFFF 58 * +0 0 | 0 | 0 | 0x00000000 59 */ 60 61 long float_snan = 0x7FBFFFFF; 62 long float_qnan = 0x7FCFFFFF; 63 long float_neg_infinity = 0xFF800000; 64 long float_neg_normal = 0xFF7FFFFF; 65 long float_neg_subnormal = 0x807FFFFF; 66 long float_neg_zero = 0x80000000; 67 long float_post_infinity = 0x7F800000; 68 long float_post_normal = 0x7F7FFFFF; 69 long float_post_subnormal = 0x007FFFFF; 70 long float_post_zero = 0x00000000; 71 72 /* 73 * double format 74 * type | S | Exponent | Fraction | example value 75 * 63 | 62 -- 52 | 51 | 50 -- 0 | 76 * | bit | 77 * SNAN 0/1 | 0x7FF | 0 | !=0 | 0x7FF7FFFFFFFFFFFF 78 * QNAN 0/1 | 0x7FF | 1 | | 0x7FFFFFFFFFFFFFFF 79 * -infinity 1 | 0x7FF | 0 | 0xFFF0000000000000 80 * -normal 1 |[1, 0x7FE] | | 0xFFEFFFFFFFFFFFFF 81 * -subnormal 1 | 0 | !=0 | 0x8007FFFFFFFFFFFF 82 * -0 1 | 0 | 0 | 0x8000000000000000 83 * +infinity 0 | 0x7FF | 0 | 0x7FF0000000000000 84 * +normal 0 |[1, 0x7FE] | | 0x7FEFFFFFFFFFFFFF 85 * +subnormal 0 | 0 | !=0 | 0x000FFFFFFFFFFFFF 86 * +0 0 | 0 | 0 | 0x0000000000000000 87 */ 88 89 long double_snan = 0x7FF7FFFFFFFFFFFF; 90 long double_qnan = 0x7FFFFFFFFFFFFFFF; 91 long double_neg_infinity = 0xFFF0000000000000; 92 long double_neg_normal = 0xFFEFFFFFFFFFFFFF; 93 long double_neg_subnormal = 0x8007FFFFFFFFFFFF; 94 long double_neg_zero = 0x8000000000000000; 95 long double_post_infinity = 0x7FF0000000000000; 96 long double_post_normal = 0x7FEFFFFFFFFFFFFF; 97 long double_post_subnormal = 0x000FFFFFFFFFFFFF; 98 long double_post_zero = 0x0000000000000000; 99 100 TEST_FCLASS(s) 101 TEST_FCLASS(d) 102 103 int main() 104 { 105 /* fclass.s */ 106 test_fclass_s(float_snan); 107 test_fclass_s(float_qnan); 108 test_fclass_s(float_neg_infinity); 109 test_fclass_s(float_neg_normal); 110 test_fclass_s(float_neg_subnormal); 111 test_fclass_s(float_neg_zero); 112 test_fclass_s(float_post_infinity); 113 test_fclass_s(float_post_normal); 114 test_fclass_s(float_post_subnormal); 115 test_fclass_s(float_post_zero); 116 117 /* fclass.d */ 118 test_fclass_d(double_snan); 119 test_fclass_d(double_qnan); 120 test_fclass_d(double_neg_infinity); 121 test_fclass_d(double_neg_normal); 122 test_fclass_d(double_neg_subnormal); 123 test_fclass_d(double_neg_zero); 124 test_fclass_d(double_post_infinity); 125 test_fclass_d(double_post_normal); 126 test_fclass_d(double_post_subnormal); 127 test_fclass_d(double_post_zero); 128 129 return 0; 130 } 131