RISC-V: Support Zmmul extension

gcc/ChangeLog:

	* common/config/riscv/riscv-common.cc: Add Zmmul.
	* config/riscv/riscv-opts.h (MASK_ZMMUL): New.
	(TARGET_ZMMUL): Ditto.
	* config/riscv/riscv.cc (riscv_option_override):Ditto.
	* config/riscv/riscv.md: Add Zmmul
	* config/riscv/riscv.opt: Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/zmmul-1.c: New test.
	* gcc.target/riscv/zmmul-2.c: New test.

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
index cb3a5d2..120a038 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -200,6 +200,8 @@ static const struct riscv_ext_version riscv_ext_version_table[] =
   {"zfh",       ISA_SPEC_CLASS_NONE, 1, 0},
   {"zfhmin",    ISA_SPEC_CLASS_NONE, 1, 0},
 
+  {"zmmul", ISA_SPEC_CLASS_NONE, 1, 0},
+
   /* Terminate the list.  */
   {NULL, ISA_SPEC_CLASS_NONE, 0, 0}
 };
@@ -1214,6 +1216,8 @@ static const riscv_ext_flag_table_t riscv_ext_flag_table[] =
   {"zfhmin",    &gcc_options::x_riscv_zf_subext, MASK_ZFHMIN},
   {"zfh",       &gcc_options::x_riscv_zf_subext, MASK_ZFH},
 
+  {"zmmul", &gcc_options::x_riscv_zm_subext, MASK_ZMMUL},
+
   {NULL, NULL, 0}
 };