[Qemu-riscv] [PULL 10/29] target/riscv: Split gen_arith_imm into functional and temp

[Palmer Dabbelt]

From: Richard Henderson <address@hidden>

The tcg_gen_fooi_tl functions have some immediate constant
folding built in, which match up with some of the riscv asm
builtin macros, like mv and not.

Signed-off-by: Richard Henderson <address@hidden>
Reviewed-by: Palmer Dabbelt <address@hidden>
Signed-off-by: Palmer Dabbelt <address@hidden>
---
 target/riscv/insn_trans/trans_rvi.inc.c | 14 +++++++-------
 target/riscv/translate.c                | 19 +++++++++++++++++--
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvi.inc.c 
b/target/riscv/insn_trans/trans_rvi.inc.c
index b5a5b4a199f8..6cda078ed6ba 100644
--- a/target/riscv/insn_trans/trans_rvi.inc.c
+++ b/target/riscv/insn_trans/trans_rvi.inc.c
@@ -223,7 +223,7 @@ static bool trans_sd(DisasContext *ctx, arg_sd *a)
 
 static bool trans_addi(DisasContext *ctx, arg_addi *a)
 {
-    return gen_arith_imm(ctx, a, &tcg_gen_add_tl);
+    return gen_arith_imm_fn(ctx, a, &tcg_gen_addi_tl);
 }
 
 static void gen_slt(TCGv ret, TCGv s1, TCGv s2)
@@ -239,25 +239,25 @@ static void gen_sltu(TCGv ret, TCGv s1, TCGv s2)
 
 static bool trans_slti(DisasContext *ctx, arg_slti *a)
 {
-    return gen_arith_imm(ctx, a, &gen_slt);
+    return gen_arith_imm_tl(ctx, a, &gen_slt);
 }
 
 static bool trans_sltiu(DisasContext *ctx, arg_sltiu *a)
 {
-    return gen_arith_imm(ctx, a, &gen_sltu);
+    return gen_arith_imm_tl(ctx, a, &gen_sltu);
 }
 
 static bool trans_xori(DisasContext *ctx, arg_xori *a)
 {
-    return gen_arith_imm(ctx, a, &tcg_gen_xor_tl);
+    return gen_arith_imm_fn(ctx, a, &tcg_gen_xori_tl);
 }
 static bool trans_ori(DisasContext *ctx, arg_ori *a)
 {
-    return gen_arith_imm(ctx, a, &tcg_gen_or_tl);
+    return gen_arith_imm_fn(ctx, a, &tcg_gen_ori_tl);
 }
 static bool trans_andi(DisasContext *ctx, arg_andi *a)
 {
-    return gen_arith_imm(ctx, a, &tcg_gen_and_tl);
+    return gen_arith_imm_fn(ctx, a, &tcg_gen_andi_tl);
 }
 static bool trans_slli(DisasContext *ctx, arg_slli *a)
 {
@@ -364,7 +364,7 @@ static bool trans_and(DisasContext *ctx, arg_and *a)
 #ifdef TARGET_RISCV64
 static bool trans_addiw(DisasContext *ctx, arg_addiw *a)
 {
-    return gen_arith_imm(ctx, a, &gen_addw);
+    return gen_arith_imm_tl(ctx, a, &gen_addw);
 }
 
 static bool trans_slliw(DisasContext *ctx, arg_slliw *a)
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 8b37e0928f50..313c27b70073 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -567,8 +567,23 @@ static int ex_rvc_shifti(DisasContext *ctx, int imm)
 /* Include the auto-generated decoder for 32 bit insn */
 #include "decode_insn32.inc.c"
 
-static bool gen_arith_imm(DisasContext *ctx, arg_i *a,
-                          void(*func)(TCGv, TCGv, TCGv))
+static bool gen_arith_imm_fn(DisasContext *ctx, arg_i *a,
+                             void (*func)(TCGv, TCGv, target_long))
+{
+    TCGv source1;
+    source1 = tcg_temp_new();
+
+    gen_get_gpr(source1, a->rs1);
+
+    (*func)(source1, source1, a->imm);
+
+    gen_set_gpr(a->rd, source1);
+    tcg_temp_free(source1);
+    return true;
+}
+
+static bool gen_arith_imm_tl(DisasContext *ctx, arg_i *a,
+                             void (*func)(TCGv, TCGv, TCGv))
 {
     TCGv source1, source2;
     source1 = tcg_temp_new();
-- 
2.21.0