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|
/*
Copyright (c) 2014, Intel Corporation
All rights reserved.
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.
* Neither the name of Intel Corporation nor the names of its contributors
* may 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 THE COPYRIGHT OWNER OR 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.
*/
/******************************************************************************/
// ALGORITHM DESCRIPTION
// ---------------------
//
// This implementation uses the main path for |x| in [2^{-5},2^65).
// For |x| in [2^{-64},2^{-5}), a secondary path is used.
// For the biased exponent of X within 3FFH-64 and 3FF+64, we use one branch.
// We use the following definition of B and X` so that the formula
// atan(X) = Tau + atan( (X`-B) / (One + BX) ) is correct
//
// X = (-1)^s * 2^k * 1. x1 x2 ... x52
//
// Define X` = 0 if k >= 5; and X` = |X| otherwise
// Define One = 0 if k >= 5; and One = 1 otherwise
// Define B = 0 if k <= -6; B = 2^k * 1.x1 x2 x3 x4 1 if -5 <= k <= 4
// Define B = 2^5 * 1.0 0 ... 0 if k >= 5
//
// Tau is 0 if k <= -6;
// Tau is atan( B ) if -5 <= k <= 4
// Tau is pi/2 if k >= 5
//
// Special cases:
// atan(NaN) = quiet NaN
// atan(+/-INF) = +/-Pi/2
// atan(+/-0) = +/-0
//
/******************************************************************************/
#include <private/bionic_asm.h>
# -- Begin atan
ENTRY(atan)
# parameter 1: %xmm0
..B1.1:
..___tag_value_atan.1:
pushq %rsi
..___tag_value_atan.3:
movsd %xmm0, (%rsp)
..B1.2:
movq $0xffff000000000000, %r8
movd %r8, %xmm3
movq ONEMASK(%rip), %xmm5
movq $0x800000000000, %r9
movd %r9, %xmm4
pextrw $3, %xmm0, %edx
andpd %xmm0, %xmm3
pshufd $68, %xmm0, %xmm1
orpd %xmm4, %xmm3
movl %edx, %eax
andl $32767, %edx
subl $16288, %edx
cmpl $159, %edx
ja .L_2TAG_PACKET_0.0.1
mulsd %xmm3, %xmm1
subsd %xmm3, %xmm0
addsd %xmm5, %xmm1
divsd %xmm1, %xmm0
addl $1, %edx
movq a2(%rip), %xmm2
movq b2(%rip), %xmm4
andl $32768, %eax
xorpd %xmm7, %xmm7
pinsrw $3, %eax, %xmm7
addl %edx, %edx
lea atan_tbl(%rip), %r8
movq (%r8,%rdx,8), %xmm6
movq 8(%r8,%rdx,8), %xmm5
xorpd %xmm7, %xmm5
xorpd %xmm7, %xmm6
movq 8+a2(%rip), %xmm7
movddup %xmm0, %xmm1
mulsd %xmm0, %xmm0
movddup %xmm1, %xmm3
addsd %xmm6, %xmm1
mulsd %xmm0, %xmm2
addsd %xmm0, %xmm4
subsd %xmm1, %xmm6
mulsd %xmm0, %xmm4
addsd %xmm7, %xmm2
mulsd %xmm3, %xmm0
addsd %xmm3, %xmm6
mulsd %xmm2, %xmm0
addsd 8+b2(%rip), %xmm4
addsd %xmm5, %xmm6
mulsd %xmm4, %xmm0
addsd %xmm6, %xmm0
addsd %xmm1, %xmm0
jmp .L_2TAG_PACKET_1.0.1
.L_2TAG_PACKET_0.0.1:
addl $944, %edx
cmpl $1103, %edx
ja .L_2TAG_PACKET_2.0.1
movq a2(%rip), %xmm4
movq b2(%rip), %xmm7
movq (%rsp), %xmm0
mulsd %xmm1, %xmm1
movq 8+a2(%rip), %xmm2
movq 8+b2(%rip), %xmm5
mulsd %xmm1, %xmm4
addsd %xmm1, %xmm7
movq %xmm1, %xmm6
mulsd %xmm0, %xmm1
addsd %xmm4, %xmm2
mulsd %xmm6, %xmm7
mulsd %xmm1, %xmm2
addsd %xmm5, %xmm7
mulsd %xmm7, %xmm2
addsd %xmm2, %xmm0
jmp .L_2TAG_PACKET_1.0.1
.L_2TAG_PACKET_2.0.1:
addl $15344, %edx
cmpl $16368, %edx
ja .L_2TAG_PACKET_3.0.1
movq (%rsp), %xmm0
movq (%rsp), %xmm1
cmpl $16, %edx
jae .L_2TAG_PACKET_1.0.1
mulsd %xmm0, %xmm1
jmp .L_2TAG_PACKET_1.0.1
.L_2TAG_PACKET_3.0.1:
cmpl $17392, %edx
jae .L_2TAG_PACKET_4.0.1
movq $0xbff0000000000000, %r8
movd %r8, %xmm1
divsd %xmm0, %xmm1
movq a2(%rip), %xmm2
movq b2(%rip), %xmm4
andl $32768, %eax
xorpd %xmm7, %xmm7
pinsrw $3, %eax, %xmm7
addl %edx, %edx
movq pi_table(%rip), %xmm6
movq 8+pi_table(%rip), %xmm5
xorpd %xmm7, %xmm5
xorpd %xmm7, %xmm6
movq 8+a2(%rip), %xmm7
movddup %xmm1, %xmm0
mulsd %xmm1, %xmm1
movddup %xmm0, %xmm3
addsd %xmm6, %xmm0
mulsd %xmm1, %xmm2
addsd %xmm1, %xmm4
subsd %xmm0, %xmm6
mulsd %xmm1, %xmm4
addsd %xmm7, %xmm2
mulsd %xmm3, %xmm1
addsd %xmm3, %xmm6
mulsd %xmm2, %xmm1
addsd 8+b2(%rip), %xmm4
addsd %xmm5, %xmm6
mulsd %xmm4, %xmm1
addsd %xmm6, %xmm1
addsd %xmm1, %xmm0
jmp .L_2TAG_PACKET_1.0.1
.L_2TAG_PACKET_4.0.1:
movq (%rsp), %xmm4
movq SGNMASK(%rip), %xmm0
movq pi_table(%rip), %xmm2
movq 8+pi_table(%rip), %xmm3
movd %xmm1, %eax
psrlq $32, %xmm1
movd %xmm1, %edx
andl $2147483647, %edx
cmpl $2146435072, %edx
jae .L_2TAG_PACKET_5.0.1
.L_2TAG_PACKET_6.0.1:
andnpd %xmm4, %xmm0
orpd %xmm0, %xmm2
orpd %xmm3, %xmm0
addsd %xmm2, %xmm0
jmp .L_2TAG_PACKET_1.0.1
.L_2TAG_PACKET_5.0.1:
subl $2146435072, %edx
orl %edx, %eax
cmpl $0, %eax
je .L_2TAG_PACKET_6.0.1
movq %xmm4, %xmm0
addsd %xmm0, %xmm0
.L_2TAG_PACKET_1.0.1:
..B1.3:
popq %rcx
..___tag_value_atan.4:
ret
..___tag_value_atan.5:
END(atan)
# -- End atan
.section .rodata, "a"
.align 4
.align 4
ONEMASK:
.long 0
.long 1072693248
.type ONEMASK,@object
.size ONEMASK,8
.align 4
a2:
.long 2006262985
.long 1069310863
.long 2358449471
.long 3217342131
.type a2,@object
.size a2,16
.align 4
b2:
.long 3845454352
.long 1069952297
.long 2829679149
.long 1073771565
.type b2,@object
.size b2,16
.align 4
atan_tbl:
.long 0
.long 0
.long 0
.long 0
.long 3819695742
.long 1067482761
.long 2398680355
.long 3155462074
.long 2998791009
.long 1067548225
.long 3868465248
.long 3157182472
.long 3339424991
.long 1067613680
.long 3296670360
.long 1010752543
.long 2710002256
.long 1067679126
.long 3403896007
.long 1010910768
.long 3275701428
.long 1067744562
.long 119959933
.long 1011482843
.long 2908636881
.long 1067809988
.long 2464489612
.long 1011545526
.long 3777889398
.long 1067875403
.long 3262682165
.long 1009703919
.long 3759667419
.long 1067940807
.long 1838130851
.long 3157373556
.long 732369940
.long 1068006200
.long 1203428313
.long 1010055371
.long 1166616461
.long 1068071580
.long 2901274051
.long 3158549977
.long 2945472892
.long 1068136947
.long 3726120658
.long 1009762715
.long 3954480976
.long 1068202301
.long 1289173457
.long 1009429861
.long 2081752829
.long 1068267642
.long 1836909874
.long 1006212095
.long 3807999788
.long 1068332968
.long 2172459940
.long 3156162078
.long 2731789884
.long 1068398280
.long 3450718392
.long 3159216547
.long 1044477961
.long 1068463577
.long 2230553229
.long 1011424339
.long 1486930287
.long 1068530218
.long 2861547474
.long 1012041376
.long 2293016881
.long 1068595466
.long 136843272
.long 1012684797
.long 201518157
.long 1068660680
.long 63231984
.long 1012427198
.long 4054234584
.long 1068725856
.long 3927006960
.long 1011878955
.long 1246477213
.long 1068790995
.long 1494265652
.long 3155219350
.long 678186699
.long 1068856093
.long 1264361424
.long 3159256693
.long 2690594995
.long 1068921148
.long 3906996379
.long 1009288267
.long 3362611517
.long 1068986159
.long 1650970041
.long 3158331771
.long 3102162111
.long 1069051124
.long 365917035
.long 3160264153
.long 2352611067
.long 1069116041
.long 4008970190
.long 3159478182
.long 1594134794
.long 1069180908
.long 466690178
.long 1012526501
.long 1345079306
.long 1069245723
.long 2268273568
.long 3160164092
.long 2163300970
.long 1069310484
.long 2750834800
.long 3158113482
.long 352522716
.long 1069375190
.long 1750411372
.long 1011790845
.long 848541647
.long 1069439838
.long 2164207573
.long 1011698350
.long 40647312
.long 1069504427
.long 2949165434
.long 3159107267
.long 2216766270
.long 1069574357
.long 2197920765
.long 3161055954
.long 1090914384
.long 1069638757
.long 2330454674
.long 1013365998
.long 387601244
.long 1069703022
.long 3185681168
.long 1013434071
.long 3991640484
.long 1069767144
.long 1313211590
.long 3161087959
.long 3322489502
.long 1069831118
.long 3013977995
.long 1013053011
.long 3121698570
.long 1069894936
.long 4069015667
.long 1013023362
.long 4289964660
.long 1069958591
.long 1736191156
.long 3158266731
.long 3903312386
.long 1070022077
.long 1833592413
.long 3159731471
.long 3818449864
.long 1070085387
.long 851036429
.long 3159730451
.long 2097480306
.long 1070148515
.long 3506390884
.long 3160462302
.long 1611694502
.long 1070211454
.long 2785735540
.long 3160465144
.long 1464694796
.long 1070274198
.long 4229277299
.long 3159907000
.long 1299612775
.long 1070336741
.long 4116653788
.long 3160427739
.long 1310544789
.long 1070399077
.long 1064430331
.long 1013218202
.long 2253168030
.long 1070461200
.long 1405044609
.long 3157623179
.long 1159567373
.long 1070523105
.long 2353445521
.long 3159992176
.long 1359373750
.long 1070605818
.long 1748171336
.long 3161879263
.long 908341706
.long 1070667034
.long 3372710815
.long 3161775245
.long 1743027350
.long 1070727765
.long 687089934
.long 3160507171
.long 2055355646
.long 1070787992
.long 2392855242
.long 1013682469
.long 690426164
.long 1070847697
.long 1103926666
.long 1014052810
.long 1483247847
.long 1070906862
.long 2082645847
.long 3161345479
.long 392040270
.long 1070965472
.long 2407720023
.long 1014053754
.long 2673846014
.long 1071023511
.long 1293605532
.long 3158464385
.long 1384215810
.long 1071080967
.long 2446095872
.long 3159216407
.long 3101660631
.long 1071137826
.long 698040758
.long 1014855328
.long 2094057058
.long 1071194078
.long 2282048339
.long 1014040385
.long 1712750594
.long 1071249712
.long 1204372378
.long 3162276464
.long 1411515787
.long 1071304719
.long 949080808
.long 1015006403
.long 931538085
.long 1071359091
.long 3027127039
.long 1014307233
.long 179139065
.long 1071412821
.long 4285547492
.long 3161934731
.long 3387721259
.long 1071465902
.long 373225773
.long 1013486625
.long 2132236852
.long 1071544299
.long 3250533429
.long 1014031677
.long 1942070284
.long 1071645596
.long 1237964179
.long 3163239113
.long 1532707802
.long 1071695380
.long 330645583
.long 1012495610
.long 2294184979
.long 1071743834
.long 3959472897
.long 1015833116
.long 3805060714
.long 1071790961
.long 2671256142
.long 1013727772
.long 2215037898
.long 1071836770
.long 2683359117
.long 1015831902
.long 483661594
.long 1071881273
.long 836288326
.long 3162648643
.long 1534679894
.long 1071924486
.long 373258696
.long 3162470096
.long 1538714628
.long 1071966430
.long 3199433068
.long 1015325501
.long 527642555
.long 1072007128
.long 3636832592
.long 3161843145
.long 291339150
.long 1072046605
.long 890169537
.long 3160586117
.long 2450210201
.long 1072084888
.long 1636353294
.long 3163193400
.long 2411367951
.long 1072122007
.long 374899873
.long 1011331750
.long 681549971
.long 1072157992
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.long 1072275456
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.long 3206124665
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.long 624461478
.long 1072500450
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.long 1037911952
.long 3163527627
.long 1110773639
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.long 2371517912
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.long 2731408428
.long 3162895795
.long 1911329388
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.long 1773089615
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.long 1016224052
.long 3657429030
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.long 1015966402
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.long 2333399254
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.long 2701510318
.long 1016178092
.long 453379037
.long 1072798965
.long 4046344253
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.long 1942345162
.long 1072818388
.long 621134147
.long 1016335195
.long 4210176273
.long 1072842164
.long 2701013387
.long 3164326619
.long 4185644010
.long 1072863795
.long 4163699341
.long 1016203112
.long 679688788
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.long 4147276762
.long 1014066750
.long 29432865
.long 1072901630
.long 970415797
.long 1016902063
.long 4070721092
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.long 2539004411
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.long 2252468843
.long 1072933561
.long 3424082887
.long 3163407177
.long 2929724825
.long 1072947712
.long 3661482235
.long 3163846989
.long 1377513368
.long 1072960824
.long 3987926680
.long 1013647908
.long 1031632908
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.long 1016614619
.long 2516508130
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.long 545855020
.long 3162728930
.long 3792452178
.long 1072994923
.long 3420119467
.long 1016471430
.long 3147791459
.long 1073004818
.long 1342204979
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.long 1073014090
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.long 1686389560
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.long 1243608109
.long 3161592122
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.long 398584912
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.long 1073194509
.long 1873745539
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.long 1073198808
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.long 1486904578
.long 1073202745
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.long 385353253
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.long 1014887155
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.long 1221361475
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.long 3382476563
.long 1014936138
.long 2077323573
.long 1073218307
.long 1005121005
.long 3164430752
.long 215611373
.long 1073220790
.long 353198764
.long 3164485137
.long 2347419265
.long 1073223110
.long 1103143360
.long 1016542137
.long 1379112765
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.long 3162870833
.long 3891198463
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.long 1771275754
.long 1014654681
.long 3395914051
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.long 2350900914
.long 3164013978
.long 2799919478
.long 1073235146
.long 2893950164
.long 3163260901
.long 1138673476
.long 1073238045
.long 2622204785
.long 3164174388
.long 3408855940
.long 1073240661
.long 2800881650
.long 1016008624
.long 2044858738
.long 1073243035
.long 604544785
.long 1017022901
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.long 1073245198
.long 2557332925
.long 1016135165
.long 4196285314
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.long 2032365307
.long 1016194735
.long 224877747
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.long 497926916
.long 1016947111
.long 3271386490
.long 1073250671
.long 2689994846
.long 1016631513
.long 813635989
.long 1073252221
.long 747035277
.long 3164530136
.long 369829519
.long 1073253658
.long 2182033858
.long 3163190340
.long 1187679052
.long 1073254994
.long 673954443
.long 1016149821
.long 4232586098
.long 1073256239
.long 497775200
.long 3162179015
.long 426690558
.long 1073257404
.long 3063343247
.long 1016865578
.long 1624065902
.long 1073258494
.long 1354224996
.long 3163503778
.long 1413754136
.long 1073291771
.long 856972295
.long 1016178214
.type atan_tbl,@object
.size atan_tbl,2592
.align 4
pi_table:
.long 1413754136
.long 1073291771
.long 856972295
.long 1016178214
.type pi_table,@object
.size pi_table,16
.align 4
SGNMASK:
.long 4294967295
.long 2147483647
.type SGNMASK,@object
.size SGNMASK,8
.data
.section .note.GNU-stack, ""
// -- Begin DWARF2 SEGMENT .eh_frame
.section .eh_frame,"a",@progbits
.eh_frame_seg:
.align 1
.4byte 0x00000014
.8byte 0x00527a0100000000
.8byte 0x08070c1b01107801
.4byte 0x00000190
.4byte 0x0000001c
.4byte 0x0000001c
.4byte ..___tag_value_atan.1-.
.4byte ..___tag_value_atan.5-..___tag_value_atan.1
.2byte 0x0400
.4byte ..___tag_value_atan.3-..___tag_value_atan.1
.2byte 0x100e
.byte 0x04
.4byte ..___tag_value_atan.4-..___tag_value_atan.3
.2byte 0x080e
.byte 0x00
# End
|
