target/riscv: Convert RV32I load/store insns to decodetree

Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Peer Adelt <peer.adelt@hni.uni-paderborn.de>

target/riscv/insn32.decode

@@ -23,6 +23,7 @@
 
 # immediates:
 %imm_i    20:s12
+%imm_s    25:s7 7:5
 %imm_b    31:s1 7:1 25:6 8:4     !function=ex_shift_1
 %imm_j    31:s1 12:8 20:1 21:10  !function=ex_shift_1
 %imm_u    12:s20                 !function=ex_shift_12
@@ -33,6 +34,7 @@
 # Formats 32:
 @i       ............    ..... ... ..... .......         imm=%imm_i     %rs1 %rd
 @b       .......   ..... ..... ... ..... ....... &b      imm=%imm_b %rs2 %rs1
+@s       .......   ..... ..... ... ..... .......         imm=%imm_s %rs2 %rs1
 @u       ....................      ..... .......         imm=%imm_u          %rd
 @j       ....................      ..... .......         imm=%imm_j          %rd
 
@@ -47,3 +49,11 @@ blt      ....... .....    ..... 100 ..... 1100011 @b
 bge      ....... .....    ..... 101 ..... 1100011 @b
 bltu     ....... .....    ..... 110 ..... 1100011 @b
 bgeu     ....... .....    ..... 111 ..... 1100011 @b
+lb       ............     ..... 000 ..... 0000011 @i
+lh       ............     ..... 001 ..... 0000011 @i
+lw       ............     ..... 010 ..... 0000011 @i
+lbu      ............     ..... 100 ..... 0000011 @i
+lhu      ............     ..... 101 ..... 0000011 @i
+sb       .......  .....   ..... 000 ..... 0100011 @s
+sh       .......  .....   ..... 001 ..... 0100011 @s
+sw       .......  .....   ..... 010 ..... 0100011 @s

target/riscv/insn_trans/trans_rvi.inc.c

@@ -82,3 +82,51 @@ static bool trans_bgeu(DisasContext *ctx, arg_bgeu *a)
     gen_branch(ctx, OPC_RISC_BGEU, a->rs1, a->rs2, a->imm);
     return true;
 }
+
+static bool trans_lb(DisasContext *ctx, arg_lb *a)
+{
+    gen_load(ctx, OPC_RISC_LB, a->rd, a->rs1, a->imm);
+    return true;
+}
+
+static bool trans_lh(DisasContext *ctx, arg_lh *a)
+{
+    gen_load(ctx, OPC_RISC_LH, a->rd, a->rs1, a->imm);
+    return true;
+}
+
+static bool trans_lw(DisasContext *ctx, arg_lw *a)
+{
+    gen_load(ctx, OPC_RISC_LW, a->rd, a->rs1, a->imm);
+    return true;
+}
+
+static bool trans_lbu(DisasContext *ctx, arg_lbu *a)
+{
+    gen_load(ctx, OPC_RISC_LBU, a->rd, a->rs1, a->imm);
+    return true;
+}
+
+static bool trans_lhu(DisasContext *ctx, arg_lhu *a)
+{
+    gen_load(ctx, OPC_RISC_LHU, a->rd, a->rs1, a->imm);
+    return true;
+}
+
+static bool trans_sb(DisasContext *ctx, arg_sb *a)
+{
+    gen_store(ctx, OPC_RISC_SB, a->rs1, a->rs2, a->imm);
+    return true;
+}
+
+static bool trans_sh(DisasContext *ctx, arg_sh *a)
+{
+    gen_store(ctx, OPC_RISC_SH, a->rs1, a->rs2, a->imm);
+    return true;
+}
+
+static bool trans_sw(DisasContext *ctx, arg_sw *a)
+{
+    gen_store(ctx, OPC_RISC_SW, a->rs1, a->rs2, a->imm);
+    return true;
+}