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, 140 insertions, 0 deletions

diff --git a/arch/m68k/fpsp040/binstr.S b/arch/m68k/fpsp040/binstr.S
new file mode 100644
index 000000000000..d53555c0a2b6
--- /dev/null
+++ b/arch/m68k/fpsp040/binstr.S
@@ -0,0 +1,140 @@
+|
+|       binstr.sa 3.3 12/19/90
+|
+|
+|       Description: Converts a 64-bit binary integer to bcd.
+|
+|       Input: 64-bit binary integer in d2:d3, desired length (LEN) in
+|          d0, and a  pointer to start in memory for bcd characters
+|          in d0. (This pointer must point to byte 4 of the first
+|          lword of the packed decimal memory string.)
+|
+|       Output: LEN bcd digits representing the 64-bit integer.
+|
+|       Algorithm:
+|               The 64-bit binary is assumed to have a decimal point before
+|               bit 63.  The fraction is multiplied by 10 using a mul by 2
+|               shift and a mul by 8 shift.  The bits shifted out of the
+|               msb form a decimal digit.  This process is iterated until
+|               LEN digits are formed.
+|
+|       A1. Init d7 to 1.  D7 is the byte digit counter, and if 1, the
+|               digit formed will be assumed the least significant.  This is
+|               to force the first byte formed to have a 0 in the upper 4 bits.
+|
+|       A2. Beginning of the loop:
+|               Copy the fraction in d2:d3 to d4:d5.
+|
+|       A3. Multiply the fraction in d2:d3 by 8 using bit-field
+|               extracts and shifts.  The three msbs from d2 will go into
+|               d1.
+|
+|       A4. Multiply the fraction in d4:d5 by 2 using shifts.  The msb
+|               will be collected by the carry.
+|
+|       A5. Add using the carry the 64-bit quantities in d2:d3 and d4:d5
+|               into d2:d3.  D1 will contain the bcd digit formed.
+|
+|       A6. Test d7.  If zero, the digit formed is the ms digit.  If non-
+|               zero, it is the ls digit.  Put the digit in its place in the
+|               upper word of d0.  If it is the ls digit, write the word
+|               from d0 to memory.
+|
+|       A7. Decrement d6 (LEN counter) and repeat the loop until zero.
+|
+|       Implementation Notes:
+|
+|       The registers are used as follows:
+|
+|               d0: LEN counter
+|               d1: temp used to form the digit
+|               d2: upper 32-bits of fraction for mul by 8
+|               d3: lower 32-bits of fraction for mul by 8
+|               d4: upper 32-bits of fraction for mul by 2
+|               d5: lower 32-bits of fraction for mul by 2
+|               d6: temp for bit-field extracts
+|               d7: byte digit formation word;digit count {0,1}
+|               a0: pointer into memory for packed bcd string formation
+|
+
+|               Copyright (C) Motorola, Inc. 1990
+|                       All Rights Reserved
+|
+|       THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA
+|       The copyright notice above does not evidence any
+|       actual or intended publication of such source code.
+
+|BINSTR    idnt    2,1 | Motorola 040 Floating Point Software Package
+
+        |section        8
+
+#include "fpsp.h"
+
+        .global binstr
+binstr:
+        moveml  %d0-%d7,-(%a7)
+|
+| A1: Init d7
+|
+        moveql  #1,%d7                  |init d7 for second digit
+        subql   #1,%d0                  |for dbf d0 would have LEN+1 passes
+|
+| A2. Copy d2:d3 to d4:d5.  Start loop.
+|
+loop:
+        movel   %d2,%d4                 |copy the fraction before muls
+        movel   %d3,%d5                 |to d4:d5
+|
+| A3. Multiply d2:d3 by 8; extract msbs into d1.
+|
+        bfextu  %d2{#0:#3},%d1          |copy 3 msbs of d2 into d1
+        asll    #3,%d2                  |shift d2 left by 3 places
+        bfextu  %d3{#0:#3},%d6          |copy 3 msbs of d3 into d6
+        asll    #3,%d3                  |shift d3 left by 3 places
+        orl     %d6,%d2                 |or in msbs from d3 into d2
+|
+| A4. Multiply d4:d5 by 2; add carry out to d1.
+|
+        asll    #1,%d5                  |mul d5 by 2
+        roxll   #1,%d4                  |mul d4 by 2
+        swap    %d6                     |put 0 in d6 lower word
+        addxw   %d6,%d1                 |add in extend from mul by 2
+|
+| A5. Add mul by 8 to mul by 2.  D1 contains the digit formed.
+|
+        addl    %d5,%d3                 |add lower 32 bits
+        nop                             |ERRATA ; FIX #13 (Rev. 1.2 6/6/90)
+        addxl   %d4,%d2                 |add with extend upper 32 bits
+        nop                             |ERRATA ; FIX #13 (Rev. 1.2 6/6/90)
+        addxw   %d6,%d1                 |add in extend from add to d1
+        swap    %d6                     |with d6 = 0; put 0 in upper word
+|
+| A6. Test d7 and branch.
+|
+        tstw    %d7                     |if zero, store digit & to loop
+        beqs    first_d                 |if non-zero, form byte & write
+sec_d:
+        swap    %d7                     |bring first digit to word d7b
+        aslw    #4,%d7                  |first digit in upper 4 bits d7b
+        addw    %d1,%d7                 |add in ls digit to d7b
+        moveb   %d7,(%a0)+              |store d7b byte in memory
+        swap    %d7                     |put LEN counter in word d7a
+        clrw    %d7                     |set d7a to signal no digits done
+        dbf     %d0,loop                |do loop some more!
+        bras    end_bstr                |finished, so exit
+first_d:
+        swap    %d7                     |put digit word in d7b
+        movew   %d1,%d7                 |put new digit in d7b
+        swap    %d7                     |put LEN counter in word d7a
+        addqw   #1,%d7                  |set d7a to signal first digit done
+        dbf     %d0,loop                |do loop some more!
+        swap    %d7                     |put last digit in string
+        lslw    #4,%d7                  |move it to upper 4 bits
+        moveb   %d7,(%a0)+              |store it in memory string
+|
+| Clean up and return with result in fp0.
+|
+end_bstr:
+        moveml  (%a7)+,%d0-%d7
+        rts
+        |end