[v6,07/17] target/riscv: rvb: sign-extend instructions

Commit Message

Frank Chang May 5, 2021, 4:06 p.m. UTC

From: Kito Cheng <[e-mail]>

Signed-off-by: Kito Cheng <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Reviewed-by: Alistair Francis <[e-mail]>
Signed-off-by: Frank Chang <[e-mail]>
---
 target/riscv/insn32.decode              |  3 +++
 target/riscv/insn_trans/trans_rvb.c.inc | 12 ++++++++++++
 2 files changed, 15 insertions(+)

Patch

diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 81dfdfbafdc..93619846349 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -663,6 +663,9 @@  vamomaxud_v     11100 . . ..... ..... 111 ..... 0101111 @r_wdvm
 clz        011000 000000 ..... 001 ..... 0010011 @r2
 ctz        011000 000001 ..... 001 ..... 0010011 @r2
 cpop       011000 000010 ..... 001 ..... 0010011 @r2
+sext_b     011000 000100 ..... 001 ..... 0010011 @r2
+sext_h     011000 000101 ..... 001 ..... 0010011 @r2
+
 andn       0100000 .......... 111 ..... 0110011 @r
 orn        0100000 .......... 110 ..... 0110011 @r
 xnor       0100000 .......... 100 ..... 0110011 @r
diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc
index 5a4fc02f705..3d594e8cb40 100644
--- a/target/riscv/insn_trans/trans_rvb.c.inc
+++ b/target/riscv/insn_trans/trans_rvb.c.inc
@@ -95,6 +95,18 @@  static bool trans_maxu(DisasContext *ctx, arg_maxu *a)
     return gen_arith(ctx, a, tcg_gen_umax_tl);
 }
 
+static bool trans_sext_b(DisasContext *ctx, arg_sext_b *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+    return gen_unary(ctx, a, tcg_gen_ext8s_tl);
+}
+
+static bool trans_sext_h(DisasContext *ctx, arg_sext_h *a)
+{
+    REQUIRE_EXT(ctx, RVB);
+    return gen_unary(ctx, a, tcg_gen_ext16s_tl);
+}
+
 static bool trans_clzw(DisasContext *ctx, arg_clzw *a)
 {
     REQUIRE_64BIT(ctx);