binutils-gdb/include
Richard Sandiford 4989adac84 [AArch64][SVE 13/32] Add an F_STRICT flag
SVE predicate operands can appear in three forms:

1. unsuffixed: "Pn"
2. with a predication type: "Pn/[ZM]"
3. with a size suffix: "Pn.[BHSD]"

No variation is allowed: unsuffixed operands cannot have a (redundant)
suffix, and the suffixes can never be dropped.  Unsuffixed Pn are used
in LDR and STR, but they are also used for Pg operands in cases where
the result is scalar and where there is therefore no choice to be made
between "merging" and "zeroing".  This means that some Pg operands have
suffixes and others don't.

It would be possible to use context-sensitive parsing to handle
this difference.  The tc-aarch64.c code would then raise an error
if the wrong kind of suffix is used for a particular instruction.

However, we get much more user-friendly error messages if we parse
all three forms for all SVE instructions and record the suffix as a
qualifier.  The normal qualifier matching code can then report cases
where the wrong kind of suffix is used.  This is a slight extension
of existing usage, which really only checks for the wrong choice of
suffix within a particular kind of suffix.

The only catch is a that a "NIL" entry in the qualifier list
specifically means "no suffix should be present" (case 1 above).
NIL isn't a wildcard here.  It also means that an instruction that
requires all-NIL qualifiers can fail to match (because a suffix was
supplied when it shouldn't have been); this requires a slight change
to find_best_match.

This patch adds an F_STRICT flag to select this behaviour.
The flag will be set for all SVE instructions.  The behaviour
for other instructions doesn't change.

include/
	* opcode/aarch64.h (F_STRICT): New flag.

opcodes/
	* aarch64-opc.c (match_operands_qualifier): Handle F_STRICT.

gas/
	* config/tc-aarch64.c (find_best_match): Simplify, allowing an
	instruction with all-NIL qualifiers to fail to match.
2016-09-21 16:51:00 +01:00
..
aout Copyright update for binutils 2016-01-01 23:00:01 +10:30
cgen Copyright update for binutils 2016-01-01 23:00:01 +10:30
coff sparc-coff writing uninitialized memory 2016-06-11 17:25:35 +09:30
elf Fixes to legacy ARC relocations. 2016-08-26 12:09:17 +02:00
gdb Pass SIGLIBRT directly to child processes. 2016-07-15 06:35:37 -07:00
mach-o Copyright update for binutils 2016-01-01 23:00:01 +10:30
nlm Copyright update for binutils 2016-01-01 23:00:01 +10:30
opcode [AArch64][SVE 13/32] Add an F_STRICT flag 2016-09-21 16:51:00 +01:00
som Copyright update for binutils 2016-01-01 23:00:01 +10:30
vms Copyright update for binutils 2016-01-01 23:00:01 +10:30
alloca-conf.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ansidecl.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
bfdlink.h Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
binary-io.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
bout.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ChangeLog [AArch64][SVE 13/32] Add an F_STRICT flag 2016-09-21 16:51:00 +01:00
ChangeLog-0415 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-9103 Add copyright notices 2012-12-10 12:48:03 +00:00
COPYING
COPYING3 * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
demangle.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
dis-asm.h Add support to the ARC disassembler for selecting instruction classes. 2016-07-20 17:08:07 +01:00
dwarf2.def Copyright update for binutils 2016-01-01 23:00:01 +10:30
dwarf2.h Add DW_LANG_Rust 2016-05-17 11:11:20 -06:00
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MAINTAINERS Copyright update for binutils 2016-01-01 23:00:01 +10:30
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partition.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
plugin-api.h Add new plugin hooks to support querying section alignment and size. 2016-03-03 12:09:06 -08:00
progress.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
safe-ctype.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
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simple-object.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
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