--- _hdtoa.c.orig 2006-01-31 15:21:41.000000000 -0800 +++ _hdtoa.c 2006-01-31 23:37:12.000000000 -0800 @@ -223,6 +223,10 @@ union IEEEl2bits u; char *s, *s0; int bufsize; +#ifdef LDBL_HEAD_TAIL_PAIR + uint32_t bits[4]; + int i, pos; +#endif /* LDBL_HEAD_TAIL_PAIR */ u.e = e; *sign = u.bits.sign; @@ -270,6 +274,19 @@ */ for (s = s0 + bufsize - 1; s > s0 + sigfigs - 1; s--) *s = 0; +#ifdef LDBL_HEAD_TAIL_PAIR + _ldbl2array32dd(u, bits); + i = 0; + pos = 8; + for (; s > s0; s--) { + *s = bits[i] & 0xf; + bits[i] >>= 4; + if (--pos <= 0) { + i++; + pos = 8; + } + } +#else /* LDBL_HEAD_TAIL_PAIR */ for (; s > s0 + sigfigs - (LDBL_MANL_SIZE / 4) - 1 && s > s0; s--) { *s = u.bits.manl & 0xf; u.bits.manl >>= 4; @@ -278,6 +295,7 @@ *s = u.bits.manh & 0xf; u.bits.manh >>= 4; } +#endif /* LDBL_HEAD_TAIL_PAIR */ /* * At this point, we have snarfed all the bits in the @@ -285,7 +303,11 @@ * (partial) nibble, which is dealt with by the next * statement. We also tack on the implicit normalization bit. */ +#ifdef LDBL_HEAD_TAIL_PAIR + *s = bits[i]; +#else /* LDBL_HEAD_TAIL_PAIR */ *s = u.bits.manh | (1U << ((LDBL_MANT_DIG - 1) % 4)); +#endif /* LDBL_HEAD_TAIL_PAIR */ /* If ndigits < 0, we are expected to auto-size the precision. */ if (ndigits < 0) {