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Diffstat (limited to 'sysdeps/ia64/fpu/e_scalb.S')
| -rw-r--r-- | sysdeps/ia64/fpu/e_scalb.S | 599 |
1 files changed, 0 insertions, 599 deletions
diff --git a/sysdeps/ia64/fpu/e_scalb.S b/sysdeps/ia64/fpu/e_scalb.S deleted file mode 100644 index 3d48aab189..0000000000 --- a/sysdeps/ia64/fpu/e_scalb.S +++ /dev/null @@ -1,599 +0,0 @@ -.file "scalb.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 -// 01/26/01 Scalb completely reworked and now standalone version -// 05/20/02 Cleaned up namespace and sf0 syntax -// 02/10/03 Reordered header: .section, .global, .proc, .align -// 08/06/03 Improved performance -// -// API -//============================================================== -// double = scalb (double x, double n) -// input floating point f8 and floating point f9 -// output floating point f8 -// -// int_type = 0 if int is 32 bits -// int_type = 1 if int is 64 bits -// -// Returns x* 2**n using an fma and detects overflow -// and underflow. -// -// -// Strategy: -// Compute biased exponent of result exp_Result = N + exp_X -// Break into ranges: -// exp_Result > 0x103fe -> Certain overflow -// exp_Result = 0x103fe -> Possible overflow -// 0x0fc01 <= exp_Result < 0x103fe -> No over/underflow (main path) -// 0x0fc01 - 52 <= exp_Result < 0x0fc01 -> Possible underflow -// exp_Result < 0x0fc01 - 52 -> Certain underflow - -FR_Big = f6 -FR_NBig = f7 -FR_Floating_X = f8 -FR_Result = f8 -FR_Floating_N = f9 -FR_Result2 = f9 -FR_Result3 = f10 -FR_Norm_X = f11 -FR_Two_N = f12 -FR_N_float_int = f13 -FR_Norm_N = f14 - -GR_neg_ov_limit= r14 -GR_big_exp = r14 -GR_N_Biased = r15 -GR_Big = r16 -GR_exp_Result = r18 -GR_pos_ov_limit= r19 -GR_exp_sure_ou = r19 -GR_Bias = r20 -GR_N_as_int = r21 -GR_signexp_X = r22 -GR_exp_X = r23 -GR_exp_mask = r24 -GR_max_exp = r25 -GR_min_exp = r26 -GR_min_den_exp = r27 -GR_Scratch = r28 -GR_signexp_N = r29 -GR_exp_N = r30 - -GR_SAVE_B0 = r32 -GR_SAVE_GP = r33 -GR_SAVE_PFS = r34 -GR_Parameter_X = r35 -GR_Parameter_Y = r36 -GR_Parameter_RESULT = r37 -GR_Tag = r38 - -.section .text -GLOBAL_IEEE754_ENTRY(scalb) - -// -// Is x NAN, INF, ZERO, +-? -// Build the exponent Bias -// -{ .mfi - getf.exp GR_signexp_N = FR_Floating_N // Get signexp of n - fclass.m p6,p0 = FR_Floating_X, 0xe7 // @snan | @qnan | @inf | @zero - mov GR_Bias = 0x0ffff -} -{ .mfi - mov GR_Big = 35000 // If N this big then certain overflow - fcvt.fx.trunc.s1 FR_N_float_int = FR_Floating_N // Get N in significand - nop.i 0 -} -;; - -{ .mfi - getf.exp GR_signexp_X = FR_Floating_X // Get signexp of x - fclass.m p7,p0 = FR_Floating_N, 0x0b // Test for n=unorm - nop.i 0 -} -// -// Normalize n -// -{ .mfi - mov GR_exp_mask = 0x1ffff // Exponent mask - fnorm.s1 FR_Norm_N = FR_Floating_N - nop.i 0 -} -;; - -// -// Is n NAN, INF, ZERO, +-? -// -{ .mfi - mov GR_big_exp = 0x1003e // Exponent at which n is integer - fclass.m p9,p0 = FR_Floating_N, 0xe7 // @snan | @qnan | @inf | @zero - mov GR_max_exp = 0x103fe // Exponent of maximum double -} -// -// Normalize x -// -{ .mfb - nop.m 0 - fnorm.s1 FR_Norm_X = FR_Floating_X -(p7) br.cond.spnt SCALB_N_UNORM // Branch if n=unorm -} -;; - -SCALB_COMMON1: -// Main path continues. Also return here from u=unorm path. -// Handle special cases if x = Nan, Inf, Zero -{ .mfb - nop.m 0 - fcmp.lt.s1 p7,p0 = FR_Floating_N, f0 // Test N negative -(p6) br.cond.spnt SCALB_NAN_INF_ZERO -} -;; - -// Handle special cases if n = Nan, Inf, Zero -{ .mfi - getf.sig GR_N_as_int = FR_N_float_int // Get n from significand - fclass.m p8,p0 = FR_Floating_X, 0x0b // Test for x=unorm - mov GR_exp_sure_ou = 0x1000e // Exp_N where x*2^N sure over/under -} -{ .mfb - mov GR_min_exp = 0x0fc01 // Exponent of minimum double - fcvt.xf FR_N_float_int = FR_N_float_int // Convert N to FP integer -(p9) br.cond.spnt SCALB_NAN_INF_ZERO -} -;; - -{ .mmi - and GR_exp_N = GR_exp_mask, GR_signexp_N // Get exponent of N -(p7) sub GR_Big = r0, GR_Big // Limit for N - nop.i 0 -} -;; - -{ .mib - cmp.lt p9,p0 = GR_exp_N, GR_big_exp // N possible non-integer? - cmp.ge p6,p0 = GR_exp_N, GR_exp_sure_ou // N certain over/under? -(p8) br.cond.spnt SCALB_X_UNORM // Branch if x=unorm -} -;; - -SCALB_COMMON2: -// Main path continues. Also return here from x=unorm path. -// Create biased exponent for 2**N -{ .mmi -(p6) mov GR_N_as_int = GR_Big // Limit N -;; - add GR_N_Biased = GR_Bias,GR_N_as_int - nop.i 0 -} -;; - -{ .mfi - setf.exp FR_Two_N = GR_N_Biased // Form 2**N -(p9) fcmp.neq.unc.s1 p9,p0 = FR_Norm_N, FR_N_float_int // Test if N an integer - and GR_exp_X = GR_exp_mask, GR_signexp_X // Get exponent of X -} -;; - -// -// Compute biased result exponent -// Branch if N is not an integer -// -{ .mib - add GR_exp_Result = GR_exp_X, GR_N_as_int - mov GR_min_den_exp = 0x0fc01 - 52 // Exponent of min denorm dble -(p9) br.cond.spnt SCALB_N_NOT_INT -} -;; - -// -// Raise Denormal operand flag with compare -// Do final operation -// -{ .mfi - cmp.lt p7,p6 = GR_exp_Result, GR_max_exp // Test no overflow - fcmp.ge.s0 p0,p11 = FR_Floating_X,FR_Floating_N // Dummy to set denorm - cmp.lt p9,p0 = GR_exp_Result, GR_min_den_exp // Test sure underflow -} -{ .mfb - nop.m 0 - fma.d.s0 FR_Result = FR_Two_N,FR_Norm_X,f0 -(p9) br.cond.spnt SCALB_UNDERFLOW // Branch if certain underflow -} -;; - -{ .mib -(p6) cmp.gt.unc p6,p8 = GR_exp_Result, GR_max_exp // Test sure overflow -(p7) cmp.ge.unc p7,p9 = GR_exp_Result, GR_min_exp // Test no over/underflow -(p7) br.ret.sptk b0 // Return from main path -} -;; - -{ .bbb -(p6) br.cond.spnt SCALB_OVERFLOW // Branch if certain overflow -(p8) br.cond.spnt SCALB_POSSIBLE_OVERFLOW // Branch if possible overflow -(p9) br.cond.spnt SCALB_POSSIBLE_UNDERFLOW // Branch if possible underflow -} -;; - -// Here if possible underflow. -// Resulting exponent: 0x0fc01-52 <= exp_Result < 0x0fc01 -SCALB_POSSIBLE_UNDERFLOW: -// -// Here if possible overflow. -// Resulting exponent: 0x103fe = exp_Result -SCALB_POSSIBLE_OVERFLOW: - -// Set up necessary status fields -// -// S0 user supplied status -// S2 user supplied status + WRE + TD (Overflows) -// S3 user supplied status + FZ + TD (Underflows) -// -{ .mfi - mov GR_pos_ov_limit = 0x103ff // Exponent for positive overflow - fsetc.s3 0x7F,0x41 - nop.i 0 -} -{ .mfi - mov GR_neg_ov_limit = 0x303ff // Exponent for negative overflow - fsetc.s2 0x7F,0x42 - nop.i 0 -} -;; - -// -// Do final operation with s2 and s3 -// -{ .mfi - setf.exp FR_NBig = GR_neg_ov_limit - fma.d.s3 FR_Result3 = FR_Two_N,FR_Norm_X,f0 - nop.i 0 -} -{ .mfi - setf.exp FR_Big = GR_pos_ov_limit - fma.d.s2 FR_Result2 = FR_Two_N,FR_Norm_X,f0 - nop.i 0 -} -;; - -// Check for overflow or underflow. -// Restore s3 -// Restore s2 -// -{ .mfi - nop.m 0 - fsetc.s3 0x7F,0x40 - nop.i 0 -} -{ .mfi - nop.m 0 - fsetc.s2 0x7F,0x40 - nop.i 0 -} -;; - -// -// Is the result zero? -// -{ .mfi - nop.m 0 - fclass.m p6, p0 = FR_Result3, 0x007 - nop.i 0 -} -{ .mfi - nop.m 0 - fcmp.ge.s1 p7, p8 = FR_Result2 , FR_Big - nop.i 0 -} -;; - -// -// Detect masked underflow - Tiny + Inexact Only -// -{ .mfi - nop.m 0 -(p6) fcmp.neq.unc.s1 p6, p0 = FR_Result , FR_Result2 - nop.i 0 -} -;; - -// -// Is result bigger the allowed range? -// Branch out for underflow -// -{ .mfb - nop.m 0 -(p8) fcmp.le.unc.s1 p9, p10 = FR_Result2 , FR_NBig -(p6) br.cond.spnt SCALB_UNDERFLOW -} -;; - -// -// Branch out for overflow -// -{ .bbb -(p7) br.cond.spnt SCALB_OVERFLOW -(p9) br.cond.spnt SCALB_OVERFLOW - br.ret.sptk b0 // Return from main path. -} -;; - -// Here if result overflows -SCALB_OVERFLOW: -{ .mib - alloc r32=ar.pfs,3,0,4,0 - addl GR_Tag = 53, r0 // Set error tag for overflow - br.cond.sptk __libm_error_region // Call error support for overflow -} -;; - -// Here if result underflows -SCALB_UNDERFLOW: -{ .mib - alloc r32=ar.pfs,3,0,4,0 - addl GR_Tag = 54, r0 // Set error tag for underflow - br.cond.sptk __libm_error_region // Call error support for underflow -} -;; - -SCALB_NAN_INF_ZERO: - -// -// Before entry, N has been converted to a fp integer in significand of -// FR_N_float_int -// -// Convert N_float_int to floating point value -// -{ .mfi - getf.sig GR_N_as_int = FR_N_float_int - fclass.m p6,p0 = FR_Floating_N, 0xc3 //@snan | @qnan - nop.i 0 -} -{ .mfi - addl GR_Scratch = 1,r0 - fcvt.xf FR_N_float_int = FR_N_float_int - nop.i 0 -} -;; - -{ .mfi - nop.m 0 - fclass.m p7,p0 = FR_Floating_X, 0xc3 //@snan | @qnan - shl GR_Scratch = GR_Scratch,63 -} -;; - -{ .mfi - nop.m 0 - fclass.m p8,p0 = FR_Floating_N, 0x21 // @inf - nop.i 0 -} -{ .mfi - nop.m 0 - fclass.m p9,p0 = FR_Floating_N, 0x22 // @-inf - nop.i 0 -} -;; - -// -// Either X or N is a Nan, return result and possible raise invalid. -// -{ .mfb - nop.m 0 -(p6) fma.d.s0 FR_Result = FR_Floating_N,FR_Floating_X,f0 -(p6) br.ret.spnt b0 -} -;; - -{ .mfb - nop.m 0 -(p7) fma.d.s0 FR_Result = FR_Floating_N,FR_Floating_X,f0 -(p7) br.ret.spnt b0 -} -;; - -// -// If N + Inf do something special -// For N = -Inf, create Int -// -{ .mfb - nop.m 0 -(p8) fma.d.s0 FR_Result = FR_Floating_X, FR_Floating_N,f0 -(p8) br.ret.spnt b0 -} -{ .mfi - nop.m 0 -(p9) fnma.d.s0 FR_Floating_N = FR_Floating_N, f1, f0 - nop.i 0 -} -;; - -// -// If N==-Inf,return x/(-N) -// -{ .mfb - cmp.ne p7,p0 = GR_N_as_int,GR_Scratch -(p9) frcpa.s0 FR_Result,p0 = FR_Floating_X,FR_Floating_N -(p9) br.ret.spnt b0 -} -;; - -// -// Is N an integer. -// -{ .mfi - nop.m 0 -(p7) fcmp.neq.unc.s1 p7,p0 = FR_Norm_N, FR_N_float_int - nop.i 0 -} -;; - -// -// If N not an int, return NaN and raise invalid. -// -{ .mfb - nop.m 0 -(p7) frcpa.s0 FR_Result,p0 = f0,f0 -(p7) br.ret.spnt b0 -} -;; - -// -// Always return x in other path. -// -{ .mfb - nop.m 0 - fma.d.s0 FR_Result = FR_Floating_X,f1,f0 - br.ret.sptk b0 -} -;; - -// Here if n not int -// Return NaN and raise invalid. -SCALB_N_NOT_INT: -{ .mfb - nop.m 0 - frcpa.s0 FR_Result,p0 = f0,f0 - br.ret.sptk b0 -} -;; - -// Here if n=unorm -SCALB_N_UNORM: -{ .mfb - getf.exp GR_signexp_N = FR_Norm_N // Get signexp of normalized n - fcvt.fx.trunc.s1 FR_N_float_int = FR_Norm_N // Get N in significand - br.cond.sptk SCALB_COMMON1 // Return to main path -} -;; - -// Here if x=unorm -SCALB_X_UNORM: -{ .mib - getf.exp GR_signexp_X = FR_Norm_X // Get signexp of normalized x - nop.i 0 - br.cond.sptk SCALB_COMMON2 // Return to main path -} -;; - -GLOBAL_IEEE754_END(scalb) -LOCAL_LIBM_ENTRY(__libm_error_region) - -// -// Get stack address of N -// -.prologue -{ .mfi - add GR_Parameter_Y=-32,sp - nop.f 0 -.save ar.pfs,GR_SAVE_PFS - mov GR_SAVE_PFS=ar.pfs -} -// -// Adjust sp -// -{ .mfi -.fframe 64 - add sp=-64,sp - nop.f 0 - mov GR_SAVE_GP=gp -};; - -// -// Store N on stack in correct position -// Locate the address of x on stack -// -{ .mmi - stfd [GR_Parameter_Y] = FR_Norm_N,16 - add GR_Parameter_X = 16,sp -.save b0, GR_SAVE_B0 - mov GR_SAVE_B0=b0 -};; - -// -// Store x on the stack. -// Get address for result on stack. -// -.body -{ .mib - stfd [GR_Parameter_X] = FR_Norm_X - add GR_Parameter_RESULT = 0,GR_Parameter_Y - nop.b 0 -} -{ .mib - stfd [GR_Parameter_Y] = FR_Result - add GR_Parameter_Y = -16,GR_Parameter_Y - br.call.sptk b0=__libm_error_support# -};; - -// -// Get location of result on stack -// -{ .mmi - add GR_Parameter_RESULT = 48,sp - nop.m 0 - nop.i 0 -};; - -// -// Get the new result -// -{ .mmi - ldfd FR_Result = [GR_Parameter_RESULT] -.restore sp - add sp = 64,sp - mov b0 = GR_SAVE_B0 -};; - -// -// Restore gp, ar.pfs and return -// -{ .mib - mov gp = GR_SAVE_GP - mov ar.pfs = GR_SAVE_PFS - br.ret.sptk b0 -};; - -LOCAL_LIBM_END(__libm_error_region) - -.type __libm_error_support#,@function -.global __libm_error_support# |