* [binutils-gdb] aarch64: Treat operand "SME list of ZA tiles" as immediate (PR 31561)
@ 2024-04-09 15:22 Jens Remus
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From: Jens Remus @ 2024-04-09 15:22 UTC (permalink / raw)
To: binutils-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6f3cf71845e68409724aef1cfef3b5a44beecf53
commit 6f3cf71845e68409724aef1cfef3b5a44beecf53
Author: Jens Remus <jremus@linux.ibm.com>
Date: Tue Apr 9 17:21:53 2024 +0200
aarch64: Treat operand "SME list of ZA tiles" as immediate (PR 31561)
The AArch64 instruction table (aarch64-tbl.h) defines the operand
"SME list of ZA tiles" (SME_list_of_64bit_tiles) as immediate. During
assembly it is correctly encoded as immediate value (imm.value) in
parse_operands. During disassembly it is first correctly decoded as
immediate value (imm.value) in aarch64_ext_imm called by
aarch64_extract_operand, but then erroneously treated as register
number (reg.regno) in aarch64_print_operand.
This resolves the assembler test case "SME extension (ZERO)" to
erroneously fail on s390. On AArch64 - being little-endian - the struct
aarch64_opnd_info union fields reg.regno and imm.value share their
least-significant bits. On s390 - being big-endian - they do not.
opcodes/
PR binutils/31561
* aarch64-opc.c: Treat operand "SME list of ZA tiles" as
immediate.
Bug: https://sourceware.org/PR31561
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Acked-by: Nick Clifton <nickc@redhat.com>
Diff:
---
opcodes/aarch64-opc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index e88c616f4a9..4a7a6ae784b 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -4236,7 +4236,7 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
break;
case AARCH64_OPND_SME_list_of_64bit_tiles:
- print_sme_za_list (buf, size, opnd->reg.regno, styler);
+ print_sme_za_list (buf, size, opnd->imm.value, styler);
break;
case AARCH64_OPND_SME_ZA_array_off1x4:
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