UNRATIFIED RISC-V: Add 'ZiCond' extension

[DO NOT MERGE] Until 'ZiCond' extension is frozen/ratified and final version number is determined, this patch should not be merged upstream. This commit uses version 1.0 as in the documentation. This commit adds support for the latest draft of RISC-V Integer Conditional (ZiCond) extension consisting of 2 new instructions. This is based on the early draft of 'ZiCond' extension on GitHub: <riscvarchive/riscv-zicond@e05301d> bfd/ChangeLog: * elfxx-riscv.c (riscv_supported_std_z_ext): Add 'ZiCond'. (riscv_multi_subset_supports): Support new instruction class. (riscv_multi_subset_supports_ext): Likewise. gas/ChangeLog: * testsuite/gas/riscv/zicond.s: New test for 'ZiCond'. * testsuite/gas/riscv/zicond.d: Likewise. * testsuite/gas/riscv/zicond-noarch.d: New test for architecture failure. * testsuite/gas/riscv/zicond-noarch.l: Likewise. include/ChangeLog: * opcode/riscv-opc.h (MATCH_CZERO_EQZ, MASK_CZERO_EQZ, MATCH_CZERO_NEZ, MASK_CZERO_NEZ): New. * opcode/riscv.h (enum riscv_insn_class): Add new instruction class INSN_CLASS_ZICOND. opcodes/ChangeLog: * riscv-opc.c (riscv_opcodes): Add new instructions from the 'ZiCond' extension.
a4lg · Feb 8, 2023 · dcc2ddb · dcc2ddb
1 parent 4170bc7
commit dcc2ddb
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diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
@@ -1168,6 +1168,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
   {"zicbom",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zicbop",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zicboz",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
+  {"zicond",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zicsr",		ISA_SPEC_CLASS_20191213,	2, 0,  0 },
   {"zicsr",		ISA_SPEC_CLASS_20190608,	2, 0,  0 },
   {"zifencei",		ISA_SPEC_CLASS_20191213,	2, 0,  0 },
@@ -2258,6 +2259,8 @@ riscv_multi_subset_supports (riscv_parse_subset_t *rps,
       return riscv_subset_supports (rps, "zicbop");
     case INSN_CLASS_ZICBOZ:
       return riscv_subset_supports (rps, "zicboz");
+    case INSN_CLASS_ZICOND:
+      return riscv_subset_supports (rps, "zicond");
     case INSN_CLASS_ZICSR:
       return riscv_subset_supports (rps, "zicsr");
     case INSN_CLASS_ZIFENCEI:
@@ -2407,6 +2410,8 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps,
       return "zicbop";
     case INSN_CLASS_ZICBOZ:
       return "zicboz";
+    case INSN_CLASS_ZICOND:
+      return "zicond";
     case INSN_CLASS_ZICSR:
       return "zicsr";
     case INSN_CLASS_ZIFENCEI:

diff --git a/gas/testsuite/gas/riscv/zicond-noarch.d b/gas/testsuite/gas/riscv/zicond-noarch.d
@@ -0,0 +1,3 @@
+#as: -march=rv32i
+#source: zicond.s
+#error_output: zicond-noarch.l
diff --git a/gas/testsuite/gas/riscv/zicond-noarch.l b/gas/testsuite/gas/riscv/zicond-noarch.l
@@ -0,0 +1,3 @@
+.*: Assembler messages:
+.*: Error: unrecognized opcode `czero\.eqz a0,a1,a2', extension `zicond' required
+.*: Error: unrecognized opcode `czero\.nez a3,a4,a5', extension `zicond' required
diff --git a/gas/testsuite/gas/riscv/zicond.d b/gas/testsuite/gas/riscv/zicond.d
@@ -0,0 +1,11 @@
+#as: -march=rv32i_zicond
+#source: zicond.s
+#objdump: -d
+
+.*:[ 	]+file format .*
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ 	]+[0-9a-f]+:[ 	]+0ec5d533[ 	]+czero\.eqz[ 	]+a0,a1,a2
+[ 	]+[0-9a-f]+:[ 	]+0ef776b3[ 	]+czero\.nez[ 	]+a3,a4,a5
diff --git a/gas/testsuite/gas/riscv/zicond.s b/gas/testsuite/gas/riscv/zicond.s
@@ -0,0 +1,3 @@
+target:
+	czero.eqz	a0, a1, a2
+	czero.nez	a3, a4, a5
diff --git a/include/opcode/riscv-opc.h b/include/opcode/riscv-opc.h
@@ -2113,6 +2113,11 @@
 #define MASK_CBO_INVAL 0xfff07fff
 #define MATCH_CBO_ZERO 0x40200f
 #define MASK_CBO_ZERO 0xfff07fff
+/* ZiCond instructions.  */
+#define MATCH_CZERO_EQZ 0xe005033
+#define MASK_CZERO_EQZ 0xfe00707f
+#define MATCH_CZERO_NEZ 0xe007033
+#define MASK_CZERO_NEZ 0xfe00707f
 /* Zawrs intructions.  */
 #define MATCH_WRS_NTO 0x00d00073
 #define MASK_WRS_NTO 0xffffffff
@@ -3115,6 +3120,9 @@ DECLARE_INSN(cbo_clean, MATCH_CBO_CLEAN, MASK_CBO_CLEAN);
 DECLARE_INSN(cbo_flush, MATCH_CBO_FLUSH, MASK_CBO_FLUSH);
 DECLARE_INSN(cbo_inval, MATCH_CBO_INVAL, MASK_CBO_INVAL);
 DECLARE_INSN(cbo_zero, MATCH_CBO_ZERO, MASK_CBO_ZERO);
+/* ZiCond instructions.  */
+DECLARE_INSN(czero_eqz, MATCH_CZERO_EQZ, MASK_CZERO_EQZ)
+DECLARE_INSN(czero_nez, MATCH_CZERO_NEZ, MASK_CZERO_NEZ)
 /* Zawrs instructions.  */
 DECLARE_INSN(wrs_nto, MATCH_WRS_NTO, MASK_WRS_NTO)
 DECLARE_INSN(wrs_sto, MATCH_WRS_STO, MASK_WRS_STO)

diff --git a/include/opcode/riscv.h b/include/opcode/riscv.h
@@ -375,6 +375,7 @@ enum riscv_insn_class
   INSN_CLASS_Q,
   INSN_CLASS_F_AND_C,
   INSN_CLASS_D_AND_C,
+  INSN_CLASS_ZICOND,
   INSN_CLASS_ZICSR,
   INSN_CLASS_ZIFENCEI,
   INSN_CLASS_ZIHINTPAUSE,

diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
@@ -935,6 +935,10 @@ const struct riscv_opcode riscv_opcodes[] =
 {"cbo.inval",  0, INSN_CLASS_ZICBOM, "0(s)", MATCH_CBO_INVAL, MASK_CBO_INVAL, match_opcode, 0 },
 {"cbo.zero",   0, INSN_CLASS_ZICBOZ, "0(s)", MATCH_CBO_ZERO, MASK_CBO_ZERO, match_opcode, 0 },
 
+/* ZiCond instructions. */
+{"czero.eqz",  0, INSN_CLASS_ZICOND, "d,s,t", MATCH_CZERO_EQZ, MASK_CZERO_EQZ, match_opcode, 0 },
+{"czero.nez",  0, INSN_CLASS_ZICOND, "d,s,t", MATCH_CZERO_NEZ, MASK_CZERO_NEZ, match_opcode, 0 },
+
 /* Zawrs instructions.  */
 {"wrs.nto",    0, INSN_CLASS_ZAWRS, "", MATCH_WRS_NTO, MASK_WRS_NTO, match_opcode, 0 },
 {"wrs.sto",    0, INSN_CLASS_ZAWRS, "", MATCH_WRS_STO, MASK_WRS_STO, match_opcode, 0 },