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| 1 | typedef union {
| |
| 2 | float f; | |
| 3 | uint32_t u32; | |
| 4 | struct {
| |
| 5 | uint32_t m:23; | |
| 6 | uint32_t x:8; | |
| 7 | uint32_t s:1; | |
| 8 | }; | |
| 9 | } f_un; | |
| 10 | ||
| 11 | ||
| 12 | void put_f32(float f32){
| |
| 13 | f_un fun; | |
| 14 | uint32_t uv[10], mlsft, m, x, a, b, z, c; | |
| 15 | int i; | |
| 16 | char pad[40], *pp; | |
| 17 | union {
| |
| 18 | uint64_t u64; | |
| 19 | uint32_t u32[2]; | |
| 20 | } u6432; | |
| 21 | union {
| |
| 22 | uint32_t u32; | |
| 23 | uint16_t u16[2]; | |
| 24 | } d, t; | |
| 25 | ||
| 26 | fun.f = f32; | |
| 27 | if(fun.x == 0xFF){
| |
| 28 | if(fun.m == 0){
| |
| 29 | if(fun.s) | |
| 30 | putchar('-');
| |
| 31 | putchar('i');
| |
| 32 | putchar('n');
| |
| 33 | putchar('f');
| |
| 34 | } else {
| |
| 35 | putchar('N');
| |
| 36 | putchar('a');
| |
| 37 | putchar('N');
| |
| 38 | } | |
| 39 | return; | |
| 40 | } | |
| 41 | if(fun.s) | |
| 42 | putchar('-');
| |
| 43 | ||
| 44 | x = fun.x - 127; | |
| 45 | m = fun.m; | |
| 46 | if(fun.x){
| |
| 47 | m = fun.m | 1 << 23; | |
| 48 | } else {
| |
| 49 | x++; | |
| 50 | - | else |
| 50 | + | |
| 51 | - | uv[a + 1] = 0; |
| 51 | + | |
| 52 | for(i = 0; i < 10; i++){
| |
| 53 | uv[i] = 0; | |
| 54 | } | |
| 55 | ||
| 56 | a = mlsft >> 5; | |
| 57 | b = mlsft & 0x1F; | |
| 58 | uv[a] = m << b; | |
| 59 | if(b) | |
| 60 | uv[a + 1] = m >> (32 - b); | |
| 61 | ||
| 62 | pp = pad; | |
| 63 | b = a + 1; | |
| 64 | do {
| |
| 65 | for(i = b, c = z = 0; i >= 5; i--){
| |
| 66 | t.u32 = uv[i]; | |
| 67 | d.u16[1] = c; | |
| 68 | d.u16[0] = t.u16[1]; | |
| 69 | t.u16[1] = d.u32 / 10; | |
| 70 | c = d.u32 % 10; | |
| 71 | ||
| 72 | d.u16[1] = c; | |
| 73 | d.u16[0] = t.u16[0]; | |
| 74 | t.u16[0] = d.u32 / 10; | |
| 75 | c = d.u32 % 10; | |
| 76 | ||
| 77 | uv[i] = t.u32; | |
| 78 | /* | |
| 79 | u6432.u32[1] = c; | |
| 80 | u6432.u32[0] = uv[i]; | |
| 81 | uv[i] = u6432.u64 / 10; | |
| 82 | c = u6432.u64 % 10; | |
| 83 | */ | |
| 84 | ||
| 85 | if(i == b && uv[i] == 0) | |
| 86 | b--; | |
| 87 | z |= uv[i]; | |
| 88 | } | |
| 89 | *pp++ = c + '0'; | |
| 90 | } while(z); | |
| 91 | while(--pp >= pad) | |
| 92 | putchar(*pp); | |
| 93 | ||
| 94 | putchar('.');
| |
| 95 | ||
| 96 | b = a; | |
| 97 | do {
| |
| 98 | for(i = b, c = z = 0; i < 5; i++){
| |
| 99 | u6432.u64 = (uint64_t) uv[i] * 10; | |
| 100 | uv[i] = u6432.u32[0] + c; | |
| 101 | c = u6432.u32[1]; | |
| 102 | if(i == b && uv[i] == 0) | |
| 103 | b++; | |
| 104 | z |= uv[i]; | |
| 105 | } | |
| 106 | putchar(c + '0'); | |
| 107 | } while(z); | |
| 108 | ||
| 109 | } |
