From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40071) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gB1Hr-0001xy-DD for qemu-devel@nongnu.org; Fri, 12 Oct 2018 13:31:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gB1Hq-0000SE-7a for qemu-devel@nongnu.org; Fri, 12 Oct 2018 13:31:43 -0400 Received: from mail.uni-paderborn.de ([131.234.142.9]:38646) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gB1Hp-0000FY-Pt for qemu-devel@nongnu.org; Fri, 12 Oct 2018 13:31:42 -0400 From: Bastian Koppelmann Date: Fri, 12 Oct 2018 19:30:43 +0200 Message-Id: <20181012173047.25420-25-kbastian@mail.uni-paderborn.de> In-Reply-To: <20181012173047.25420-1-kbastian@mail.uni-paderborn.de> References: <20181012173047.25420-1-kbastian@mail.uni-paderborn.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH 24/28] target/riscv: Remove shift and slt insn manual decoding List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: mjc@sifive.com, palmer@sifive.com, sagark@eecs.berkeley.edu, kbastian@mail.uni-paderborn.de Cc: qemu-devel@nongnu.org, peer.adelt@hni.uni-paderborn.de, Alistair.Francis@wdc.com Signed-off-by: Bastian Koppelmann Signed-off-by: Peer Adelt --- target/riscv/insn_trans/trans_rvi.inc.c | 79 +++++++++++++++++++++---- target/riscv/translate.c | 59 ++++++------------ 2 files changed, 86 insertions(+), 52 deletions(-) diff --git a/target/riscv/insn_trans/trans_rvi.inc.c b/target/riscv/insn_trans/trans_rvi.inc.c index cb0c6263bd..b84a2e018b 100644 --- a/target/riscv/insn_trans/trans_rvi.inc.c +++ b/target/riscv/insn_trans/trans_rvi.inc.c @@ -333,19 +333,39 @@ static bool trans_sub(DisasContext *ctx, arg_sub *a, uint32_t insn) static bool trans_sll(DisasContext *ctx, arg_sll *a, uint32_t insn) { - gen_arith(ctx, OPC_RISC_SLL, a->rd, a->rs1, a->rs2); - return true; + + return trans_shift(ctx, a, &tcg_gen_shl_tl); } static bool trans_slt(DisasContext *ctx, arg_slt *a, uint32_t insn) { - gen_arith(ctx, OPC_RISC_SLT, a->rd, a->rs1, a->rs2); + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + tcg_gen_setcond_tl(TCG_COND_LT, source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); return true; } static bool trans_sltu(DisasContext *ctx, arg_sltu *a, uint32_t insn) { - gen_arith(ctx, OPC_RISC_SLTU, a->rd, a->rs1, a->rs2); + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + tcg_gen_setcond_tl(TCG_COND_LTU, source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); return true; } @@ -354,16 +374,15 @@ static bool trans_xor(DisasContext *ctx, arg_xor *a, uint32_t insn) return trans_arith(ctx, a, &tcg_gen_xor_tl); } + static bool trans_srl(DisasContext *ctx, arg_srl *a, uint32_t insn) { - gen_arith(ctx, OPC_RISC_SRL, a->rd, a->rs1, a->rs2); - return true; + return trans_shift(ctx, a, &tcg_gen_shr_tl); } static bool trans_sra(DisasContext *ctx, arg_sra *a, uint32_t insn) { - gen_arith(ctx, OPC_RISC_SRA, a->rd, a->rs1, a->rs2); - return true; + return trans_shift(ctx, a, &tcg_gen_sar_tl); } static bool trans_or(DisasContext *ctx, arg_or *a, uint32_t insn) @@ -449,7 +468,18 @@ static bool trans_sllw(DisasContext *ctx, arg_sllw *a, uint32_t insn) gen_exception_illegal(ctx); return true; #endif - gen_arith(ctx, OPC_RISC_SLLW, a->rd, a->rs1, a->rs2); + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + tcg_gen_andi_tl(source2, source2, 0x1F); + tcg_gen_shl_tl(source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); return true; } @@ -459,7 +489,20 @@ static bool trans_srlw(DisasContext *ctx, arg_srlw *a, uint32_t insn) gen_exception_illegal(ctx); return true; #endif - gen_arith(ctx, OPC_RISC_SRLW, a->rd, a->rs1, a->rs2); + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + /* clear upper 32 */ + tcg_gen_ext32u_tl(source1, source1); + tcg_gen_andi_tl(source2, source2, 0x1F); + tcg_gen_shr_tl(source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); return true; } @@ -469,7 +512,21 @@ static bool trans_sraw(DisasContext *ctx, arg_sraw *a, uint32_t insn) gen_exception_illegal(ctx); return true; #endif - gen_arith(ctx, OPC_RISC_SRAW, a->rd, a->rs1, a->rs2); + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + /* first, trick to get it to act like working on 32 bits (get rid of + upper 32, sign extend to fill space) */ + tcg_gen_ext32s_tl(source1, source1); + tcg_gen_andi_tl(source2, source2, 0x1F); + tcg_gen_sar_tl(source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); return true; } diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 92aa4641b0..047f64c6f2 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -175,47 +175,6 @@ static void gen_arith(DisasContext *ctx, uint32_t opc, int rd, int rs1, gen_get_gpr(source2, rs2); switch (opc) { -#if defined(TARGET_RISCV64) - case OPC_RISC_SLLW: - tcg_gen_andi_tl(source2, source2, 0x1F); - tcg_gen_shl_tl(source1, source1, source2); - break; -#endif - case OPC_RISC_SLL: - tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1); - tcg_gen_shl_tl(source1, source1, source2); - break; - case OPC_RISC_SLT: - tcg_gen_setcond_tl(TCG_COND_LT, source1, source1, source2); - break; - case OPC_RISC_SLTU: - tcg_gen_setcond_tl(TCG_COND_LTU, source1, source1, source2); - break; -#if defined(TARGET_RISCV64) - case OPC_RISC_SRLW: - /* clear upper 32 */ - tcg_gen_ext32u_tl(source1, source1); - tcg_gen_andi_tl(source2, source2, 0x1F); - tcg_gen_shr_tl(source1, source1, source2); - break; -#endif - case OPC_RISC_SRL: - tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1); - tcg_gen_shr_tl(source1, source1, source2); - break; -#if defined(TARGET_RISCV64) - case OPC_RISC_SRAW: - /* first, trick to get it to act like working on 32 bits (get rid of - upper 32, sign extend to fill space) */ - tcg_gen_ext32s_tl(source1, source1); - tcg_gen_andi_tl(source2, source2, 0x1F); - tcg_gen_sar_tl(source1, source1, source2); - break; -#endif - case OPC_RISC_SRA: - tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1); - tcg_gen_sar_tl(source1, source1, source2); - break; CASE_OP_32_64(OPC_RISC_MUL): tcg_gen_mul_tl(source1, source1, source2); break; @@ -476,6 +435,24 @@ static bool trans_arith(DisasContext *ctx, arg_arith *a, return true; } +static bool trans_shift(DisasContext *ctx, arg_arith *a, + void(*func)(TCGv, TCGv, TCGv)) +{ + TCGv source1 = tcg_temp_new(); + TCGv source2 = tcg_temp_new(); + + gen_get_gpr(source1, a->rs1); + gen_get_gpr(source2, a->rs2); + + tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1); + (*func)(source1, source1, source2); + + gen_set_gpr(a->rd, source1); + tcg_temp_free(source1); + tcg_temp_free(source2); + return true; +} + /* Include insn module translation function */ #include "insn_trans/trans_rvi.inc.c" #include "insn_trans/trans_rvm.inc.c" -- 2.19.1