[PATCH v1 6/6] RISC-V: Add the Zifencei extension

[Palmer Dabbelt]

Recent versions of binutils default to an ISA spec version that doesn't
include Zifencei as part of I, so Linux has recently started passing
this in -march.

Signed-off-by: Palmer Dabbelt <palmer at rivosinc.com>
---
 target-riscv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target-riscv.c b/target-riscv.c
index afd6fafa..ff4dfba3 100644
--- a/target-riscv.c
+++ b/target-riscv.c
@@ -18,6 +18,7 @@
 #define RISCV_FPU	(RISCV_FLOAT|RISCV_DOUBLE|RISCV_FDIV)
 #define RISCV_GENERIC	(RISCV_MUL|RISCV_DIV|RISCV_ATOMIC|RISCV_FPU)
 #define RISCV_ZICSR	(1 << 10)
+#define RISCV_ZIFENCEI	(1 << 11)
 
 static unsigned int riscv_flags;
 
@@ -39,6 +40,7 @@ static void parse_march_riscv(const char *arg)
 		{ "d",		RISCV_DOUBLE|RISCV_FDIV|RISCV_ZICSR },
 		{ "c",		RISCV_COMP },
 		{ "_zicsr",	RISCV_ZICSR },
+		{ "_zifencei",	RISCV_ZIFENCEI },
 	};
 	int i;
 
@@ -132,6 +134,8 @@ static void predefine_riscv(const struct target *self)
 		predefine("__riscv_muldiv", 1, "1");
 	if (riscv_flags & RISCV_ZICSR)
 		predefine("__riscv_zicsr", 1, "1");
+	if (riscv_flags & RISCV_ZIFENCEI)
+		predefine("__riscv_zifencei", 1, "1");
 
 	if (cmodel)
 		predefine_strong("__riscv_cmodel_%s", cmodel);
-- 
2.34.1