From patchwork Sun Jul 12 23:45:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658431 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4046160D for ; Sun, 12 Jul 2020 23:46:32 +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 219ED20674 for ; Sun, 12 Jul 2020 23:46:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 219ED20674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:52782 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1julfz-0000FO-AN for patchwork-qemu-devel@patchwork.kernel.org; Sun, 12 Jul 2020 19:46:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41884) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julfD-00072m-GR for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:44 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:39413) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julf6-0007FG-Td for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:43 -0400 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.08604655|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_system_inform|0.191123-0.000352562-0.808525; FP=0|0|0|0|0|-1|-1|-1; HT=e02c03306; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:27 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 1/8] fpu/softfloat: fix up float16 nan recognition Date: Mon, 13 Jul 2020 07:45:14 +0800 Message-Id: <20200712234521.3972-2-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson --- fpu/softfloat-specialize.inc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fpu/softfloat-specialize.inc.c b/fpu/softfloat-specialize.inc.c index 44f5b661f8..034d18199c 100644 --- a/fpu/softfloat-specialize.inc.c +++ b/fpu/softfloat-specialize.inc.c @@ -254,7 +254,7 @@ bool float16_is_quiet_nan(float16 a_, float_status *status) if (snan_bit_is_one(status)) { return (((a >> 9) & 0x3F) == 0x3E) && (a & 0x1FF); } else { - return ((a & ~0x8000) >= 0x7C80); + return ((a >> 9) & 0x3F) == 0x3F; } #endif } @@ -271,7 +271,7 @@ bool float16_is_signaling_nan(float16 a_, float_status *status) #else uint16_t a = float16_val(a_); if (snan_bit_is_one(status)) { - return ((a & ~0x8000) >= 0x7C80); + return ((a >> 9) & 0x3F) == 0x3F; } else { return (((a >> 9) & 0x3F) == 0x3E) && (a & 0x1FF); } From patchwork Sun Jul 12 23:45:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658437 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A150413B6 for ; Sun, 12 Jul 2020 23:48:03 +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 8315B20674 for ; Sun, 12 Jul 2020 23:48:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8315B20674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:32942 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1julhS-0003bT-O7 for patchwork-qemu-devel@patchwork.kernel.org; Sun, 12 Jul 2020 19:48:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41882) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julfC-00072k-VQ for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:44 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:35461) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julf6-0007FH-T4 for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:42 -0400 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.08104733|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_alarm|0.159639-0.000141355-0.840219; FP=0|0|0|0|0|-1|-1|-1; HT=e01l07447; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:27 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 2/8] fpu/softfloat: use the similiar logic to recognize sNaN and qNaN Date: Mon, 13 Jul 2020 07:45:15 +0800 Message-Id: <20200712234521.3972-3-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei --- fpu/softfloat-specialize.inc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fpu/softfloat-specialize.inc.c b/fpu/softfloat-specialize.inc.c index 034d18199c..6b778a7830 100644 --- a/fpu/softfloat-specialize.inc.c +++ b/fpu/softfloat-specialize.inc.c @@ -292,7 +292,7 @@ bool float32_is_quiet_nan(float32 a_, float_status *status) if (snan_bit_is_one(status)) { return (((a >> 22) & 0x1FF) == 0x1FE) && (a & 0x003FFFFF); } else { - return ((uint32_t)(a << 1) >= 0xFF800000); + return ((a >> 22) & 0x1FF) == 0x1FF; } #endif } @@ -309,7 +309,7 @@ bool float32_is_signaling_nan(float32 a_, float_status *status) #else uint32_t a = float32_val(a_); if (snan_bit_is_one(status)) { - return ((uint32_t)(a << 1) >= 0xFF800000); + return ((a >> 22) & 0x1FF) == 0x1FF; } else { return (((a >> 22) & 0x1FF) == 0x1FE) && (a & 0x003FFFFF); } @@ -647,7 +647,7 @@ bool float64_is_quiet_nan(float64 a_, float_status *status) return (((a >> 51) & 0xFFF) == 0xFFE) && (a & 0x0007FFFFFFFFFFFFULL); } else { - return ((a << 1) >= 0xFFF0000000000000ULL); + return ((a >> 51) & 0xFFF) == 0xFFF; } #endif } @@ -664,7 +664,7 @@ bool float64_is_signaling_nan(float64 a_, float_status *status) #else uint64_t a = float64_val(a_); if (snan_bit_is_one(status)) { - return ((a << 1) >= 0xFFF0000000000000ULL); + return ((a >> 51) & 0xFFF) == 0xFFF; } else { return (((a >> 51) & 0xFFF) == 0xFFE) && (a & UINT64_C(0x0007FFFFFFFFFFFF)); From patchwork Sun Jul 12 23:45:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658441 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3AE2D60D for ; Sun, 12 Jul 2020 23:48:06 +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 1C69620674 for ; Sun, 12 Jul 2020 23:48:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C69620674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:33260 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1julhV-0003jF-AY for patchwork-qemu-devel@patchwork.kernel.org; Sun, 12 Jul 2020 19:48:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41888) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julfF-00074T-0E for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:45 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:46503) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julf6-0007FP-TO for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:44 -0400 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.3111103|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_system_inform|0.0280463-0.000471656-0.971482; FP=0|0|0|0|0|-1|-1|-1; HT=e02c03293; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:28 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 3/8] fpu/softfloat: add FloatFmt for bfloat16 Date: Mon, 13 Jul 2020 07:45:16 +0800 Message-Id: <20200712234521.3972-4-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson --- fpu/softfloat.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 79be4f5840..1ef07d9160 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -554,6 +554,10 @@ static const FloatFmt float16_params_ahp = { .arm_althp = true }; +static const FloatFmt bfloat16_params = { + FLOAT_PARAMS(8, 7) +}; + static const FloatFmt float32_params = { FLOAT_PARAMS(8, 23) }; From patchwork Sun Jul 12 23:45:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658429 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5F11E913 for ; Sun, 12 Jul 2020 23:46:31 +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 339ED20674 for ; Sun, 12 Jul 2020 23:46:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 339ED20674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; 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NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:28 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 4/8] fpu/softfloat: add pack and unpack interfaces for bfloat16 Date: Mon, 13 Jul 2020 07:45:17 +0800 Message-Id: <20200712234521.3972-5-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei --- fpu/softfloat.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 1ef07d9160..54fc889446 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -584,6 +584,11 @@ static inline FloatParts float16_unpack_raw(float16 f) return unpack_raw(float16_params, f); } +static inline FloatParts bfloat16_unpack_raw(bfloat16 f) +{ + return unpack_raw(bfloat16_params, f); +} + static inline FloatParts float32_unpack_raw(float32 f) { return unpack_raw(float32_params, f); @@ -607,6 +612,11 @@ static inline float16 float16_pack_raw(FloatParts p) return make_float16(pack_raw(float16_params, p)); } +static inline bfloat16 bfloat16_pack_raw(FloatParts p) +{ + return make_bfloat16(pack_raw(bfloat16_params, p)); +} + static inline float32 float32_pack_raw(FloatParts p) { return make_float32(pack_raw(float32_params, p)); @@ -824,6 +834,11 @@ static FloatParts float16_unpack_canonical(float16 f, float_status *s) return float16a_unpack_canonical(f, s, &float16_params); } +static FloatParts bfloat16_unpack_canonical(bfloat16 f, float_status *s) +{ + return sf_canonicalize(bfloat16_unpack_raw(f), &bfloat16_params, s); +} + static float16 float16a_round_pack_canonical(FloatParts p, float_status *s, const FloatFmt *params) { @@ -835,6 +850,11 @@ static float16 float16_round_pack_canonical(FloatParts p, float_status *s) return float16a_round_pack_canonical(p, s, &float16_params); } +static bfloat16 bfloat16_round_pack_canonical(FloatParts p, float_status *s) +{ + return float16a_round_pack_canonical(p, s, &bfloat16_params); +} + static FloatParts float32_unpack_canonical(float32 f, float_status *s) { return sf_canonicalize(float32_unpack_raw(f), &float32_params, s); From patchwork Sun Jul 12 23:45:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658439 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C455C60D for ; Sun, 12 Jul 2020 23:48:04 +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 A5C3D20674 for ; Sun, 12 Jul 2020 23:48:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A5C3D20674 Authentication-Results: mail.kernel.org; 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FP=0|0|0|0|0|-1|-1|-1; HT=e02c03294; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:28 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 5/8] fpu/softfloat: define brain floating-point types Date: Mon, 13 Jul 2020 07:45:18 +0800 Message-Id: <20200712234521.3972-6-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei --- include/fpu/softfloat-types.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h index 7680193ebc..8f8fdfeecf 100644 --- a/include/fpu/softfloat-types.h +++ b/include/fpu/softfloat-types.h @@ -112,6 +112,14 @@ typedef struct { #define make_float128(high_, low_) ((float128) { .high = high_, .low = low_ }) #define make_float128_init(high_, low_) { .high = high_, .low = low_ } +/* + * Software brain floating-point types + */ +typedef uint16_t bfloat16; +#define bfloat16_val(x) (x) +#define make_bfloat16(x) (x) +#define const_bfloat16(x) (x) + /* * Software IEC/IEEE floating-point underflow tininess-detection mode. */ From patchwork Sun Jul 12 23:45:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658443 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AF6FB60D for ; Sun, 12 Jul 2020 23:49:20 +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 802D420674 for ; Sun, 12 Jul 2020 23:49:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 802D420674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; 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NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:29 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 6/8] fpu/softfloat: define operation for bfloat16 Date: Mon, 13 Jul 2020 07:45:19 +0800 Message-Id: <20200712234521.3972-7-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson --- fpu/softfloat.c | 146 +++++++++++++++++++++++++++++++++++++++- include/fpu/softfloat.h | 44 ++++++++++++ 2 files changed, 189 insertions(+), 1 deletion(-) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 54fc889446..9a58107be3 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -1182,6 +1182,28 @@ float64_sub(float64 a, float64 b, float_status *s) return float64_addsub(a, b, s, hard_f64_sub, soft_f64_sub); } +/* + * Returns the result of adding or subtracting the brain floating-point + * values `a' and `b'. + */ +bfloat16 QEMU_FLATTEN bfloat16_add(bfloat16 a, bfloat16 b, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pb = bfloat16_unpack_canonical(b, status); + FloatParts pr = addsub_floats(pa, pb, false, status); + + return bfloat16_round_pack_canonical(pr, status); +} + +bfloat16 QEMU_FLATTEN bfloat16_sub(bfloat16 a, bfloat16 b, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pb = bfloat16_unpack_canonical(b, status); + FloatParts pr = addsub_floats(pa, pb, true, status); + + return bfloat16_round_pack_canonical(pr, status); +} + /* * Returns the result of multiplying the floating-point values `a' and * `b'. The operation is performed according to the IEC/IEEE Standard @@ -1284,6 +1306,20 @@ float64_mul(float64 a, float64 b, float_status *s) f64_is_zon2, f64_addsubmul_post); } +/* + * Returns the result of multiplying the brain floating-point + * values `a' and `b'. + */ + +bfloat16 QEMU_FLATTEN bfloat16_mul(bfloat16 a, bfloat16 b, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pb = bfloat16_unpack_canonical(b, status); + FloatParts pr = mul_floats(pa, pb, status); + + return bfloat16_round_pack_canonical(pr, status); +} + /* * Returns the result of multiplying the floating-point values `a' and * `b' then adding 'c', with no intermediate rounding step after the @@ -1666,6 +1702,23 @@ float64_muladd(float64 xa, float64 xb, float64 xc, int flags, float_status *s) return soft_f64_muladd(ua.s, ub.s, uc.s, flags, s); } +/* + * Returns the result of multiplying the brain floating-point values `a' + * and `b' then adding 'c', with no intermediate rounding step after the + * multiplication. + */ + +bfloat16 QEMU_FLATTEN bfloat16_muladd(bfloat16 a, bfloat16 b, bfloat16 c, + int flags, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pb = bfloat16_unpack_canonical(b, status); + FloatParts pc = bfloat16_unpack_canonical(c, status); + FloatParts pr = muladd_floats(pa, pb, pc, flags, status); + + return bfloat16_round_pack_canonical(pr, status); +} + /* * Returns the result of dividing the floating-point value `a' by the * corresponding value `b'. The operation is performed according to @@ -1832,6 +1885,20 @@ float64_div(float64 a, float64 b, float_status *s) f64_div_pre, f64_div_post); } +/* + * Returns the result of dividing the brain floating-point + * value `a' by the corresponding value `b'. + */ + +bfloat16 bfloat16_div(bfloat16 a, bfloat16 b, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pb = bfloat16_unpack_canonical(b, status); + FloatParts pr = div_floats(pa, pb, status); + + return bfloat16_round_pack_canonical(pr, status); +} + /* * Float to Float conversions * @@ -2871,6 +2938,25 @@ MINMAX(64, maxnummag, false, true, true) #undef MINMAX +#define BF16_MINMAX(name, ismin, isiee, ismag) \ +bfloat16 bfloat16_ ## name(bfloat16 a, bfloat16 b, float_status *s) \ +{ \ + FloatParts pa = bfloat16_unpack_canonical(a, s); \ + FloatParts pb = bfloat16_unpack_canonical(b, s); \ + FloatParts pr = minmax_floats(pa, pb, ismin, isiee, ismag, s); \ + \ + return bfloat16_round_pack_canonical(pr, s); \ +} + +BF16_MINMAX(min, true, false, false) +BF16_MINMAX(minnum, true, true, false) +BF16_MINMAX(minnummag, true, true, true) +BF16_MINMAX(max, false, false, false) +BF16_MINMAX(maxnum, false, true, false) +BF16_MINMAX(maxnummag, false, true, true) + +#undef BF16_MINMAX + /* Floating point compare */ static FloatRelation compare_floats(FloatParts a, FloatParts b, bool is_quiet, float_status *s) @@ -3032,6 +3118,24 @@ FloatRelation float64_compare_quiet(float64 a, float64 b, float_status *s) return f64_compare(a, b, true, s); } +static int QEMU_FLATTEN +soft_bf16_compare(bfloat16 a, bfloat16 b, bool is_quiet, float_status *s) +{ + FloatParts pa = bfloat16_unpack_canonical(a, s); + FloatParts pb = bfloat16_unpack_canonical(b, s); + return compare_floats(pa, pb, is_quiet, s); +} + +int bfloat16_compare(bfloat16 a, bfloat16 b, float_status *s) +{ + return soft_bf16_compare(a, b, false, s); +} + +int bfloat16_compare_quiet(bfloat16 a, bfloat16 b, float_status *s) +{ + return soft_bf16_compare(a, b, true, s); +} + /* Multiply A by 2 raised to the power N. */ static FloatParts scalbn_decomposed(FloatParts a, int n, float_status *s) { @@ -3039,7 +3143,7 @@ static FloatParts scalbn_decomposed(FloatParts a, int n, float_status *s) return return_nan(a, s); } if (a.cls == float_class_normal) { - /* The largest float type (even though not supported by FloatParts) + /* The largest float type (even though nt supported by FloatParts) * is float128, which has a 15 bit exponent. Bounding N to 16 bits * still allows rounding to infinity, without allowing overflow * within the int32_t that backs FloatParts.exp. @@ -3071,6 +3175,13 @@ float64 float64_scalbn(float64 a, int n, float_status *status) return float64_round_pack_canonical(pr, status); } +bfloat16 bfloat16_scalbn(bfloat16 a, int n, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pr = scalbn_decomposed(pa, n, status); + return bfloat16_round_pack_canonical(pr, status); +} + /* * Square Root * @@ -3221,6 +3332,13 @@ float64 QEMU_FLATTEN float64_sqrt(float64 xa, float_status *s) return soft_f64_sqrt(ua.s, s); } +bfloat16 QEMU_FLATTEN bfloat16_sqrt(bfloat16 a, float_status *status) +{ + FloatParts pa = bfloat16_unpack_canonical(a, status); + FloatParts pr = sqrt_float(pa, status, &bfloat16_params); + return bfloat16_round_pack_canonical(pr, status); +} + /*---------------------------------------------------------------------------- | The pattern for a default generated NaN. *----------------------------------------------------------------------------*/ @@ -3263,6 +3381,13 @@ float128 float128_default_nan(float_status *status) return r; } +bfloat16 bfloat16_default_nan(float_status *status) +{ + FloatParts p = parts_default_nan(status); + p.frac >>= bfloat16_params.frac_shift; + return bfloat16_pack_raw(p); +} + /*---------------------------------------------------------------------------- | Returns a quiet NaN from a signalling NaN for the floating point value `a'. *----------------------------------------------------------------------------*/ @@ -3294,6 +3419,14 @@ float64 float64_silence_nan(float64 a, float_status *status) return float64_pack_raw(p); } +bfloat16 bfloat16_silence_nan(bfloat16 a, float_status *status) +{ + FloatParts p = bfloat16_unpack_raw(a); + p.frac <<= bfloat16_params.frac_shift; + p = parts_silence_nan(p, status); + p.frac >>= bfloat16_params.frac_shift; + return bfloat16_pack_raw(p); +} /*---------------------------------------------------------------------------- | If `a' is denormal and we are in flush-to-zero mode then set the @@ -3343,6 +3476,17 @@ float64 float64_squash_input_denormal(float64 a, float_status *status) return a; } +bfloat16 bfloat16_squash_input_denormal(bfloat16 a, float_status *status) +{ + if (status->flush_inputs_to_zero) { + FloatParts p = bfloat16_unpack_raw(a); + if (parts_squash_denormal(p, status)) { + return bfloat16_set_sign(bfloat16_zero, p.sign); + } + } + return a; +} + /*---------------------------------------------------------------------------- | Takes a 64-bit fixed-point value `absZ' with binary point between bits 6 | and 7, and returns the properly rounded 32-bit integer corresponding to the diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index ff4e2605b1..07020eafad 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -239,6 +239,37 @@ bool float16_is_quiet_nan(float16, float_status *status); bool float16_is_signaling_nan(float16, float_status *status); float16 float16_silence_nan(float16, float_status *status); +/*---------------------------------------------------------------------------- +| Software brain floatint-point operations. +*----------------------------------------------------------------------------*/ + +bfloat16 bfloat16_add(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_sub(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_mul(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_div(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_muladd(bfloat16, bfloat16, bfloat16, int, + float_status *status); +float16 bfloat16_scalbn(bfloat16, int, float_status *status); +bfloat16 bfloat16_min(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_max(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_minnum(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_maxnum(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_minnummag(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_maxnummag(bfloat16, bfloat16, float_status *status); +bfloat16 bfloat16_sqrt(bfloat16, float_status *status); +int bfloat16_compare(bfloat16, bfloat16, float_status *status); +int bfloat16_compare_quiet(bfloat16, bfloat16, float_status *status); +int bfloat16_unordered_quiet(bfloat16, bfloat16, float_status *status); +int bfloat16_le(bfloat16, bfloat16, float_status *status); +int bfloat16_lt(bfloat16, bfloat16, float_status *status); +int bfloat16_eq_quiet(bfloat16, bfloat16, float_status *status); + +int bfloat16_is_quiet_nan(bfloat16, float_status *status); +int bfloat16_is_signaling_nan(bfloat16, float_status *status); +bfloat16 bfloat16_silence_nan(bfloat16, float_status *status); +bfloat16 bfloat16_default_nan(float_status *status); +bfloat16 bfloat16_squash_input_denormal(bfloat16 a, float_status *status); + static inline bool float16_is_any_nan(float16 a) { return ((float16_val(a) & ~0x8000) > 0x7c00); @@ -293,6 +324,19 @@ static inline float16 float16_set_sign(float16 a, int sign) #define float16_three make_float16(0x4200) #define float16_infinity make_float16(0x7c00) +static inline bfloat16 bfloat16_set_sign(bfloat16 a, int sign) +{ + return make_bfloat16((bfloat16_val(a) & 0x7fff) | (sign << 15)); +} + +#define bfloat16_zero make_bfloat16(0) +#define bfloat16_half make_bfloat16(0x3f00) +#define bfloat16_one make_bfloat16(0x3f80) +#define bfloat16_one_point_five make_bfloat16(0x3fc0) +#define bfloat16_two make_bfloat16(0x4000) +#define bfloat16_three make_bfloat16(0x4040) +#define bfloat16_infinity make_bfloat16(0x7f80) + /*---------------------------------------------------------------------------- | The pattern for a default generated half-precision NaN. *----------------------------------------------------------------------------*/ From patchwork Sun Jul 12 23:45:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: LIU Zhiwei X-Patchwork-Id: 11658433 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F1A360D for ; Sun, 12 Jul 2020 23:46:34 +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 30A8620674 for ; Sun, 12 Jul 2020 23:46:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 30A8620674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-sky.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:53006 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1julg1-0000LC-D5 for patchwork-qemu-devel@patchwork.kernel.org; Sun, 12 Jul 2020 19:46:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41870) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julfC-00072P-Cm for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:42 -0400 Received: from smtp2200-217.mail.aliyun.com ([121.197.200.217]:37259) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1julf6-0007Fo-SS for qemu-devel@nongnu.org; Sun, 12 Jul 2020 19:45:42 -0400 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.07634485|-1; CH=green; DM=|CONTINUE|false|; DS=CONTINUE|ham_system_inform|0.0985976-0.002253-0.899149; FP=0|0|0|0|0|-1|-1|-1; HT=e01a16378; MF=zhiwei_liu@c-sky.com; NM=1; PH=DS; RN=6; RT=6; SR=0; TI=SMTPD_---.I0oni3i_1594597526; Received: from L-PF1D6DP4-1208.hz.ali.com(mailfrom:zhiwei_liu@c-sky.com fp:SMTPD_---.I0oni3i_1594597526) by smtp.aliyun-inc.com(10.147.40.7); Mon, 13 Jul 2020 07:45:30 +0800 From: LIU Zhiwei To: qemu-devel@nongnu.org Subject: [RFC PATCH 8/8] fpu/softfloat: define misc operation for bfloat16 Date: Mon, 13 Jul 2020 07:45:21 +0800 Message-Id: <20200712234521.3972-9-zhiwei_liu@c-sky.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200712234521.3972-1-zhiwei_liu@c-sky.com> References: <20200712234521.3972-1-zhiwei_liu@c-sky.com> MIME-Version: 1.0 Received-SPF: none client-ip=121.197.200.217; envelope-from=zhiwei_liu@c-sky.com; helo=smtp2200-217.mail.aliyun.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/12 19:45:28 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, UNPARSEABLE_RELAY=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: alex.bennee@linaro.org, wenmeng_zhang@c-sky.com, richard.henderson@linaro.org, LIU Zhiwei , wxy194768@alibaba-inc.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: LIU Zhiwei Reviewed-by: Richard Henderson --- fpu/softfloat-specialize.inc.c | 38 +++++++++++++++++++++++++++++++ include/fpu/softfloat.h | 41 ++++++++++++++++++++++++++++++++++ 2 files changed, 79 insertions(+) diff --git a/fpu/softfloat-specialize.inc.c b/fpu/softfloat-specialize.inc.c index 6b778a7830..ff17f11f0c 100644 --- a/fpu/softfloat-specialize.inc.c +++ b/fpu/softfloat-specialize.inc.c @@ -259,6 +259,25 @@ bool float16_is_quiet_nan(float16 a_, float_status *status) #endif } +/*---------------------------------------------------------------------------- +| Returns 1 if the brain floating point value `a' is a quiet +| NaN; otherwise returns 0. +*----------------------------------------------------------------------------*/ + +int bfloat16_is_quiet_nan(bfloat16 a_, float_status *status) +{ +#ifdef NO_SIGNALING_NANS + return bfloat16_is_any_nan(a_); +#else + uint16_t a = bfloat16_val(a_); + if (snan_bit_is_one(status)) { + return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F); + } else { + return ((a >> 6) & 0x1FF) == 0x1FF; + } +#endif +} + /*---------------------------------------------------------------------------- | Returns 1 if the half-precision floating-point value `a' is a signaling | NaN; otherwise returns 0. @@ -278,6 +297,25 @@ bool float16_is_signaling_nan(float16 a_, float_status *status) #endif } +/*---------------------------------------------------------------------------- +| Returns 1 if the brain floating point value `a' is a signaling +| NaN; otherwise returns 0. +*----------------------------------------------------------------------------*/ + +int bfloat16_is_signaling_nan(bfloat16 a_, float_status *status) +{ +#ifdef NO_SIGNALING_NANS + return 0; +#else + uint16_t a = bfloat16_val(a_); + if (snan_bit_is_one(status)) { + return ((a >> 6) & 0x1FF) == 0x1FF; + } else { + return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F); + } +#endif +} + /*---------------------------------------------------------------------------- | Returns 1 if the single-precision floating-point value `a' is a quiet | NaN; otherwise returns 0. diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 6590850253..d2c3f5fbe0 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -372,6 +372,47 @@ static inline float16 float16_set_sign(float16 a, int sign) #define float16_three make_float16(0x4200) #define float16_infinity make_float16(0x7c00) +static inline int bfloat16_is_any_nan(bfloat16 a) +{ + return ((bfloat16_val(a) & ~0x8000) > 0x7F80); +} + +static inline int bfloat16_is_neg(bfloat16 a) +{ + return bfloat16_val(a) >> 15; +} + +static inline int bfloat16_is_infinity(bfloat16 a) +{ + return (bfloat16_val(a) & 0x7fff) == 0x7F80; +} + +static inline int bfloat16_is_zero(bfloat16 a) +{ + return (bfloat16_val(a) & 0x7fff) == 0; +} + +static inline int bfloat16_is_zero_or_denormal(bfloat16 a) +{ + return (bfloat16_val(a) & 0x7F80) == 0; +} + +static inline bfloat16 bfloat16_abs(bfloat16 a) +{ + /* Note that abs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_bfloat16(bfloat16_val(a) & 0x7fff); +} + +static inline bfloat16 bfloat16_chs(bfloat16 a) +{ + /* Note that chs does *not* handle NaN specially, nor does + * it flush denormal inputs to zero. + */ + return make_bfloat16(bfloat16_val(a) ^ 0x8000); +} + static inline bfloat16 bfloat16_set_sign(bfloat16 a, int sign) { return make_bfloat16((bfloat16_val(a) & 0x7fff) | (sign << 15));