[RFC PATCH 05/13] target/riscv: Support UXL32 for shift instruction

[LIU Zhiwei]

Reuse 32-bit right shift instructions.

Signed-off-by: LIU Zhiwei <zhiwei_...@c-sky.com>
---
 target/riscv/insn_trans/trans_rvi.c.inc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/target/riscv/insn_trans/trans_rvi.c.inc 
b/target/riscv/insn_trans/trans_rvi.c.inc
index 6201c07795..698a28731e 100644
--- a/target/riscv/insn_trans/trans_rvi.c.inc
+++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -303,11 +303,17 @@ static bool trans_slli(DisasContext *ctx, arg_slli *a)
 
 static bool trans_srli(DisasContext *ctx, arg_srli *a)
 {
+    if (ctx->uxl32) {
+        return trans_srliw(ctx, a);
+    }
     return gen_shifti(ctx, a, tcg_gen_shr_tl);
 }
 
 static bool trans_srai(DisasContext *ctx, arg_srai *a)
 {
+    if (ctx->uxl32) {
+        return trans_sraiw(ctx, a);
+    }
     return gen_shifti(ctx, a, tcg_gen_sar_tl);
 }
 
@@ -343,11 +349,17 @@ static bool trans_xor(DisasContext *ctx, arg_xor *a)
 
 static bool trans_srl(DisasContext *ctx, arg_srl *a)
 {
+    if (ctx->uxl32) {
+        return trans_srlw(ctx, a);
+    }
     return gen_shift(ctx, a, &tcg_gen_shr_tl);
 }
 
 static bool trans_sra(DisasContext *ctx, arg_sra *a)
 {
+    if (ctx->uxl32) {
+        return trans_sraw(ctx, a);
+    }
     return gen_shift(ctx, a, &tcg_gen_sar_tl);
 }
 
-- 
2.17.1