From fd195909ce14c7e852319613e7ec6a9a6e7b99ea Mon Sep 17 00:00:00 2001 From: Przemyslaw Wirkus Date: Wed, 28 Oct 2020 14:01:36 +0000 Subject: aarch64: Add DSB instruction Armv8.7-a variant This patch adds new variant (nXS) of DSB memory barrier instruction available in Armv8.7-a. New nXS variant has different encoding in comparison with pre Armv8.7-a DSB memory barrier variant thus new instruction and new operand was added. DSB memory nXS barrier variant specifies the limitation on the barrier operation. Allowed values are: DSB SYnXS|#28 DSB ISHnXS|#24 DSB NSHnXS|#20 DSB OSHnXS|#16 Please note that till now, for barriers, barrier operation was encoded in 4-bit unsigned immediate CRm field (in the range 0 to 15). For DSB memory nXS barrier variant, barrier operation is a 5-bit unsigned assembly instruction immediate, encoded in instruction in two bits CRm<3:2>: CRm<3:2> #imm 00 16 01 20 10 24 11 28 This patch extends current AArch64 barrier instructions with above mapping. Notable patch changes include: + New DSB memory barrier variant encoding for Armv8.7-a. + New operand BARRIER_DSB_NXS for above instruction in order to distinguish between existing and new DSB instruction flavour. + New set of DSB nXS barrier options. + New instruction inserter and extractor map between instruction immediate 5-bit value and 2-bit CRm field of the instruction itself (see FLD_CRm_dsb_nxs). + Regeneration of aarch64-[asm|dis|opc]-2.c files. + Test cases to cover new instruction assembling and disassembling. For more details regarding DSB memory barrier instruction and its Armv8.7-a flavour please refer to Arm A64 Instruction set documentation for Armv8-A architecture profile, see document pages 132-133 of [0]. [0]: https://developer.arm.com/docs/ddi0596/i gas/ChangeLog: 2020-10-23 Przemyslaw Wirkus * NEWS: Docs update. * config/tc-aarch64.c (parse_operands): Add AARCH64_OPND_BARRIER_DSB_NXS handler. (md_begin): Add content of aarch64_barrier_dsb_nxs_options to aarch64_barrier_opt_hsh hash. * testsuite/gas/aarch64/system-4-invalid.d: New test. * testsuite/gas/aarch64/system-4-invalid.l: New test. * testsuite/gas/aarch64/system-4-invalid.s: New test. * testsuite/gas/aarch64/system-4.d: New test. * testsuite/gas/aarch64/system-4.s: New test. include/ChangeLog: 2020-10-23 Przemyslaw Wirkus * opcode/aarch64.h (enum aarch64_opnd): New operand AARCH64_OPND_BARRIER_DSB_NXS. (aarch64_barrier_dsb_nxs_options): Declare DSB nXS options. opcodes/ChangeLog: 2020-10-23 Przemyslaw Wirkus * aarch64-asm.c (aarch64_ins_barrier_dsb_nxs): New inserter. * aarch64-asm.h (AARCH64_DECL_OPD_INSERTER): New inserter ins_barrier_dsb_nx. * aarch64-dis.c (aarch64_ext_barrier_dsb_nxs): New extractor. * aarch64-dis.h (AARCH64_DECL_OPD_EXTRACTOR): New extractor ext_barrier_dsb_nx. * aarch64-opc.c (aarch64_print_operand): New options table aarch64_barrier_dsb_nxs_options. * aarch64-opc.h (enum aarch64_field_kind): New field name FLD_CRm_dsb_nxs. * aarch64-tbl.h (struct aarch64_opcode): Define DSB nXS barrier Armv8.7-a instruction. * aarch64-asm-2.c: Regenerated. * aarch64-dis-2.c: Regenerated. * aarch64-opc-2.c: Regenerated. --- gas/testsuite/gas/aarch64/system-4-invalid.d | 3 +++ gas/testsuite/gas/aarch64/system-4-invalid.l | 11 +++++++++++ gas/testsuite/gas/aarch64/system-4-invalid.s | 16 ++++++++++++++++ gas/testsuite/gas/aarch64/system-4.d | 16 ++++++++++++++++ gas/testsuite/gas/aarch64/system-4.s | 12 ++++++++++++ 5 files changed, 58 insertions(+) create mode 100644 gas/testsuite/gas/aarch64/system-4-invalid.d create mode 100644 gas/testsuite/gas/aarch64/system-4-invalid.l create mode 100644 gas/testsuite/gas/aarch64/system-4-invalid.s create mode 100644 gas/testsuite/gas/aarch64/system-4.d create mode 100644 gas/testsuite/gas/aarch64/system-4.s (limited to 'gas/testsuite') diff --git a/gas/testsuite/gas/aarch64/system-4-invalid.d b/gas/testsuite/gas/aarch64/system-4-invalid.d new file mode 100644 index 0000000..62d38eb --- /dev/null +++ b/gas/testsuite/gas/aarch64/system-4-invalid.d @@ -0,0 +1,3 @@ +#name: Invalid DSB memory nXS barrier variant +#source: system-4-invalid.s +#error_output: system-4-invalid.l diff --git a/gas/testsuite/gas/aarch64/system-4-invalid.l b/gas/testsuite/gas/aarch64/system-4-invalid.l new file mode 100644 index 0000000..5a01e39 --- /dev/null +++ b/gas/testsuite/gas/aarch64/system-4-invalid.l @@ -0,0 +1,11 @@ +.*: Assembler messages: +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #17' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #18' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #19' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #21' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #22' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #23' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #25' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #26' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #27' +.*: Error: immediate value out of range 0 to 15 at operand 1 -- `dsb #29' diff --git a/gas/testsuite/gas/aarch64/system-4-invalid.s b/gas/testsuite/gas/aarch64/system-4-invalid.s new file mode 100644 index 0000000..cadad58 --- /dev/null +++ b/gas/testsuite/gas/aarch64/system-4-invalid.s @@ -0,0 +1,16 @@ +/* Armv8.7-a DSB memory nXS barrier variant. */ +.arch armv8.7-a + + dsb #17 + dsb #18 + dsb #19 + + dsb #21 + dsb #22 + dsb #23 + + dsb #25 + dsb #26 + dsb #27 + + dsb #29 diff --git a/gas/testsuite/gas/aarch64/system-4.d b/gas/testsuite/gas/aarch64/system-4.d new file mode 100644 index 0000000..0f600f8 --- /dev/null +++ b/gas/testsuite/gas/aarch64/system-4.d @@ -0,0 +1,16 @@ +#name: DSB memory nXS barrier variant +#objdump: -dr + +.*: file format .* + +Disassembly of section \.text: + +0+ <.*>: +.*: d503323f dsb oshnxs +.*: d503363f dsb nshnxs +.*: d5033a3f dsb ishnxs +.*: d5033e3f dsb synxs +.*: d503323f dsb oshnxs +.*: d503363f dsb nshnxs +.*: d5033a3f dsb ishnxs +.*: d5033e3f dsb synxs diff --git a/gas/testsuite/gas/aarch64/system-4.s b/gas/testsuite/gas/aarch64/system-4.s new file mode 100644 index 0000000..f95eb35 --- /dev/null +++ b/gas/testsuite/gas/aarch64/system-4.s @@ -0,0 +1,12 @@ +/* Armv8.7-a DSB memory nXS barrier variant. */ +.arch armv8.7-a + + dsb #16 + dsb #20 + dsb #24 + dsb #28 + + dsb oshnxs + dsb nshnxs + dsb ishnxs + dsb synxs -- cgit v1.1