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Diffstat (limited to 'arch/ia64/lib/idiv64.S')
| -rw-r--r-- | arch/ia64/lib/idiv64.S | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/arch/ia64/lib/idiv64.S b/arch/ia64/lib/idiv64.S deleted file mode 100644 index 5c9113691f..0000000000 --- a/arch/ia64/lib/idiv64.S +++ /dev/null @@ -1,83 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Copyright (C) 1999-2000 Hewlett-Packard Co - * Copyright (C) 1999-2000 David Mosberger-Tang <davidm@hpl.hp.com> - * - * 64-bit integer division. - * - * This code is based on the application note entitled "Divide, Square Root - * and Remainder Algorithms for the IA-64 Architecture". This document - * is available as Intel document number 248725-002 or via the web at - * http://developer.intel.com/software/opensource/numerics/ - * - * For more details on the theory behind these algorithms, see "IA-64 - * and Elementary Functions" by Peter Markstein; HP Professional Books - * (http://www.goodreads.com/book/show/2019887.Ia_64_and_Elementary_Functions) - */ - -#include <linux/export.h> -#include <asm/asmmacro.h> - -#ifdef MODULO -# define OP mod -#else -# define OP div -#endif - -#ifdef UNSIGNED -# define SGN u -# define INT_TO_FP(a,b) fcvt.xuf.s1 a=b -# define FP_TO_INT(a,b) fcvt.fxu.trunc.s1 a=b -#else -# define SGN -# define INT_TO_FP(a,b) fcvt.xf a=b -# define FP_TO_INT(a,b) fcvt.fx.trunc.s1 a=b -#endif - -#define PASTE1(a,b) a##b -#define PASTE(a,b) PASTE1(a,b) -#define NAME PASTE(PASTE(__,SGN),PASTE(OP,di3)) - -GLOBAL_ENTRY(NAME) - .regstk 2,0,0,0 - // Transfer inputs to FP registers. - setf.sig f8 = in0 - setf.sig f9 = in1 - ;; - // Convert the inputs to FP, to avoid FP software-assist faults. - INT_TO_FP(f8, f8) - INT_TO_FP(f9, f9) - ;; - frcpa.s1 f11, p6 = f8, f9 // y0 = frcpa(b) - ;; -(p6) fmpy.s1 f7 = f8, f11 // q0 = a*y0 -(p6) fnma.s1 f6 = f9, f11, f1 // e0 = -b*y0 + 1 - ;; -(p6) fma.s1 f10 = f7, f6, f7 // q1 = q0*e0 + q0 -(p6) fmpy.s1 f7 = f6, f6 // e1 = e0*e0 - ;; -#ifdef MODULO - sub in1 = r0, in1 // in1 = -b -#endif -(p6) fma.s1 f10 = f10, f7, f10 // q2 = q1*e1 + q1 -(p6) fma.s1 f6 = f11, f6, f11 // y1 = y0*e0 + y0 - ;; -(p6) fma.s1 f6 = f6, f7, f6 // y2 = y1*e1 + y1 -(p6) fnma.s1 f7 = f9, f10, f8 // r = -b*q2 + a - ;; -#ifdef MODULO - setf.sig f8 = in0 // f8 = a - setf.sig f9 = in1 // f9 = -b -#endif -(p6) fma.s1 f11 = f7, f6, f10 // q3 = r*y2 + q2 - ;; - FP_TO_INT(f11, f11) // q = trunc(q3) - ;; -#ifdef MODULO - xma.l f11 = f11, f9, f8 // r = q*(-b) + a - ;; -#endif - getf.sig r8 = f11 // transfer result to result register - br.ret.sptk.many rp -END(NAME) -EXPORT_SYMBOL(NAME) |