target/riscv: Add DisasExtend to gen_unary

Use ctx->w for ctpopw, which is the only one that can
re-use the generic algorithm for the narrow operation.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210823195529.560295-12-richard.henderson@linaro.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

2 files changed, 15 insertions, 23 deletions

diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc
index 73f088b..e255678 100644
--- a/target/riscv/insn_trans/trans_rvb.c.inc
+++ b/target/riscv/insn_trans/trans_rvb.c.inc
@@ -26,7 +26,7 @@ static void gen_clz(TCGv ret, TCGv arg1)
 static bool trans_clz(DisasContext *ctx, arg_clz *a)
 {
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, gen_clz);
+    return gen_unary(ctx, a, EXT_ZERO, gen_clz);
 }
 
 static void gen_ctz(TCGv ret, TCGv arg1)
@@ -37,13 +37,13 @@ static void gen_ctz(TCGv ret, TCGv arg1)
 static bool trans_ctz(DisasContext *ctx, arg_ctz *a)
 {
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, gen_ctz);
+    return gen_unary(ctx, a, EXT_ZERO, gen_ctz);
 }
 
 static bool trans_cpop(DisasContext *ctx, arg_cpop *a)
 {
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, tcg_gen_ctpop_tl);
+    return gen_unary(ctx, a, EXT_ZERO, tcg_gen_ctpop_tl);
 }
 
 static bool trans_andn(DisasContext *ctx, arg_andn *a)
@@ -132,13 +132,13 @@ static bool trans_maxu(DisasContext *ctx, arg_maxu *a)
 static bool trans_sext_b(DisasContext *ctx, arg_sext_b *a)
 {
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, tcg_gen_ext8s_tl);
+    return gen_unary(ctx, a, EXT_NONE, 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);
+    return gen_unary(ctx, a, EXT_NONE, tcg_gen_ext16s_tl);
 }
 
 static void gen_sbop_mask(TCGv ret, TCGv shamt)
@@ -366,7 +366,6 @@ GEN_TRANS_SHADD(3)
 
 static void gen_clzw(TCGv ret, TCGv arg1)
 {
-    tcg_gen_ext32u_tl(ret, arg1);
     tcg_gen_clzi_tl(ret, ret, 64);
     tcg_gen_subi_tl(ret, ret, 32);
 }
@@ -375,7 +374,7 @@ static bool trans_clzw(DisasContext *ctx, arg_clzw *a)
 {
     REQUIRE_64BIT(ctx);
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, gen_clzw);
+    return gen_unary(ctx, a, EXT_ZERO, gen_clzw);
 }
 
 static void gen_ctzw(TCGv ret, TCGv arg1)
@@ -388,20 +387,15 @@ static bool trans_ctzw(DisasContext *ctx, arg_ctzw *a)
 {
     REQUIRE_64BIT(ctx);
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, gen_ctzw);
-}
-
-static void gen_cpopw(TCGv ret, TCGv arg1)
-{
-    tcg_gen_ext32u_tl(arg1, arg1);
-    tcg_gen_ctpop_tl(ret, arg1);
+    return gen_unary(ctx, a, EXT_NONE, gen_ctzw);
 }
 
 static bool trans_cpopw(DisasContext *ctx, arg_cpopw *a)
 {
     REQUIRE_64BIT(ctx);
     REQUIRE_EXT(ctx, RVB);
-    return gen_unary(ctx, a, gen_cpopw);
+    ctx->w = true;
+    return gen_unary(ctx, a, EXT_ZERO, tcg_gen_ctpop_tl);
 }
 
 static void gen_packw(TCGv ret, TCGv arg1, TCGv arg2)
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 0985353..785e9e58 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -478,17 +478,15 @@ static bool gen_shiftiw(DisasContext *ctx, arg_shift *a,
     return true;
 }
 
-static bool gen_unary(DisasContext *ctx, arg_r2 *a,
-                      void(*func)(TCGv, TCGv))
+static bool gen_unary(DisasContext *ctx, arg_r2 *a, DisasExtend ext,
+                      void (*func)(TCGv, TCGv))
 {
-    TCGv source = tcg_temp_new();
-
-    gen_get_gpr(ctx, source, a->rs1);
+    TCGv dest = dest_gpr(ctx, a->rd);
+    TCGv src1 = get_gpr(ctx, a->rs1, ext);
 
-    (*func)(source, source);
+    func(dest, src1);
 
-    gen_set_gpr(ctx, a->rd, source);
-    tcg_temp_free(source);
+    gen_set_gpr(ctx, a->rd, dest);
     return true;
 }