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Diffstat (limited to 'ports/sysdeps/ia64/fpu/e_sqrt.S')
| -rw-r--r-- | ports/sysdeps/ia64/fpu/e_sqrt.S | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/ports/sysdeps/ia64/fpu/e_sqrt.S b/ports/sysdeps/ia64/fpu/e_sqrt.S deleted file mode 100644 index da4e8ccb6d..0000000000 --- a/ports/sysdeps/ia64/fpu/e_sqrt.S +++ /dev/null @@ -1,342 +0,0 @@ -.file "sqrt.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 -//******************************************************************** -// 02/02/00 Initial version -// 04/04/00 Unwind support added -// 08/15/00 Bundle added after call to __libm_error_support to properly -// set [the previously overwritten] GR_Parameter_RESULT. -// 02/10/03 Reordered header: .section, .global, .proc, .align -// -//******************************************************************** -// -// Function: Combined sqrt(x), where -// _ -// sqrt(x) = |x, for double precision x values -// -//******************************************************************** -// -// Accuracy: Correctly Rounded -// -//******************************************************************** -// -// Resources Used: -// -// Floating-Point Registers: f8 (Input and Return Value) -// f7 -f14 -// -// General Purpose Registers: -// r32-r36 (Locals) -// r37-r40 (Used to pass arguments to error handling routine) -// -// Predicate Registers: p6, p7, p8 -// -//********************************************************************* -// -// IEEE Special Conditions: -// -// All faults and exceptions should be raised correctly. -// sqrt(QNaN) = QNaN -// sqrt(SNaN) = QNaN -// sqrt(+/-0) = +/-0 -// sqrt(negative) = QNaN and error handling is called -// -//********************************************************************* -// -// Implementation: -// -// Modified Newton-Raphson Algorithm -// -//********************************************************************* - -GR_SAVE_PFS = r33 -GR_SAVE_B0 = r34 -GR_SAVE_GP = r35 - -GR_Parameter_X = r37 -GR_Parameter_Y = r38 -GR_Parameter_RESULT = r39 - - -.section .text -GLOBAL_IEEE754_ENTRY(sqrt) -{ .mfi - alloc r32= ar.pfs,0,5,4,0 - frsqrta.s0 f7,p6=f8 - nop.i 0 -} { .mlx - // BEGIN DOUBLE PRECISION MINIMUM LATENCY SQUARE ROOT ALGORITHM - nop.m 0 - // exponent of +1/2 in r2 - movl r2 = 0x0fffe;; -} { .mmi - // +1/2 in f9 - setf.exp f9 = r2 - nop.m 0 - nop.i 0 -} { .mlx - nop.m 0 - // 3/2 in r3 - movl r3=0x3fc00000;; -} { .mfi - setf.s f10=r3 - // Step (1) - // y0 = 1/sqrt(a) in f7 - fclass.m.unc p7,p8 = f8,0x3A - nop.i 0;; -} { .mlx - nop.m 0 - // 5/2 in r2 - movl r2 = 0x40200000 -} { .mlx - nop.m 0 - // 63/8 in r3 - movl r3 = 0x40fc0000;; -} { .mfi - setf.s f11=r2 - // Step (2) - // h = +1/2 * y0 in f6 - (p6) fma.s1 f6=f9,f7,f0 - nop.i 0 -} { .mfi - setf.s f12=r3 - // Step (3) - // g = a * y0 in f7 - (p6) fma.s1 f7=f8,f7,f0 - nop.i 0 -} { .mfi - nop.m 0 - mov f15 = f8 - nop.i 0;; -} { .mlx - nop.m 0 - // 231/16 in r2 - movl r2 = 0x41670000;; -} { .mfi - setf.s f13=r2 - // Step (4) - // e = 1/2 - g * h in f9 - (p6) fnma.s1 f9=f7,f6,f9 - nop.i 0 -} { .mlx - nop.m 0 - // 35/8 in r3 - movl r3 = 0x408c0000;; -} { .mfi - setf.s f14=r3 - // Step (5) - // S = 3/2 + 5/2 * e in f10 - (p6) fma.s1 f10=f11,f9,f10 - nop.i 0 -} { .mfi - nop.m 0 - // Step (6) - // e2 = e * e in f11 - (p6) fma.s1 f11=f9,f9,f0 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (7) - // t = 63/8 + 231/16 * e in f12 - (p6) fma.s1 f12=f13,f9,f12 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (8) - // S1 = e + e2 * S in f10 - (p6) fma.s1 f10=f11,f10,f9 - nop.i 0 -} { .mfi - nop.m 0 - // Step (9) - // e4 = e2 * e2 in f11 - (p6) fma.s1 f11=f11,f11,f0 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (10) - // t1 = 35/8 + e * t in f9 - (p6) fma.s1 f9=f9,f12,f14 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (11) - // G = g + S1 * g in f12 - (p6) fma.s1 f12=f10,f7,f7 - nop.i 0 -} { .mfi - nop.m 0 - // Step (12) - // E = g * e4 in f7 - (p6) fma.s1 f7=f7,f11,f0 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (13) - // u = S1 + e4 * t1 in f10 - (p6) fma.s1 f10=f11,f9,f10 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (14) - // g1 = G + t1 * E in f7 - (p6) fma.d.s1 f7=f9,f7,f12 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (15) - // h1 = h + u * h in f6 - (p6) fma.s1 f6=f10,f6,f6 - nop.i 0;; -} { .mfi - nop.m 0 - // Step (16) - // d = a - g1 * g1 in f9 - (p6) fnma.s1 f9=f7,f7,f8 - nop.i 0;; -} { .mfb - nop.m 0 - // Step (17) - // g2 = g1 + d * h1 in f7 - (p6) fma.d.s0 f8=f9,f6,f7 - (p6) br.ret.sptk b0 ;; -} - -{ .mfb - nop.m 0 - mov f8 = f7 - (p8) br.ret.sptk b0 ;; -} -{ .mfb - (p7) mov r40 = 49 - nop.f 0 - (p7) br.cond.sptk __libm_error_region ;; -} -// END DOUBLE PRECISION MINIMUM LATENCY SQUARE ROOT ALGORITHM -GLOBAL_IEEE754_END(sqrt) - -// Stack operations when calling error support. -// (1) (2) (3) (call) (4) -// sp -> + psp -> + psp -> + sp -> + -// | | | | -// | | <- GR_Y R3 ->| <- GR_RESULT | -> f8 -// | | | | -// | <-GR_Y Y2->| Y2 ->| <- GR_Y | -// | | | | -// | | <- GR_X X1 ->| | -// | | | | -// sp-64 -> + sp -> + sp -> + + -// save ar.pfs save b0 restore gp -// save gp restore ar.pfs - - -LOCAL_LIBM_ENTRY(__libm_error_region) - -// -// This branch includes all those special values that are not negative, -// with the result equal to frcpa(x) -// - -.prologue -// We are distinguishing between over(under)flow and letting -// __libm_error_support set ERANGE or do anything else needed. - -// (1) -{ .mfi - add GR_Parameter_Y=-32,sp // Parameter 2 value - nop.f 0 -.save ar.pfs,GR_SAVE_PFS - mov GR_SAVE_PFS=ar.pfs // Save ar.pfs -} -{ .mfi -.fframe 64 - add sp=-64,sp // Create new stack - nop.f 0 - mov GR_SAVE_GP=gp // Save gp -};; - - -// (2) -{ .mmi - stfd [GR_Parameter_Y] = f0,16 // STORE Parameter 2 on stack - add GR_Parameter_X = 16,sp // Parameter 1 address -.save b0, GR_SAVE_B0 - mov GR_SAVE_B0=b0 // Save b0 -};; - -.body -// (3) -{ .mib - stfd [GR_Parameter_X] = f15 // STORE Parameter 1 on stack - add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address - nop.b 0 -} -{ .mib - stfd [GR_Parameter_Y] = f8 // STORE Parameter 3 on stack - add GR_Parameter_Y = -16,GR_Parameter_Y - br.call.sptk b0=__libm_error_support# // Call error handling function -};; -{ .mmi - nop.m 0 - nop.m 0 - add GR_Parameter_RESULT = 48,sp -};; - -// (4) -{ .mmi - ldfd f8 = [GR_Parameter_RESULT] // Get return result off stack -.restore sp - add sp = 64,sp // Restore stack pointer - mov b0 = GR_SAVE_B0 // Restore return address -};; -{ .mib - mov gp = GR_SAVE_GP // Restore gp - mov ar.pfs = GR_SAVE_PFS // Restore ar.pfs - br.ret.sptk b0 // Return -};; - -LOCAL_LIBM_END(__libm_error_region) - - - - -.type __libm_error_support#,@function -.global __libm_error_support# |