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| author | Delia Burduv <Delia.Burduv@arm.com> | 2019-10-30 13:23:35 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2019-10-30 13:23:35 +0000 |
| commit | 1820262bc909121a408e030195789a70513b9139 (patch) | |
| tree | 8e02ca27c07cf6fb65fc65c240bdef1d555449c4 /opcodes/aarch64-opc.c | |
| parent | 864619bb2e68e4ec8fa5bcfc87b00bf6667601e3 (diff) | |
| download | gdb-1820262bc909121a408e030195789a70513b9139.zip gdb-1820262bc909121a408e030195789a70513b9139.tar.gz gdb-1820262bc909121a408e030195789a70513b9139.tar.bz2 | |
Modify the ARNM assembler to accept the omission of the immediate argument for the writeback form of the LDRAA and LDRAB mnemonics
This is a shorthand for the immediate argument being 0, as described here:
https://developer.arm.com/docs/ddi0596/latest/base-instructions-alphabetic-order/ldraa-ldrab-load-register-with-pointer-authentication
This is because the instructions still have a use with an immediate
argument of 0, unlike loads without the PAC functionality. Currently,
the mnemonics are
LDRAA Xt, [Xn, #<simm10>]!
LDRAB Xt, [Xn, #<simm10>]!
After this patch they become
LDRAA Xt, [Xn {, #<simm10>}]!
LDRAB Xt, [Xn {, #<simm10>}]!
gas * config/tc-aarch64.c (parse_address_main): Accept the omission of
the immediate argument for ldraa and ldrab as a shorthand for the
immediate being 0.
* testsuite/gas/aarch64/ldraa-ldrab-no-offset.d: New test.
* testsuite/gas/aarch64/ldraa-ldrab-no-offset.s: New test.
* testsuite/gas/aarch64/illegal-ldraa.s: Modified to accept the
writeback form with no offset.
* testsuite/gas/aarch64/illegal-ldraa.s: Removed missing offset
error.
opcodes * aarch64-opc.c (print_immediate_offset_address): Don't print the
immediate for the writeback form of ldraa/ldrab if it is 0.
* aarch64-tbl.h: Updated the documentation for ADDR_SIMM10.
* aarch64-opc-2.c: Regenerated.
Diffstat (limited to 'opcodes/aarch64-opc.c')
| -rw-r--r-- | opcodes/aarch64-opc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c index 2e205e5..992a2af 100644 --- a/opcodes/aarch64-opc.c +++ b/opcodes/aarch64-opc.c @@ -3063,7 +3063,12 @@ print_immediate_offset_address (char *buf, size_t size, if (opnd->addr.writeback) { if (opnd->addr.preind) - snprintf (buf, size, "[%s, #%d]!", base, opnd->addr.offset.imm); + { + if (opnd->type == AARCH64_OPND_ADDR_SIMM10 && !opnd->addr.offset.imm) + snprintf (buf, size, "[%s]!", base); + else + snprintf (buf, size, "[%s, #%d]!", base, opnd->addr.offset.imm); + } else snprintf (buf, size, "[%s], #%d", base, opnd->addr.offset.imm); } |