| 1 | /* _ufix64toa_r: convert unsigned 64-bit fixed point to ASCII string. |
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| 2 | * |
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| 3 | * This routine converts an unsigned fixed-point number to long double format and |
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| 4 | * then calls _ldtoa_r to do the conversion. |
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| 5 | * |
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| 6 | * Written by Jeff Johnston. |
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| 7 | */ |
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| 8 | |
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| 9 | #ifdef __SPE__ |
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| 10 | |
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| 11 | #include <_ansi.h> |
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| 12 | #include <limits.h> |
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| 13 | #include <errno.h> |
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| 14 | #include <stdlib.h> |
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| 15 | #include <reent.h> |
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| 16 | #include "fix64.h" |
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| 17 | |
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| 18 | extern char *_simdldtoa_r (struct _reent *, LONG_DOUBLE_UNION *, int, |
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| 19 | int, int *, int *, char **); |
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| 20 | |
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| 21 | /* |
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| 22 | * Convert an unsigned fixed-point 64-bit value to string. |
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| 23 | * |
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| 24 | * Ignores `locale' stuff. |
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| 25 | */ |
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| 26 | |
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| 27 | char * |
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| 28 | _ufix64toa_r (struct _reent *rptr, |
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| 29 | __uint64_t value, |
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| 30 | int mode, |
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| 31 | int ndigits, |
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| 32 | int *decpt, |
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| 33 | int *sign, |
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| 34 | char **rve) |
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| 35 | { |
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| 36 | union long_double_union ldbl; |
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| 37 | union fix64_union fix64; |
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| 38 | unsigned long tmp; |
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| 39 | int exp, negexp; |
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| 40 | |
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| 41 | /* if input is 0, no additional work is needed */ |
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| 42 | if (value == 0) |
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| 43 | { |
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| 44 | ldbl.i[0] = ldbl.i[1] = ldbl.i[2] = ldbl.i[3] = 0; |
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| 45 | } |
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| 46 | else /* otherwise, we calculate long double equivalent of value */ |
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| 47 | { |
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| 48 | /* find exponent by locating most-significant one-bit */ |
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| 49 | fix64.ll = value; |
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| 50 | negexp = 1; |
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| 51 | if (hiword(fix64) == 0) |
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| 52 | { |
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| 53 | tmp = loword(fix64); |
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| 54 | negexp = 33; |
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| 55 | } |
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| 56 | else |
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| 57 | { |
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| 58 | tmp = hiword(fix64); |
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| 59 | negexp = 1; |
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| 60 | } |
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| 61 | |
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| 62 | while (negexp < 65) |
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| 63 | { |
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| 64 | if (tmp & 0x80000000) |
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| 65 | break; |
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| 66 | ++negexp; |
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| 67 | tmp <<= 1; |
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| 68 | } |
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| 69 | |
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| 70 | /* shift input appropriately */ |
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| 71 | fix64.ll = value << (negexp - 1 + (Exp_msk1 != 0)); |
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| 72 | |
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| 73 | /* build long double */ |
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| 74 | exp = -negexp + Bias; |
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| 75 | word0(ldbl) = (exp << Exp_shift); |
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| 76 | word1(ldbl) = hiword(fix64) << (32-Ebits-1); |
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| 77 | word2(ldbl) = loword(fix64) << (32-Ebits-1); |
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| 78 | word3(ldbl) = 0; |
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| 79 | if (Ebits+1 < 32) |
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| 80 | { |
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| 81 | word0(ldbl) |= hiword(fix64) >> (Ebits + 1); |
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| 82 | word1(ldbl) |= loword(fix64) >> (Ebits + 1); |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | /* convert long double to character */ |
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| 87 | return _simdldtoa_r (rptr, &ldbl, mode, ndigits, decpt, sign, rve); |
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| 88 | } |
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| 89 | |
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| 90 | #endif /* __SPE__ */ |
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