[PATCH 06/45] target/riscv: Add vclmulh.vv decoding, translation and execution support

[Lawrence Hunter <lawrence.hunter@xxxxxxxxxxxxxxx>]

Signed-off-by: Lawrence Hunter <lawrence.hunter@xxxxxxxxxxxxxxx>
---
 target/riscv/helper.h                      |  1 +
 target/riscv/insn32.decode                 |  1 +
 target/riscv/insn_trans/trans_rvzvkb.c.inc |  1 +
 target/riscv/vcrypto_helper.c              | 13 +++++++++++++
 4 files changed, 16 insertions(+)

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 352921ead6..1c69c34a78 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -1146,3 +1146,4 @@ DEF_HELPER_FLAGS_3(sm4ks, TCG_CALL_NO_RWG_SE, tl, tl, tl, tl)
 /* Vector crypto functions */
 DEF_HELPER_6(vclmul_vv, void, ptr, ptr, ptr, ptr, env, i32)
 DEF_HELPER_6(vclmul_vx, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vclmulh_vv, void, ptr, ptr, ptr, ptr, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 6b8466424d..3ad8e2055b 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -912,3 +912,4 @@ czero_nez   0000111  ..... ..... 111 ..... 0110011 @r
 # *** RV64 Zvkb vector crypto extension ***
 vclmul_vv       001100 . ..... ..... 010 ..... 1010111 @r_vm
 vclmul_vx       001100 . ..... ..... 110 ..... 1010111 @r_vm
+vclmulh_vv      001101 . ..... ..... 010 ..... 1010111 @r_vm
diff --git a/target/riscv/insn_trans/trans_rvzvkb.c.inc b/target/riscv/insn_trans/trans_rvzvkb.c.inc
index 76efade1b6..63a8778acc 100644
--- a/target/riscv/insn_trans/trans_rvzvkb.c.inc
+++ b/target/riscv/insn_trans/trans_rvzvkb.c.inc
@@ -38,6 +38,7 @@ static bool vclmul_vv_check(DisasContext *s, arg_rmrr *a)
 }
 
 GEN_VV_MASKED_TRANS(vclmul_vv, vclmul_vv_check)
+GEN_VV_MASKED_TRANS(vclmulh_vv, vclmul_vv_check)
 
 #define GEN_VX_MASKED_TRANS(NAME, CHECK)                                \
 static bool trans_##NAME(DisasContext *s, arg_rmrr *a)                  \
diff --git a/target/riscv/vcrypto_helper.c b/target/riscv/vcrypto_helper.c
index 749a9cb30b..1891c29767 100644
--- a/target/riscv/vcrypto_helper.c
+++ b/target/riscv/vcrypto_helper.c
@@ -38,7 +38,20 @@ static uint64_t clmul64(uint64_t y, uint64_t x)
     return result;
 }
 
+static uint64_t clmulh64(uint64_t y, uint64_t x)
+{
+    uint64_t result = 0;
+    for (int j = 63; j >= 1; j--) {
+        if ((y >> j) & 1) {
+            result ^= (x >> (64 - j));
+        }
+    }
+    return result;
+}
+
 RVVCALL(OPIVV2, vclmul_vv, OP_UUU_D, H8, H8, H8, clmul64)
 GEN_VEXT_VV(vclmul_vv, 8)
 RVVCALL(OPIVX2, vclmul_vx, OP_UUU_D, H8, H8, clmul64)
 GEN_VEXT_VX(vclmul_vx, 8)
+RVVCALL(OPIVV2, vclmulh_vv, OP_UUU_D, H8, H8, H8, clmulh64)
+GEN_VEXT_VV(vclmulh_vv, 8)
-- 
2.39.2