From patchwork Fri Apr 16 23:59:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1467448 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) 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; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=ordiiuDT; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4FMYHX2Lxbz9sTD for ; Sat, 17 Apr 2021 10:05:10 +1000 (AEST) Received: from localhost ([::1]:45198 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXYSR-0004yn-GV for incoming@patchwork.ozlabs.org; Fri, 16 Apr 2021 20:05:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42042) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXYN9-0005Hu-BS for qemu-devel@nongnu.org; Fri, 16 Apr 2021 19:59:39 -0400 Received: from mail-pf1-x42a.google.com ([2607:f8b0:4864:20::42a]:37711) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lXYN5-0005cf-IA for qemu-devel@nongnu.org; Fri, 16 Apr 2021 19:59:39 -0400 Received: by mail-pf1-x42a.google.com with SMTP id o123so19363735pfb.4 for ; Fri, 16 Apr 2021 16:59:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DIH2aCJSKpFkJSYIcY5Sz/FYdp4UfedtSiKpRThzUXc=; b=ordiiuDTo0r+G4KqvQQ+tSQxEsOe73DDWs9TdVCyyhY7pL++mkxu6+/QBsVscmMebo qRJTxTABedrZDWjjb8g3nwY3/faKMrsRMAEw7Cgk2FIO4Y3e4b+Ekc6M4Scg9THo12rj q2Pmt6dENOxzxVlNn81dg46ZMVy38WAZkiPZelPiGWocO5kl4WUrb48zv6RT5jxWo28z 4OLOzu3WIAWM0TO0J4sgpd/tKpyZ/ibxe5V3j0HjJdXSRy59EZVNAz7SlJYSrZRRfmi2 8BjRFM0/2grpMXQ5oUH0KUR9dNoq8CM5qW9IeN+3NO+7o3DY4fkDrtd04UVYhCGx1yPD SNWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DIH2aCJSKpFkJSYIcY5Sz/FYdp4UfedtSiKpRThzUXc=; b=m7FO6OyLPXd3vr6lDJvGqFHDWmzuqCurO1xzfSNK8nG7RxDl9FtGMYdGLRUbWSOsl3 oCPtFnJ8upM5/oUxWVnG9DxhbU6PTSrXuYZzjSQzGEYkriJBf1j5tRKZNeURLWi+Kxxr nOpRtaXkiVviNiQdxspLDvsg9BX+bzGTFmwvZ4hF6pWLgHBLYFMFUkLh/ZxmrfzS4J8k hEOMNNjbor2V2UvNPWKkdE2ljMjBtV6ddxUjhc7T3eoq22bsqc2Fcr52Fa+yV0h0ZNIX Hy0Y4tLLOlrL8B/H9jrixSssD7rVtnoqL/OrsMRN/8hR5wBpbpobkFfqvhPo7xxgljQm b5fA== X-Gm-Message-State: AOAM531/diAwxhxW6koh4dLQo0ghese/yEa89FHE07JXg8kzCnuHteEk WdCF9X3XldsGRVGxTzXCAlvdMRqrCvEvxg== X-Google-Smtp-Source: ABdhPJzm7NoPxtCZGyTUMaKaUkewcUOUUYhBfK6DMeWLcoDmLtuZigokRp6BRp5jhR0J6/gJKOKbHA== X-Received: by 2002:a62:d10c:0:b029:23e:7499:b74b with SMTP id z12-20020a62d10c0000b029023e7499b74bmr10178087pfg.46.1618617574159; Fri, 16 Apr 2021 16:59:34 -0700 (PDT) Received: from localhost.localdomain ([71.212.131.83]) by smtp.gmail.com with ESMTPSA id d71sm560853pfd.83.2021.04.16.16.59.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Apr 2021 16:59:33 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v1 04/11] target/arm: Implement vector float32 to bfloat16 conversion Date: Fri, 16 Apr 2021 16:59:21 -0700 Message-Id: <20210416235928.1631788-5-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210416235928.1631788-1-richard.henderson@linaro.org> References: <20210416235928.1631788-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42a; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42a.google.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This is BFCVT{N,T} for both AArch64 AdvSIMD and SVE, and VCVT.BF16.F32 for AArch32 NEON. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/helper-sve.h | 4 +++ target/arm/helper.h | 1 + target/arm/neon-dp.decode | 1 + target/arm/sve.decode | 2 ++ target/arm/sve_helper.c | 2 ++ target/arm/translate-a64.c | 17 +++++++++++++ target/arm/translate-sve.c | 16 ++++++++++++ target/arm/vfp_helper.c | 7 +++++ target/arm/translate-neon.c.inc | 45 +++++++++++++++++++++++++++++++++ 9 files changed, 95 insertions(+) diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h index fa7418e706..9287e6f26c 100644 --- a/target/arm/helper-sve.h +++ b/target/arm/helper-sve.h @@ -1197,6 +1197,8 @@ DEF_HELPER_FLAGS_5(sve_fcvt_hd, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) DEF_HELPER_FLAGS_5(sve_fcvt_sd, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_5(sve_bfcvt, TCG_CALL_NO_RWG, + void, ptr, ptr, ptr, ptr, i32) DEF_HELPER_FLAGS_5(sve_fcvtzs_hh, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) @@ -2744,6 +2746,8 @@ DEF_HELPER_FLAGS_5(sve2_fcvtnt_sh, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) DEF_HELPER_FLAGS_5(sve2_fcvtnt_ds, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) +DEF_HELPER_FLAGS_5(sve_bfcvtnt, TCG_CALL_NO_RWG, + void, ptr, ptr, ptr, ptr, i32) DEF_HELPER_FLAGS_5(sve2_fcvtlt_hs, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32) diff --git a/target/arm/helper.h b/target/arm/helper.h index 0892207f80..0b52ee6256 100644 --- a/target/arm/helper.h +++ b/target/arm/helper.h @@ -144,6 +144,7 @@ DEF_HELPER_3(vfp_cmped, void, f64, f64, env) DEF_HELPER_2(vfp_fcvtds, f64, f32, env) DEF_HELPER_2(vfp_fcvtsd, f32, f64, env) DEF_HELPER_FLAGS_2(bfcvt, TCG_CALL_NO_RWG, i32, f32, ptr) +DEF_HELPER_FLAGS_2(bfcvt_pair, TCG_CALL_NO_RWG, i32, i64, ptr) DEF_HELPER_2(vfp_uitoh, f16, i32, ptr) DEF_HELPER_2(vfp_uitos, f32, i32, ptr) diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode index ec83f10ab3..fd3a01bfa0 100644 --- a/target/arm/neon-dp.decode +++ b/target/arm/neon-dp.decode @@ -521,6 +521,7 @@ Vimm_1r 1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm VRINTZ 1111 001 11 . 11 .. 10 .... 0 1011 . . 0 .... @2misc VCVT_F16_F32 1111 001 11 . 11 .. 10 .... 0 1100 0 . 0 .... @2misc_q0 + VCVT_B16_F32 1111 001 11 . 11 .. 10 .... 0 1100 1 . 0 .... @2misc_q0 VRINTM 1111 001 11 . 11 .. 10 .... 0 1101 . . 0 .... @2misc diff --git a/target/arm/sve.decode b/target/arm/sve.decode index 3d7c4fa6e5..bad81580c5 100644 --- a/target/arm/sve.decode +++ b/target/arm/sve.decode @@ -987,6 +987,7 @@ FNMLS_zpzzz 01100101 .. 1 ..... 111 ... ..... ..... @rdn_pg_rm_ra # SVE floating-point convert precision FCVT_sh 01100101 10 0010 00 101 ... ..... ..... @rd_pg_rn_e0 FCVT_hs 01100101 10 0010 01 101 ... ..... ..... @rd_pg_rn_e0 +BFCVT 01100101 10 0010 10 101 ... ..... ..... @rd_pg_rn_e0 FCVT_dh 01100101 11 0010 00 101 ... ..... ..... @rd_pg_rn_e0 FCVT_hd 01100101 11 0010 01 101 ... ..... ..... @rd_pg_rn_e0 FCVT_ds 01100101 11 0010 10 101 ... ..... ..... @rd_pg_rn_e0 @@ -1561,6 +1562,7 @@ RAX1 01000101 00 1 ..... 11110 1 ..... ..... @rd_rn_rm_e0 FCVTXNT_ds 01100100 00 0010 10 101 ... ..... ..... @rd_pg_rn_e0 FCVTX_ds 01100101 00 0010 10 101 ... ..... ..... @rd_pg_rn_e0 FCVTNT_sh 01100100 10 0010 00 101 ... ..... ..... @rd_pg_rn_e0 +BFCVTNT 01100100 10 0010 10 101 ... ..... ..... @rd_pg_rn_e0 FCVTLT_hs 01100100 10 0010 01 101 ... ..... ..... @rd_pg_rn_e0 FCVTNT_ds 01100100 11 0010 10 101 ... ..... ..... @rd_pg_rn_e0 FCVTLT_sd 01100100 11 0010 11 101 ... ..... ..... @rd_pg_rn_e0 diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index c5c3017745..ae3db11c0d 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -4570,6 +4570,7 @@ static inline uint64_t vfp_float64_to_uint64_rtz(float64 f, float_status *s) DO_ZPZ_FP(sve_fcvt_sh, uint32_t, H1_4, sve_f32_to_f16) DO_ZPZ_FP(sve_fcvt_hs, uint32_t, H1_4, sve_f16_to_f32) +DO_ZPZ_FP(sve_bfcvt, uint32_t, H1_4, float32_to_bfloat16) DO_ZPZ_FP(sve_fcvt_dh, uint64_t, , sve_f64_to_f16) DO_ZPZ_FP(sve_fcvt_hd, uint64_t, , sve_f16_to_f64) DO_ZPZ_FP(sve_fcvt_ds, uint64_t, , float64_to_float32) @@ -7567,6 +7568,7 @@ void HELPER(NAME)(void *vd, void *vn, void *vg, void *status, uint32_t desc) \ } DO_FCVTNT(sve2_fcvtnt_sh, uint32_t, uint16_t, H1_4, H1_2, sve_f32_to_f16) +DO_FCVTNT(sve_bfcvtnt, uint32_t, uint16_t, H1_4, H1_2, float32_to_bfloat16) DO_FCVTNT(sve2_fcvtnt_ds, uint64_t, uint32_t, H1_4, H1_2, float64_to_float32) #define DO_FCVTLT(NAME, TYPEW, TYPEN, HW, HN, OP) \ diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index d767194cc7..c528fb2cf0 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -10361,6 +10361,13 @@ static void handle_2misc_narrow(DisasContext *s, bool scalar, tcg_temp_free_i32(ahp); } break; + case 0x36: /* BFCVTN, BFCVTN2 */ + { + TCGv_ptr fpst = fpstatus_ptr(FPST_FPCR); + gen_helper_bfcvt_pair(tcg_res[pass], tcg_op, fpst); + tcg_temp_free_ptr(fpst); + } + break; case 0x56: /* FCVTXN, FCVTXN2 */ /* 64 bit to 32 bit float conversion * with von Neumann rounding (round to odd) @@ -12761,6 +12768,16 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn) } handle_2misc_narrow(s, false, opcode, 0, is_q, size - 1, rn, rd); return; + case 0x36: /* BFCVTN, BFCVTN2 */ + if (!dc_isar_feature(aa64_bf16, s) || size != 2) { + unallocated_encoding(s); + return; + } + if (!fp_access_check(s)) { + return; + } + handle_2misc_narrow(s, false, opcode, 0, is_q, size - 1, rn, rd); + return; case 0x17: /* FCVTL, FCVTL2 */ if (!fp_access_check(s)) { return; diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c index cb0e7a1f68..aacbabd11e 100644 --- a/target/arm/translate-sve.c +++ b/target/arm/translate-sve.c @@ -4715,6 +4715,14 @@ static bool trans_FCVT_hs(DisasContext *s, arg_rpr_esz *a) return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, gen_helper_sve_fcvt_hs); } +static bool trans_BFCVT(DisasContext *s, arg_rpr_esz *a) +{ + if (!dc_isar_feature(aa64_sve_bf16, s)) { + return false; + } + return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, gen_helper_sve_bfcvt); +} + static bool trans_FCVT_dh(DisasContext *s, arg_rpr_esz *a) { return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, gen_helper_sve_fcvt_dh); @@ -8405,6 +8413,14 @@ static bool trans_FCVTNT_sh(DisasContext *s, arg_rpr_esz *a) return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, gen_helper_sve2_fcvtnt_sh); } +static bool trans_BFCVTNT(DisasContext *s, arg_rpr_esz *a) +{ + if (!dc_isar_feature(aa64_sve_bf16, s)) { + return false; + } + return do_zpz_ptr(s, a->rd, a->rn, a->pg, false, gen_helper_sve_bfcvtnt); +} + static bool trans_FCVTNT_ds(DisasContext *s, arg_rpr_esz *a) { if (!dc_isar_feature(aa64_sve2, s)) { diff --git a/target/arm/vfp_helper.c b/target/arm/vfp_helper.c index fe7a2a5daa..3328423cec 100644 --- a/target/arm/vfp_helper.c +++ b/target/arm/vfp_helper.c @@ -413,6 +413,13 @@ uint32_t HELPER(bfcvt)(float32 x, void *status) return float32_to_bfloat16(x, status); } +uint32_t HELPER(bfcvt_pair)(uint64_t pair, void *status) +{ + bfloat16 lo = float32_to_bfloat16(extract64(pair, 0, 32), status); + bfloat16 hi = float32_to_bfloat16(extract64(pair, 32, 32), status); + return deposit32(lo, 16, 16, hi); +} + /* * VFP3 fixed point conversion. The AArch32 versions of fix-to-float * must always round-to-nearest; the AArch64 ones honour the FPSCR diff --git a/target/arm/translate-neon.c.inc b/target/arm/translate-neon.c.inc index f1893b1dc8..8cc53892d6 100644 --- a/target/arm/translate-neon.c.inc +++ b/target/arm/translate-neon.c.inc @@ -3413,6 +3413,51 @@ static bool trans_VSHLL(DisasContext *s, arg_2misc *a) return true; } +static bool trans_VCVT_B16_F32(DisasContext *s, arg_2misc *a) +{ + TCGv_ptr fpst; + TCGv_i64 tmp; + TCGv_i32 dst0, dst1; + + if (!dc_isar_feature(aa32_bf16, s)) { + return false; + } + + /* UNDEF accesses to D16-D31 if they don't exist. */ + if (!dc_isar_feature(aa32_simd_r32, s) && + ((a->vd | a->vm) & 0x10)) { + return false; + } + + if ((a->vm & 1) || (a->size != 1)) { + return false; + } + + if (!vfp_access_check(s)) { + return true; + } + + fpst = fpstatus_ptr(FPST_STD); + tmp = tcg_temp_new_i64(); + dst0 = tcg_temp_new_i32(); + dst1 = tcg_temp_new_i32(); + + read_neon_element64(tmp, a->vm, 0, MO_64); + gen_helper_bfcvt_pair(dst0, tmp, fpst); + + read_neon_element64(tmp, a->vm, 1, MO_64); + gen_helper_bfcvt_pair(dst1, tmp, fpst); + + write_neon_element32(dst0, a->vd, 0, MO_32); + write_neon_element32(dst1, a->vd, 1, MO_32); + + tcg_temp_free_i64(tmp); + tcg_temp_free_i32(dst0); + tcg_temp_free_i32(dst1); + tcg_temp_free_ptr(fpst); + return true; +} + static bool trans_VCVT_F16_F32(DisasContext *s, arg_2misc *a) { TCGv_ptr fpst;