From a1a3aac448cced3161cd0c8a49ac24cd5d58fe14 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20P=C3=A9trot?= Date: Thu, 6 Jan 2022 22:00:55 +0100 Subject: [PATCH] target/riscv: separation of bitwise logic and arithmetic helpers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Introduction of a gen_logic function for bitwise logic to implement instructions in which no propagation of information occurs between bits and use of this function on the bitwise instructions. Signed-off-by: Frédéric Pétrot Co-authored-by: Fabien Portas Reviewed-by: Richard Henderson Reviewed-by: Alistair Francis Message-id: 20220106210108.138226-6-frederic.petrot@univ-grenoble-alpes.fr Signed-off-by: Alistair Francis --- target/riscv/insn_trans/trans_rvb.c.inc | 6 +++--- target/riscv/insn_trans/trans_rvi.c.inc | 12 +++++------ target/riscv/translate.c | 27 +++++++++++++++++++++++++ 3 files changed, 36 insertions(+), 9 deletions(-) diff --git a/target/riscv/insn_trans/trans_rvb.c.inc b/target/riscv/insn_trans/trans_rvb.c.inc index c8d31907c5..de2cd613b1 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, 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, 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, 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 4a2aefe3a5..51607b3d40 100644 --- a/target/riscv/insn_trans/trans_rvi.c.inc +++ b/target/riscv/insn_trans/trans_rvi.c.inc @@ -252,17 +252,17 @@ 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) @@ -319,7 +319,7 @@ 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, tcg_gen_xor_tl); } static bool trans_srl(DisasContext *ctx, arg_srl *a) @@ -334,12 +334,12 @@ 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, 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, tcg_gen_and_tl); } static bool trans_addiw(DisasContext *ctx, arg_addiw *a) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 502bf0d009..c3b4950ad0 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -475,6 +475,33 @@ 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, + void (*func)(TCGv, TCGv, TCGv)) +{ + TCGv dest = dest_gpr(ctx, a->rd); + TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE); + TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE); + + 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)) {