target/riscv: rvv-1.0: add vsetivli instruction

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-73-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

2 files changed, 29 insertions, 0 deletions

diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index d7c6bc9af2..3b6524bad9 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -79,6 +79,7 @@
 @r_vm_1  ...... . ..... ..... ... ..... .......    &rmrr vm=1 %rs2 %rs1 %rd
 @r_vm_0  ...... . ..... ..... ... ..... .......    &rmrr vm=0 %rs2 %rs1 %rd
 @r2_zimm11 . zimm:11  ..... ... ..... ....... %rs1 %rd
+@r2_zimm10 .. zimm:10  ..... ... ..... ....... %rs1 %rd
 @r2_s    .......   ..... ..... ... ..... ....... %rs2 %rs1
 
 @hfence_gvma ....... ..... .....   ... ..... ....... %rs2 %rs1
@@ -672,6 +673,7 @@ vsext_vf4       010010 . ..... 00101 010 ..... 1010111 @r2_vm
 vsext_vf8       010010 . ..... 00011 010 ..... 1010111 @r2_vm
 
 vsetvli         0 ........... ..... 111 ..... 1010111  @r2_zimm11
+vsetivli        11 .......... ..... 111 ..... 1010111  @r2_zimm10
 vsetvl          1000000 ..... ..... 111 ..... 1010111  @r
 
 # *** RV32 Zba Standard Extension ***
diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
index ff8f6df8f7..e540b5d33c 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -160,6 +160,26 @@ static bool do_vsetvl(DisasContext *s, int rd, int rs1, TCGv s2)
     return true;
 }
 
+static bool do_vsetivli(DisasContext *s, int rd, TCGv s1, TCGv s2)
+{
+    TCGv dst;
+
+    if (!require_rvv(s) || !has_ext(s, RVV)) {
+        return false;
+    }
+
+    dst = dest_gpr(s, rd);
+
+    gen_helper_vsetvl(dst, cpu_env, s1, s2);
+    gen_set_gpr(s, rd, dst);
+    mark_vs_dirty(s);
+    tcg_gen_movi_tl(cpu_pc, s->pc_succ_insn);
+    tcg_gen_lookup_and_goto_ptr();
+    s->base.is_jmp = DISAS_NORETURN;
+
+    return true;
+}
+
 static bool trans_vsetvl(DisasContext *s, arg_vsetvl *a)
 {
     TCGv s2 = get_gpr(s, a->rs2, EXT_ZERO);
@@ -172,6 +192,13 @@ static bool trans_vsetvli(DisasContext *s, arg_vsetvli *a)
     return do_vsetvl(s, a->rd, a->rs1, s2);
 }
 
+static bool trans_vsetivli(DisasContext *s, arg_vsetivli *a)
+{
+    TCGv s1 = tcg_const_tl(a->rs1);
+    TCGv s2 = tcg_const_tl(a->zimm);
+    return do_vsetivli(s, a->rd, s1, s2);
+}
+
 /* vector register offset from env */
 static uint32_t vreg_ofs(DisasContext *s, int reg)
 {