diff options
| author | Nelson Chu <nelson.chu@sifive.com> | 2020-12-09 13:53:22 +0800 |
|---|---|---|
| committer | Nelson Chu <nelson.chu@sifive.com> | 2020-12-10 10:50:44 +0800 |
| commit | c2137f55ad04e451d834048d4bfec1de2daea20e (patch) | |
| tree | 71848a36ae6d0a7e129af78179952d016007340a /opcodes | |
| parent | 8152e0407c25612c6a8079cc8e1a5c1fe14afdbf (diff) | |
| download | gdb-c2137f55ad04e451d834048d4bfec1de2daea20e.zip gdb-c2137f55ad04e451d834048d4bfec1de2daea20e.tar.gz gdb-c2137f55ad04e451d834048d4bfec1de2daea20e.tar.bz2 | |
RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions.
https://github.com/riscv/riscv-asm-manual/pull/61
We aleady have sext.w, so just add sext.b, sext.h, zext.b, zext.h
and zext.w. In a certain sense, zext.b is not a pseudo - It is an
alias of andi. Similarly, sext.b and sext.h are aliases of other
rvb instructions, when we enable b extension; But they are pseudos
when we just enable rvi. However, this patch does not consider the
rvb cases. Besides, zext.w is only valid in rv64.
gas/
* config/tc-riscv.c (riscv_ext): New function. Use md_assemblef
to expand the zext and sext pseudos, to give them a chance to be
expanded into c-ext instructions.
(macro): Handle M_ZEXTH, M_ZEXTW, M_SEXTB and M_SEXTH.
* testsuite/gas/riscv/ext.s: New testcase.
* testsuite/gas/riscv/ext-32.d: Likewise.
* testsuite/gas/riscv/ext-64.d: Likewise.
include/
* opcode/riscv.h (M_ZEXTH, M_ZEXTW, M_SEXTB, M_SEXTH.): Added.
opcodes/
* riscv-opc.c (riscv_opcodes): Add sext.[bh] and zext.[bhw].
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/ChangeLog | 4 | ||||
| -rw-r--r-- | opcodes/riscv-opc.c | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index b380119..92a9525 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,5 +1,9 @@ 2020-12-10 Nelson Chu <nelson.chu@sifive.com> + * riscv-opc.c (riscv_opcodes): Add sext.[bh] and zext.[bhw]. + +2020-12-10 Nelson Chu <nelson.chu@sifive.com> + * disassemble.h (riscv_get_disassembler): Declare. * disassemble.c (disassembler): Changed to riscv_get_disassembler. * riscv-dis.c (riscv_get_disassembler): Check the elf privileged spec diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c index 4d9ba36..f90d717 100644 --- a/opcodes/riscv-opc.c +++ b/opcodes/riscv-opc.c @@ -238,6 +238,10 @@ const struct riscv_opcode riscv_opcodes[] = {"mv", 0, INSN_CLASS_I, "d,s", MATCH_ADDI, MASK_ADDI | MASK_IMM, match_opcode, INSN_ALIAS }, {"move", 0, INSN_CLASS_C, "d,CV", MATCH_C_MV, MASK_C_MV, match_c_add, INSN_ALIAS }, {"move", 0, INSN_CLASS_I, "d,s", MATCH_ADDI, MASK_ADDI | MASK_IMM, match_opcode, INSN_ALIAS }, +{"sext.b", 0, INSN_CLASS_I, "d,s", 0, (int) M_SEXTB, match_never, INSN_MACRO }, +{"sext.h", 0, INSN_CLASS_I, "d,s", 0, (int) M_SEXTH, match_never, INSN_MACRO }, +{"zext.b", 0, INSN_CLASS_I, "d,s", MATCH_ANDI | ENCODE_ITYPE_IMM (255), MASK_ANDI | MASK_IMM, match_opcode, INSN_ALIAS }, +{"zext.h", 0, INSN_CLASS_I, "d,s", 0, (int) M_ZEXTH, match_never, INSN_MACRO }, {"andi", 0, INSN_CLASS_C, "Cs,Cw,Co", MATCH_C_ANDI, MASK_C_ANDI, match_opcode, INSN_ALIAS }, {"andi", 0, INSN_CLASS_I, "d,s,j", MATCH_ANDI, MASK_ANDI, match_opcode, 0 }, {"and", 0, INSN_CLASS_C, "Cs,Cw,Ct", MATCH_C_AND, MASK_C_AND, match_opcode, INSN_ALIAS }, @@ -370,6 +374,7 @@ const struct riscv_opcode riscv_opcodes[] = {"sd", 64, INSN_CLASS_C, "Ct,Cl(Cs)", MATCH_C_SD, MASK_C_SD, match_opcode, INSN_ALIAS|INSN_DREF|INSN_8_BYTE }, {"sd", 64, INSN_CLASS_I, "t,q(s)", MATCH_SD, MASK_SD, match_opcode, INSN_DREF|INSN_8_BYTE }, {"sd", 64, INSN_CLASS_I, "t,A,s", 0, (int) M_SD, match_never, INSN_MACRO }, +{"zext.w", 64, INSN_CLASS_I, "d,s", 0, (int) M_ZEXTW, match_never, INSN_MACRO }, {"sext.w", 64, INSN_CLASS_C, "d,CU", MATCH_C_ADDIW, MASK_C_ADDIW | MASK_RVC_IMM, match_rd_nonzero, INSN_ALIAS }, {"sext.w", 64, INSN_CLASS_I, "d,s", MATCH_ADDIW, MASK_ADDIW | MASK_IMM, match_opcode, INSN_ALIAS }, {"addiw", 64, INSN_CLASS_C, "d,CU,Co", MATCH_C_ADDIW, MASK_C_ADDIW, match_rd_nonzero, INSN_ALIAS }, |