patch-2.4.20 linux-2.4.20/arch/parisc/math-emu/sgl_float.h

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diff -urN linux-2.4.19/arch/parisc/math-emu/sgl_float.h linux-2.4.20/arch/parisc/math-emu/sgl_float.h
@@ -0,0 +1,486 @@
+/*
+ * Linux/PA-RISC Project (http://www.parisc-linux.org/)
+ *
+ * Floating-point emulation code
+ *  Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2, or (at your option)
+ *    any later version.
+ *
+ *    This program 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 General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifdef __NO_PA_HDRS
+    PA header file -- do not include this header file for non-PA builds.
+#endif
+
+/* 32-bit word grabing functions */
+#define Sgl_firstword(value) Sall(value)
+#define Sgl_secondword(value) dummy_location
+#define Sgl_thirdword(value) dummy_location
+#define Sgl_fourthword(value) dummy_location
+
+#define Sgl_sign(object) Ssign(object)
+#define Sgl_exponent(object) Sexponent(object)
+#define Sgl_signexponent(object) Ssignexponent(object)
+#define Sgl_mantissa(object) Smantissa(object)
+#define Sgl_exponentmantissa(object) Sexponentmantissa(object)
+#define Sgl_all(object) Sall(object)
+
+/* sgl_and_signs ands the sign bits of each argument and puts the result
+ * into the first argument. sgl_or_signs ors those same sign bits */
+#define Sgl_and_signs( src1dst, src2)		\
+    Sall(src1dst) = (Sall(src2)|~((unsigned int)1<<31)) & Sall(src1dst)
+#define Sgl_or_signs( src1dst, src2)		\
+    Sall(src1dst) = (Sall(src2)&((unsigned int)1<<31)) | Sall(src1dst)
+
+/* The hidden bit is always the low bit of the exponent */
+#define Sgl_clear_exponent_set_hidden(srcdst) Deposit_sexponent(srcdst,1)
+#define Sgl_clear_signexponent_set_hidden(srcdst) \
+    Deposit_ssignexponent(srcdst,1)
+#define Sgl_clear_sign(srcdst) Sall(srcdst) &= ~((unsigned int)1<<31)
+#define Sgl_clear_signexponent(srcdst) Sall(srcdst) &= 0x007fffff
+
+/* varamount must be less than 32 for the next three functions */
+#define Sgl_rightshift(srcdst, varamount)	\
+    Sall(srcdst) >>= varamount
+#define Sgl_leftshift(srcdst, varamount)	\
+    Sall(srcdst) <<= varamount
+#define Sgl_rightshift_exponentmantissa(srcdst, varamount) \
+    Sall(srcdst) = \
+	(Sexponentmantissa(srcdst) >> varamount) | \
+	(Sall(srcdst) & ((unsigned int)1<<31))
+
+#define Sgl_leftshiftby1_withextent(left,right,result) \
+    Shiftdouble(Sall(left),Extall(right),31,Sall(result))
+    
+#define Sgl_rightshiftby1_withextent(left,right,dst)		\
+    Shiftdouble(Sall(left),Extall(right),1,Extall(right))
+#define Sgl_arithrightshiftby1(srcdst)	\
+    Sall(srcdst) = (int)Sall(srcdst) >> 1
+    
+/* Sign extend the sign bit with an integer destination */
+#define Sgl_signextendedsign(value) Ssignedsign(value)
+
+#define Sgl_isone_hidden(sgl_value) (Shidden(sgl_value))
+#define Sgl_increment(sgl_value) Sall(sgl_value) += 1
+#define Sgl_increment_mantissa(sgl_value) \
+    Deposit_smantissa(sgl_value,sgl_value+1)
+#define Sgl_decrement(sgl_value) Sall(sgl_value) -= 1
+
+#define Sgl_isone_sign(sgl_value) (Is_ssign(sgl_value)!=0)
+#define Sgl_isone_hiddenoverflow(sgl_value) \
+    (Is_shiddenoverflow(sgl_value)!=0)
+#define Sgl_isone_lowmantissa(sgl_value) (Is_slow(sgl_value)!=0)
+#define Sgl_isone_signaling(sgl_value) (Is_ssignaling(sgl_value)!=0)
+#define Sgl_is_signalingnan(sgl_value) (Ssignalingnan(sgl_value)==0x1ff)
+#define Sgl_isnotzero(sgl_value) (Sall(sgl_value)!=0)
+#define Sgl_isnotzero_hiddenhigh7mantissa(sgl_value) \
+    (Shiddenhigh7mantissa(sgl_value)!=0)
+#define Sgl_isnotzero_low4(sgl_value) (Slow4(sgl_value)!=0)
+#define Sgl_isnotzero_exponent(sgl_value) (Sexponent(sgl_value)!=0)
+#define Sgl_isnotzero_mantissa(sgl_value) (Smantissa(sgl_value)!=0)
+#define Sgl_isnotzero_exponentmantissa(sgl_value) \
+    (Sexponentmantissa(sgl_value)!=0)
+#define Sgl_iszero(sgl_value) (Sall(sgl_value)==0)
+#define Sgl_iszero_signaling(sgl_value) (Is_ssignaling(sgl_value)==0)
+#define Sgl_iszero_hidden(sgl_value) (Is_shidden(sgl_value)==0)
+#define Sgl_iszero_hiddenoverflow(sgl_value) \
+    (Is_shiddenoverflow(sgl_value)==0)
+#define Sgl_iszero_hiddenhigh3mantissa(sgl_value) \
+    (Shiddenhigh3mantissa(sgl_value)==0)
+#define Sgl_iszero_hiddenhigh7mantissa(sgl_value) \
+    (Shiddenhigh7mantissa(sgl_value)==0)
+#define Sgl_iszero_sign(sgl_value) (Is_ssign(sgl_value)==0)
+#define Sgl_iszero_exponent(sgl_value) (Sexponent(sgl_value)==0)
+#define Sgl_iszero_mantissa(sgl_value) (Smantissa(sgl_value)==0)
+#define Sgl_iszero_exponentmantissa(sgl_value) \
+    (Sexponentmantissa(sgl_value)==0)
+#define Sgl_isinfinity_exponent(sgl_value) 		\
+    (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT)
+#define Sgl_isnotinfinity_exponent(sgl_value) 		\
+    (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT)
+#define Sgl_isinfinity(sgl_value)			\
+    (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT &&	\
+    Sgl_mantissa(sgl_value)==0)
+#define Sgl_isnan(sgl_value)				\
+    (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT &&	\
+    Sgl_mantissa(sgl_value)!=0)
+#define Sgl_isnotnan(sgl_value)				\
+    (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT ||	\
+    Sgl_mantissa(sgl_value)==0)
+#define Sgl_islessthan(sgl_op1,sgl_op2)			\
+    (Sall(sgl_op1) < Sall(sgl_op2))
+#define Sgl_isgreaterthan(sgl_op1,sgl_op2)		\
+    (Sall(sgl_op1) > Sall(sgl_op2))
+#define Sgl_isnotlessthan(sgl_op1,sgl_op2)		\
+    (Sall(sgl_op1) >= Sall(sgl_op2))
+#define Sgl_isequal(sgl_op1,sgl_op2)			\
+    (Sall(sgl_op1) == Sall(sgl_op2))
+
+#define Sgl_leftshiftby8(sgl_value) \
+    Sall(sgl_value) <<= 8
+#define Sgl_leftshiftby4(sgl_value) \
+    Sall(sgl_value) <<= 4
+#define Sgl_leftshiftby3(sgl_value) \
+    Sall(sgl_value) <<= 3
+#define Sgl_leftshiftby2(sgl_value) \
+    Sall(sgl_value) <<= 2
+#define Sgl_leftshiftby1(sgl_value) \
+    Sall(sgl_value) <<= 1
+#define Sgl_rightshiftby1(sgl_value) \
+    Sall(sgl_value) >>= 1
+#define Sgl_rightshiftby4(sgl_value) \
+    Sall(sgl_value) >>= 4
+#define Sgl_rightshiftby8(sgl_value) \
+    Sall(sgl_value) >>= 8
+    
+#define Sgl_ismagnitudeless(signlessleft,signlessright)			\
+/*  unsigned int signlessleft, signlessright; */			\
+      (signlessleft < signlessright)  
+    
+
+#define Sgl_copytoint_exponentmantissa(source,dest)     \
+    dest = Sexponentmantissa(source)
+
+/* A quiet NaN has the high mantissa bit clear and at least on other (in this
+ * case the adjacent bit) bit set. */
+#define Sgl_set_quiet(sgl_value) Deposit_shigh2mantissa(sgl_value,1)
+#define Sgl_set_exponent(sgl_value,exp) Deposit_sexponent(sgl_value,exp)
+
+#define Sgl_set_mantissa(dest,value) Deposit_smantissa(dest,value)
+#define Sgl_set_exponentmantissa(dest,value) \
+    Deposit_sexponentmantissa(dest,value)
+
+/*  An infinity is represented with the max exponent and a zero mantissa */
+#define Sgl_setinfinity_exponent(sgl_value) \
+    Deposit_sexponent(sgl_value,SGL_INFINITY_EXPONENT)
+#define Sgl_setinfinity_exponentmantissa(sgl_value)	\
+    Deposit_sexponentmantissa(sgl_value, \
+	(SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))))
+#define Sgl_setinfinitypositive(sgl_value)		\
+    Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH)))
+#define Sgl_setinfinitynegative(sgl_value)		\
+    Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) \
+    | ((unsigned int)1<<31)
+#define Sgl_setinfinity(sgl_value,sign)					\
+    Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | \
+     ((unsigned int)sign << 31)
+#define Sgl_sethigh4bits(sgl_value, extsign)  \
+    Deposit_shigh4(sgl_value,extsign)
+#define Sgl_set_sign(sgl_value,sign) Deposit_ssign(sgl_value,sign)
+#define Sgl_invert_sign(sgl_value)  \
+    Deposit_ssign(sgl_value,~Ssign(sgl_value))
+#define Sgl_setone_sign(sgl_value) Deposit_ssign(sgl_value,1)
+#define Sgl_setone_lowmantissa(sgl_value) Deposit_slow(sgl_value,1)
+#define Sgl_setzero_sign(sgl_value)  Sall(sgl_value) &= 0x7fffffff
+#define Sgl_setzero_exponent(sgl_value) Sall(sgl_value) &= 0x807fffff
+#define Sgl_setzero_mantissa(sgl_value) Sall(sgl_value) &= 0xff800000
+#define Sgl_setzero_exponentmantissa(sgl_value)  Sall(sgl_value) &= 0x80000000
+#define Sgl_setzero(sgl_value) Sall(sgl_value) = 0
+#define Sgl_setnegativezero(sgl_value) Sall(sgl_value) = (unsigned int)1 << 31
+
+/* Use following macro for both overflow & underflow conditions */
+#define ovfl -
+#define unfl +
+#define Sgl_setwrapped_exponent(sgl_value,exponent,op) \
+    Deposit_sexponent(sgl_value,(exponent op SGL_WRAP))
+
+#define Sgl_setlargestpositive(sgl_value) 				\
+    Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH)))	\
+                      | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 )
+#define Sgl_setlargestnegative(sgl_value)				\
+    Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH)))	\
+                      | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 )		\
+		      | ((unsigned int)1<<31)
+
+#define Sgl_setnegativeinfinity(sgl_value)	\
+    Sall(sgl_value) = 				\
+    ((1<<SGL_EXP_LENGTH) | SGL_INFINITY_EXPONENT) << (32-(1+SGL_EXP_LENGTH))
+#define Sgl_setlargest(sgl_value,sign) 					\
+    Sall(sgl_value) = (unsigned int)sign << 31 |			\
+        (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH)))		\
+	  | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 ))
+#define Sgl_setlargest_exponentmantissa(sgl_value)			\
+    Sall(sgl_value) = Sall(sgl_value) & ((unsigned int)1<<31) |		\
+        (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH)))		\
+	  | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 ))
+
+/* The high bit is always zero so arithmetic or logical shifts will work. */
+#define Sgl_right_align(srcdst,shift,extent)				\
+    /* sgl_floating_point srcdst; int shift; extension extent */	\
+    if (shift < 32) {							\
+	Extall(extent) = Sall(srcdst) << (32-(shift));			\
+    	Sall(srcdst) >>= shift;						\
+    }									\
+    else {								\
+	Extall(extent) = Sall(srcdst);					\
+	Sall(srcdst) = 0;						\
+    }
+#define Sgl_hiddenhigh3mantissa(sgl_value) Shiddenhigh3mantissa(sgl_value)
+#define Sgl_hidden(sgl_value) Shidden(sgl_value)
+#define Sgl_lowmantissa(sgl_value) Slow(sgl_value)
+
+/* The left argument is never smaller than the right argument */
+#define Sgl_subtract(sgl_left,sgl_right,sgl_result) \
+    Sall(sgl_result) = Sall(sgl_left) - Sall(sgl_right)
+
+/* Subtract right augmented with extension from left augmented with zeros and
+ * store into result and extension. */
+#define Sgl_subtract_withextension(left,right,extent,result)		\
+    /* sgl_floating_point left,right,result; extension extent */	\
+  Sgl_subtract(left,right,result);					\
+  if((Extall(extent) = 0-Extall(extent)))				\
+      Sall(result) = Sall(result)-1
+
+#define Sgl_addition(sgl_left,sgl_right,sgl_result) \
+    Sall(sgl_result) = Sall(sgl_left) + Sall(sgl_right)
+
+#define Sgl_xortointp1(left,right,result)			\
+    result = Sall(left) XOR Sall(right);
+
+#define Sgl_xorfromintp1(left,right,result)			\
+    Sall(result) = left XOR Sall(right)
+
+/* Need to Initialize */
+#define Sgl_makequietnan(dest)						\
+    Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH))	\
+                 | (1<<(32-(1+SGL_EXP_LENGTH+2)))
+#define Sgl_makesignalingnan(dest)					\
+    Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH))	\
+                 | (1<<(32-(1+SGL_EXP_LENGTH+1)))
+
+#define Sgl_normalize(sgl_opnd,exponent)			\
+	while(Sgl_iszero_hiddenhigh7mantissa(sgl_opnd)) {	\
+		Sgl_leftshiftby8(sgl_opnd);			\
+		exponent -= 8;					\
+	}							\
+	if(Sgl_iszero_hiddenhigh3mantissa(sgl_opnd)) {		\
+		Sgl_leftshiftby4(sgl_opnd);			\
+		exponent -= 4;					\
+	}							\
+	while(Sgl_iszero_hidden(sgl_opnd)) {			\
+		Sgl_leftshiftby1(sgl_opnd);			\
+		exponent -= 1;					\
+	}
+
+#define Sgl_setoverflow(sgl_opnd)				\
+	/* set result to infinity or largest number */		\
+	switch (Rounding_mode()) {				\
+		case ROUNDPLUS:					\
+			if (Sgl_isone_sign(sgl_opnd)) {		\
+				Sgl_setlargestnegative(sgl_opnd); \
+			}					\
+			else {					\
+				Sgl_setinfinitypositive(sgl_opnd); \
+			}					\
+			break;					\
+		case ROUNDMINUS:				\
+			if (Sgl_iszero_sign(sgl_opnd)) {	\
+				Sgl_setlargestpositive(sgl_opnd); \
+			}					\
+			else {					\
+				Sgl_setinfinitynegative(sgl_opnd); \
+			}					\
+			break;					\
+		case ROUNDNEAREST:				\
+			Sgl_setinfinity_exponentmantissa(sgl_opnd); \
+			break;					\
+		case ROUNDZERO:					\
+			Sgl_setlargest_exponentmantissa(sgl_opnd); \
+	}
+
+#define Sgl_denormalize(opnd,exponent,guard,sticky,inexact)		\
+	Sgl_clear_signexponent_set_hidden(opnd);			\
+	if (exponent >= (1 - SGL_P)) {					\
+		guard = (Sall(opnd) >> -exponent) & 1;			\
+		if (exponent < 0) sticky |= Sall(opnd) << (32+exponent); \
+		inexact = guard | sticky;				\
+		Sall(opnd) >>= (1-exponent);				\
+	}								\
+	else {								\
+		guard = 0;						\
+		sticky |= Sall(opnd);					\
+		inexact = sticky;					\
+		Sgl_setzero(opnd);					\
+	}
+
+/* 
+ * The fused multiply add instructions requires a single extended format,
+ * with 48 bits of mantissa.
+ */
+#define SGLEXT_THRESHOLD 48
+
+#define Sglext_setzero(valA,valB)	\
+    Sextallp1(valA) = 0; Sextallp2(valB) = 0
+
+#define Sglext_isnotzero_mantissap2(valB) (Sextallp2(valB)!=0)
+#define Sglext_isone_lowp1(val) (Sextlowp1(val)!=0)
+#define Sglext_isone_highp2(val) (Sexthighp2(val)!=0)
+#define Sglext_isnotzero_low31p2(val) (Sextlow31p2(val)!=0)
+#define Sglext_iszero(valA,valB) (Sextallp1(valA)==0 && Sextallp2(valB)==0)
+
+#define Sgl_copytoptr(src,destptr) *destptr = src
+#define Sgl_copyfromptr(srcptr,dest) dest = *srcptr
+#define Sglext_copy(srca,srcb,desta,destb) \
+    Sextallp1(desta) = Sextallp1(srca);	\
+    Sextallp2(destb) = Sextallp2(srcb)
+#define Sgl_copyto_sglext(src1,dest1,dest2) \
+	Sextallp1(dest1) = Sall(src1); Sextallp2(dest2) = 0
+
+#define Sglext_swap_lower(leftp2,rightp2)  \
+    Sextallp2(leftp2)  = Sextallp2(leftp2) XOR Sextallp2(rightp2);  \
+    Sextallp2(rightp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2);  \
+    Sextallp2(leftp2)  = Sextallp2(leftp2) XOR Sextallp2(rightp2)
+
+#define Sglext_setone_lowmantissap2(value) Deposit_dlowp2(value,1)
+
+/* The high bit is always zero so arithmetic or logical shifts will work. */
+#define Sglext_right_align(srcdstA,srcdstB,shift) \
+  {int shiftamt, sticky;						\
+    shiftamt = shift % 32;						\
+    sticky = 0;								\
+    switch (shift/32) {							\
+     case 0: if (shiftamt > 0) {					\
+	        sticky = Sextallp2(srcdstB) << 32 - (shiftamt);		\
+                Variable_shift_double(Sextallp1(srcdstA),		\
+		 Sextallp2(srcdstB),shiftamt,Sextallp2(srcdstB));	\
+	        Sextallp1(srcdstA) >>= shiftamt;			\
+	     }								\
+	     break;							\
+     case 1: if (shiftamt > 0) {					\
+	        sticky = (Sextallp1(srcdstA) << 32 - (shiftamt)) |	\
+			 Sextallp2(srcdstB);				\
+	     }								\
+	     else {							\
+		sticky = Sextallp2(srcdstB);				\
+	     }								\
+	     Sextallp2(srcdstB) = Sextallp1(srcdstA) >> shiftamt;	\
+	     Sextallp1(srcdstA) = 0;					\
+	     break;							\
+    }									\
+    if (sticky) Sglext_setone_lowmantissap2(srcdstB);			\
+  }
+
+/* The left argument is never smaller than the right argument */
+#define Sglext_subtract(lefta,leftb,righta,rightb,resulta,resultb) \
+    if( Sextallp2(rightb) > Sextallp2(leftb) ) Sextallp1(lefta)--; \
+    Sextallp2(resultb) = Sextallp2(leftb) - Sextallp2(rightb);	\
+    Sextallp1(resulta) = Sextallp1(lefta) - Sextallp1(righta)
+
+#define Sglext_addition(lefta,leftb,righta,rightb,resulta,resultb) \
+    /* If the sum of the low words is less than either source, then \
+     * an overflow into the next word occurred. */ \
+    if ((Sextallp2(resultb) = Sextallp2(leftb)+Sextallp2(rightb)) < \
+        Sextallp2(rightb)) \
+	    Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)+1; \
+    else Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)
+
+
+#define Sglext_arithrightshiftby1(srcdstA,srcdstB)	\
+    Shiftdouble(Sextallp1(srcdstA),Sextallp2(srcdstB),1,Sextallp2(srcdstB)); \
+    Sextallp1(srcdstA) = (int)Sextallp1(srcdstA) >> 1
+   
+#define Sglext_leftshiftby8(valA,valB) \
+    Shiftdouble(Sextallp1(valA),Sextallp2(valB),24,Sextallp1(valA)); \
+    Sextallp2(valB) <<= 8
+#define Sglext_leftshiftby4(valA,valB) \
+    Shiftdouble(Sextallp1(valA),Sextallp2(valB),28,Sextallp1(valA)); \
+    Sextallp2(valB) <<= 4
+#define Sglext_leftshiftby3(valA,valB) \
+    Shiftdouble(Sextallp1(valA),Sextallp2(valB),29,Sextallp1(valA)); \
+    Sextallp2(valB) <<= 3
+#define Sglext_leftshiftby2(valA,valB) \
+    Shiftdouble(Sextallp1(valA),Sextallp2(valB),30,Sextallp1(valA)); \
+    Sextallp2(valB) <<= 2
+#define Sglext_leftshiftby1(valA,valB) \
+    Shiftdouble(Sextallp1(valA),Sextallp2(valB),31,Sextallp1(valA)); \
+    Sextallp2(valB) <<= 1
+
+#define Sglext_rightshiftby4(valueA,valueB) \
+    Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),4,Sextallp2(valueB)); \
+    Sextallp1(valueA) >>= 4
+#define Sglext_rightshiftby3(valueA,valueB) \
+    Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),3,Sextallp2(valueB)); \
+    Sextallp1(valueA) >>= 3
+#define Sglext_rightshiftby1(valueA,valueB) \
+    Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),1,Sextallp2(valueB)); \
+    Sextallp1(valueA) >>= 1
+
+#define Sglext_xortointp1(left,right,result) Sgl_xortointp1(left,right,result)
+#define Sglext_xorfromintp1(left,right,result) \
+	Sgl_xorfromintp1(left,right,result)
+#define Sglext_copytoint_exponentmantissa(src,dest) \
+	Sgl_copytoint_exponentmantissa(src,dest)
+#define Sglext_ismagnitudeless(signlessleft,signlessright) \
+	Sgl_ismagnitudeless(signlessleft,signlessright)
+
+#define Sglext_set_sign(dbl_value,sign)  Sgl_set_sign(dbl_value,sign)  
+#define Sglext_clear_signexponent_set_hidden(srcdst) \
+	Sgl_clear_signexponent_set_hidden(srcdst) 
+#define Sglext_clear_signexponent(srcdst) Sgl_clear_signexponent(srcdst) 
+#define Sglext_clear_sign(srcdst) Sgl_clear_sign(srcdst) 
+#define Sglext_isone_hidden(dbl_value) Sgl_isone_hidden(dbl_value) 
+
+#define Sglext_denormalize(opndp1,opndp2,exponent,is_tiny)		\
+  {int sticky;								\
+    is_tiny = TRUE;							\
+    if (exponent == 0 && Sextallp2(opndp2)) {				\
+	switch (Rounding_mode()) {					\
+	case ROUNDPLUS:							\
+		if (Sgl_iszero_sign(opndp1))				\
+			if (Sgl_isone_hiddenoverflow(opndp1 + 1))	\
+				is_tiny = FALSE;			\
+		break;							\
+	case ROUNDMINUS:						\
+		if (Sgl_isone_sign(opndp1)) {				\
+			if (Sgl_isone_hiddenoverflow(opndp1 + 1))	\
+				is_tiny = FALSE;			\
+		}							\
+		break;							\
+	case ROUNDNEAREST:						\
+		if (Sglext_isone_highp2(opndp2) &&			\
+		    (Sglext_isone_lowp1(opndp1) || 			\
+		     Sglext_isnotzero_low31p2(opndp2)))			\
+			if (Sgl_isone_hiddenoverflow(opndp1 + 1))	\
+				is_tiny = FALSE;			\
+		break;							\
+	}								\
+    }									\
+    Sglext_clear_signexponent_set_hidden(opndp1);			\
+    if (exponent >= (1-DBL_P)) {					\
+	if (exponent >= -31) {						\
+	    if (exponent > -31) {					\
+		sticky = Sextallp2(opndp2) << 31+exponent;		\
+		Variable_shift_double(opndp1,opndp2,1-exponent,opndp2);	\
+		Sextallp1(opndp1) >>= 1-exponent;			\
+	    }								\
+	    else {							\
+		sticky = Sextallp2(opndp2);				\
+		Sextallp2(opndp2) = Sextallp1(opndp1);			\
+		Sextallp1(opndp1) = 0;					\
+	    }								\
+	}								\
+	else {								\
+	    sticky = (Sextallp1(opndp1) << 31+exponent) | 		\
+		     Sextallp2(opndp2);					\
+	    Sextallp2(opndp2) = Sextallp1(opndp1) >> -31-exponent;	\
+	    Sextallp1(opndp1) = 0;					\
+	}								\
+    }									\
+    else {								\
+	sticky = Sextallp1(opndp1) | Sextallp2(opndp2);			\
+	Sglext_setzero(opndp1,opndp2);					\
+    }									\
+    if (sticky) Sglext_setone_lowmantissap2(opndp2);			\
+    exponent = 0;							\
+  }
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)