[PATCH v4 04/17] target/riscv: separation of bitwise logic and aritmetic helpers

[Frédéric Pétrot]

Introduction of a gen_logic function for bitwise logic to implement
instructions in which not propagation of information occurs between bits and
use of this function on the bitwise instructions.

Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/riscv/translate.c                | 27 +++++++++++++++++++++++++
 target/riscv/insn_trans/trans_rvb.c.inc |  6 +++---
 target/riscv/insn_trans/trans_rvi.c.inc | 12 +++++------
 3 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index e10c8769b3..5c7971b189 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -376,6 +376,33 @@ static int ex_rvc_shifti(DisasContext *ctx, int imm)
 /* Include the auto-generated decoder for 32 bit insn */
 #include "decode-insn32.c.inc"
 
+static bool gen_logic_imm_fn(DisasContext *ctx, arg_i *a,
+                             void (*func)(TCGv, TCGv, target_long))
+{
+    TCGv dest = dest_gpr(ctx, a->rd);
+    TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE);
+
+    func(dest, src1, a->imm);
+
+    gen_set_gpr(ctx, a->rd, dest);
+
+    return true;
+}
+
+static bool gen_logic(DisasContext *ctx, arg_r *a, DisasExtend ext,
+                      void (*func)(TCGv, TCGv, TCGv))
+{
+    TCGv dest = dest_gpr(ctx, a->rd);
+    TCGv src1 = get_gpr(ctx, a->rs1, ext);
+    TCGv src2 = get_gpr(ctx, a->rs2, ext);
+
+    func(dest, src1, src2);
+
+    gen_set_gpr(ctx, a->rd, dest);
+
+    return true;
+}
+
 static bool gen_arith_imm_fn(DisasContext *ctx, arg_i *a, DisasExtend ext,
                              void (*func)(TCGv, TCGv, target_long))
 {
diff --git a/target/riscv/insn_trans/trans_rvb.c.inc 
b/target/riscv/insn_trans/trans_rvb.c.inc
index c8d31907c5..acdcfdb178 100644
--- a/target/riscv/insn_trans/trans_rvb.c.inc
+++ b/target/riscv/insn_trans/trans_rvb.c.inc
@@ -86,19 +86,19 @@ static bool trans_cpop(DisasContext *ctx, arg_cpop *a)
 static bool trans_andn(DisasContext *ctx, arg_andn *a)
 {
     REQUIRE_ZBB(ctx);
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_andc_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_andc_tl);
 }
 
 static bool trans_orn(DisasContext *ctx, arg_orn *a)
 {
     REQUIRE_ZBB(ctx);
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_orc_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_orc_tl);
 }
 
 static bool trans_xnor(DisasContext *ctx, arg_xnor *a)
 {
     REQUIRE_ZBB(ctx);
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_eqv_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_eqv_tl);
 }
 
 static bool trans_min(DisasContext *ctx, arg_min *a)
diff --git a/target/riscv/insn_trans/trans_rvi.c.inc 
b/target/riscv/insn_trans/trans_rvi.c.inc
index 91dc438a3a..fae82bd946 100644
--- a/target/riscv/insn_trans/trans_rvi.c.inc
+++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -250,17 +250,17 @@ static bool trans_sltiu(DisasContext *ctx, arg_sltiu *a)
 
 static bool trans_xori(DisasContext *ctx, arg_xori *a)
 {
-    return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_xori_tl);
+    return gen_logic_imm_fn(ctx, a, tcg_gen_xori_tl);
 }
 
 static bool trans_ori(DisasContext *ctx, arg_ori *a)
 {
-    return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_ori_tl);
+    return gen_logic_imm_fn(ctx, a, tcg_gen_ori_tl);
 }
 
 static bool trans_andi(DisasContext *ctx, arg_andi *a)
 {
-    return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_andi_tl);
+    return gen_logic_imm_fn(ctx, a, tcg_gen_andi_tl);
 }
 
 static bool trans_slli(DisasContext *ctx, arg_slli *a)
@@ -317,7 +317,7 @@ static bool trans_sltu(DisasContext *ctx, arg_sltu *a)
 
 static bool trans_xor(DisasContext *ctx, arg_xor *a)
 {
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_xor_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_xor_tl);
 }
 
 static bool trans_srl(DisasContext *ctx, arg_srl *a)
@@ -332,12 +332,12 @@ static bool trans_sra(DisasContext *ctx, arg_sra *a)
 
 static bool trans_or(DisasContext *ctx, arg_or *a)
 {
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_or_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_or_tl);
 }
 
 static bool trans_and(DisasContext *ctx, arg_and *a)
 {
-    return gen_arith(ctx, a, EXT_NONE, tcg_gen_and_tl);
+    return gen_logic(ctx, a, EXT_NONE, tcg_gen_and_tl);
 }
 
 static bool trans_addiw(DisasContext *ctx, arg_addiw *a)
-- 
2.33.0