* [PATCH] RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions.
@ 2020-12-09 7:22 Nelson Chu
2020-12-09 23:24 ` Jim Wilson
0 siblings, 1 reply; 3+ messages in thread
From: Nelson Chu @ 2020-12-09 7:22 UTC (permalink / raw)
To: binutils, jimw, kito.cheng, andrew, palmer
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.
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.
* testsuite/gas/riscv/ext-noalias-32.d: Likewise.
* testsuite/gas/riscv/ext-noalias-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].
---
gas/config/tc-riscv.c | 33 +++++++++++++++++++++
gas/testsuite/gas/riscv/ext-32.d | 39 ++++++++++++++++++++++++
gas/testsuite/gas/riscv/ext-64.d | 51 ++++++++++++++++++++++++++++++++
gas/testsuite/gas/riscv/ext-noalias-32.d | 39 ++++++++++++++++++++++++
gas/testsuite/gas/riscv/ext-noalias-64.d | 51 ++++++++++++++++++++++++++++++++
gas/testsuite/gas/riscv/ext.s | 38 ++++++++++++++++++++++++
include/opcode/riscv.h | 4 +++
opcodes/riscv-opc.c | 5 ++++
8 files changed, 260 insertions(+)
create mode 100644 gas/testsuite/gas/riscv/ext-32.d
create mode 100644 gas/testsuite/gas/riscv/ext-64.d
create mode 100644 gas/testsuite/gas/riscv/ext-noalias-32.d
create mode 100644 gas/testsuite/gas/riscv/ext-noalias-64.d
create mode 100644 gas/testsuite/gas/riscv/ext.s
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index 5e140fe..f902486 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -1427,6 +1427,23 @@ load_const (int reg, expressionS *ep)
}
}
+/* Zero extend and sign extend byte/half-word/word. */
+
+static void
+riscv_ext (int destreg, int srcreg, unsigned shift, bfd_boolean sign)
+{
+ if (sign)
+ {
+ md_assemblef ("slli x%d, x%d, 0x%x", destreg, srcreg, shift);
+ md_assemblef ("srai x%d, x%d, 0x%x", destreg, destreg, shift);
+ }
+ else
+ {
+ md_assemblef ("slli x%d, x%d, 0x%x", destreg, srcreg, shift);
+ md_assemblef ("srli x%d, x%d, 0x%x", destreg, destreg, shift);
+ }
+}
+
/* Expand RISC-V assembly macros into one or more instructions. */
static void
macro (struct riscv_cl_insn *ip, expressionS *imm_expr,
@@ -1548,6 +1565,22 @@ macro (struct riscv_cl_insn *ip, expressionS *imm_expr,
riscv_call (rd, rs1, imm_expr, *imm_reloc);
break;
+ case M_ZEXTH:
+ riscv_ext (rd, rs1, xlen - 16, FALSE);
+ break;
+
+ case M_ZEXTW:
+ riscv_ext (rd, rs1, xlen - 32, FALSE);
+ break;
+
+ case M_SEXTB:
+ riscv_ext (rd, rs1, xlen - 8, TRUE);
+ break;
+
+ case M_SEXTH:
+ riscv_ext (rd, rs1, xlen - 16, TRUE);
+ break;
+
default:
as_bad (_("Macro %s not implemented"), ip->insn_mo->name);
break;
diff --git a/gas/testsuite/gas/riscv/ext-32.d b/gas/testsuite/gas/riscv/ext-32.d
new file mode 100644
index 0000000..918c9c8
--- /dev/null
+++ b/gas/testsuite/gas/riscv/ext-32.d
@@ -0,0 +1,39 @@
+#as: -march=rv32i
+#source: ext.s
+#objdump: -d
+
+.*:[ ]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ ]+0:[ ]+0ff57513[ ]+zext.b[ ]+a0,a0
+[ ]+4:[ ]+01051513[ ]+slli[ ]+a0,a0,0x10
+[ ]+8:[ ]+01055513[ ]+srli[ ]+a0,a0,0x10
+[ ]+c:[ ]+01851513[ ]+slli[ ]+a0,a0,0x18
+[ ]+10:[ ]+41855513[ ]+srai[ ]+a0,a0,0x18
+[ ]+14:[ ]+01051513[ ]+slli[ ]+a0,a0,0x10
+[ ]+18:[ ]+41055513[ ]+srai[ ]+a0,a0,0x10
+[ ]+1c:[ ]+0ff67593[ ]+zext.b[ ]+a1,a2
+[ ]+20:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+24:[ ]+0105d593[ ]+srli[ ]+a1,a1,0x10
+[ ]+28:[ ]+01861593[ ]+slli[ ]+a1,a2,0x18
+[ ]+2c:[ ]+4185d593[ ]+srai[ ]+a1,a1,0x18
+[ ]+30:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+34:[ ]+4105d593[ ]+srai[ ]+a1,a1,0x10
+[ ]+38:[ ]+0ff57513[ ]+zext.b[ ]+a0,a0
+[ ]+3c:[ ]+0542[ ]+slli[ ]+a0,a0,0x10
+[ ]+3e:[ ]+8141[ ]+srli[ ]+a0,a0,0x10
+[ ]+40:[ ]+0562[ ]+slli[ ]+a0,a0,0x18
+[ ]+42:[ ]+8561[ ]+srai[ ]+a0,a0,0x18
+[ ]+44:[ ]+0542[ ]+slli[ ]+a0,a0,0x10
+[ ]+46:[ ]+8541[ ]+srai[ ]+a0,a0,0x10
+[ ]+48:[ ]+0ff67593[ ]+zext.b[ ]+a1,a2
+[ ]+4c:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+50:[ ]+81c1[ ]+srli[ ]+a1,a1,0x10
+[ ]+52:[ ]+01861593[ ]+slli[ ]+a1,a2,0x18
+[ ]+56:[ ]+85e1[ ]+srai[ ]+a1,a1,0x18
+[ ]+58:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+5c:[ ]+85c1[ ]+srai[ ]+a1,a1,0x10
+#...
diff --git a/gas/testsuite/gas/riscv/ext-64.d b/gas/testsuite/gas/riscv/ext-64.d
new file mode 100644
index 0000000..49d109b
--- /dev/null
+++ b/gas/testsuite/gas/riscv/ext-64.d
@@ -0,0 +1,51 @@
+#as: -march=rv64i -defsym __64_bit__=1
+#source: ext.s
+#objdump: -d
+
+.*:[ ]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ ]+0:[ ]+0ff57513[ ]+zext.b[ ]+a0,a0
+[ ]+4:[ ]+03051513[ ]+slli[ ]+a0,a0,0x30
+[ ]+8:[ ]+03055513[ ]+srli[ ]+a0,a0,0x30
+[ ]+c:[ ]+03851513[ ]+slli[ ]+a0,a0,0x38
+[ ]+10:[ ]+43855513[ ]+srai[ ]+a0,a0,0x38
+[ ]+14:[ ]+03051513[ ]+slli[ ]+a0,a0,0x30
+[ ]+18:[ ]+43055513[ ]+srai[ ]+a0,a0,0x30
+[ ]+1c:[ ]+0ff67593[ ]+zext.b[ ]+a1,a2
+[ ]+20:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+24:[ ]+0305d593[ ]+srli[ ]+a1,a1,0x30
+[ ]+28:[ ]+03861593[ ]+slli[ ]+a1,a2,0x38
+[ ]+2c:[ ]+4385d593[ ]+srai[ ]+a1,a1,0x38
+[ ]+30:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+34:[ ]+4305d593[ ]+srai[ ]+a1,a1,0x30
+[ ]+38:[ ]+02051513[ ]+slli[ ]+a0,a0,0x20
+[ ]+3c:[ ]+02055513[ ]+srli[ ]+a0,a0,0x20
+[ ]+40:[ ]+0005051b[ ]+sext.w[ ]+a0,a0
+[ ]+44:[ ]+02061593[ ]+slli[ ]+a1,a2,0x20
+[ ]+48:[ ]+0205d593[ ]+srli[ ]+a1,a1,0x20
+[ ]+4c:[ ]+0006059b[ ]+sext.w[ ]+a1,a2
+[ ]+50:[ ]+0ff57513[ ]+zext.b[ ]+a0,a0
+[ ]+54:[ ]+1542[ ]+slli[ ]+a0,a0,0x30
+[ ]+56:[ ]+9141[ ]+srli[ ]+a0,a0,0x30
+[ ]+58:[ ]+1562[ ]+slli[ ]+a0,a0,0x38
+[ ]+5a:[ ]+9561[ ]+srai[ ]+a0,a0,0x38
+[ ]+5c:[ ]+1542[ ]+slli[ ]+a0,a0,0x30
+[ ]+5e:[ ]+9541[ ]+srai[ ]+a0,a0,0x30
+[ ]+60:[ ]+0ff67593[ ]+zext.b[ ]+a1,a2
+[ ]+64:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+68:[ ]+91c1[ ]+srli[ ]+a1,a1,0x30
+[ ]+6a:[ ]+03861593[ ]+slli[ ]+a1,a2,0x38
+[ ]+6e:[ ]+95e1[ ]+srai[ ]+a1,a1,0x38
+[ ]+70:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+74:[ ]+95c1[ ]+srai[ ]+a1,a1,0x30
+[ ]+76:[ ]+1502[ ]+slli[ ]+a0,a0,0x20
+[ ]+78:[ ]+9101[ ]+srli[ ]+a0,a0,0x20
+[ ]+7a:[ ]+2501[ ]+sext.w[ ]+a0,a0
+[ ]+7c:[ ]+02061593[ ]+slli[ ]+a1,a2,0x20
+[ ]+80:[ ]+9181[ ]+srli[ ]+a1,a1,0x20
+[ ]+82:[ ]+0006059b[ ]+sext.w[ ]+a1,a2
+#...
diff --git a/gas/testsuite/gas/riscv/ext-noalias-32.d b/gas/testsuite/gas/riscv/ext-noalias-32.d
new file mode 100644
index 0000000..7ec1a41
--- /dev/null
+++ b/gas/testsuite/gas/riscv/ext-noalias-32.d
@@ -0,0 +1,39 @@
+#as: -march=rv32i
+#source: ext.s
+#objdump: -d -Mno-aliases
+
+.*:[ ]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ ]+0:[ ]+0ff57513[ ]+andi[ ]+a0,a0,255
+[ ]+4:[ ]+01051513[ ]+slli[ ]+a0,a0,0x10
+[ ]+8:[ ]+01055513[ ]+srli[ ]+a0,a0,0x10
+[ ]+c:[ ]+01851513[ ]+slli[ ]+a0,a0,0x18
+[ ]+10:[ ]+41855513[ ]+srai[ ]+a0,a0,0x18
+[ ]+14:[ ]+01051513[ ]+slli[ ]+a0,a0,0x10
+[ ]+18:[ ]+41055513[ ]+srai[ ]+a0,a0,0x10
+[ ]+1c:[ ]+0ff67593[ ]+andi[ ]+a1,a2,255
+[ ]+20:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+24:[ ]+0105d593[ ]+srli[ ]+a1,a1,0x10
+[ ]+28:[ ]+01861593[ ]+slli[ ]+a1,a2,0x18
+[ ]+2c:[ ]+4185d593[ ]+srai[ ]+a1,a1,0x18
+[ ]+30:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+34:[ ]+4105d593[ ]+srai[ ]+a1,a1,0x10
+[ ]+38:[ ]+0ff57513[ ]+andi[ ]+a0,a0,255
+[ ]+3c:[ ]+0542[ ]+c.slli[ ]+a0,0x10
+[ ]+3e:[ ]+8141[ ]+c.srli[ ]+a0,0x10
+[ ]+40:[ ]+0562[ ]+c.slli[ ]+a0,0x18
+[ ]+42:[ ]+8561[ ]+c.srai[ ]+a0,0x18
+[ ]+44:[ ]+0542[ ]+c.slli[ ]+a0,0x10
+[ ]+46:[ ]+8541[ ]+c.srai[ ]+a0,0x10
+[ ]+48:[ ]+0ff67593[ ]+andi[ ]+a1,a2,255
+[ ]+4c:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+50:[ ]+81c1[ ]+c.srli[ ]+a1,0x10
+[ ]+52:[ ]+01861593[ ]+slli[ ]+a1,a2,0x18
+[ ]+56:[ ]+85e1[ ]+c.srai[ ]+a1,0x18
+[ ]+58:[ ]+01061593[ ]+slli[ ]+a1,a2,0x10
+[ ]+5c:[ ]+85c1[ ]+c.srai[ ]+a1,0x10
+#...
diff --git a/gas/testsuite/gas/riscv/ext-noalias-64.d b/gas/testsuite/gas/riscv/ext-noalias-64.d
new file mode 100644
index 0000000..543db1b
--- /dev/null
+++ b/gas/testsuite/gas/riscv/ext-noalias-64.d
@@ -0,0 +1,51 @@
+#as: -march=rv64i -defsym __64_bit__=1
+#source: ext.s
+#objdump: -d -Mno-aliases
+
+.*:[ ]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ ]+0:[ ]+0ff57513[ ]+andi[ ]+a0,a0,255
+[ ]+4:[ ]+03051513[ ]+slli[ ]+a0,a0,0x30
+[ ]+8:[ ]+03055513[ ]+srli[ ]+a0,a0,0x30
+[ ]+c:[ ]+03851513[ ]+slli[ ]+a0,a0,0x38
+[ ]+10:[ ]+43855513[ ]+srai[ ]+a0,a0,0x38
+[ ]+14:[ ]+03051513[ ]+slli[ ]+a0,a0,0x30
+[ ]+18:[ ]+43055513[ ]+srai[ ]+a0,a0,0x30
+[ ]+1c:[ ]+0ff67593[ ]+andi[ ]+a1,a2,255
+[ ]+20:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+24:[ ]+0305d593[ ]+srli[ ]+a1,a1,0x30
+[ ]+28:[ ]+03861593[ ]+slli[ ]+a1,a2,0x38
+[ ]+2c:[ ]+4385d593[ ]+srai[ ]+a1,a1,0x38
+[ ]+30:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+34:[ ]+4305d593[ ]+srai[ ]+a1,a1,0x30
+[ ]+38:[ ]+02051513[ ]+slli[ ]+a0,a0,0x20
+[ ]+3c:[ ]+02055513[ ]+srli[ ]+a0,a0,0x20
+[ ]+40:[ ]+0005051b[ ]+addiw[ ]+a0,a0,0
+[ ]+44:[ ]+02061593[ ]+slli[ ]+a1,a2,0x20
+[ ]+48:[ ]+0205d593[ ]+srli[ ]+a1,a1,0x20
+[ ]+4c:[ ]+0006059b[ ]+addiw[ ]+a1,a2,0
+[ ]+50:[ ]+0ff57513[ ]+andi[ ]+a0,a0,255
+[ ]+54:[ ]+1542[ ]+c.slli[ ]+a0,0x30
+[ ]+56:[ ]+9141[ ]+c.srli[ ]+a0,0x30
+[ ]+58:[ ]+1562[ ]+c.slli[ ]+a0,0x38
+[ ]+5a:[ ]+9561[ ]+c.srai[ ]+a0,0x38
+[ ]+5c:[ ]+1542[ ]+c.slli[ ]+a0,0x30
+[ ]+5e:[ ]+9541[ ]+c.srai[ ]+a0,0x30
+[ ]+60:[ ]+0ff67593[ ]+andi[ ]+a1,a2,255
+[ ]+64:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+68:[ ]+91c1[ ]+c.srli[ ]+a1,0x30
+[ ]+6a:[ ]+03861593[ ]+slli[ ]+a1,a2,0x38
+[ ]+6e:[ ]+95e1[ ]+c.srai[ ]+a1,0x38
+[ ]+70:[ ]+03061593[ ]+slli[ ]+a1,a2,0x30
+[ ]+74:[ ]+95c1[ ]+c.srai[ ]+a1,0x30
+[ ]+76:[ ]+1502[ ]+c.slli[ ]+a0,0x20
+[ ]+78:[ ]+9101[ ]+c.srli[ ]+a0,0x20
+[ ]+7a:[ ]+2501[ ]+c.addiw[ ]+a0,0
+[ ]+7c:[ ]+02061593[ ]+slli[ ]+a1,a2,0x20
+[ ]+80:[ ]+9181[ ]+c.srli[ ]+a1,0x20
+[ ]+82:[ ]+0006059b[ ]+addiw[ ]+a1,a2,0
+#...
diff --git a/gas/testsuite/gas/riscv/ext.s b/gas/testsuite/gas/riscv/ext.s
new file mode 100644
index 0000000..f957134
--- /dev/null
+++ b/gas/testsuite/gas/riscv/ext.s
@@ -0,0 +1,38 @@
+target:
+ .option norvc
+ zext.b a0, a0
+ zext.h a0, a0
+ sext.b a0, a0
+ sext.h a0, a0
+
+ zext.b a1, a2
+ zext.h a1, a2
+ sext.b a1, a2
+ sext.h a1, a2
+
+.ifdef __64_bit__
+ zext.w a0, a0
+ sext.w a0, a0
+
+ zext.w a1, a2
+ sext.w a1, a2
+.endif
+
+ .option rvc
+ zext.b a0, a0
+ zext.h a0, a0
+ sext.b a0, a0
+ sext.h a0, a0
+
+ zext.b a1, a2
+ zext.h a1, a2
+ sext.b a1, a2
+ sext.h a1, a2
+
+.ifdef __64_bit__
+ zext.w a0, a0
+ sext.w a0, a0
+
+ zext.w a1, a2
+ sext.w a1, a2
+.endif
diff --git a/include/opcode/riscv.h b/include/opcode/riscv.h
index 680780a..69307c0 100644
--- a/include/opcode/riscv.h
+++ b/include/opcode/riscv.h
@@ -478,6 +478,10 @@ enum
M_CALL,
M_J,
M_LI,
+ M_ZEXTH,
+ M_ZEXTW,
+ M_SEXTB,
+ M_SEXTH,
M_NUM_MACROS
};
diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index 7ca44dc..818fccb 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -238,6 +238,11 @@ 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 },
+{"zext.w", 0, INSN_CLASS_I, "d,s", 0, (int) M_ZEXTW, 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 },
--
2.7.4
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions.
2020-12-09 7:22 [PATCH] RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions Nelson Chu
@ 2020-12-09 23:24 ` Jim Wilson
2020-12-10 3:12 ` Nelson Chu
0 siblings, 1 reply; 3+ messages in thread
From: Jim Wilson @ 2020-12-09 23:24 UTC (permalink / raw)
To: Nelson Chu; +Cc: Binutils, Kito Cheng, Andrew Waterman, Palmer Dabbelt
On Tue, Dec 8, 2020 at 11:22 PM Nelson Chu <nelson.chu@sifive.com> wrote:
> 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.
>
This looks good to me. By the way, something simple like this you can just
self approve.
I don't think that the -Mno-aliases testcases are very useful. Doesn't
help test the macro instruction assembly support. And there is no
disassembly support for macro instructions, so there doesn't seem to be
much point to it. They might be useful with B extension support though,
since in that case they are all aliases not macros, and testing disassembly
of aliases with and without -Mno-aliases is useful. Anyways, there is no
harm to it, and if you want to add them that is fine.
Jim
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions.
2020-12-09 23:24 ` Jim Wilson
@ 2020-12-10 3:12 ` Nelson Chu
0 siblings, 0 replies; 3+ messages in thread
From: Nelson Chu @ 2020-12-10 3:12 UTC (permalink / raw)
To: Jim Wilson; +Cc: Binutils, Kito Cheng, Andrew Waterman, Palmer Dabbelt
On Thu, Dec 10, 2020 at 7:24 AM Jim Wilson <jimw@sifive.com> wrote:
> I don't think that the -Mno-aliases testcases are very useful. Doesn't help test the macro instruction assembly support. And there is no disassembly support for macro instructions, so there doesn't seem to be much point to it. They might be useful with B extension support though, since in that case they are all aliases not macros, and testing disassembly of aliases with and without -Mno-aliases is useful. Anyways, there is no harm to it, and if you want to add them that is fine.
Thanks, I remove the aliases testcases until we have supported the b
extensions. Add the aliases testcases for b should be enough in this
case.
Fixed and committed.
Thanks
Nelson
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2020-12-09 7:22 [PATCH] RISC-V: Add sext.[bh] and zext.[bhw] pseudo instructions Nelson Chu
2020-12-09 23:24 ` Jim Wilson
2020-12-10 3:12 ` Nelson Chu
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