[RFC 10/15] target/riscv: rvb: rotate (left/right)

[frank . chang]

From: Kito Cheng <kito.ch...@sifive.com>

Signed-off-by: Kito Cheng <kito.ch...@sifive.com>
Signed-off-by: Frank Chang <frank.ch...@sifive.com>
---
 target/riscv/insn32-64.decode           |  3 ++
 target/riscv/insn32.decode              |  3 ++
 target/riscv/insn_trans/trans_rvb.c.inc | 54 +++++++++++++++++++++++++
 target/riscv/translate.c                | 48 ++++++++++++++++++++++
 4 files changed, 108 insertions(+)

diff --git a/target/riscv/insn32-64.decode b/target/riscv/insn32-64.decode
index cc6b7d63774..a1a4b12f7ca 100644
--- a/target/riscv/insn32-64.decode
+++ b/target/riscv/insn32-64.decode
@@ -100,9 +100,12 @@ sbinvw     0110100 .......... 001 ..... 0111011 @r
 sbextw     0100100 .......... 101 ..... 0111011 @r
 slow       0010000 .......... 001 ..... 0111011 @r
 srow       0010000 .......... 101 ..... 0111011 @r
+rorw       0110000 .......... 101 ..... 0111011 @r
+rolw       0110000 .......... 001 ..... 0111011 @r
 
 sbsetiw    0010100 .......... 001 ..... 0011011 @sh5
 sbclriw    0100100 .......... 001 ..... 0011011 @sh5
 sbinviw    0110100 .......... 001 ..... 0011011 @sh5
 sloiw      0010000 .......... 001 ..... 0011011 @sh5
 sroiw      0010000 .......... 101 ..... 0011011 @sh5
+roriw      0110000 .......... 101 ..... 0011011 @sh5
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 6e3eef84144..01b8ebc4bee 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -617,6 +617,8 @@ sbinv      0110100 .......... 001 ..... 0110011 @r
 sbext      0100100 .......... 101 ..... 0110011 @r
 slo        0010000 .......... 001 ..... 0110011 @r
 sro        0010000 .......... 101 ..... 0110011 @r
+ror        0110000 .......... 101 ..... 0110011 @r
+rol        0110000 .......... 001 ..... 0110011 @r
 
 sbseti     001010 ........... 001 ..... 0010011 @sh
 sbclri     010010 ........... 001 ..... 0010011 @sh
@@ -624,3 +626,4 @@ sbinvi     011010 ........... 001 ..... 0010011 @sh
 sbexti     010010 ........... 101 ..... 0010011 @sh
 sloi       001000 ........... 001 ..... 0010011 @sh
 sroi       001000 ........... 101 ..... 0010011 @sh
+rori       011000 ........... 101 ..... 0010011 @sh
diff --git a/target/riscv/insn_trans/trans_rvb.c.inc 
b/target/riscv/insn_trans/trans_rvb.c.inc
index 4c93c5aab8b..ba8734203ac 100644
--- a/target/riscv/insn_trans/trans_rvb.c.inc
+++ b/target/riscv/insn_trans/trans_rvb.c.inc
@@ -189,7 +189,29 @@ static bool trans_sroi(DisasContext *ctx, arg_sroi *a)
     return gen_arith_shamt_tl(ctx, a, &gen_sro);
 }
 
+static bool trans_ror(DisasContext *ctx, arg_ror *a)
 {
+    REQUIRE_EXT(ctx, RVB);
+    return gen_arith(ctx, a, &tcg_gen_rotr_tl);
+}
+
+static bool trans_rori(DisasContext *ctx, arg_rori *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+
+    if (a->shamt >= TARGET_LONG_BITS) {
+        return false;
+    }
+
+    return gen_arith_shamt_tl(ctx, a, &tcg_gen_rotr_tl);
+}
+
+static bool trans_rol(DisasContext *ctx, arg_rol *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+    return gen_arith(ctx, a, &tcg_gen_rotl_tl);
+}
+
 /* RV64-only instructions */
 #ifdef TARGET_RISCV64
 
@@ -289,4 +311,36 @@ static bool trans_sroiw(DisasContext *ctx, arg_sroiw *a)
     return gen_arith_shamt_tl(ctx, a, &gen_srow);
 }
 
+static bool trans_rorw(DisasContext *ctx, arg_rorw *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+    return gen_arith(ctx, a, &gen_rorw);
+}
+
+static bool trans_roriw(DisasContext *ctx, arg_roriw *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+
+    if (a->shamt >= 32) {
+        return false;
+    }
+
+    if (a->shamt == 0) {
+        TCGv t = tcg_temp_new();
+        gen_get_gpr(t, a->rs1);
+        tcg_gen_ext32s_tl(t, t);
+        gen_set_gpr(a->rd, t);
+        tcg_temp_free(t);
+        return true;
+    }
+
+    return gen_arith_shamt_tl(ctx, a, &gen_rorw);
+}
+
+static bool trans_rolw(DisasContext *ctx, arg_rolw *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+    return gen_arith(ctx, a, &gen_rolw);
+}
+
 #endif
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 8972e247bd7..68870bd9202 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -1092,6 +1092,54 @@ static void gen_srow(TCGv ret, TCGv arg1, TCGv arg2)
     tcg_temp_free(t);
 }
 
+static void gen_rorw(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv shamt;
+    TCGv_i32 t1, t2;
+    shamt = tcg_temp_new();
+    t1 = tcg_temp_new_i32();
+    t2 = tcg_temp_new_i32();
+
+    gen_sbopw_shamt(shamt, arg2);
+
+    /* truncate to 32-bits */
+    tcg_gen_trunc_tl_i32(t1, arg1);
+    tcg_gen_trunc_tl_i32(t2, shamt);
+
+    tcg_gen_rotr_i32(t1, t1, t2);
+
+    /* sign-extend 64-bits */
+    tcg_gen_ext_i32_tl(ret, t1);
+
+    tcg_temp_free(shamt);
+    tcg_temp_free_i32(t1);
+    tcg_temp_free_i32(t2);
+}
+
+static void gen_rolw(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv shamt;
+    TCGv_i32 t1, t2;
+    shamt = tcg_temp_new();
+    t1 = tcg_temp_new_i32();
+    t2 = tcg_temp_new_i32();
+
+    gen_sbopw_shamt(shamt, arg2);
+
+    /* truncate to 32-bits */
+    tcg_gen_trunc_tl_i32(t1, arg1);
+    tcg_gen_trunc_tl_i32(t2, shamt);
+
+    tcg_gen_rotl_i32(t1, t1, t2);
+
+    /* sign-extend 64-bits */
+    tcg_gen_ext_i32_tl(ret, t1);
+
+    tcg_temp_free(shamt);
+    tcg_temp_free_i32(t1);
+    tcg_temp_free_i32(t2);
+}
+
 #endif
 
 static bool gen_arith(DisasContext *ctx, arg_r *a,
-- 
2.17.1