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(unknown [166.111.226.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) (Authenticated sender: c@jia.je) by hognose1.porkbun.com (Postfix) with ESMTPSA id 1793C43F3A; Tue, 8 Aug 2023 01:55:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jia.je; s=default; t=1691459761; bh=92LdaPRkiGB8Gjinlv8Hz+Leorky8vF713jZUnMgmFk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=g4WQy4devvhF+ab0svDpQHxdv+70dBqfxFN+XbnsA8+PBIQw4NsTjh2DnZJUSdRsF pdxskMK832fTHywy1WG2A0LonVAS3NHcPAk8N1UiZnxcnMh8UoPYnV4DDDw7nDJDF7 yXAC0i93/a6KShrZKwhYXb9nrQVhxQKuL0frJtyE= From: Jiajie Chen To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, yijun@loongson.cn, shenjinyang@loongson.cn, gaosong@loongson.cn, i.qemu@xen0n.name, Jiajie Chen Subject: [PATCH v4 10/11] target/loongarch: Sign extend results in VA32 mode Date: Tue, 8 Aug 2023 09:54:36 +0800 Message-ID: <20230808015506.1705140-11-c@jia.je> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230808015506.1705140-1-c@jia.je> References: <20230808015506.1705140-1-c@jia.je> MIME-Version: 1.0 Received-SPF: pass client-ip=35.82.102.206; envelope-from=c@jia.je; helo=hognose1.porkbun.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org In VA32 mode, BL, JIRL and PC* instructions should sign-extend the low 32 bit result to 64 bits. Signed-off-by: Jiajie Chen --- target/loongarch/insn_trans/trans_arith.c.inc | 2 +- target/loongarch/insn_trans/trans_branch.c.inc | 5 +++-- target/loongarch/translate.c | 13 +++++++++++++ 3 files changed, 17 insertions(+), 3 deletions(-) diff --git a/target/loongarch/insn_trans/trans_arith.c.inc b/target/loongarch/insn_trans/trans_arith.c.inc index e6d218e84a..39915f228d 100644 --- a/target/loongarch/insn_trans/trans_arith.c.inc +++ b/target/loongarch/insn_trans/trans_arith.c.inc @@ -72,7 +72,7 @@ static bool gen_pc(DisasContext *ctx, arg_r_i *a, target_ulong (*func)(target_ulong, int)) { TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE); - target_ulong addr = func(ctx->base.pc_next, a->imm); + target_ulong addr = va32_result(ctx, func(ctx->base.pc_next, a->imm)); tcg_gen_movi_tl(dest, addr); gen_set_gpr(a->rd, dest, EXT_NONE); diff --git a/target/loongarch/insn_trans/trans_branch.c.inc b/target/loongarch/insn_trans/trans_branch.c.inc index 29b81a9843..41f0bfd489 100644 --- a/target/loongarch/insn_trans/trans_branch.c.inc +++ b/target/loongarch/insn_trans/trans_branch.c.inc @@ -12,7 +12,7 @@ static bool trans_b(DisasContext *ctx, arg_b *a) static bool trans_bl(DisasContext *ctx, arg_bl *a) { - tcg_gen_movi_tl(cpu_gpr[1], ctx->base.pc_next + 4); + tcg_gen_movi_tl(cpu_gpr[1], va32_result(ctx, ctx->base.pc_next + 4)); gen_goto_tb(ctx, 0, ctx->base.pc_next + a->offs); ctx->base.is_jmp = DISAS_NORETURN; return true; @@ -24,7 +24,8 @@ static bool trans_jirl(DisasContext *ctx, arg_jirl *a) TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE); tcg_gen_addi_tl(cpu_pc, src1, a->imm); - tcg_gen_movi_tl(dest, ctx->base.pc_next + 4); + tcg_gen_movi_tl(dest, va32_result(ctx, ctx->base.pc_next + 4)); + gen_set_gpr(a->rd, dest, EXT_NONE); tcg_gen_lookup_and_goto_ptr(); ctx->base.is_jmp = DISAS_NORETURN; diff --git a/target/loongarch/translate.c b/target/loongarch/translate.c index 9cd2f13778..9703fc46a6 100644 --- a/target/loongarch/translate.c +++ b/target/loongarch/translate.c @@ -218,6 +218,19 @@ static TCGv va32_address(DisasContext *ctx, TCGv addr) return addr; } +static uint64_t sign_extend32(uint64_t data) +{ + return (data & 0x7FFFFFFF) - (data & 0x80000000); +} + +static uint64_t va32_result(DisasContext *ctx, uint64_t addr) +{ + if (ctx->va32) { + addr = sign_extend32(addr); + } + return addr; +} + #include "decode-insns.c.inc" #include "insn_trans/trans_arith.c.inc" #include "insn_trans/trans_shift.c.inc"