From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9ABA9C433B4 for ; Fri, 9 Apr 2021 01:10:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 427C6610A7 for ; Fri, 9 Apr 2021 01:10:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 427C6610A7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=quicinc.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40932 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUffd-00010C-82 for qemu-devel@archiver.kernel.org; Thu, 08 Apr 2021 21:10:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52648) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUfcy-0005kh-0S for qemu-devel@nongnu.org; Thu, 08 Apr 2021 21:08:04 -0400 Received: from alexa-out-sd-02.qualcomm.com ([199.106.114.39]:6254) by eggs.gnu.org with esmtps (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lUfct-0001Cp-FN for qemu-devel@nongnu.org; Thu, 08 Apr 2021 21:08:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1617930479; x=1649466479; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=rF1LyBcQY5mZn57QEzE60g0in08h1M+AwzZmnGg9o6k=; b=MfBA70UQQuvnAvXabN8cOL/fQJs0sE/JJfPfuhcKEUsrqM0TUxa88Ikl xH98s2lQmUx7X5PFG8kVosAZ3rKVkUQ9Wy/PAjhUMB9tTTBFg1MGl3dKI zBYMhh8kOmlxM9/UUcbwytSAdkbeQuKFwbBfcuXb+KDvxkIfiB0gqAJCW Y=; Received: from unknown (HELO ironmsg03-sd.qualcomm.com) ([10.53.140.143]) by alexa-out-sd-02.qualcomm.com with ESMTP; 08 Apr 2021 18:07:57 -0700 X-QCInternal: smtphost Received: from vu-tsimpson-aus.qualcomm.com (HELO vu-tsimpson1-aus.qualcomm.com) ([10.222.150.1]) by ironmsg03-sd.qualcomm.com with ESMTP; 08 Apr 2021 18:07:56 -0700 Received: by vu-tsimpson1-aus.qualcomm.com (Postfix, from userid 47164) id 4B3B8FA0; Thu, 8 Apr 2021 20:07:56 -0500 (CDT) From: Taylor Simpson To: qemu-devel@nongnu.org Subject: [PATCH v4 06/26] Hexagon (target/hexagon) decide if pred has been written at TCG gen time Date: Thu, 8 Apr 2021 20:07:34 -0500 Message-Id: <1617930474-31979-7-git-send-email-tsimpson@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1617930474-31979-1-git-send-email-tsimpson@quicinc.com> References: <1617930474-31979-1-git-send-email-tsimpson@quicinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=199.106.114.39; envelope-from=tsimpson@qualcomm.com; helo=alexa-out-sd-02.qualcomm.com X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ale@rev.ng, philmd@redhat.com, tsimpson@quicinc.com, richard.henderson@linaro.org, bcain@quicinc.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Multiple writes to the same preg are and'ed together. Rather than generating a runtime check, we can determine at TCG generation time if the predicate has previously been written in the packet. Test added to tests/tcg/hexagon/misc.c Suggested-by: Richard Henderson Reviewed-by: Richard Henderson Signed-off-by: Taylor Simpson --- target/hexagon/gen_tcg_funcs.py | 2 +- target/hexagon/genptr.c | 22 +++++++++++++++------- target/hexagon/translate.c | 9 +++++++-- target/hexagon/translate.h | 2 ++ tests/tcg/hexagon/misc.c | 19 +++++++++++++++++++ 5 files changed, 44 insertions(+), 10 deletions(-) diff --git a/target/hexagon/gen_tcg_funcs.py b/target/hexagon/gen_tcg_funcs.py index db9f663..7ceb25b 100755 --- a/target/hexagon/gen_tcg_funcs.py +++ b/target/hexagon/gen_tcg_funcs.py @@ -316,7 +316,7 @@ def genptr_dst_write(f, tag, regtype, regid): print("Bad register parse: ", regtype, regid) elif (regtype == "P"): if (regid in {"d", "e", "x"}): - f.write(" gen_log_pred_write(%s%sN, %s%sV);\n" % \ + f.write(" gen_log_pred_write(ctx, %s%sN, %s%sV);\n" % \ (regtype, regid, regtype, regid)) f.write(" ctx_log_pred_write(ctx, %s%sN);\n" % \ (regtype, regid)) diff --git a/target/hexagon/genptr.c b/target/hexagon/genptr.c index 07d970f..6b74344 100644 --- a/target/hexagon/genptr.c +++ b/target/hexagon/genptr.c @@ -119,20 +119,28 @@ static void gen_log_reg_write_pair(int rnum, TCGv_i64 val) #endif } -static inline void gen_log_pred_write(int pnum, TCGv val) +static inline void gen_log_pred_write(DisasContext *ctx, int pnum, TCGv val) { TCGv zero = tcg_const_tl(0); TCGv base_val = tcg_temp_new(); TCGv and_val = tcg_temp_new(); TCGv pred_written = tcg_temp_new(); - /* Multiple writes to the same preg are and'ed together */ tcg_gen_andi_tl(base_val, val, 0xff); - tcg_gen_and_tl(and_val, base_val, hex_new_pred_value[pnum]); - tcg_gen_andi_tl(pred_written, hex_pred_written, 1 << pnum); - tcg_gen_movcond_tl(TCG_COND_NE, hex_new_pred_value[pnum], - pred_written, zero, - and_val, base_val); + + /* + * Section 6.1.3 of the Hexagon V67 Programmer's Reference Manual + * + * Multiple writes to the same preg are and'ed together + * If this is the first predicate write in the packet, do a + * straight assignment. Otherwise, do an and. + */ + if (!test_bit(pnum, ctx->pregs_written)) { + tcg_gen_mov_tl(hex_new_pred_value[pnum], base_val); + } else { + tcg_gen_and_tl(hex_new_pred_value[pnum], + hex_new_pred_value[pnum], base_val); + } tcg_gen_ori_tl(hex_pred_written, hex_pred_written, 1 << pnum); tcg_temp_free(zero); diff --git a/target/hexagon/translate.c b/target/hexagon/translate.c index 9f2a531..49ec8b7 100644 --- a/target/hexagon/translate.c +++ b/target/hexagon/translate.c @@ -172,6 +172,7 @@ static void gen_start_packet(DisasContext *ctx, Packet *pkt) ctx->reg_log_idx = 0; bitmap_zero(ctx->regs_written, TOTAL_PER_THREAD_REGS); ctx->preg_log_idx = 0; + bitmap_zero(ctx->pregs_written, NUM_PREGS); for (i = 0; i < STORES_MAX; i++) { ctx->store_width[i] = 0; } @@ -226,7 +227,7 @@ static void mark_implicit_pred_write(DisasContext *ctx, Insn *insn, } } -static void mark_implicit_writes(DisasContext *ctx, Insn *insn) +static void mark_implicit_reg_writes(DisasContext *ctx, Insn *insn) { mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_FP, HEX_REG_FP); mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_SP, HEX_REG_SP); @@ -235,7 +236,10 @@ static void mark_implicit_writes(DisasContext *ctx, Insn *insn) mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_SA0, HEX_REG_SA0); mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_LC1, HEX_REG_LC1); mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_SA1, HEX_REG_SA1); +} +static void mark_implicit_pred_writes(DisasContext *ctx, Insn *insn) +{ mark_implicit_pred_write(ctx, insn, A_IMPLICIT_WRITES_P0, 0); mark_implicit_pred_write(ctx, insn, A_IMPLICIT_WRITES_P1, 1); mark_implicit_pred_write(ctx, insn, A_IMPLICIT_WRITES_P2, 2); @@ -246,8 +250,9 @@ static void gen_insn(CPUHexagonState *env, DisasContext *ctx, Insn *insn, Packet *pkt) { if (insn->generate) { - mark_implicit_writes(ctx, insn); + mark_implicit_reg_writes(ctx, insn); insn->generate(env, ctx, insn, pkt); + mark_implicit_pred_writes(ctx, insn); } else { gen_exception_end_tb(ctx, HEX_EXCP_INVALID_OPCODE); } diff --git a/target/hexagon/translate.h b/target/hexagon/translate.h index 12506c8..0ecfbd7 100644 --- a/target/hexagon/translate.h +++ b/target/hexagon/translate.h @@ -34,6 +34,7 @@ typedef struct DisasContext { DECLARE_BITMAP(regs_written, TOTAL_PER_THREAD_REGS); int preg_log[PRED_WRITES_MAX]; int preg_log_idx; + DECLARE_BITMAP(pregs_written, NUM_PREGS); uint8_t store_width[STORES_MAX]; uint8_t s1_store_processed; } DisasContext; @@ -60,6 +61,7 @@ static inline void ctx_log_pred_write(DisasContext *ctx, int pnum) { ctx->preg_log[ctx->preg_log_idx] = pnum; ctx->preg_log_idx++; + set_bit(pnum, ctx->pregs_written); } static inline bool is_preloaded(DisasContext *ctx, int num) diff --git a/tests/tcg/hexagon/misc.c b/tests/tcg/hexagon/misc.c index 458759f..e5d78b4 100644 --- a/tests/tcg/hexagon/misc.c +++ b/tests/tcg/hexagon/misc.c @@ -264,6 +264,22 @@ static long long creg_pair(int x, int y) return retval; } +/* Check that predicates are auto-and'ed in a packet */ +static int auto_and(void) +{ + int retval; + asm ("r5 = #1\n\t" + "{\n\t" + " p0 = cmp.eq(r1, #1)\n\t" + " p0 = cmp.eq(r1, #2)\n\t" + "}\n\t" + "%0 = p0\n\t" + : "=r"(retval) + : + : "r5", "p0"); + return retval; +} + int main() { @@ -375,6 +391,9 @@ int main() res = test_clrtnew(2, 7); check(res, 7); + res = auto_and(); + check(res, 0); + puts(err ? "FAIL" : "PASS"); return err; } -- 2.7.4