From 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Thu, 8 Jun 2017 15:39:03 -0400 Subject: Prepare for radical source tree reorganization. All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control). --- sysdeps/ia64/fpu/s_nearbyint.S | 217 ----------------------------------------- 1 file changed, 217 deletions(-) delete mode 100644 sysdeps/ia64/fpu/s_nearbyint.S (limited to 'sysdeps/ia64/fpu/s_nearbyint.S') diff --git a/sysdeps/ia64/fpu/s_nearbyint.S b/sysdeps/ia64/fpu/s_nearbyint.S deleted file mode 100644 index ec1ff22dbc..0000000000 --- a/sysdeps/ia64/fpu/s_nearbyint.S +++ /dev/null @@ -1,217 +0,0 @@ -.file "nearbyint.s" - - -// Copyright (c) 2000 - 2003, Intel Corporation -// All rights reserved. -// -// Contributed 2000 by the Intel Numerics Group, Intel Corporation -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// -// * Redistributions in binary form must reproduce the above copyright -// notice, this list of conditions and the following disclaimer in the -// documentation and/or other materials provided with the distribution. -// -// * The name of Intel Corporation may not be used to endorse or promote -// products derived from this software without specific prior written -// permission. - -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS -// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY -// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING -// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// -// Intel Corporation is the author of this code, and requests that all -// problem reports or change requests be submitted to it directly at -// http://www.intel.com/software/products/opensource/libraries/num.htm. -// -// History -//============================================================== -// 10/19/00 Created -// 02/08/01 Corrected behavior for all rounding modes. -// 05/20/02 Cleaned up namespace and sf0 syntax -// 02/10/03 Reordered header: .section, .global, .proc, .align -// 07/25/03 Improved performance -//============================================================== - -// API -//============================================================== -// double nearbyint(double x) -//============================================================== - -// general input registers: -// r14 - r21 - -rSignexp = r14 -rExp = r15 -rExpMask = r16 -rBigexp = r17 -rFpsr = r19 -rRcs0 = r20 -rRcs0Mask = r21 - -// floating-point registers: -// f8 - f10 - -fXInt = f9 -fNormX = f10 - -// predicate registers used: -// p6 - p10 - -// Overview of operation -//============================================================== -// double nearbyint(double x) -// Return an integer value (represented as a double) that is x -// rounded to integer in current rounding mode -// Inexact is not set, otherwise result identical with rint. -//============================================================== - -// double_extended -// if the exponent is > 1003e => 3F(true) = 63(decimal) -// we have a significand of 64 bits 1.63-bits. -// If we multiply by 2^63, we no longer have a fractional part -// So input is an integer value already. - -// double -// if the exponent is >= 10033 => 34(true) = 52(decimal) -// 34 + 3ff = 433 -// we have a significand of 53 bits 1.52-bits. (implicit 1) -// If we multiply by 2^52, we no longer have a fractional part -// So input is an integer value already. - -// single -// if the exponent is > 10016 => 17(true) = 23(decimal) -// we have a significand of 24 bits 1.23-bits. (implicit 1) -// If we multiply by 2^23, we no longer have a fractional part -// So input is an integer value already. - -.section .text -GLOBAL_LIBM_ENTRY(nearbyint) - -{ .mfi - getf.exp rSignexp = f8 // Get signexp, recompute if unorm - fclass.m p7,p0 = f8, 0x0b // Test x unorm - addl rBigexp = 0x10033, r0 // Set exponent at which is integer -} -{ .mfi - nop.m 0 - fcvt.fx.s1 fXInt = f8 // Convert to int in significand - mov rExpMask = 0x1FFFF // Form exponent mask -} -;; - -{ .mfi - mov rFpsr = ar40 // Read fpsr -- check rc.s0 - fclass.m p6,p0 = f8, 0x1e3 // Test x natval, nan, inf - nop.i 0 -} -{ .mfb - nop.m 0 - fnorm.s1 fNormX = f8 // Normalize input -(p7) br.cond.spnt RINT_UNORM // Branch if x unorm -} -;; - - -RINT_COMMON: -// Return here from RINT_UNORM -{ .mfb - and rExp = rSignexp, rExpMask // Get biased exponent -(p6) fma.d.s0 f8 = f8, f1, f0 // Result if x natval, nan, inf -(p6) br.ret.spnt b0 // Exit if x natval, nan, inf -} -;; - -{ .mfi - mov rRcs0Mask = 0x0c00 // Mask for rc.s0 - fcvt.xf f8 = fXInt // Result assume |x| < 2^52 - cmp.ge p7,p8 = rExp, rBigexp // Is |x| >= 2^52? -} -;; - -// We must correct result if |x| >= 2^52 -{ .mfi - nop.m 0 -(p7) fma.d.s0 f8 = fNormX, f1, f0 // If |x| >= 2^52, result x - nop.i 0 -} -;; - -{ .mfi - nop.m 0 -(p8) fmerge.s f8 = fNormX, f8 // Make sign nearbyint(x) = sign x - nop.i 0 -} -;; - -{ .mfi -(p8) and rRcs0 = rFpsr, rRcs0Mask // Get rounding mode for sf0 - nop.f 0 - nop.i 0 -} -;; - -// If |x| < 2^52 we must test for other rounding modes -{ .mbb -(p8) cmp.ne.unc p10,p0 = rRcs0, r0 // Test for other rounding modes -(p10) br.cond.spnt RINT_NOT_ROUND_NEAREST // Branch if not round nearest - br.ret.sptk b0 // Exit main path if round nearest -} -;; - - -RINT_UNORM: -// Here if x unorm -{ .mfb - getf.exp rSignexp = fNormX // Get signexp, recompute if unorm - fcmp.eq.s0 p7,p0 = f8, f0 // Dummy op to set denormal flag - br.cond.sptk RINT_COMMON // Return to main path -} -;; - -RINT_NOT_ROUND_NEAREST: -// Here if not round to nearest, and |x| < 2^52 -// Set rounding mode of s2 to that of s0, and repeat the conversion using s2 -{ .mfi - nop.m 0 - fsetc.s2 0x7f, 0x40 - nop.i 0 -} -;; - -{ .mfi - nop.m 0 - fcvt.fx.s2 fXInt = fNormX // Convert to int in significand - nop.i 0 -} -;; - -{ .mfi - nop.m 0 - fcvt.xf f8 = fXInt // Expected result - nop.i 0 -} -;; - -// Be sure sign of result = sign of input. Fixes cases where result is 0. -{ .mfb - nop.m 0 - fmerge.s f8 = fNormX, f8 - br.ret.sptk b0 // Exit main path -} -;; - -GLOBAL_LIBM_END(nearbyint) -- cgit 1.4.1