soft-fp: Properly check _FP_W_TYPE_SIZE [BZ #24066]

quad.h have

 #if _FP_W_TYPE_SIZE < 64

union _FP_UNION_Q
{
  Use 4 _FP_W_TYPEs
}

 #else

union _FP_UNION_Q
{
  Use 2 _FP_W_TYPEs
}

 #endif

Replace

 #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q

with

 #if _FP_W_TYPE_SIZE < 64

to check whether 4 or 2 _FP_W_TYPEs are used for IEEE quad precision.
Tested with build-many-glibcs.py.

	[BZ #24066]
	* soft-fp/extenddftf2.c: Use "_FP_W_TYPE_SIZE < 64" to check if
	4_FP_W_TYPEs are used for IEEE quad precision.
	* soft-fp/extendhftf2.c: Likewise.
	* soft-fp/extendsftf2.c: Likewise.
	* soft-fp/extendxftf2.c: Likewise.
	* soft-fp/trunctfdf2.c: Likewise.
	* soft-fp/trunctfhf2.c: Likewise.
	* soft-fp/trunctfsf2.c: Likewise.
	* soft-fp/trunctfxf2.c: Likewise.
	* sysdeps/alpha/ots_cvttx.c: Likewise.
	* sysdeps/alpha/ots_cvtxt.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_daddl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_ddivl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_dmull.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_dsubl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_faddl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fdivl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fmull.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fsubl.c: Likewise.
	* sysdeps/sparc/sparc32/q_dtoq.c: Likewise.
	* sysdeps/sparc/sparc32/q_qtod.c: Likewise.
	* sysdeps/sparc/sparc32/q_qtos.c: Likewise.
	* sysdeps/sparc/sparc32/q_stoq.c: Likewise.
	* sysdeps/sparc/sparc64/qp_dtoq.c: Likewise.
	* sysdeps/sparc/sparc64/qp_qtod.c: Likewise.
	* sysdeps/sparc/sparc64/qp_qtos.c: Likewise.
	* sysdeps/sparc/sparc64/qp_stoq.c: Likewise.

27 files changed, 57 insertions, 26 deletions

diff --git a/ChangeLog b/ChangeLog
index 314a511..909e56a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,34 @@
+2019-01-07  H.J. Lu  <hongjiu.lu@intel.com>
+
+	[BZ #24066]
+	* soft-fp/extenddftf2.c: Use "_FP_W_TYPE_SIZE < 64" to check if
+	4_FP_W_TYPEs are used for IEEE quad precision.
+	* soft-fp/extendhftf2.c: Likewise.
+	* soft-fp/extendsftf2.c: Likewise.
+	* soft-fp/extendxftf2.c: Likewise.
+	* soft-fp/trunctfdf2.c: Likewise.
+	* soft-fp/trunctfhf2.c: Likewise.
+	* soft-fp/trunctfsf2.c: Likewise.
+	* soft-fp/trunctfxf2.c: Likewise.
+	* sysdeps/alpha/ots_cvttx.c: Likewise.
+	* sysdeps/alpha/ots_cvtxt.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_daddl.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_ddivl.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_dmull.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_dsubl.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_faddl.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_fdivl.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_fmull.c: Likewise.
+	* sysdeps/ieee754/soft-fp/s_fsubl.c: Likewise.
+	* sysdeps/sparc/sparc32/q_dtoq.c: Likewise.
+	* sysdeps/sparc/sparc32/q_qtod.c: Likewise.
+	* sysdeps/sparc/sparc32/q_qtos.c: Likewise.
+	* sysdeps/sparc/sparc32/q_stoq.c: Likewise.
+	* sysdeps/sparc/sparc64/qp_dtoq.c: Likewise.
+	* sysdeps/sparc/sparc64/qp_qtod.c: Likewise.
+	* sysdeps/sparc/sparc64/qp_qtos.c: Likewise.
+	* sysdeps/sparc/sparc64/qp_stoq.c: Likewise.
+
 2019-01-07  Aurelien Jarno  <aurelien@aurel32.net>
 
 	[BZ #24024]
diff --git a/soft-fp/extenddftf2.c b/soft-fp/extenddftf2.c
index 85a17ce..0568ddf 100644
--- a/soft-fp/extenddftf2.c
+++ b/soft-fp/extenddftf2.c
@@ -43,7 +43,7 @@ __extenddftf2 (DFtype a)
 
   FP_INIT_EXCEPTIONS;
   FP_UNPACK_RAW_D (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND (Q, D, 4, 2, R, A);
 #else
   FP_EXTEND (Q, D, 2, 1, R, A);
diff --git a/soft-fp/extendhftf2.c b/soft-fp/extendhftf2.c
index ed19f0d..c71ab53 100644
--- a/soft-fp/extendhftf2.c
+++ b/soft-fp/extendhftf2.c
@@ -41,7 +41,7 @@ __extendhftf2 (HFtype a)
 
   FP_INIT_EXCEPTIONS;
   FP_UNPACK_RAW_H (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND (Q, H, 4, 1, R, A);
 #else
   FP_EXTEND (Q, H, 2, 1, R, A);
diff --git a/soft-fp/extendsftf2.c b/soft-fp/extendsftf2.c
index 4707c40..82b5d62 100644
--- a/soft-fp/extendsftf2.c
+++ b/soft-fp/extendsftf2.c
@@ -43,7 +43,7 @@ __extendsftf2 (SFtype a)
 
   FP_INIT_EXCEPTIONS;
   FP_UNPACK_RAW_S (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND (Q, S, 4, 1, R, A);
 #else
   FP_EXTEND (Q, S, 2, 1, R, A);
diff --git a/soft-fp/extendxftf2.c b/soft-fp/extendxftf2.c
index 858e122..d9885e5 100644
--- a/soft-fp/extendxftf2.c
+++ b/soft-fp/extendxftf2.c
@@ -41,7 +41,7 @@ __extendxftf2 (XFtype a)
 
   FP_INIT_TRAPPING_EXCEPTIONS;
   FP_UNPACK_RAW_E (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND (Q, E, 4, 4, R, A);
 #else
   FP_EXTEND (Q, E, 2, 2, R, A);
diff --git a/soft-fp/trunctfdf2.c b/soft-fp/trunctfdf2.c
index 440ccfa..f62d541 100644
--- a/soft-fp/trunctfdf2.c
+++ b/soft-fp/trunctfdf2.c
@@ -42,7 +42,7 @@ __trunctfdf2 (TFtype a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (D, Q, 2, 4, R, A);
 #else
   FP_TRUNC (D, Q, 1, 2, R, A);
diff --git a/soft-fp/trunctfhf2.c b/soft-fp/trunctfhf2.c
index 6ee80c5..61d08f8 100644
--- a/soft-fp/trunctfhf2.c
+++ b/soft-fp/trunctfhf2.c
@@ -40,7 +40,7 @@ __trunctfhf2 (TFtype a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (H, Q, 1, 4, R, A);
 #else
   FP_TRUNC (H, Q, 1, 2, R, A);
diff --git a/soft-fp/trunctfsf2.c b/soft-fp/trunctfsf2.c
index 8b2f23d..965e1c4 100644
--- a/soft-fp/trunctfsf2.c
+++ b/soft-fp/trunctfsf2.c
@@ -42,7 +42,7 @@ __trunctfsf2 (TFtype a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (S, Q, 1, 4, R, A);
 #else
   FP_TRUNC (S, Q, 1, 2, R, A);
diff --git a/soft-fp/trunctfxf2.c b/soft-fp/trunctfxf2.c
index bcb8e88..0d828fa 100644
--- a/soft-fp/trunctfxf2.c
+++ b/soft-fp/trunctfxf2.c
@@ -41,7 +41,7 @@ __trunctfxf2 (TFtype a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q (A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (E, Q, 4, 4, R, A);
 #else
   FP_TRUNC (E, Q, 2, 2, R, A);
diff --git a/sysdeps/alpha/ots_cvttx.c b/sysdeps/alpha/ots_cvttx.c
index a2a570c..716e45a 100644
--- a/sysdeps/alpha/ots_cvttx.c
+++ b/sysdeps/alpha/ots_cvttx.c
@@ -35,7 +35,7 @@ _OtsConvertFloatTX(double a)
   AXP_DECL_RETURN_Q(c);
 
   FP_UNPACK_RAW_D(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND(Q,D,4,2,C,A);
 #else
   FP_EXTEND(Q,D,2,1,C,A);
diff --git a/sysdeps/alpha/ots_cvtxt.c b/sysdeps/alpha/ots_cvtxt.c
index 7371428..856b213 100644
--- a/sysdeps/alpha/ots_cvtxt.c
+++ b/sysdeps/alpha/ots_cvtxt.c
@@ -31,7 +31,7 @@ _OtsConvertFloatXT (long al, long ah, long _round)
 
   FP_INIT_ROUNDMODE;
   AXP_UNPACK_SEMIRAW_Q(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC(D,Q,2,4,R,A);
 #else
   FP_TRUNC(D,Q,1,2,R,A);
diff --git a/sysdeps/ieee754/soft-fp/s_daddl.c b/sysdeps/ieee754/soft-fp/s_daddl.c
index 7f217a8..dc909a1 100644
--- a/sysdeps/ieee754/soft-fp/s_daddl.c
+++ b/sysdeps/ieee754/soft-fp/s_daddl.c
@@ -46,7 +46,7 @@ __daddl (_Float128 x, _Float128 y)
   FP_UNPACK_SEMIRAW_Q (X, x);
   FP_UNPACK_SEMIRAW_Q (Y, y);
   FP_ADD_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (D, Q, 2, 4, RN, R);
 #else
   FP_TRUNC (D, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_ddivl.c b/sysdeps/ieee754/soft-fp/s_ddivl.c
index d792b70..8e469c5 100644
--- a/sysdeps/ieee754/soft-fp/s_ddivl.c
+++ b/sysdeps/ieee754/soft-fp/s_ddivl.c
@@ -46,7 +46,7 @@ __ddivl (_Float128 x, _Float128 y)
   FP_UNPACK_Q (X, x);
   FP_UNPACK_Q (Y, y);
   FP_DIV_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC_COOKED (D, Q, 2, 4, RN, R);
 #else
   FP_TRUNC_COOKED (D, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_dmull.c b/sysdeps/ieee754/soft-fp/s_dmull.c
index 9841f81..437c55b 100644
--- a/sysdeps/ieee754/soft-fp/s_dmull.c
+++ b/sysdeps/ieee754/soft-fp/s_dmull.c
@@ -46,7 +46,7 @@ __dmull (_Float128 x, _Float128 y)
   FP_UNPACK_Q (X, x);
   FP_UNPACK_Q (Y, y);
   FP_MUL_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC_COOKED (D, Q, 2, 4, RN, R);
 #else
   FP_TRUNC_COOKED (D, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_dsubl.c b/sysdeps/ieee754/soft-fp/s_dsubl.c
index 14cc769..699ff44 100644
--- a/sysdeps/ieee754/soft-fp/s_dsubl.c
+++ b/sysdeps/ieee754/soft-fp/s_dsubl.c
@@ -46,7 +46,7 @@ __dsubl (_Float128 x, _Float128 y)
   FP_UNPACK_SEMIRAW_Q (X, x);
   FP_UNPACK_SEMIRAW_Q (Y, y);
   FP_SUB_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (D, Q, 2, 4, RN, R);
 #else
   FP_TRUNC (D, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_faddl.c b/sysdeps/ieee754/soft-fp/s_faddl.c
index 4b16984..23dfcc0 100644
--- a/sysdeps/ieee754/soft-fp/s_faddl.c
+++ b/sysdeps/ieee754/soft-fp/s_faddl.c
@@ -42,7 +42,7 @@ __faddl (_Float128 x, _Float128 y)
   FP_UNPACK_SEMIRAW_Q (X, x);
   FP_UNPACK_SEMIRAW_Q (Y, y);
   FP_ADD_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (S, Q, 1, 4, RN, R);
 #else
   FP_TRUNC (S, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_fdivl.c b/sysdeps/ieee754/soft-fp/s_fdivl.c
index df7a017..4792b23 100644
--- a/sysdeps/ieee754/soft-fp/s_fdivl.c
+++ b/sysdeps/ieee754/soft-fp/s_fdivl.c
@@ -42,7 +42,7 @@ __fdivl (_Float128 x, _Float128 y)
   FP_UNPACK_Q (X, x);
   FP_UNPACK_Q (Y, y);
   FP_DIV_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC_COOKED (S, Q, 1, 4, RN, R);
 #else
   FP_TRUNC_COOKED (S, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_fmull.c b/sysdeps/ieee754/soft-fp/s_fmull.c
index 1ae0e1a..8d98bf9 100644
--- a/sysdeps/ieee754/soft-fp/s_fmull.c
+++ b/sysdeps/ieee754/soft-fp/s_fmull.c
@@ -42,7 +42,7 @@ __fmull (_Float128 x, _Float128 y)
   FP_UNPACK_Q (X, x);
   FP_UNPACK_Q (Y, y);
   FP_MUL_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC_COOKED (S, Q, 1, 4, RN, R);
 #else
   FP_TRUNC_COOKED (S, Q, 1, 2, RN, R);
diff --git a/sysdeps/ieee754/soft-fp/s_fsubl.c b/sysdeps/ieee754/soft-fp/s_fsubl.c
index bafc820..bca0060 100644
--- a/sysdeps/ieee754/soft-fp/s_fsubl.c
+++ b/sysdeps/ieee754/soft-fp/s_fsubl.c
@@ -42,7 +42,7 @@ __fsubl (_Float128 x, _Float128 y)
   FP_UNPACK_SEMIRAW_Q (X, x);
   FP_UNPACK_SEMIRAW_Q (Y, y);
   FP_SUB_Q (R, X, Y);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC (S, Q, 1, 4, RN, R);
 #else
   FP_TRUNC (S, Q, 1, 2, RN, R);
diff --git a/sysdeps/sparc/sparc32/q_dtoq.c b/sysdeps/sparc/sparc32/q_dtoq.c
index 4fa5eb7..53f833d 100644
--- a/sysdeps/sparc/sparc32/q_dtoq.c
+++ b/sysdeps/sparc/sparc32/q_dtoq.c
@@ -32,7 +32,7 @@ long double _Q_dtoq(const double a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_RAW_D(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND(Q,D,4,2,C,A);
 #else
   FP_EXTEND(Q,D,2,1,C,A);
diff --git a/sysdeps/sparc/sparc32/q_qtod.c b/sysdeps/sparc/sparc32/q_qtod.c
index e0987fc..fe64467 100644
--- a/sysdeps/sparc/sparc32/q_qtod.c
+++ b/sysdeps/sparc/sparc32/q_qtod.c
@@ -32,7 +32,7 @@ double _Q_qtod(const long double a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC(D,Q,2,4,R,A);
 #else
   FP_TRUNC(D,Q,1,2,R,A);
diff --git a/sysdeps/sparc/sparc32/q_qtos.c b/sysdeps/sparc/sparc32/q_qtos.c
index d150c7f..36dc247 100644
--- a/sysdeps/sparc/sparc32/q_qtos.c
+++ b/sysdeps/sparc/sparc32/q_qtos.c
@@ -32,7 +32,7 @@ float _Q_qtos(const long double a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_Q(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC(S,Q,1,4,R,A);
 #else
   FP_TRUNC(S,Q,1,2,R,A);
diff --git a/sysdeps/sparc/sparc32/q_stoq.c b/sysdeps/sparc/sparc32/q_stoq.c
index 93fb054..6cd8704 100644
--- a/sysdeps/sparc/sparc32/q_stoq.c
+++ b/sysdeps/sparc/sparc32/q_stoq.c
@@ -31,7 +31,7 @@ long double _Q_stoq(const float a)
   long double c;
 
   FP_UNPACK_RAW_S(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND(Q,S,4,1,C,A);
 #else
   FP_EXTEND(Q,S,2,1,C,A);
diff --git a/sysdeps/sparc/sparc64/qp_dtoq.c b/sysdeps/sparc/sparc64/qp_dtoq.c
index 7942c95..022cb09 100644
--- a/sysdeps/sparc/sparc64/qp_dtoq.c
+++ b/sysdeps/sparc/sparc64/qp_dtoq.c
@@ -31,7 +31,7 @@ void _Qp_dtoq(long double *c, const double a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_RAW_D(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND(Q,D,4,2,C,A);
 #else
   FP_EXTEND(Q,D,2,1,C,A);
diff --git a/sysdeps/sparc/sparc64/qp_qtod.c b/sysdeps/sparc/sparc64/qp_qtod.c
index 78e1a20..953e2d8 100644
--- a/sysdeps/sparc/sparc64/qp_qtod.c
+++ b/sysdeps/sparc/sparc64/qp_qtod.c
@@ -32,7 +32,7 @@ double _Qp_qtod(const long double *a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_QP(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC(D,Q,2,4,R,A);
 #else
   FP_TRUNC(D,Q,1,2,R,A);
diff --git a/sysdeps/sparc/sparc64/qp_qtos.c b/sysdeps/sparc/sparc64/qp_qtos.c
index 87901f1..1b932ca 100644
--- a/sysdeps/sparc/sparc64/qp_qtos.c
+++ b/sysdeps/sparc/sparc64/qp_qtos.c
@@ -32,7 +32,7 @@ float _Qp_qtos(const long double *a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_SEMIRAW_QP(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_TRUNC(S,Q,1,4,R,A);
 #else
   FP_TRUNC(S,Q,1,2,R,A);
diff --git a/sysdeps/sparc/sparc64/qp_stoq.c b/sysdeps/sparc/sparc64/qp_stoq.c
index 005afce..4d1c854e 100644
--- a/sysdeps/sparc/sparc64/qp_stoq.c
+++ b/sysdeps/sparc/sparc64/qp_stoq.c
@@ -31,7 +31,7 @@ void _Qp_stoq(long double *c, const float a)
 
   FP_INIT_ROUNDMODE;
   FP_UNPACK_RAW_S(A, a);
-#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
+#if _FP_W_TYPE_SIZE < 64
   FP_EXTEND(Q,S,4,1,C,A);
 #else
   FP_EXTEND(Q,S,2,1,C,A);