From patchwork Fri May 17 10:21:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 1100946 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4554Nr2T7sz9sB3 for ; Fri, 17 May 2019 20:32:27 +1000 (AEST) Received: from localhost ([127.0.0.1]:45925 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hRaA5-0000oS-Br for incoming@patchwork.ozlabs.org; Fri, 17 May 2019 06:32:25 -0400 Received: from eggs.gnu.org ([209.51.188.92]:49435) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hRa6L-0006W1-Ua for qemu-devel@nongnu.org; Fri, 17 May 2019 06:28:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hRa24-0005MQ-5n for qemu-devel@nongnu.org; Fri, 17 May 2019 06:24:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32860) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hRa23-0005MH-UX; Fri, 17 May 2019 06:24:08 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3FB973086205; Fri, 17 May 2019 10:24:07 +0000 (UTC) Received: from t460s.redhat.com (unknown [10.36.118.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id BACA119732; Fri, 17 May 2019 10:24:05 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Fri, 17 May 2019 12:21:39 +0200 Message-Id: <20190517102145.21812-35-david@redhat.com> In-Reply-To: <20190517102145.21812-1-david@redhat.com> References: <20190517102145.21812-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 17 May 2019 10:24:07 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL SUBSYSTEM s390x 34/40] s390x/tcg: Implement VECTOR SUBTRACT COMPUTE BORROW INDICATION X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , David Hildenbrand , Cornelia Huck , Richard Henderson , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Let's keep it simple for now and handle 8/16 bit elements via helpers. Especially for 8/16, we could come up with some bit tricks. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/helper.h | 2 ++ target/s390x/insn-data.def | 2 ++ target/s390x/translate_vx.inc.c | 52 +++++++++++++++++++++++++++++++++ target/s390x/vec_int_helper.c | 16 ++++++++++ 4 files changed, 72 insertions(+) diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 0f411f2346..2cb1f369bd 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -207,6 +207,8 @@ DEF_HELPER_FLAGS_4(gvec_verim16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32) DEF_HELPER_FLAGS_4(gvec_vsl, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32) DEF_HELPER_FLAGS_4(gvec_vsra, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32) DEF_HELPER_FLAGS_4(gvec_vsrl, TCG_CALL_NO_RWG, void, ptr, cptr, i64, i32) +DEF_HELPER_FLAGS_4(gvec_vscbi8, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32) +DEF_HELPER_FLAGS_4(gvec_vscbi16, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32) #ifndef CONFIG_USER_ONLY DEF_HELPER_3(servc, i32, env, i64, i64) diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index 58a61f41ef..94de3c9c7d 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -1176,6 +1176,8 @@ F(0xe77d, VSRLB, VRR_c, V, 0, 0, 0, 0, vsrl, 0, IF_VEC) /* VECTOR SUBTRACT */ F(0xe7f7, VS, VRR_c, V, 0, 0, 0, 0, vs, 0, IF_VEC) +/* VECTOR SUBTRACT COMPUTE BORROW INDICATION */ + F(0xe7f5, VSCBI, VRR_c, V, 0, 0, 0, 0, vscbi, 0, IF_VEC) #ifndef CONFIG_USER_ONLY /* COMPARE AND SWAP AND PURGE */ diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.inc.c index 5f53ae7ec5..b7052f73f8 100644 --- a/target/s390x/translate_vx.inc.c +++ b/target/s390x/translate_vx.inc.c @@ -2140,3 +2140,55 @@ static DisasJumpType op_vs(DisasContext *s, DisasOps *o) get_field(s->fields, v3)); return DISAS_NEXT; } + +static void gen_scbi_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b) +{ + tcg_gen_setcond_i32(TCG_COND_LTU, d, a, b); +} + +static void gen_scbi_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b) +{ + tcg_gen_setcond_i64(TCG_COND_LTU, d, a, b); +} + +static void gen_scbi2_i64(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 al, + TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh) +{ + TCGv_i64 th = tcg_temp_new_i64(); + TCGv_i64 tl = tcg_temp_new_i64(); + TCGv_i64 zero = tcg_const_i64(0); + + tcg_gen_sub2_i64(tl, th, al, zero, bl, zero); + tcg_gen_andi_i64(th, th, 1); + tcg_gen_sub2_i64(tl, th, ah, zero, th, zero); + tcg_gen_sub2_i64(tl, th, tl, th, bh, zero); + tcg_gen_andi_i64(dl, th, 1); + tcg_gen_mov_i64(dh, zero); + + tcg_temp_free_i64(th); + tcg_temp_free_i64(tl); + tcg_temp_free_i64(zero); +} + +static DisasJumpType op_vscbi(DisasContext *s, DisasOps *o) +{ + const uint8_t es = get_field(s->fields, m4); + static const GVecGen3 g[4] = { + { .fno = gen_helper_gvec_vscbi8, }, + { .fno = gen_helper_gvec_vscbi16, }, + { .fni4 = gen_scbi_i32, }, + { .fni8 = gen_scbi_i64, }, + }; + + if (es > ES_128) { + gen_program_exception(s, PGM_SPECIFICATION); + return DISAS_NORETURN; + } else if (es == ES_128) { + gen_gvec128_3_i64(gen_scbi2_i64, get_field(s->fields, v1), + get_field(s->fields, v2), get_field(s->fields, v3)); + return DISAS_NEXT; + } + gen_gvec_3(get_field(s->fields, v1), get_field(s->fields, v2), + get_field(s->fields, v3), &g[es]); + return DISAS_NEXT; +} diff --git a/target/s390x/vec_int_helper.c b/target/s390x/vec_int_helper.c index 06f8bfa30d..09137dab99 100644 --- a/target/s390x/vec_int_helper.c +++ b/target/s390x/vec_int_helper.c @@ -567,3 +567,19 @@ void HELPER(gvec_vsrl)(void *v1, const void *v2, uint64_t count, { s390_vec_shr(v1, v2, count); } + +#define DEF_VSCBI(BITS) \ +void HELPER(gvec_vscbi##BITS)(void *v1, const void *v2, const void *v3, \ + uint32_t desc) \ +{ \ + int i; \ + \ + for (i = 0; i < (128 / BITS); i++) { \ + const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \ + const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \ + \ + s390_vec_write_element##BITS(v1, i, a < b); \ + } \ +} +DEF_VSCBI(8) +DEF_VSCBI(16)