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, 83 insertions, 0 deletions

diff --git a/arch/m68k/fpsp040/x_unsupp.S b/arch/m68k/fpsp040/x_unsupp.S
new file mode 100644
index 000000000000..4ec57285b683
--- /dev/null
+++ b/arch/m68k/fpsp040/x_unsupp.S
@@ -0,0 +1,83 @@
+|
+|       x_unsupp.sa 3.3 7/1/91
+|
+|       fpsp_unsupp --- FPSP handler for unsupported data type exception
+|
+| Trap vector #55       (See table 8-1 Mc68030 User's manual).
+| Invoked when the user program encounters a data format (packed) that
+| hardware does not support or a data type (denormalized numbers or un-
+| normalized numbers).
+| Normalizes denorms and unnorms, unpacks packed numbers then stores
+| them back into the machine to let the 040 finish the operation.
+|
+| Unsupp calls two routines:
+|       1. get_op -  gets the operand(s)
+|       2. res_func - restore the function back into the 040 or
+|                       if fmove.p fpm,<ea> then pack source (fpm)
+|                       and store in users memory <ea>.
+|
+|  Input: Long fsave stack frame
+|
+|
+
+|               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+|       THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA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.
+
+X_UNSUPP:       |idnt    2,1 | Motorola 040 Floating Point Software Package
+
+        |section        8
+
+#include "fpsp.h"
+
+        |xref   get_op
+        |xref   res_func
+        |xref   gen_except
+        |xref   fpsp_fmt_error
+
+        .global fpsp_unsupp
+fpsp_unsupp:
+|
+        link            %a6,#-LOCAL_SIZE
+        fsave           -(%a7)
+        moveml          %d0-%d1/%a0-%a1,USER_DA(%a6)
+        fmovemx %fp0-%fp3,USER_FP0(%a6)
+        fmoveml %fpcr/%fpsr/%fpiar,USER_FPCR(%a6)
+
+
+        moveb           (%a7),VER_TMP(%a6) |save version number
+        moveb           (%a7),%d0               |test for valid version num
+        andib           #0xf0,%d0               |test for $4x
+        cmpib           #VER_4,%d0      |must be $4x or exit
+        bnel            fpsp_fmt_error
+
+        fmovel          #0,%FPSR                |clear all user status bits
+        fmovel          #0,%FPCR                |clear all user control bits
+|
+|       The following lines are used to ensure that the FPSR
+|       exception byte and condition codes are clear before proceeding,
+|       except in the case of fmove, which leaves the cc's intact.
+|
+unsupp_con:
+        movel           USER_FPSR(%a6),%d1
+        btst            #5,CMDREG1B(%a6)        |looking for fmove out
+        bne             fmove_con
+        andl            #0xFF00FF,%d1   |clear all but aexcs and qbyte
+        bras            end_fix
+fmove_con:
+        andl            #0x0FFF40FF,%d1 |clear all but cc's, snan bit, aexcs, and qbyte
+end_fix:
+        movel           %d1,USER_FPSR(%a6)
+
+        st              UFLG_TMP(%a6)   |set flag for unsupp data
+
+        bsrl            get_op          |everything okay, go get operand(s)
+        bsrl            res_func        |fix up stack frame so can restore it
+        clrl            -(%a7)
+        moveb           VER_TMP(%a6),(%a7) |move idle fmt word to top of stack
+        bral            gen_except
+|
+        |end