target/riscv: rvk: add support for sha512 related instructions for RV64 in zknh extension

 - add sha512sum0, sha512sig0, sha512sum1 and sha512sig1 instructions

Co-authored-by: Zewen Ye <lustrew@foxmail.com>
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220423023510.30794-11-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

2 files changed, 58 insertions, 0 deletions

diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 02a0c71..d9ebb13 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -868,3 +868,8 @@ sha512sig0l 01 01010 ..... ..... 000 ..... 0110011 @r
 sha512sig0h 01 01110 ..... ..... 000 ..... 0110011 @r
 sha512sig1l 01 01011 ..... ..... 000 ..... 0110011 @r
 sha512sig1h 01 01111 ..... ..... 000 ..... 0110011 @r
+# *** RV64 Zknh Standard Extension ***
+sha512sig0  00 01000 00110 ..... 001 ..... 0010011 @r2
+sha512sig1  00 01000 00111 ..... 001 ..... 0010011 @r2
+sha512sum0  00 01000 00100 ..... 001 ..... 0010011 @r2
+sha512sum1  00 01000 00101 ..... 001 ..... 0010011 @r2
diff --git a/target/riscv/insn_trans/trans_rvk.c.inc b/target/riscv/insn_trans/trans_rvk.c.inc
index 9ed057a..8274b5a 100644
--- a/target/riscv/insn_trans/trans_rvk.c.inc
+++ b/target/riscv/insn_trans/trans_rvk.c.inc
@@ -278,3 +278,56 @@ static bool trans_sha512sig1h(DisasContext *ctx, arg_sha512sig1h *a)
     REQUIRE_ZKNH(ctx);
     return gen_sha512h_rv32(ctx, a, EXT_NONE, tcg_gen_rotli_i64, 3, 6, 19);
 }
+
+static bool gen_sha512_rv64(DisasContext *ctx, arg_r2 *a, DisasExtend ext,
+                            void (*func)(TCGv_i64, TCGv_i64, int64_t),
+                            int64_t num1, int64_t num2, int64_t num3)
+{
+    TCGv dest = dest_gpr(ctx, a->rd);
+    TCGv src1 = get_gpr(ctx, a->rs1, ext);
+    TCGv_i64 t0 = tcg_temp_new_i64();
+    TCGv_i64 t1 = tcg_temp_new_i64();
+    TCGv_i64 t2 = tcg_temp_new_i64();
+
+    tcg_gen_extu_tl_i64(t0, src1);
+    tcg_gen_rotri_i64(t1, t0, num1);
+    tcg_gen_rotri_i64(t2, t0, num2);
+    tcg_gen_xor_i64(t1, t1, t2);
+    func(t2, t0, num3);
+    tcg_gen_xor_i64(t1, t1, t2);
+    tcg_gen_trunc_i64_tl(dest, t1);
+
+    gen_set_gpr(ctx, a->rd, dest);
+    tcg_temp_free_i64(t0);
+    tcg_temp_free_i64(t1);
+    tcg_temp_free_i64(t2);
+    return true;
+}
+
+static bool trans_sha512sig0(DisasContext *ctx, arg_sha512sig0 *a)
+{
+    REQUIRE_64BIT(ctx);
+    REQUIRE_ZKNH(ctx);
+    return gen_sha512_rv64(ctx, a, EXT_NONE, tcg_gen_shri_i64, 1, 8, 7);
+}
+
+static bool trans_sha512sig1(DisasContext *ctx, arg_sha512sig1 *a)
+{
+    REQUIRE_64BIT(ctx);
+    REQUIRE_ZKNH(ctx);
+    return gen_sha512_rv64(ctx, a, EXT_NONE, tcg_gen_shri_i64, 19, 61, 6);
+}
+
+static bool trans_sha512sum0(DisasContext *ctx, arg_sha512sum0 *a)
+{
+    REQUIRE_64BIT(ctx);
+    REQUIRE_ZKNH(ctx);
+    return gen_sha512_rv64(ctx, a, EXT_NONE, tcg_gen_rotri_i64, 28, 34, 39);
+}
+
+static bool trans_sha512sum1(DisasContext *ctx, arg_sha512sum1 *a)
+{
+    REQUIRE_64BIT(ctx);
+    REQUIRE_ZKNH(ctx);
+    return gen_sha512_rv64(ctx, a, EXT_NONE, tcg_gen_rotri_i64, 14, 18, 41);
+}