Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 394 insertions, 0 deletions

diff --git a/arch/parisc/math-emu/dfmpy.c b/arch/parisc/math-emu/dfmpy.c
new file mode 100644
index 000000000000..4380f5a62ad1
--- /dev/null
+++ b/arch/parisc/math-emu/dfmpy.c
@@ -0,0 +1,394 @@
+/*
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/*
+ * BEGIN_DESC
+ *
+ *  File:
+ *      @(#)    pa/spmath/dfmpy.c               $Revision: 1.1 $
+ *
+ *  Purpose:
+ *      Double Precision Floating-point Multiply
+ *
+ *  External Interfaces:
+ *      dbl_fmpy(srcptr1,srcptr2,dstptr,status)
+ *
+ *  Internal Interfaces:
+ *
+ *  Theory:
+ *      <<please update with a overview of the operation of this file>>
+ *
+ * END_DESC
+*/
+
+
+#include "float.h"
+#include "dbl_float.h"
+
+/*
+ *  Double Precision Floating-point Multiply
+ */
+
+int
+dbl_fmpy(
+            dbl_floating_point *srcptr1,
+            dbl_floating_point *srcptr2,
+            dbl_floating_point *dstptr,
+            unsigned int *status)
+{
+        register unsigned int opnd1p1, opnd1p2, opnd2p1, opnd2p2;
+        register unsigned int opnd3p1, opnd3p2, resultp1, resultp2;
+        register int dest_exponent, count;
+        register boolean inexact = FALSE, guardbit = FALSE, stickybit = FALSE;
+        boolean is_tiny;
+
+        Dbl_copyfromptr(srcptr1,opnd1p1,opnd1p2);
+        Dbl_copyfromptr(srcptr2,opnd2p1,opnd2p2);
+
+        /* 
+         * set sign bit of result 
+         */
+        if (Dbl_sign(opnd1p1) ^ Dbl_sign(opnd2p1)) 
+                Dbl_setnegativezerop1(resultp1); 
+        else Dbl_setzerop1(resultp1);
+        /*
+         * check first operand for NaN's or infinity
+         */
+        if (Dbl_isinfinity_exponent(opnd1p1)) {
+                if (Dbl_iszero_mantissa(opnd1p1,opnd1p2)) {
+                        if (Dbl_isnotnan(opnd2p1,opnd2p2)) {
+                                if (Dbl_iszero_exponentmantissa(opnd2p1,opnd2p2)) {
+                                        /* 
+                                         * invalid since operands are infinity 
+                                         * and zero 
+                                         */
+                                        if (Is_invalidtrap_enabled())
+                                                return(INVALIDEXCEPTION);
+                                        Set_invalidflag();
+                                        Dbl_makequietnan(resultp1,resultp2);
+                                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                                        return(NOEXCEPTION);
+                                }
+                                /*
+                                 * return infinity
+                                 */
+                                Dbl_setinfinity_exponentmantissa(resultp1,resultp2);
+                                Dbl_copytoptr(resultp1,resultp2,dstptr);
+                                return(NOEXCEPTION);
+                        }
+                }
+                else {
+                        /*
+                         * is NaN; signaling or quiet?
+                         */
+                        if (Dbl_isone_signaling(opnd1p1)) {
+                                /* trap if INVALIDTRAP enabled */
+                                if (Is_invalidtrap_enabled()) 
+                                        return(INVALIDEXCEPTION);
+                                /* make NaN quiet */
+                                Set_invalidflag();
+                                Dbl_set_quiet(opnd1p1);
+                        }
+                        /* 
+                         * is second operand a signaling NaN? 
+                         */
+                        else if (Dbl_is_signalingnan(opnd2p1)) {
+                                /* trap if INVALIDTRAP enabled */
+                                if (Is_invalidtrap_enabled())
+                                        return(INVALIDEXCEPTION);
+                                /* make NaN quiet */
+                                Set_invalidflag();
+                                Dbl_set_quiet(opnd2p1);
+                                Dbl_copytoptr(opnd2p1,opnd2p2,dstptr);
+                                return(NOEXCEPTION);
+                        }
+                        /*
+                         * return quiet NaN
+                         */
+                        Dbl_copytoptr(opnd1p1,opnd1p2,dstptr);
+                        return(NOEXCEPTION);
+                }
+        }
+        /*
+         * check second operand for NaN's or infinity
+         */
+        if (Dbl_isinfinity_exponent(opnd2p1)) {
+                if (Dbl_iszero_mantissa(opnd2p1,opnd2p2)) {
+                        if (Dbl_iszero_exponentmantissa(opnd1p1,opnd1p2)) {
+                                /* invalid since operands are zero & infinity */
+                                if (Is_invalidtrap_enabled())
+                                        return(INVALIDEXCEPTION);
+                                Set_invalidflag();
+                                Dbl_makequietnan(opnd2p1,opnd2p2);
+                                Dbl_copytoptr(opnd2p1,opnd2p2,dstptr);
+                                return(NOEXCEPTION);
+                        }
+                        /*
+                         * return infinity
+                         */
+                        Dbl_setinfinity_exponentmantissa(resultp1,resultp2);
+                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                        return(NOEXCEPTION);
+                }
+                /*
+                 * is NaN; signaling or quiet?
+                 */
+                if (Dbl_isone_signaling(opnd2p1)) {
+                        /* trap if INVALIDTRAP enabled */
+                        if (Is_invalidtrap_enabled()) return(INVALIDEXCEPTION);
+                        /* make NaN quiet */
+                        Set_invalidflag();
+                        Dbl_set_quiet(opnd2p1);
+                }
+                /*
+                 * return quiet NaN
+                 */
+                Dbl_copytoptr(opnd2p1,opnd2p2,dstptr);
+                return(NOEXCEPTION);
+        }
+        /*
+         * Generate exponent 
+         */
+        dest_exponent = Dbl_exponent(opnd1p1) + Dbl_exponent(opnd2p1) -DBL_BIAS;
+
+        /*
+         * Generate mantissa
+         */
+        if (Dbl_isnotzero_exponent(opnd1p1)) {
+                /* set hidden bit */
+                Dbl_clear_signexponent_set_hidden(opnd1p1);
+        }
+        else {
+                /* check for zero */
+                if (Dbl_iszero_mantissa(opnd1p1,opnd1p2)) {
+                        Dbl_setzero_exponentmantissa(resultp1,resultp2);
+                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                        return(NOEXCEPTION);
+                }
+                /* is denormalized, adjust exponent */
+                Dbl_clear_signexponent(opnd1p1);
+                Dbl_leftshiftby1(opnd1p1,opnd1p2);
+                Dbl_normalize(opnd1p1,opnd1p2,dest_exponent);
+        }
+        /* opnd2 needs to have hidden bit set with msb in hidden bit */
+        if (Dbl_isnotzero_exponent(opnd2p1)) {
+                Dbl_clear_signexponent_set_hidden(opnd2p1);
+        }
+        else {
+                /* check for zero */
+                if (Dbl_iszero_mantissa(opnd2p1,opnd2p2)) {
+                        Dbl_setzero_exponentmantissa(resultp1,resultp2);
+                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                        return(NOEXCEPTION);
+                }
+                /* is denormalized; want to normalize */
+                Dbl_clear_signexponent(opnd2p1);
+                Dbl_leftshiftby1(opnd2p1,opnd2p2);
+                Dbl_normalize(opnd2p1,opnd2p2,dest_exponent);
+        }
+
+        /* Multiply two source mantissas together */
+
+        /* make room for guard bits */
+        Dbl_leftshiftby7(opnd2p1,opnd2p2);
+        Dbl_setzero(opnd3p1,opnd3p2);
+        /* 
+         * Four bits at a time are inspected in each loop, and a 
+         * simple shift and add multiply algorithm is used. 
+         */ 
+        for (count=1;count<=DBL_P;count+=4) {
+                stickybit |= Dlow4p2(opnd3p2);
+                Dbl_rightshiftby4(opnd3p1,opnd3p2);
+                if (Dbit28p2(opnd1p2)) {
+                        /* Twoword_add should be an ADDC followed by an ADD. */
+                        Twoword_add(opnd3p1, opnd3p2, opnd2p1<<3 | opnd2p2>>29, 
+                                    opnd2p2<<3);
+                }
+                if (Dbit29p2(opnd1p2)) {
+                        Twoword_add(opnd3p1, opnd3p2, opnd2p1<<2 | opnd2p2>>30, 
+                                    opnd2p2<<2);
+                }
+                if (Dbit30p2(opnd1p2)) {
+                        Twoword_add(opnd3p1, opnd3p2, opnd2p1<<1 | opnd2p2>>31,
+                                    opnd2p2<<1);
+                }
+                if (Dbit31p2(opnd1p2)) {
+                        Twoword_add(opnd3p1, opnd3p2, opnd2p1, opnd2p2);
+                }
+                Dbl_rightshiftby4(opnd1p1,opnd1p2);
+        }
+        if (Dbit3p1(opnd3p1)==0) {
+                Dbl_leftshiftby1(opnd3p1,opnd3p2);
+        }
+        else {
+                /* result mantissa >= 2. */
+                dest_exponent++;
+        }
+        /* check for denormalized result */
+        while (Dbit3p1(opnd3p1)==0) {
+                Dbl_leftshiftby1(opnd3p1,opnd3p2);
+                dest_exponent--;
+        }
+        /*
+         * check for guard, sticky and inexact bits 
+         */
+        stickybit |= Dallp2(opnd3p2) << 25;
+        guardbit = (Dallp2(opnd3p2) << 24) >> 31;
+        inexact = guardbit | stickybit;
+
+        /* align result mantissa */
+        Dbl_rightshiftby8(opnd3p1,opnd3p2);
+
+        /* 
+         * round result 
+         */
+        if (inexact && (dest_exponent>0 || Is_underflowtrap_enabled())) {
+                Dbl_clear_signexponent(opnd3p1);
+                switch (Rounding_mode()) {
+                        case ROUNDPLUS: 
+                                if (Dbl_iszero_sign(resultp1)) 
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                break;
+                        case ROUNDMINUS: 
+                                if (Dbl_isone_sign(resultp1)) 
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                break;
+                        case ROUNDNEAREST:
+                                if (guardbit) {
+                                if (stickybit || Dbl_isone_lowmantissap2(opnd3p2))
+                                Dbl_increment(opnd3p1,opnd3p2);
+                                }
+                }
+                if (Dbl_isone_hidden(opnd3p1)) dest_exponent++;
+        }
+        Dbl_set_mantissa(resultp1,resultp2,opnd3p1,opnd3p2);
+
+        /* 
+         * Test for overflow
+         */
+        if (dest_exponent >= DBL_INFINITY_EXPONENT) {
+                /* trap if OVERFLOWTRAP enabled */
+                if (Is_overflowtrap_enabled()) {
+                        /*
+                         * Adjust bias of result
+                         */
+                        Dbl_setwrapped_exponent(resultp1,dest_exponent,ovfl);
+                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                        if (inexact) 
+                            if (Is_inexacttrap_enabled())
+                                return (OVERFLOWEXCEPTION | INEXACTEXCEPTION);
+                            else Set_inexactflag();
+                        return (OVERFLOWEXCEPTION);
+                }
+                inexact = TRUE;
+                Set_overflowflag();
+                /* set result to infinity or largest number */
+                Dbl_setoverflow(resultp1,resultp2);
+        }
+        /* 
+         * Test for underflow
+         */
+        else if (dest_exponent <= 0) {
+                /* trap if UNDERFLOWTRAP enabled */
+                if (Is_underflowtrap_enabled()) {
+                        /*
+                         * Adjust bias of result
+                         */
+                        Dbl_setwrapped_exponent(resultp1,dest_exponent,unfl);
+                        Dbl_copytoptr(resultp1,resultp2,dstptr);
+                        if (inexact) 
+                            if (Is_inexacttrap_enabled())
+                                return (UNDERFLOWEXCEPTION | INEXACTEXCEPTION);
+                            else Set_inexactflag();
+                        return (UNDERFLOWEXCEPTION);
+                }
+
+                /* Determine if should set underflow flag */
+                is_tiny = TRUE;
+                if (dest_exponent == 0 && inexact) {
+                        switch (Rounding_mode()) {
+                        case ROUNDPLUS: 
+                                if (Dbl_iszero_sign(resultp1)) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                        if (Dbl_isone_hiddenoverflow(opnd3p1))
+                                            is_tiny = FALSE;
+                                        Dbl_decrement(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        case ROUNDMINUS: 
+                                if (Dbl_isone_sign(resultp1)) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                        if (Dbl_isone_hiddenoverflow(opnd3p1))
+                                            is_tiny = FALSE;
+                                        Dbl_decrement(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        case ROUNDNEAREST:
+                                if (guardbit && (stickybit || 
+                                    Dbl_isone_lowmantissap2(opnd3p2))) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                        if (Dbl_isone_hiddenoverflow(opnd3p1))
+                                            is_tiny = FALSE;
+                                        Dbl_decrement(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        }
+                }
+
+                /*
+                 * denormalize result or set to signed zero
+                 */
+                stickybit = inexact;
+                Dbl_denormalize(opnd3p1,opnd3p2,dest_exponent,guardbit,
+                 stickybit,inexact);
+
+                /* return zero or smallest number */
+                if (inexact) {
+                        switch (Rounding_mode()) {
+                        case ROUNDPLUS: 
+                                if (Dbl_iszero_sign(resultp1)) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        case ROUNDMINUS: 
+                                if (Dbl_isone_sign(resultp1)) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        case ROUNDNEAREST:
+                                if (guardbit && (stickybit || 
+                                    Dbl_isone_lowmantissap2(opnd3p2))) {
+                                        Dbl_increment(opnd3p1,opnd3p2);
+                                }
+                                break;
+                        }
+                        if (is_tiny) Set_underflowflag();
+                }
+                Dbl_set_exponentmantissa(resultp1,resultp2,opnd3p1,opnd3p2);
+        }
+        else Dbl_set_exponent(resultp1,dest_exponent);
+        /* check for inexact */
+        Dbl_copytoptr(resultp1,resultp2,dstptr);
+        if (inexact) {
+                if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION);
+                else Set_inexactflag();
+        }
+        return(NOEXCEPTION);
+}