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/hal_rpi_pico-latest/src/rp2_common/pico_printf/
Dprintf.c470 } conv; in _etoa() local
472 conv.F = value; in _etoa()
474 if (conv.U) { in _etoa()
475 int exp2 = (int) ((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2 in _etoa()
476conv.U = (conv.U & ((1ULL << 52U) - 1U)) | (1023ULL << 52U); // drop the exponent so conv.F is no… in _etoa()
478 … expval = (int) (0.1760912590558 + exp2 * 0.301029995663981 + (conv.F - 1.5) * 0.289529654602168); in _etoa()
483 conv.U = (uint64_t) (exp2 + 1023) << 52U; in _etoa()
485 conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14))))); in _etoa()
487 if (value < conv.F) { in _etoa()
489 conv.F /= 10; in _etoa()
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