/* Software floating-point emulation. Common operations.
- Copyright (C) 1997,1998,1999,2006 Free Software Foundation, Inc.
+ Copyright (C) 1997,1998,1999,2006,2007,2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com),
Jakub Jelinek (jj@ultra.linux.cz),
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file into
+ combinations with other programs, and to distribute those
+ combinations without any restriction coming from the use of this
+ file. (The Lesser General Public License restrictions do apply in
+ other respects; for example, they cover modification of the file,
+ and distribution when not linked into a combine executable.)
+
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
-#define _FP_DECL(wc, X) \
- _FP_I_TYPE X##_c, X##_s, X##_e; \
+#define _FP_DECL(wc, X) \
+ _FP_I_TYPE X##_c __attribute__((unused)); \
+ _FP_I_TYPE X##_s __attribute__((unused)); \
+ _FP_I_TYPE X##_e; \
_FP_FRAC_DECL_##wc(X)
/*
} \
} while (0)
+/* Finish unpacking an fp value in semi-raw mode: the mantissa is
+ shifted by _FP_WORKBITS but the implicit MSB is not inserted and
+ other classification is not done. */
+#define _FP_UNPACK_SEMIRAW(fs, wc, X) _FP_FRAC_SLL_##wc(X, _FP_WORKBITS)
+
+/* A semi-raw value has overflowed to infinity. Adjust the mantissa
+ and exponent appropriately. */
+#define _FP_OVERFLOW_SEMIRAW(fs, wc, X) \
+do { \
+ if (FP_ROUNDMODE == FP_RND_NEAREST \
+ || (FP_ROUNDMODE == FP_RND_PINF && !X##_s) \
+ || (FP_ROUNDMODE == FP_RND_MINF && X##_s)) \
+ { \
+ X##_e = _FP_EXPMAX_##fs; \
+ _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
+ } \
+ else \
+ { \
+ X##_e = _FP_EXPMAX_##fs - 1; \
+ _FP_FRAC_SET_##wc(X, _FP_MAXFRAC_##wc); \
+ } \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
+ FP_SET_EXCEPTION(FP_EX_OVERFLOW); \
+} while (0)
+
+/* Check for a semi-raw value being a signaling NaN and raise the
+ invalid exception if so. */
+#define _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X) \
+do { \
+ if (X##_e == _FP_EXPMAX_##fs \
+ && !_FP_FRAC_ZEROP_##wc(X) \
+ && !(_FP_FRAC_HIGH_##fs(X) & _FP_QNANBIT_SH_##fs)) \
+ FP_SET_EXCEPTION(FP_EX_INVALID); \
+} while (0)
+
+/* Choose a NaN result from an operation on two semi-raw NaN
+ values. */
+#define _FP_CHOOSENAN_SEMIRAW(fs, wc, R, X, Y, OP) \
+do { \
+ /* _FP_CHOOSENAN expects raw values, so shift as required. */ \
+ _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
+ _FP_FRAC_SRL_##wc(Y, _FP_WORKBITS); \
+ _FP_CHOOSENAN(fs, wc, R, X, Y, OP); \
+ _FP_FRAC_SLL_##wc(R, _FP_WORKBITS); \
+} while (0)
+
+/* Test whether a biased exponent is normal (not zero or maximum). */
+#define _FP_EXP_NORMAL(fs, wc, X) (((X##_e + 1) & _FP_EXPMAX_##fs) > 1)
+
+/* Prepare to pack an fp value in semi-raw mode: the mantissa is
+ rounded and shifted right, with the rounding possibly increasing
+ the exponent (including changing a finite value to infinity). */
+#define _FP_PACK_SEMIRAW(fs, wc, X) \
+do { \
+ _FP_ROUND(wc, X); \
+ if (X##_e == 0 && !_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \
+ || (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \
+ FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
+ } \
+ if (_FP_FRAC_HIGH_##fs(X) \
+ & (_FP_OVERFLOW_##fs >> 1)) \
+ { \
+ _FP_FRAC_HIGH_##fs(X) &= ~(_FP_OVERFLOW_##fs >> 1); \
+ X##_e++; \
+ if (X##_e == _FP_EXPMAX_##fs) \
+ _FP_OVERFLOW_SEMIRAW(fs, wc, X); \
+ } \
+ _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
+ if (X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ if (!_FP_KEEPNANFRACP) \
+ { \
+ _FP_FRAC_SET_##wc(X, _FP_NANFRAC_##fs); \
+ X##_s = _FP_NANSIGN_##fs; \
+ } \
+ else \
+ _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_QNANBIT_##fs; \
+ } \
+} while (0)
+
/*
* Before packing the bits back into the native fp result, take care
* of such mundane things as rounding and overflow. Also, for some
{ \
X##_e = 1; \
_FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
} \
else \
{ \
X##_e = 0; \
_FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
- FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
} \
+ if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \
+ || (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \
+ FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
} \
else \
{ \
-/*
- * Main addition routine. The input values should be cooked.
- */
-
-#define _FP_ADD_INTERNAL(fs, wc, R, X, Y, OP) \
-do { \
- switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
- { \
- case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
- { \
- /* shift the smaller number so that its exponent matches the larger */ \
- _FP_I_TYPE diff = X##_e - Y##_e; \
- \
- if (diff < 0) \
- { \
- diff = -diff; \
- if (diff <= _FP_WFRACBITS_##fs) \
- _FP_FRAC_SRS_##wc(X, diff, _FP_WFRACBITS_##fs); \
- else if (!_FP_FRAC_ZEROP_##wc(X)) \
- _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
- R##_e = Y##_e; \
- } \
- else \
- { \
- if (diff > 0) \
- { \
- if (diff <= _FP_WFRACBITS_##fs) \
- _FP_FRAC_SRS_##wc(Y, diff, _FP_WFRACBITS_##fs); \
- else if (!_FP_FRAC_ZEROP_##wc(Y)) \
- _FP_FRAC_SET_##wc(Y, _FP_MINFRAC_##wc); \
- } \
- R##_e = X##_e; \
- } \
- \
- R##_c = FP_CLS_NORMAL; \
- \
- if (X##_s == Y##_s) \
- { \
- R##_s = X##_s; \
- _FP_FRAC_ADD_##wc(R, X, Y); \
- if (_FP_FRAC_OVERP_##wc(fs, R)) \
- { \
- _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_##fs); \
- R##_e++; \
- } \
- } \
- else \
- { \
- R##_s = X##_s; \
- _FP_FRAC_SUB_##wc(R, X, Y); \
- if (_FP_FRAC_ZEROP_##wc(R)) \
- { \
- /* return an exact zero */ \
- if (FP_ROUNDMODE == FP_RND_MINF) \
- R##_s |= Y##_s; \
- else \
- R##_s &= Y##_s; \
- R##_c = FP_CLS_ZERO; \
- } \
- else \
- { \
- if (_FP_FRAC_NEGP_##wc(R)) \
- { \
- _FP_FRAC_SUB_##wc(R, Y, X); \
- R##_s = Y##_s; \
- } \
- \
- /* renormalize after subtraction */ \
- _FP_FRAC_CLZ_##wc(diff, R); \
- diff -= _FP_WFRACXBITS_##fs; \
- if (diff) \
- { \
- R##_e -= diff; \
- _FP_FRAC_SLL_##wc(R, diff); \
- } \
- } \
- } \
- break; \
- } \
- \
- case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): \
- _FP_CHOOSENAN(fs, wc, R, X, Y, OP); \
- break; \
- \
- case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO): \
- R##_e = X##_e; \
- case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMAL): \
- case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): \
- case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO): \
- _FP_FRAC_COPY_##wc(R, X); \
- R##_s = X##_s; \
- R##_c = X##_c; \
- break; \
- \
- case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORMAL): \
- R##_e = Y##_e; \
- case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NAN): \
- case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): \
- case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN): \
- _FP_FRAC_COPY_##wc(R, Y); \
- R##_s = Y##_s; \
- R##_c = Y##_c; \
- break; \
- \
- case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): \
- if (X##_s != Y##_s) \
- { \
- /* +INF + -INF => NAN */ \
- _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
- R##_s = _FP_NANSIGN_##fs; \
- R##_c = FP_CLS_NAN; \
- FP_SET_EXCEPTION(FP_EX_INVALID); \
- break; \
- } \
- /* FALLTHRU */ \
- \
- case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL): \
- case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO): \
- R##_s = X##_s; \
- R##_c = FP_CLS_INF; \
- break; \
- \
- case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_INF): \
- case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF): \
- R##_s = Y##_s; \
- R##_c = FP_CLS_INF; \
- break; \
- \
- case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO): \
- /* make sure the sign is correct */ \
- if (FP_ROUNDMODE == FP_RND_MINF) \
- R##_s = X##_s | Y##_s; \
- else \
- R##_s = X##_s & Y##_s; \
- R##_c = FP_CLS_ZERO; \
- break; \
- \
- default: \
- abort(); \
- } \
+/* Addition on semi-raw values. */
+#define _FP_ADD_INTERNAL(fs, wc, R, X, Y, OP) \
+do { \
+ if (X##_s == Y##_s) \
+ { \
+ /* Addition. */ \
+ R##_s = X##_s; \
+ int ediff = X##_e - Y##_e; \
+ if (ediff > 0) \
+ { \
+ R##_e = X##_e; \
+ if (Y##_e == 0) \
+ { \
+ /* Y is zero or denormalized. */ \
+ if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto add_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ ediff--; \
+ if (ediff == 0) \
+ { \
+ _FP_FRAC_ADD_##wc(R, X, Y); \
+ goto add3; \
+ } \
+ if (X##_e == _FP_EXPMAX_##fs) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto add_done; \
+ } \
+ goto add1; \
+ } \
+ } \
+ else if (X##_e == _FP_EXPMAX_##fs) \
+ { \
+ /* X is NaN or Inf, Y is normal. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto add_done; \
+ } \
+ \
+ /* Insert implicit MSB of Y. */ \
+ _FP_FRAC_HIGH_##fs(Y) |= _FP_IMPLBIT_SH_##fs; \
+ \
+ add1: \
+ /* Shift the mantissa of Y to the right EDIFF steps; \
+ remember to account later for the implicit MSB of X. */ \
+ if (ediff <= _FP_WFRACBITS_##fs) \
+ _FP_FRAC_SRS_##wc(Y, ediff, _FP_WFRACBITS_##fs); \
+ else if (!_FP_FRAC_ZEROP_##wc(Y)) \
+ _FP_FRAC_SET_##wc(Y, _FP_MINFRAC_##wc); \
+ _FP_FRAC_ADD_##wc(R, X, Y); \
+ } \
+ else if (ediff < 0) \
+ { \
+ ediff = -ediff; \
+ R##_e = Y##_e; \
+ if (X##_e == 0) \
+ { \
+ /* X is zero or denormalized. */ \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto add_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ ediff--; \
+ if (ediff == 0) \
+ { \
+ _FP_FRAC_ADD_##wc(R, Y, X); \
+ goto add3; \
+ } \
+ if (Y##_e == _FP_EXPMAX_##fs) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto add_done; \
+ } \
+ goto add2; \
+ } \
+ } \
+ else if (Y##_e == _FP_EXPMAX_##fs) \
+ { \
+ /* Y is NaN or Inf, X is normal. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto add_done; \
+ } \
+ \
+ /* Insert implicit MSB of X. */ \
+ _FP_FRAC_HIGH_##fs(X) |= _FP_IMPLBIT_SH_##fs; \
+ \
+ add2: \
+ /* Shift the mantissa of X to the right EDIFF steps; \
+ remember to account later for the implicit MSB of Y. */ \
+ if (ediff <= _FP_WFRACBITS_##fs) \
+ _FP_FRAC_SRS_##wc(X, ediff, _FP_WFRACBITS_##fs); \
+ else if (!_FP_FRAC_ZEROP_##wc(X)) \
+ _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
+ _FP_FRAC_ADD_##wc(R, Y, X); \
+ } \
+ else \
+ { \
+ /* ediff == 0. */ \
+ if (!_FP_EXP_NORMAL(fs, wc, X)) \
+ { \
+ if (X##_e == 0) \
+ { \
+ /* X and Y are zero or denormalized. */ \
+ R##_e = 0; \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ if (!_FP_FRAC_ZEROP_##wc(Y)) \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto add_done; \
+ } \
+ else if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto add_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_ADD_##wc(R, X, Y); \
+ if (_FP_FRAC_HIGH_##fs(R) & _FP_IMPLBIT_SH_##fs) \
+ { \
+ /* Normalized result. */ \
+ _FP_FRAC_HIGH_##fs(R) \
+ &= ~(_FP_W_TYPE)_FP_IMPLBIT_SH_##fs; \
+ R##_e = 1; \
+ } \
+ goto add_done; \
+ } \
+ } \
+ else \
+ { \
+ /* X and Y are NaN or Inf. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ R##_e = _FP_EXPMAX_##fs; \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ else if (_FP_FRAC_ZEROP_##wc(Y)) \
+ _FP_FRAC_COPY_##wc(R, X); \
+ else \
+ _FP_CHOOSENAN_SEMIRAW(fs, wc, R, X, Y, OP); \
+ goto add_done; \
+ } \
+ } \
+ /* The exponents of X and Y, both normal, are equal. The \
+ implicit MSBs will always add to increase the \
+ exponent. */ \
+ _FP_FRAC_ADD_##wc(R, X, Y); \
+ R##_e = X##_e + 1; \
+ _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_##fs); \
+ if (R##_e == _FP_EXPMAX_##fs) \
+ /* Overflow to infinity (depending on rounding mode). */ \
+ _FP_OVERFLOW_SEMIRAW(fs, wc, R); \
+ goto add_done; \
+ } \
+ add3: \
+ if (_FP_FRAC_HIGH_##fs(R) & _FP_IMPLBIT_SH_##fs) \
+ { \
+ /* Overflow. */ \
+ _FP_FRAC_HIGH_##fs(R) &= ~(_FP_W_TYPE)_FP_IMPLBIT_SH_##fs; \
+ R##_e++; \
+ _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_##fs); \
+ if (R##_e == _FP_EXPMAX_##fs) \
+ /* Overflow to infinity (depending on rounding mode). */ \
+ _FP_OVERFLOW_SEMIRAW(fs, wc, R); \
+ } \
+ add_done: ; \
+ } \
+ else \
+ { \
+ /* Subtraction. */ \
+ int ediff = X##_e - Y##_e; \
+ if (ediff > 0) \
+ { \
+ R##_e = X##_e; \
+ R##_s = X##_s; \
+ if (Y##_e == 0) \
+ { \
+ /* Y is zero or denormalized. */ \
+ if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto sub_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ ediff--; \
+ if (ediff == 0) \
+ { \
+ _FP_FRAC_SUB_##wc(R, X, Y); \
+ goto sub3; \
+ } \
+ if (X##_e == _FP_EXPMAX_##fs) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto sub_done; \
+ } \
+ goto sub1; \
+ } \
+ } \
+ else if (X##_e == _FP_EXPMAX_##fs) \
+ { \
+ /* X is NaN or Inf, Y is normal. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ goto sub_done; \
+ } \
+ \
+ /* Insert implicit MSB of Y. */ \
+ _FP_FRAC_HIGH_##fs(Y) |= _FP_IMPLBIT_SH_##fs; \
+ \
+ sub1: \
+ /* Shift the mantissa of Y to the right EDIFF steps; \
+ remember to account later for the implicit MSB of X. */ \
+ if (ediff <= _FP_WFRACBITS_##fs) \
+ _FP_FRAC_SRS_##wc(Y, ediff, _FP_WFRACBITS_##fs); \
+ else if (!_FP_FRAC_ZEROP_##wc(Y)) \
+ _FP_FRAC_SET_##wc(Y, _FP_MINFRAC_##wc); \
+ _FP_FRAC_SUB_##wc(R, X, Y); \
+ } \
+ else if (ediff < 0) \
+ { \
+ ediff = -ediff; \
+ R##_e = Y##_e; \
+ R##_s = Y##_s; \
+ if (X##_e == 0) \
+ { \
+ /* X is zero or denormalized. */ \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto sub_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ ediff--; \
+ if (ediff == 0) \
+ { \
+ _FP_FRAC_SUB_##wc(R, Y, X); \
+ goto sub3; \
+ } \
+ if (Y##_e == _FP_EXPMAX_##fs) \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto sub_done; \
+ } \
+ goto sub2; \
+ } \
+ } \
+ else if (Y##_e == _FP_EXPMAX_##fs) \
+ { \
+ /* Y is NaN or Inf, X is normal. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ goto sub_done; \
+ } \
+ \
+ /* Insert implicit MSB of X. */ \
+ _FP_FRAC_HIGH_##fs(X) |= _FP_IMPLBIT_SH_##fs; \
+ \
+ sub2: \
+ /* Shift the mantissa of X to the right EDIFF steps; \
+ remember to account later for the implicit MSB of Y. */ \
+ if (ediff <= _FP_WFRACBITS_##fs) \
+ _FP_FRAC_SRS_##wc(X, ediff, _FP_WFRACBITS_##fs); \
+ else if (!_FP_FRAC_ZEROP_##wc(X)) \
+ _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
+ _FP_FRAC_SUB_##wc(R, Y, X); \
+ } \
+ else \
+ { \
+ /* ediff == 0. */ \
+ if (!_FP_EXP_NORMAL(fs, wc, X)) \
+ { \
+ if (X##_e == 0) \
+ { \
+ /* X and Y are zero or denormalized. */ \
+ R##_e = 0; \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ if (_FP_FRAC_ZEROP_##wc(Y)) \
+ R##_s = (FP_ROUNDMODE == FP_RND_MINF); \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ R##_s = Y##_s; \
+ } \
+ goto sub_done; \
+ } \
+ else if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_COPY_##wc(R, X); \
+ R##_s = X##_s; \
+ goto sub_done; \
+ } \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_SUB_##wc(R, X, Y); \
+ R##_s = X##_s; \
+ if (_FP_FRAC_HIGH_##fs(R) & _FP_IMPLBIT_SH_##fs) \
+ { \
+ /* |X| < |Y|, negate result. */ \
+ _FP_FRAC_SUB_##wc(R, Y, X); \
+ R##_s = Y##_s; \
+ } \
+ else if (_FP_FRAC_ZEROP_##wc(R)) \
+ R##_s = (FP_ROUNDMODE == FP_RND_MINF); \
+ goto sub_done; \
+ } \
+ } \
+ else \
+ { \
+ /* X and Y are NaN or Inf, of opposite signs. */ \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, X); \
+ _FP_CHECK_SIGNAN_SEMIRAW(fs, wc, Y); \
+ R##_e = _FP_EXPMAX_##fs; \
+ if (_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ /* Inf - Inf. */ \
+ R##_s = _FP_NANSIGN_##fs; \
+ _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
+ _FP_FRAC_SLL_##wc(R, _FP_WORKBITS); \
+ FP_SET_EXCEPTION(FP_EX_INVALID); \
+ } \
+ else \
+ { \
+ /* Inf - NaN. */ \
+ R##_s = Y##_s; \
+ _FP_FRAC_COPY_##wc(R, Y); \
+ } \
+ } \
+ else \
+ { \
+ if (_FP_FRAC_ZEROP_##wc(Y)) \
+ { \
+ /* NaN - Inf. */ \
+ R##_s = X##_s; \
+ _FP_FRAC_COPY_##wc(R, X); \
+ } \
+ else \
+ { \
+ /* NaN - NaN. */ \
+ _FP_CHOOSENAN_SEMIRAW(fs, wc, R, X, Y, OP); \
+ } \
+ } \
+ goto sub_done; \
+ } \
+ } \
+ /* The exponents of X and Y, both normal, are equal. The \
+ implicit MSBs cancel. */ \
+ R##_e = X##_e; \
+ _FP_FRAC_SUB_##wc(R, X, Y); \
+ R##_s = X##_s; \
+ if (_FP_FRAC_HIGH_##fs(R) & _FP_IMPLBIT_SH_##fs) \
+ { \
+ /* |X| < |Y|, negate result. */ \
+ _FP_FRAC_SUB_##wc(R, Y, X); \
+ R##_s = Y##_s; \
+ } \
+ else if (_FP_FRAC_ZEROP_##wc(R)) \
+ { \
+ R##_e = 0; \
+ R##_s = (FP_ROUNDMODE == FP_RND_MINF); \
+ goto sub_done; \
+ } \
+ goto norm; \
+ } \
+ sub3: \
+ if (_FP_FRAC_HIGH_##fs(R) & _FP_IMPLBIT_SH_##fs) \
+ { \
+ int diff; \
+ /* Carry into most significant bit of larger one of X and Y, \
+ canceling it; renormalize. */ \
+ _FP_FRAC_HIGH_##fs(R) &= _FP_IMPLBIT_SH_##fs - 1; \
+ norm: \
+ _FP_FRAC_CLZ_##wc(diff, R); \
+ diff -= _FP_WFRACXBITS_##fs; \
+ _FP_FRAC_SLL_##wc(R, diff); \
+ if (R##_e <= diff) \
+ { \
+ /* R is denormalized. */ \
+ diff = diff - R##_e + 1; \
+ _FP_FRAC_SRS_##wc(R, diff, _FP_WFRACBITS_##fs); \
+ R##_e = 0; \
+ } \
+ else \
+ { \
+ R##_e -= diff; \
+ _FP_FRAC_HIGH_##fs(R) &= ~(_FP_W_TYPE)_FP_IMPLBIT_SH_##fs; \
+ } \
+ } \
+ sub_done: ; \
+ } \
} while (0)
#define _FP_ADD(fs, wc, R, X, Y) _FP_ADD_INTERNAL(fs, wc, R, X, Y, '+')
-#define _FP_SUB(fs, wc, R, X, Y) \
- do { \
- if (Y##_c != FP_CLS_NAN) Y##_s ^= 1; \
- _FP_ADD_INTERNAL(fs, wc, R, X, Y, '-'); \
+#define _FP_SUB(fs, wc, R, X, Y) \
+ do { \
+ if (!(Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))) Y##_s ^= 1; \
+ _FP_ADD_INTERNAL(fs, wc, R, X, Y, '-'); \
} while (0)
#define _FP_MUL(fs, wc, R, X, Y) \
do { \
R##_s = X##_s ^ Y##_s; \
+ R##_e = X##_e + Y##_e + 1; \
switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
{ \
case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
R##_c = FP_CLS_NORMAL; \
- R##_e = X##_e + Y##_e + 1; \
\
_FP_MUL_MEAT_##fs(R,X,Y); \
\
#define _FP_DIV(fs, wc, R, X, Y) \
do { \
R##_s = X##_s ^ Y##_s; \
+ R##_e = X##_e - Y##_e; \
switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
{ \
case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
R##_c = FP_CLS_NORMAL; \
- R##_e = X##_e - Y##_e; \
\
_FP_DIV_MEAT_##fs(R,X,Y); \
break; \
/* Simplification for strict equality. */
-#define _FP_CMP_EQ(fs, wc, ret, X, Y) \
- do { \
- /* NANs are unordered */ \
- if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
- || (Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))) \
- { \
- ret = 1; \
- } \
- else \
- { \
- ret = !(X##_e == Y##_e \
- && _FP_FRAC_EQ_##wc(X, Y) \
- && (X##_s == Y##_s || !X##_e && _FP_FRAC_ZEROP_##wc(X))); \
- } \
+#define _FP_CMP_EQ(fs, wc, ret, X, Y) \
+ do { \
+ /* NANs are unordered */ \
+ if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
+ || (Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))) \
+ { \
+ ret = 1; \
+ } \
+ else \
+ { \
+ ret = !(X##_e == Y##_e \
+ && _FP_FRAC_EQ_##wc(X, Y) \
+ && (X##_s == Y##_s || (!X##_e && _FP_FRAC_ZEROP_##wc(X)))); \
+ } \
+ } while (0)
+
+/* Version to test unordered. */
+
+#define _FP_CMP_UNORD(fs, wc, ret, X, Y) \
+ do { \
+ ret = ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
+ || (Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))); \
} while (0)
/*
} while (0)
/*
- * Convert from FP to integer
+ * Convert from FP to integer. Input is raw.
*/
/* RSIGNED can have following values:
* 0: the number is required to be 0..(2^rsize)-1, if not, NV is set plus
- * the result is either 0 or (2^rsize)-1 depending on the sign in such case.
- * 1: the number is required to be -(2^(rsize-1))..(2^(rsize-1))-1, if not, NV is
- * set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1 depending
- * on the sign in such case.
+ * the result is either 0 or (2^rsize)-1 depending on the sign in such
+ * case.
+ * 1: the number is required to be -(2^(rsize-1))..(2^(rsize-1))-1, if not,
+ * NV is set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1
+ * depending on the sign in such case.
* -1: the number is required to be -(2^(rsize-1))..(2^rsize)-1, if not, NV is
- * set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1 depending
- * on the sign in such case.
+ * set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1
+ * depending on the sign in such case.
*/
-#define _FP_TO_INT(fs, wc, r, X, rsize, rsigned) \
- do { \
- switch (X##_c) \
- { \
- case FP_CLS_NORMAL: \
- if (X##_e < 0) \
- { \
- FP_SET_EXCEPTION(FP_EX_INEXACT); \
- case FP_CLS_ZERO: \
- r = 0; \
- } \
- else if (X##_e >= rsize - (rsigned > 0 || X##_s) \
- || (!rsigned && X##_s)) \
- { /* overflow */ \
- case FP_CLS_NAN: \
- case FP_CLS_INF: \
- if (rsigned) \
- { \
- r = 1; \
- r <<= rsize - 1; \
- r -= 1 - X##_s; \
- } else { \
- r = 0; \
- if (X##_s) \
- r = ~r; \
- } \
- FP_SET_EXCEPTION(FP_EX_INVALID); \
- } \
- else \
- { \
- if (_FP_W_TYPE_SIZE*wc < rsize) \
- { \
- _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
- r <<= X##_e - _FP_WFRACBITS_##fs; \
- } \
- else \
- { \
- if (X##_e >= _FP_WFRACBITS_##fs) \
- _FP_FRAC_SLL_##wc(X, (X##_e - _FP_WFRACBITS_##fs + 1)); \
- else if (X##_e < _FP_WFRACBITS_##fs - 1) \
- { \
- _FP_FRAC_SRS_##wc(X, (_FP_WFRACBITS_##fs - X##_e - 2), \
- _FP_WFRACBITS_##fs); \
- if (_FP_FRAC_LOW_##wc(X) & 1) \
- FP_SET_EXCEPTION(FP_EX_INEXACT); \
- _FP_FRAC_SRL_##wc(X, 1); \
- } \
- _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
- } \
- if (rsigned && X##_s) \
- r = -r; \
- } \
- break; \
- } \
- } while (0)
-
-#define _FP_FROM_INT(fs, wc, X, r, rsize, rtype) \
- do { \
- if (r) \
- { \
- unsigned rtype ur_; \
- X##_c = FP_CLS_NORMAL; \
- \
- if ((X##_s = (r < 0))) \
- r = -r; \
- \
- ur_ = (unsigned rtype) r; \
- if (rsize <= _FP_W_TYPE_SIZE) \
- __FP_CLZ(X##_e, ur_); \
- else \
- __FP_CLZ_2(X##_e, (_FP_W_TYPE)(ur_ >> _FP_W_TYPE_SIZE), \
- (_FP_W_TYPE)ur_); \
- if (rsize < _FP_W_TYPE_SIZE) \
- X##_e -= (_FP_W_TYPE_SIZE - rsize); \
- X##_e = rsize - X##_e - 1; \
+#define _FP_TO_INT(fs, wc, r, X, rsize, rsigned) \
+do { \
+ if (X##_e < _FP_EXPBIAS_##fs) \
+ { \
+ r = 0; \
+ if (X##_e == 0) \
+ { \
+ if (!_FP_FRAC_ZEROP_##wc(X)) \
+ { \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ } \
+ } \
+ else \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
+ } \
+ else if (X##_e >= _FP_EXPBIAS_##fs + rsize - (rsigned > 0 || X##_s) \
+ || (!rsigned && X##_s)) \
+ { \
+ /* Overflow or converting to the most negative integer. */ \
+ if (rsigned) \
+ { \
+ r = 1; \
+ r <<= rsize - 1; \
+ r -= 1 - X##_s; \
+ } else { \
+ r = 0; \
+ if (X##_s) \
+ r = ~r; \
+ } \
\
- if (_FP_FRACBITS_##fs < rsize && _FP_WFRACBITS_##fs < X##_e) \
- __FP_FRAC_SRS_1(ur_, (X##_e - _FP_WFRACBITS_##fs + 1), rsize);\
- _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsize); \
- if ((_FP_WFRACBITS_##fs - X##_e - 1) > 0) \
- _FP_FRAC_SLL_##wc(X, (_FP_WFRACBITS_##fs - X##_e - 1)); \
- } \
- else \
- { \
- X##_c = FP_CLS_ZERO, X##_s = 0; \
- } \
+ if (rsigned && X##_s && X##_e == _FP_EXPBIAS_##fs + rsize - 1) \
+ { \
+ /* Possibly converting to most negative integer; check the \
+ mantissa. */ \
+ int inexact = 0; \
+ (void)((_FP_FRACBITS_##fs > rsize) \
+ ? ({ _FP_FRAC_SRST_##wc(X, inexact, \
+ _FP_FRACBITS_##fs - rsize, \
+ _FP_FRACBITS_##fs); 0; }) \
+ : 0); \
+ if (!_FP_FRAC_ZEROP_##wc(X)) \
+ FP_SET_EXCEPTION(FP_EX_INVALID); \
+ else if (inexact) \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
+ } \
+ else \
+ FP_SET_EXCEPTION(FP_EX_INVALID); \
+ } \
+ else \
+ { \
+ _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_IMPLBIT_##fs; \
+ if (X##_e >= _FP_EXPBIAS_##fs + _FP_FRACBITS_##fs - 1) \
+ { \
+ _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
+ r <<= X##_e - _FP_EXPBIAS_##fs - _FP_FRACBITS_##fs + 1; \
+ } \
+ else \
+ { \
+ int inexact; \
+ _FP_FRAC_SRST_##wc(X, inexact, \
+ (_FP_FRACBITS_##fs + _FP_EXPBIAS_##fs - 1 \
+ - X##_e), \
+ _FP_FRACBITS_##fs); \
+ if (inexact) \
+ FP_SET_EXCEPTION(FP_EX_INEXACT); \
+ _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
+ } \
+ if (rsigned && X##_s) \
+ r = -r; \
+ } \
+} while (0)
+
+/* Convert integer to fp. Output is raw. RTYPE is unsigned even if
+ input is signed. */
+#define _FP_FROM_INT(fs, wc, X, r, rsize, rtype) \
+ do { \
+ if (r) \
+ { \
+ rtype ur_; \
+ \
+ if ((X##_s = (r < 0))) \
+ r = -(rtype)r; \
+ \
+ ur_ = (rtype) r; \
+ (void)((rsize <= _FP_W_TYPE_SIZE) \
+ ? ({ \
+ int lz_; \
+ __FP_CLZ(lz_, (_FP_W_TYPE)ur_); \
+ X##_e = _FP_EXPBIAS_##fs + _FP_W_TYPE_SIZE - 1 - lz_; \
+ }) \
+ : ((rsize <= 2 * _FP_W_TYPE_SIZE) \
+ ? ({ \
+ int lz_; \
+ __FP_CLZ_2(lz_, (_FP_W_TYPE)(ur_ >> _FP_W_TYPE_SIZE), \
+ (_FP_W_TYPE)ur_); \
+ X##_e = (_FP_EXPBIAS_##fs + 2 * _FP_W_TYPE_SIZE - 1 \
+ - lz_); \
+ }) \
+ : (abort(), 0))); \
+ \
+ if (rsize - 1 + _FP_EXPBIAS_##fs >= _FP_EXPMAX_##fs \
+ && X##_e >= _FP_EXPMAX_##fs) \
+ { \
+ /* Exponent too big; overflow to infinity. (May also \
+ happen after rounding below.) */ \
+ _FP_OVERFLOW_SEMIRAW(fs, wc, X); \
+ goto pack_semiraw; \
+ } \
+ \
+ if (rsize <= _FP_FRACBITS_##fs \
+ || X##_e < _FP_EXPBIAS_##fs + _FP_FRACBITS_##fs) \
+ { \
+ /* Exactly representable; shift left. */ \
+ _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsize); \
+ _FP_FRAC_SLL_##wc(X, (_FP_EXPBIAS_##fs \
+ + _FP_FRACBITS_##fs - 1 - X##_e)); \
+ } \
+ else \
+ { \
+ /* More bits in integer than in floating type; need to \
+ round. */ \
+ if (_FP_EXPBIAS_##fs + _FP_WFRACBITS_##fs - 1 < X##_e) \
+ ur_ = ((ur_ >> (X##_e - _FP_EXPBIAS_##fs \
+ - _FP_WFRACBITS_##fs + 1)) \
+ | ((ur_ << (rsize - (X##_e - _FP_EXPBIAS_##fs \
+ - _FP_WFRACBITS_##fs + 1))) \
+ != 0)); \
+ _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsize); \
+ if ((_FP_EXPBIAS_##fs + _FP_WFRACBITS_##fs - 1 - X##_e) > 0) \
+ _FP_FRAC_SLL_##wc(X, (_FP_EXPBIAS_##fs \
+ + _FP_WFRACBITS_##fs - 1 - X##_e)); \
+ _FP_FRAC_HIGH_##fs(X) &= ~(_FP_W_TYPE)_FP_IMPLBIT_SH_##fs; \
+ pack_semiraw: \
+ _FP_PACK_SEMIRAW(fs, wc, X); \
+ } \
+ } \
+ else \
+ { \
+ X##_s = 0; \
+ X##_e = 0; \
+ _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
+ } \
} while (0)
-#define FP_CONV(dfs,sfs,dwc,swc,D,S) \
- do { \
- _FP_FRAC_CONV_##dwc##_##swc(dfs, sfs, D, S); \
- D##_e = S##_e; \
- D##_c = S##_c; \
- D##_s = S##_s; \
- } while (0)
+/* Extend from a narrower floating-point format to a wider one. Input
+ and output are raw. */
+#define FP_EXTEND(dfs,sfs,dwc,swc,D,S) \
+do { \
+ if (_FP_FRACBITS_##dfs < _FP_FRACBITS_##sfs \
+ || (_FP_EXPMAX_##dfs - _FP_EXPBIAS_##dfs \
+ < _FP_EXPMAX_##sfs - _FP_EXPBIAS_##sfs) \
+ || (_FP_EXPBIAS_##dfs < _FP_EXPBIAS_##sfs + _FP_FRACBITS_##sfs - 1 \
+ && _FP_EXPBIAS_##dfs != _FP_EXPBIAS_##sfs)) \
+ abort(); \
+ D##_s = S##_s; \
+ _FP_FRAC_COPY_##dwc##_##swc(D, S); \
+ if (_FP_EXP_NORMAL(sfs, swc, S)) \
+ { \
+ D##_e = S##_e + _FP_EXPBIAS_##dfs - _FP_EXPBIAS_##sfs; \
+ _FP_FRAC_SLL_##dwc(D, (_FP_FRACBITS_##dfs - _FP_FRACBITS_##sfs)); \
+ } \
+ else \
+ { \
+ if (S##_e == 0) \
+ { \
+ if (_FP_FRAC_ZEROP_##swc(S)) \
+ D##_e = 0; \
+ else if (_FP_EXPBIAS_##dfs \
+ < _FP_EXPBIAS_##sfs + _FP_FRACBITS_##sfs - 1) \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_SLL_##dwc(D, (_FP_FRACBITS_##dfs \
+ - _FP_FRACBITS_##sfs)); \
+ D##_e = 0; \
+ } \
+ else \
+ { \
+ int _lz; \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ _FP_FRAC_CLZ_##swc(_lz, S); \
+ _FP_FRAC_SLL_##dwc(D, \
+ _lz + _FP_FRACBITS_##dfs \
+ - _FP_FRACTBITS_##sfs); \
+ D##_e = (_FP_EXPBIAS_##dfs - _FP_EXPBIAS_##sfs + 1 \
+ + _FP_FRACXBITS_##sfs - _lz); \
+ } \
+ } \
+ else \
+ { \
+ D##_e = _FP_EXPMAX_##dfs; \
+ if (!_FP_FRAC_ZEROP_##swc(S)) \
+ { \
+ if (!(_FP_FRAC_HIGH_RAW_##sfs(S) & _FP_QNANBIT_##sfs)) \
+ FP_SET_EXCEPTION(FP_EX_INVALID); \
+ _FP_FRAC_SLL_##dwc(D, (_FP_FRACBITS_##dfs \
+ - _FP_FRACBITS_##sfs)); \
+ } \
+ } \
+ } \
+} while (0)
+
+/* Truncate from a wider floating-point format to a narrower one.
+ Input and output are semi-raw. */
+#define FP_TRUNC(dfs,sfs,dwc,swc,D,S) \
+do { \
+ if (_FP_FRACBITS_##sfs < _FP_FRACBITS_##dfs \
+ || (_FP_EXPBIAS_##sfs < _FP_EXPBIAS_##dfs + _FP_FRACBITS_##dfs - 1 \
+ && _FP_EXPBIAS_##sfs != _FP_EXPBIAS_##dfs)) \
+ abort(); \
+ D##_s = S##_s; \
+ if (_FP_EXP_NORMAL(sfs, swc, S)) \
+ { \
+ D##_e = S##_e + _FP_EXPBIAS_##dfs - _FP_EXPBIAS_##sfs; \
+ if (D##_e >= _FP_EXPMAX_##dfs) \
+ _FP_OVERFLOW_SEMIRAW(dfs, dwc, D); \
+ else \
+ { \
+ if (D##_e <= 0) \
+ { \
+ if (D##_e < 1 - _FP_FRACBITS_##dfs) \
+ { \
+ _FP_FRAC_SET_##swc(S, _FP_ZEROFRAC_##swc); \
+ _FP_FRAC_LOW_##swc(S) |= 1; \
+ } \
+ else \
+ { \
+ _FP_FRAC_HIGH_##sfs(S) |= _FP_IMPLBIT_SH_##sfs; \
+ _FP_FRAC_SRS_##swc(S, (_FP_WFRACBITS_##sfs \
+ - _FP_WFRACBITS_##dfs + 1 - D##_e), \
+ _FP_WFRACBITS_##sfs); \
+ } \
+ D##_e = 0; \
+ } \
+ else \
+ _FP_FRAC_SRS_##swc(S, (_FP_WFRACBITS_##sfs \
+ - _FP_WFRACBITS_##dfs), \
+ _FP_WFRACBITS_##sfs); \
+ _FP_FRAC_COPY_##dwc##_##swc(D, S); \
+ } \
+ } \
+ else \
+ { \
+ if (S##_e == 0) \
+ { \
+ D##_e = 0; \
+ if (_FP_FRAC_ZEROP_##swc(S)) \
+ _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \
+ else \
+ { \
+ FP_SET_EXCEPTION(FP_EX_DENORM); \
+ if (_FP_EXPBIAS_##sfs \
+ < _FP_EXPBIAS_##dfs + _FP_FRACBITS_##dfs - 1) \
+ { \
+ _FP_FRAC_SRS_##swc(S, (_FP_WFRACBITS_##sfs \
+ - _FP_WFRACBITS_##dfs), \
+ _FP_WFRACBITS_##sfs); \
+ _FP_FRAC_COPY_##dwc##_##swc(D, S); \
+ } \
+ else \
+ { \
+ _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \
+ _FP_FRAC_LOW_##dwc(D) |= 1; \
+ } \
+ } \
+ } \
+ else \
+ { \
+ D##_e = _FP_EXPMAX_##dfs; \
+ if (_FP_FRAC_ZEROP_##swc(S)) \
+ _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \
+ else \
+ { \
+ _FP_CHECK_SIGNAN_SEMIRAW(sfs, swc, S); \
+ _FP_FRAC_SRL_##swc(S, (_FP_WFRACBITS_##sfs \
+ - _FP_WFRACBITS_##dfs)); \
+ _FP_FRAC_COPY_##dwc##_##swc(D, S); \
+ /* Semi-raw NaN must have all workbits cleared. */ \
+ _FP_FRAC_LOW_##dwc(D) \
+ &= ~(_FP_W_TYPE) ((1 << _FP_WORKBITS) - 1); \
+ _FP_FRAC_HIGH_##dfs(D) |= _FP_QNANBIT_SH_##dfs; \
+ } \
+ } \
+ } \
+} while (0)
/*
* Helper primitives.
projects / thirdparty / glibc.git / blobdiff