From patchwork Mon Apr 18 21:00:07 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aurelien Jarno X-Patchwork-Id: 91858 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 6E462B6FFD for ; Tue, 19 Apr 2011 07:05:28 +1000 (EST) Received: from localhost ([::1]:41918 helo=lists2.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvdN-0007qJ-Ol for incoming@patchwork.ozlabs.org; Mon, 18 Apr 2011 17:05:25 -0400 Received: from eggs.gnu.org ([140.186.70.92]:59445) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvYd-0007Sn-Ha for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QBvYb-0004mj-T1 for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:31 -0400 Received: from hall.aurel32.net ([88.191.126.93]:44208) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QBvYb-0004mP-Nz for qemu-devel@nongnu.org; Mon, 18 Apr 2011 17:00:29 -0400 Received: from [2001:470:d4ed:0:5e26:aff:fe2b:6f5b] (helo=volta.aurel32.net) by hall.aurel32.net with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1QBvYb-000289-1N; Mon, 18 Apr 2011 23:00:29 +0200 Received: from aurel32 by volta.aurel32.net with local (Exim 4.72) (envelope-from ) id 1QBvYU-0005TX-Vm; Mon, 18 Apr 2011 23:00:23 +0200 From: Aurelien Jarno To: qemu-devel@nongnu.org Date: Mon, 18 Apr 2011 23:00:07 +0200 Message-Id: <1303160412-8107-16-git-send-email-aurelien@aurel32.net> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1303160412-8107-1-git-send-email-aurelien@aurel32.net> References: <1303160412-8107-1-git-send-email-aurelien@aurel32.net> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 88.191.126.93 Cc: Aurelien Jarno Subject: [Qemu-devel] [PATCH 15/20] target-i386: replace approx_rsqrt and approx_rcp by softfloat ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 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 Signed-off-by: Aurelien Jarno Reviewed-by: Peter Maydell --- target-i386/op_helper.c | 10 ---------- target-i386/ops_sse.h | 36 ++++++++++++++++++++++++------------ 2 files changed, 24 insertions(+), 22 deletions(-) diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c index d935488..9628d27 100644 --- a/target-i386/op_helper.c +++ b/target-i386/op_helper.c @@ -4794,16 +4794,6 @@ void helper_boundl(target_ulong a0, int v) } } -static float approx_rsqrt(float a) -{ - return 1.0 / sqrt(a); -} - -static float approx_rcp(float a) -{ - return 1.0 / a; -} - #if !defined(CONFIG_USER_ONLY) #define MMUSUFFIX _mmu diff --git a/target-i386/ops_sse.h b/target-i386/ops_sse.h index ac0f150..703be99 100644 --- a/target-i386/ops_sse.h +++ b/target-i386/ops_sse.h @@ -778,28 +778,38 @@ int64_t helper_cvttsd2sq(XMMReg *s) void helper_rsqrtps(XMMReg *d, XMMReg *s) { - d->XMM_S(0) = approx_rsqrt(s->XMM_S(0)); - d->XMM_S(1) = approx_rsqrt(s->XMM_S(1)); - d->XMM_S(2) = approx_rsqrt(s->XMM_S(2)); - d->XMM_S(3) = approx_rsqrt(s->XMM_S(3)); + d->XMM_S(0) = float32_div(float32_one, + float32_sqrt(s->XMM_S(0), &env->sse_status), + &env->sse_status); + d->XMM_S(1) = float32_div(float32_one, + float32_sqrt(s->XMM_S(1), &env->sse_status), + &env->sse_status); + d->XMM_S(2) = float32_div(float32_one, + float32_sqrt(s->XMM_S(2), &env->sse_status), + &env->sse_status); + d->XMM_S(3) = float32_div(float32_one, + float32_sqrt(s->XMM_S(3), &env->sse_status), + &env->sse_status); } void helper_rsqrtss(XMMReg *d, XMMReg *s) { - d->XMM_S(0) = approx_rsqrt(s->XMM_S(0)); + d->XMM_S(0) = float32_div(float32_one, + float32_sqrt(s->XMM_S(0), &env->sse_status), + &env->sse_status); } void helper_rcpps(XMMReg *d, XMMReg *s) { - d->XMM_S(0) = approx_rcp(s->XMM_S(0)); - d->XMM_S(1) = approx_rcp(s->XMM_S(1)); - d->XMM_S(2) = approx_rcp(s->XMM_S(2)); - d->XMM_S(3) = approx_rcp(s->XMM_S(3)); + d->XMM_S(0) = float32_div(float32_one, s->XMM_S(0), &env->sse_status); + d->XMM_S(1) = float32_div(float32_one, s->XMM_S(1), &env->sse_status); + d->XMM_S(2) = float32_div(float32_one, s->XMM_S(2), &env->sse_status); + d->XMM_S(3) = float32_div(float32_one, s->XMM_S(3), &env->sse_status); } void helper_rcpss(XMMReg *d, XMMReg *s) { - d->XMM_S(0) = approx_rcp(s->XMM_S(0)); + d->XMM_S(0) = float32_div(float32_one, s->XMM_S(0), &env->sse_status); } static inline uint64_t helper_extrq(uint64_t src, int shift, int len) @@ -1272,14 +1282,16 @@ void helper_pfpnacc(MMXReg *d, MMXReg *s) void helper_pfrcp(MMXReg *d, MMXReg *s) { - d->MMX_S(0) = approx_rcp(s->MMX_S(0)); + d->MMX_S(0) = float32_div(float32_one, s->MMX_S(0), &env->mmx_status); d->MMX_S(1) = d->MMX_S(0); } void helper_pfrsqrt(MMXReg *d, MMXReg *s) { d->MMX_L(1) = s->MMX_L(0) & 0x7fffffff; - d->MMX_S(1) = approx_rsqrt(d->MMX_S(1)); + d->MMX_S(1) = float32_div(float32_one, + float32_sqrt(d->MMX_S(1), &env->mmx_status), + &env->mmx_status); d->MMX_L(1) |= s->MMX_L(0) & 0x80000000; d->MMX_L(0) = d->MMX_L(1); }