Corrected release notes URLs

Observe the C conventions for use of the FP register stack.  In particular,
free up any live fp registers prior to non-local control transfers.  Sigh.

This is not good.  The FP situation needs to be reviewed once the rest
of x86 nativeGen is stable.

genCCall (x86): pass float args in double format.

spillReg, loadReg (x86): always spill fp registers using double-sized
loads/stores, even if they nominally contain only a float value --
otherwise the spill loses the extra guard bits.

Finish pass 1 over the build system docs.

Fix some of the gross inaccuracies in this documentation.

Removed version number and reelucidated some text swallowed by index entries.

Changed default text size to "normal".

spillReg, loadReg (x86): spill above %esp, not below it.  Duh.  If you
spill below %esp, ccalls, which use stack below %esp, can trash the
spill area.

Updated version to 4.06

Sven's first autoheader commandment: Don't change config.h.in manually...!
(Why is mk/config.h.in in the repository? configure is not, either.)

Teach magicIdRegMaybe about R9 and R10.

Print a useful panic msg if getRegister(x86) can't reduce a tree.

pprInstr: implement GABS, GNEG, GSQRT.

Handle float args correctly for x86 ccalls.

Disable a dubious looking clause for trivialCode (x86), which was
generating bad code for some subtracts.

Implement the HP_CHK_GEN macro.  As a result, teach mkNativeHdr et al
about R9 and R10.

wibble

amodeToStix, GET_TAG: implement correctly for little-endian-32 and
supply implementation for big-endian-32.  Definitely won't work on
64-bit platforms.

genCodeInfoTable: put tag value into srt_len field for constr info tables.

"installing" is now called "building"

x86: free up all FP regs before doing a ccall.  This appears to be a
part of the x86 calling convention(s).

Added a bunch of #defines for {SIZEOF,ALIGNMENT}_{INT,WORD}{8,16,32,64}.
All this is a real hack: The include files need a more thorough restructuring.

Added note about necessary synching with MachDeps.h and fixed a small typo

Added more SIZEOF/ALIGNMENT tests

fix typo

Renamed from installing.sgml

Renamed to building.sgml

Corrected some URLs

Added an ID to the exceptions update section to use as a hyperlink destination

Announce 4.06

urk, Solaris sh doesn't understand [^0-9] in patterns, it seems.

Add missing final paragraph of explaination about x86 FP trickery.

Minor improvements to x86 FP fake-to-real insn translation.

genCCall for x86, as supplied, used PUSH et al to move args onto the C
stack ready for the call.  Reasonable as this seems, it causes a
problem with spill code, since the spiller spills relative to %esp and
assumes that %esp doesn't move.  If the args of a ccall involved any
spilled values, the resulting code would be wrong.

The One True Way is to do it like a RISC: move args to the stack
without adjusting %esp for each argument, then adjust it all at once
immediately prior to the call insn and un-adjust it immediately
afterwards.  genCCall now does this.  In general, push/pop and other
C-stack effecting operations should not be generated for the same
reason.

Add -optCrts-M80m for older compilers.  Sigh.

Added intToWord to PrelAddr.
Use it instead of int2Word#-hacks.

Start a NOTES file, recording known but un-fixed nativeGen bugs.

Fix syntax errors in #ifdef'd Alpha/Sparc bits.

Insert large commit message re x86 FP rehash as a comment.