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Richard Sandiford f96093c1f5 aarch64: Add maximum immediate value to aarch64_sys_reg
The immediate form of MSR has a 4-bit immediate field (in CRm).
However, many forms of MSR require a smaller immediate.  These cases
are identified by value in operand_general_constraint_met_p,
but they're now the common case rather than the exception.

This patch therefore adds the maximum value to the sys_reg
description and gets the range from there.  It also enforces
the minimum of 0, which avoids a situation in which:

  msr dit, #2

would give the expected:

  Error: immediate value out of range 0 to 1

whereas:

  msr dit, #-1

would give:

  Error: immediate value out of range 0 to 15

(from the later UIMM4 checking).

Also:

- we were reporting the first error above against the wrong operand
- TCO takes a single-bit immediate, but we previously allowed
  all 16 values.
  [https://developer.arm.com/documentation/ddi0596/2021-09/Base-Instructions/MSR--immediate---Move-immediate-value-to-Special-Register-?lang=en]

opcodes/
	* aarch64-opc.h (F_REG_MAX_VALUE, F_GET_REG_MAX_VALUE): New macros.
	* aarch64-opc.c (operand_general_constraint_met_p): Read the
	maximum MSR immediate value from aarch64_pstatefields.
	(aarch64_pstatefields): Add the maximum immediate value
	for each register.

gas/
	* testsuite/gas/aarch64/sysreg-4.s: Use an immediate value of 1
	rather than 8 for the TCO test.
	* testsuite/gas/aarch64/sysreg-4.d: Update accordingly.
	* testsuite/gas/aarch64/armv8_2-a-illegal.l: Fix operand number
	in MSR immediate error messages.
	* testsuite/gas/aarch64/diagnostic.l: Likewise.
	* testsuite/gas/aarch64/pan-illegal.l: Likewise.
	* testsuite/gas/aarch64/ssbs-illegal1.l: Likewise.
	* testsuite/gas/aarch64/illegal-sysreg-4b.s,
	* testsuite/gas/aarch64/illegal-sysreg-4b.d,
	* testsuite/gas/aarch64/illegal-sysreg-4b.l: New test.
2021-12-02 15:00:56 +00:00
bfd x86: Skip __[start|stop]_SECNAME for --gc-sections -z start-stop-gc 2021-12-02 03:55:10 -08:00
binutils binutils: add missing prefix for binutils/index.html rule 2021-12-01 16:00:49 -05:00
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gas aarch64: Add maximum immediate value to aarch64_sys_reg 2021-12-02 15:00:56 +00:00
gdb gdb, include: replace pragmas with DIAGNOSTIC macros, fix build with g++ 4.8 2021-12-02 08:24:25 -05:00
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gold gold: enable silent build rules 2021-11-30 19:41:31 -05:00
gprof gprof: enable silent build rules 2021-11-29 20:28:29 -05:00
include gdb, include: replace pragmas with DIAGNOSTIC macros, fix build with g++ 4.8 2021-12-02 08:24:25 -05:00
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ld x86: Skip __[start|stop]_SECNAME for --gc-sections -z start-stop-gc 2021-12-02 03:55:10 -08:00
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libctf libctf: re-generate configure 2021-12-02 07:51:57 -05:00
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opcodes aarch64: Add maximum immediate value to aarch64_sys_reg 2021-12-02 15:00:56 +00:00
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sim sim: testsuite: drop most specific istarget checks 2021-11-28 21:55:16 -05:00
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zlib zlib: enable silent build rules 2021-11-29 20:28:29 -05:00
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