.file "log.s" // Copyright (C) 2000, 2001, Intel Corporation // All rights reserved. // // Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story, // and Ping Tak Peter Tang of the Computational Software Lab, 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://developer.intel.com/opensource. // // History //============================================================== // 2/02/00 Initial version // 4/04/00 Unwind support added // 6/16/00 Updated table to be rounded correctly // 8/15/00 Bundle added after call to __libm_error_support to properly // set [the previously overwritten] GR_Parameter_RESULT. // 8/17/00 Improved speed of main path by 5 cycles // Shortened path for x=1.0 // 1/09/01 Improved speed, fixed flags for neg denormals // // // API //============================================================== // double log(double) // double log10(double) // // Overview of operation //============================================================== // Background // // Consider x = 2^N 1.f1 f2 f3 f4...f63 // Log(x) = log(frcpa(x) x/frcpa(x)) // = log(1/frcpa(x)) + log(frcpa(x) x) // = -log(frcpa(x)) + log(frcpa(x) x) // // frcpa(x) = 2^-N frcpa((1.f1 f2 ... f63) // // -log(frcpa(x)) = -log(C) // = -log(2^-N) - log(frcpa(1.f1 f2 ... f63)) // // -log(frcpa(x)) = -log(C) // = +Nlog2 - log(frcpa(1.f1 f2 ... f63)) // // -log(frcpa(x)) = -log(C) // = +Nlog2 + log(frcpa(1.f1 f2 ... f63)) // // Log(x) = log(1/frcpa(x)) + log(frcpa(x) x) // Log(x) = +Nlog2 + log(1./frcpa(1.f1 f2 ... f63)) + log(frcpa(x) x) // Log(x) = +Nlog2 - log(/frcpa(1.f1 f2 ... f63)) + log(frcpa(x) x) // Log(x) = +Nlog2 + T + log(frcpa(x) x) // // Log(x) = +Nlog2 + T + log(C x) // // Cx = 1 + r // // Log(x) = +Nlog2 + T + log(1+r) // Log(x) = +Nlog2 + T + Series( r - r^2/2 + r^3/3 - r^4/4 ....) // // 1.f1 f2 ... f8 has 256 entries. // They are 1 + k/2^8, k = 0 ... 255 // These 256 values are the table entries. // // Implementation //=============== // CASE 1: |x-1| >= 2^-6 // C = frcpa(x) // r = C * x - 1 // // Form rseries = r + P1*r^2 + P2*r^3 + P3*r^4 + P4*r^5 + P5*r^6 // // x = f * 2*n where f is 1.f_1f_2f_3....f_63 // Nfloat = float(n) where n is the true unbiased exponent // pre-index = f_1f_2....f_8 // index = pre_index * 16 // get the dxt table entry at index + offset = T // // result = (T + Nfloat * log(2)) + rseries // // The T table is calculated as follows // Form x_k = 1 + k/2^8 where k goes from 0... 255 // y_k = frcpa(x_k) // log(1/y_k) in quad and round to double-extended // CASE 2: |x-1| < 2^-6 // w = x - 1 // // Form wseries = w + Q1*w^2 + Q2*w^3 + ... + Q7*w^8 + Q8*w^9 // // result = wseries // Special values //============================================================== // log(+0) = -inf // log(-0) = -inf // log(+qnan) = +qnan // log(-qnan) = -qnan // log(+snan) = +qnan // log(-snan) = -qnan // log(-n) = QNAN Indefinite // log(-inf) = QNAN Indefinite // log(+inf) = +inf // Registers used //============================================================== // Floating Point registers used: // f8, input // f9 -> f15, f32 -> f68 // General registers used: // r32 -> r51 // Predicate registers used: // p6 -> p15 // p8 log base e // p6 log base e special // p9 used in the frcpa // p13 log base e large W // p14 log base e small w // p7 log base 10 // p10 log base 10 large W // p11 log base 10 small w // p12 log base 10 special #include "libm_support.h" // Assembly macros //============================================================== log_int_Nfloat = f9 log_Nfloat = f10 log_P5 = f11 log_P4 = f12 log_P3 = f13 log_P2 = f14 log_half = f15 log_log2 = f32 log_T = f33 log_rp_p4 = f34 log_rp_p32 = f35 log_rp_p2 = f36 log_w6 = f37 log_rp_p10 = f38 log_rcube = f39 log_rsq = f40 log_T_plus_Nlog2 = f41 log_w3 = f42 log_r = f43 log_C = f44 log_w = f45 log_Q8 = f46 log_Q7 = f47 log_Q4 = f48 log_Q3 = f49 log_Q6 = f50 log_Q5 = f51 log_Q2 = f52 log_Q1 = f53 log_P1 = f53 log_rp_q7 = f54 log_rp_q65 = f55 log_Qlo = f56 log_rp_q3 = f57 log_rp_q21 = f58 log_Qhi = f59 log_wsq = f60 log_w4 = f61 log_Q = f62 log_inv_ln10 = f63 log_log10_hi = f64 log_log10_lo = f65 log_rp_q10 = f66 log_NORM_f8 = f67 log_r2P_r = f68 // =================================== log_GR_exp_17_ones = r33 log_GR_exp_16_ones = r34 log_GR_exp_f8 = r35 log_GR_signexp_f8 = r36 log_GR_true_exp_f8 = r37 log_GR_significand_f8 = r38 log_GR_half_exp = r39 log_GR_index = r39 log_AD_1 = r40 log_GR_signexp_w = r41 log_GR_fff9 = r42 log_AD_2 = r43 log_GR_exp_w = r44 GR_SAVE_B0 = r45 GR_SAVE_GP = r46 GR_SAVE_PFS = r47 GR_Parameter_X = r48 GR_Parameter_Y = r49 GR_Parameter_RESULT = r50 log_GR_tag = r51 // Data tables //============================================================== #ifdef _LIBC .rodata #else .data #endif .align 16 log_table_1: ASM_TYPE_DIRECTIVE(log_table_1,@object) data8 0xBFC5555DA7212371 // P5 data8 0x3FC999A19EEF5826 // P4 data8 0x3FBC756AC654273B // Q8 data8 0xBFC001A42489AB4D // Q7 data8 0x3FC99999999A169B // Q4 data8 0xBFD00000000019AC // Q3 ASM_SIZE_DIRECTIVE(log_table_1) log_table_2: ASM_TYPE_DIRECTIVE(log_table_2,@object) data8 0xBFCFFFFFFFFEF009 // P3 data8 0x3FD555555554ECB2 // P2 data8 0x3FC2492479AA0DF8 // Q6 data8 0xBFC5555544986F52 // Q5 data8 0x3FD5555555555555 // Q2 data8 0xBFE0000000000000 // Q1, P1 = -0.5 data8 0xde5bd8a937287195, 0x00003ffd // double-extended 1/ln(10) data8 0xb17217f7d1cf79ac, 0x00003ffe // log2 // b17217f7d1cf79ab c9e3b39803f2f6a data8 0x80200aaeac44ef38 , 0x00003ff6 // log(1/frcpa(1+ 0/2^-8)) data8 0xc09090a2c35aa070 , 0x00003ff7 // log(1/frcpa(1+ 1/2^-8)) data8 0xa0c94fcb41977c75 , 0x00003ff8 // log(1/frcpa(1+ 2/2^-8)) data8 0xe18b9c263af83301 , 0x00003ff8 // log(1/frcpa(1+ 3/2^-8)) data8 0x8d35c8d6399c30ea , 0x00003ff9 // log(1/frcpa(1+ 4/2^-8)) data8 0xadd4d2ecd601cbb8 , 0x00003ff9 // log(1/frcpa(1+ 5/2^-8)) data8 0xce95403a192f9f01 , 0x00003ff9 // log(1/frcpa(1+ 6/2^-8)) data8 0xeb59392cbcc01096 , 0x00003ff9 // log(1/frcpa(1+ 7/2^-8)) data8 0x862c7d0cefd54c5d , 0x00003ffa // log(1/frcpa(1+ 8/2^-8)) data8 0x94aa63c65e70d499 , 0x00003ffa // log(1/frcpa(1+ 9/2^-8)) data8 0xa54a696d4b62b382 , 0x00003ffa // log(1/frcpa(1+ 10/2^-8)) data8 0xb3e4a796a5dac208 , 0x00003ffa // log(1/frcpa(1+ 11/2^-8)) data8 0xc28c45b1878340a9 , 0x00003ffa // log(1/frcpa(1+ 12/2^-8)) data8 0xd35c55f39d7a6235 , 0x00003ffa // log(1/frcpa(1+ 13/2^-8)) data8 0xe220f037b954f1f5 , 0x00003ffa // log(1/frcpa(1+ 14/2^-8)) data8 0xf0f3389b036834f3 , 0x00003ffa // log(1/frcpa(1+ 15/2^-8)) data8 0xffd3488d5c980465 , 0x00003ffa // log(1/frcpa(1+ 16/2^-8)) data8 0x87609ce2ed300490 , 0x00003ffb // log(1/frcpa(1+ 17/2^-8)) data8 0x8ede9321e8c85927 , 0x00003ffb // log(1/frcpa(1+ 18/2^-8)) data8 0x96639427f2f8e2f4 , 0x00003ffb // log(1/frcpa(1+ 19/2^-8)) data8 0x9defad3e8f73217b , 0x00003ffb // log(1/frcpa(1+ 20/2^-8)) data8 0xa582ebd50097029c , 0x00003ffb // log(1/frcpa(1+ 21/2^-8)) data8 0xac06dbe75ab80fee , 0x00003ffb // log(1/frcpa(1+ 22/2^-8)) data8 0xb3a78449b2d3ccca , 0x00003ffb // log(1/frcpa(1+ 23/2^-8)) data8 0xbb4f79635ab46bb2 , 0x00003ffb // log(1/frcpa(1+ 24/2^-8)) data8 0xc2fec93a83523f3f , 0x00003ffb // log(1/frcpa(1+ 25/2^-8)) data8 0xc99af2eaca4c4571 , 0x00003ffb // log(1/frcpa(1+ 26/2^-8)) data8 0xd1581106472fa653 , 0x00003ffb // log(1/frcpa(1+ 27/2^-8)) data8 0xd8002560d4355f2e , 0x00003ffb // log(1/frcpa(1+ 28/2^-8)) data8 0xdfcb43b4fe508632 , 0x00003ffb // log(1/frcpa(1+ 29/2^-8)) data8 0xe67f6dff709d4119 , 0x00003ffb // log(1/frcpa(1+ 30/2^-8)) data8 0xed393b1c22351280 , 0x00003ffb // log(1/frcpa(1+ 31/2^-8)) data8 0xf5192bff087bcc35 , 0x00003ffb // log(1/frcpa(1+ 32/2^-8)) data8 0xfbdf4ff6dfef2fa3 , 0x00003ffb // log(1/frcpa(1+ 33/2^-8)) data8 0x81559a97f92f9cc7 , 0x00003ffc // log(1/frcpa(1+ 34/2^-8)) data8 0x84be72bce90266e8 , 0x00003ffc // log(1/frcpa(1+ 35/2^-8)) data8 0x88bc74113f23def2 , 0x00003ffc // log(1/frcpa(1+ 36/2^-8)) data8 0x8c2ba3edf6799d11 , 0x00003ffc // log(1/frcpa(1+ 37/2^-8)) data8 0x8f9dc92f92ea08b1 , 0x00003ffc // log(1/frcpa(1+ 38/2^-8)) data8 0x9312e8f36efab5a7 , 0x00003ffc // log(1/frcpa(1+ 39/2^-8)) data8 0x968b08643409ceb6 , 0x00003ffc // log(1/frcpa(1+ 40/2^-8)) data8 0x9a062cba08a1708c , 0x00003ffc // log(1/frcpa(1+ 41/2^-8)) data8 0x9d845b3abf95485c , 0x00003ffc // log(1/frcpa(1+ 42/2^-8)) data8 0xa06fd841bc001bb4 , 0x00003ffc // log(1/frcpa(1+ 43/2^-8)) data8 0xa3f3a74652fbe0db , 0x00003ffc // log(1/frcpa(1+ 44/2^-8)) data8 0xa77a8fb2336f20f5 , 0x00003ffc // log(1/frcpa(1+ 45/2^-8)) data8 0xab0497015d28b0a0 , 0x00003ffc // log(1/frcpa(1+ 46/2^-8)) data8 0xae91c2be6ba6a615 , 0x00003ffc // log(1/frcpa(1+ 47/2^-8)) data8 0xb189d1b99aebb20b , 0x00003ffc // log(1/frcpa(1+ 48/2^-8)) data8 0xb51cced5de9c1b2c , 0x00003ffc // log(1/frcpa(1+ 49/2^-8)) data8 0xb819bee9e720d42f , 0x00003ffc // log(1/frcpa(1+ 50/2^-8)) data8 0xbbb2a0947b093a5d , 0x00003ffc // log(1/frcpa(1+ 51/2^-8)) data8 0xbf4ec1505811684a , 0x00003ffc // log(1/frcpa(1+ 52/2^-8)) data8 0xc2535bacfa8975ff , 0x00003ffc // log(1/frcpa(1+ 53/2^-8)) data8 0xc55a3eafad187eb8 , 0x00003ffc // log(1/frcpa(1+ 54/2^-8)) data8 0xc8ff2484b2c0da74 , 0x00003ffc // log(1/frcpa(1+ 55/2^-8)) data8 0xcc0b1a008d53ab76 , 0x00003ffc // log(1/frcpa(1+ 56/2^-8)) data8 0xcfb6203844b3209b , 0x00003ffc // log(1/frcpa(1+ 57/2^-8)) data8 0xd2c73949a47a19f5 , 0x00003ffc // log(1/frcpa(1+ 58/2^-8)) data8 0xd5daae18b49d6695 , 0x00003ffc // log(1/frcpa(1+ 59/2^-8)) data8 0xd8f08248cf7e8019 , 0x00003ffc // log(1/frcpa(1+ 60/2^-8)) data8 0xdca7749f1b3e540e , 0x00003ffc // log(1/frcpa(1+ 61/2^-8)) data8 0xdfc28e033aaaf7c7 , 0x00003ffc // log(1/frcpa(1+ 62/2^-8)) data8 0xe2e012a5f91d2f55 , 0x00003ffc // log(1/frcpa(1+ 63/2^-8)) data8 0xe600064ed9e292a8 , 0x00003ffc // log(1/frcpa(1+ 64/2^-8)) data8 0xe9226cce42b39f60 , 0x00003ffc // log(1/frcpa(1+ 65/2^-8)) data8 0xec4749fd97a28360 , 0x00003ffc // log(1/frcpa(1+ 66/2^-8)) data8 0xef6ea1bf57780495 , 0x00003ffc // log(1/frcpa(1+ 67/2^-8)) data8 0xf29877ff38809091 , 0x00003ffc // log(1/frcpa(1+ 68/2^-8)) data8 0xf5c4d0b245cb89be , 0x00003ffc // log(1/frcpa(1+ 69/2^-8)) data8 0xf8f3afd6fcdef3aa , 0x00003ffc // log(1/frcpa(1+ 70/2^-8)) data8 0xfc2519756be1abc7 , 0x00003ffc // log(1/frcpa(1+ 71/2^-8)) data8 0xff59119f503e6832 , 0x00003ffc // log(1/frcpa(1+ 72/2^-8)) data8 0x8147ce381ae0e146 , 0x00003ffd // log(1/frcpa(1+ 73/2^-8)) data8 0x82e45f06cb1ad0f2 , 0x00003ffd // log(1/frcpa(1+ 74/2^-8)) data8 0x842f5c7c573cbaa2 , 0x00003ffd // log(1/frcpa(1+ 75/2^-8)) data8 0x85ce471968c8893a , 0x00003ffd // log(1/frcpa(1+ 76/2^-8)) data8 0x876e8305bc04066d , 0x00003ffd // log(1/frcpa(1+ 77/2^-8)) data8 0x891012678031fbb3 , 0x00003ffd // log(1/frcpa(1+ 78/2^-8)) data8 0x8a5f1493d766a05f , 0x00003ffd // log(1/frcpa(1+ 79/2^-8)) data8 0x8c030c778c56fa00 , 0x00003ffd // log(1/frcpa(1+ 80/2^-8)) data8 0x8da85df17e31d9ae , 0x00003ffd // log(1/frcpa(1+ 81/2^-8)) data8 0x8efa663e7921687e , 0x00003ffd // log(1/frcpa(1+ 82/2^-8)) data8 0x90a22b6875c6a1f8 , 0x00003ffd // log(1/frcpa(1+ 83/2^-8)) data8 0x91f62cc8f5d24837 , 0x00003ffd // log(1/frcpa(1+ 84/2^-8)) data8 0x93a06cfc3857d980 , 0x00003ffd // log(1/frcpa(1+ 85/2^-8)) data8 0x94f66d5e6fd01ced , 0x00003ffd // log(1/frcpa(1+ 86/2^-8)) data8 0x96a330156e6772f2 , 0x00003ffd // log(1/frcpa(1+ 87/2^-8)) data8 0x97fb3582754ea25b , 0x00003ffd // log(1/frcpa(1+ 88/2^-8)) data8 0x99aa8259aad1bbf2 , 0x00003ffd // log(1/frcpa(1+ 89/2^-8)) data8 0x9b0492f6227ae4a8 , 0x00003ffd // log(1/frcpa(1+ 90/2^-8)) data8 0x9c5f8e199bf3a7a5 , 0x00003ffd // log(1/frcpa(1+ 91/2^-8)) data8 0x9e1293b9998c1daa , 0x00003ffd // log(1/frcpa(1+ 92/2^-8)) data8 0x9f6fa31e0b41f308 , 0x00003ffd // log(1/frcpa(1+ 93/2^-8)) data8 0xa0cda11eaf46390e , 0x00003ffd // log(1/frcpa(1+ 94/2^-8)) data8 0xa22c8f029cfa45aa , 0x00003ffd // log(1/frcpa(1+ 95/2^-8)) data8 0xa3e48badb7856b34 , 0x00003ffd // log(1/frcpa(1+ 96/2^-8)) data8 0xa5459a0aa95849f9 , 0x00003ffd // log(1/frcpa(1+ 97/2^-8)) data8 0xa6a79c84480cfebd , 0x00003ffd // log(1/frcpa(1+ 98/2^-8)) data8 0xa80a946d0fcb3eb2 , 0x00003ffd // log(1/frcpa(1+ 99/2^-8)) data8 0xa96e831a3ea7b314 , 0x00003ffd // log(1/frcpa(1+100/2^-8)) data8 0xaad369e3dc544e3b , 0x00003ffd // log(1/frcpa(1+101/2^-8)) data8 0xac92e9588952c815 , 0x00003ffd // log(1/frcpa(1+102/2^-8)) data8 0xadfa035aa1ed8fdc , 0x00003ffd // log(1/frcpa(1+103/2^-8)) data8 0xaf6219eae1ad6e34 , 0x00003ffd // log(1/frcpa(1+104/2^-8)) data8 0xb0cb2e6d8160f753 , 0x00003ffd // log(1/frcpa(1+105/2^-8)) data8 0xb2354249ad950f72 , 0x00003ffd // log(1/frcpa(1+106/2^-8)) data8 0xb3a056e98ef4a3b4 , 0x00003ffd // log(1/frcpa(1+107/2^-8)) data8 0xb50c6dba52c6292a , 0x00003ffd // log(1/frcpa(1+108/2^-8)) data8 0xb679882c33876165 , 0x00003ffd // log(1/frcpa(1+109/2^-8)) data8 0xb78c07429785cedc , 0x00003ffd // log(1/frcpa(1+110/2^-8)) data8 0xb8faeb8dc4a77d24 , 0x00003ffd // log(1/frcpa(1+111/2^-8)) data8 0xba6ad77eb36ae0d6 , 0x00003ffd // log(1/frcpa(1+112/2^-8)) data8 0xbbdbcc915e9bee50 , 0x00003ffd // log(1/frcpa(1+113/2^-8)) data8 0xbd4dcc44f8cf12ef , 0x00003ffd // log(1/frcpa(1+114/2^-8)) data8 0xbec0d81bf5b531fa , 0x00003ffd // log(1/frcpa(1+115/2^-8)) data8 0xc034f19c139186f4 , 0x00003ffd // log(1/frcpa(1+116/2^-8)) data8 0xc14cb69f7c5e55ab , 0x00003ffd // log(1/frcpa(1+117/2^-8)) data8 0xc2c2abbb6e5fd56f , 0x00003ffd // log(1/frcpa(1+118/2^-8)) data8 0xc439b2c193e6771e , 0x00003ffd // log(1/frcpa(1+119/2^-8)) data8 0xc553acb9d5c67733 , 0x00003ffd // log(1/frcpa(1+120/2^-8)) data8 0xc6cc96e441272441 , 0x00003ffd // log(1/frcpa(1+121/2^-8)) data8 0xc8469753eca88c30 , 0x00003ffd // log(1/frcpa(1+122/2^-8)) data8 0xc962cf3ce072b05c , 0x00003ffd // log(1/frcpa(1+123/2^-8)) data8 0xcadeba8771f694aa , 0x00003ffd // log(1/frcpa(1+124/2^-8)) data8 0xcc5bc08d1f72da94 , 0x00003ffd // log(1/frcpa(1+125/2^-8)) data8 0xcd7a3f99ea035c29 , 0x00003ffd // log(1/frcpa(1+126/2^-8)) data8 0xcef93860c8a53c35 , 0x00003ffd // log(1/frcpa(1+127/2^-8)) data8 0xd0192f68a7ed23df , 0x00003ffd // log(1/frcpa(1+128/2^-8)) data8 0xd19a201127d3c645 , 0x00003ffd // log(1/frcpa(1+129/2^-8)) data8 0xd2bb92f4061c172c , 0x00003ffd // log(1/frcpa(1+130/2^-8)) data8 0xd43e80b2ee8cc8fc , 0x00003ffd // log(1/frcpa(1+131/2^-8)) data8 0xd56173601fc4ade4 , 0x00003ffd // log(1/frcpa(1+132/2^-8)) data8 0xd6e6637efb54086f , 0x00003ffd // log(1/frcpa(1+133/2^-8)) data8 0xd80ad9f58f3c8193 , 0x00003ffd // log(1/frcpa(1+134/2^-8)) data8 0xd991d1d31aca41f8 , 0x00003ffd // log(1/frcpa(1+135/2^-8)) data8 0xdab7d02231484a93 , 0x00003ffd // log(1/frcpa(1+136/2^-8)) data8 0xdc40d532cde49a54 , 0x00003ffd // log(1/frcpa(1+137/2^-8)) data8 0xdd685f79ed8b265e , 0x00003ffd // log(1/frcpa(1+138/2^-8)) data8 0xde9094bbc0e17b1d , 0x00003ffd // log(1/frcpa(1+139/2^-8)) data8 0xe01c91b78440c425 , 0x00003ffd // log(1/frcpa(1+140/2^-8)) data8 0xe14658f26997e729 , 0x00003ffd // log(1/frcpa(1+141/2^-8)) data8 0xe270cdc2391e0d23 , 0x00003ffd // log(1/frcpa(1+142/2^-8)) data8 0xe3ffce3a2aa64922 , 0x00003ffd // log(1/frcpa(1+143/2^-8)) data8 0xe52bdb274ed82887 , 0x00003ffd // log(1/frcpa(1+144/2^-8)) data8 0xe6589852e75d7df6 , 0x00003ffd // log(1/frcpa(1+145/2^-8)) data8 0xe786068c79937a7d , 0x00003ffd // log(1/frcpa(1+146/2^-8)) data8 0xe91903adad100911 , 0x00003ffd // log(1/frcpa(1+147/2^-8)) data8 0xea481236f7d35bb0 , 0x00003ffd // log(1/frcpa(1+148/2^-8)) data8 0xeb77d48c692e6b14 , 0x00003ffd // log(1/frcpa(1+149/2^-8)) data8 0xeca84b83d7297b87 , 0x00003ffd // log(1/frcpa(1+150/2^-8)) data8 0xedd977f4962aa158 , 0x00003ffd // log(1/frcpa(1+151/2^-8)) data8 0xef7179a22f257754 , 0x00003ffd // log(1/frcpa(1+152/2^-8)) data8 0xf0a450d139366ca7 , 0x00003ffd // log(1/frcpa(1+153/2^-8)) data8 0xf1d7e0524ff9ffdb , 0x00003ffd // log(1/frcpa(1+154/2^-8)) data8 0xf30c29036a8b6cae , 0x00003ffd // log(1/frcpa(1+155/2^-8)) data8 0xf4412bc411ea8d92 , 0x00003ffd // log(1/frcpa(1+156/2^-8)) data8 0xf576e97564c8619d , 0x00003ffd // log(1/frcpa(1+157/2^-8)) data8 0xf6ad62fa1b5f172f , 0x00003ffd // log(1/frcpa(1+158/2^-8)) data8 0xf7e499368b55c542 , 0x00003ffd // log(1/frcpa(1+159/2^-8)) data8 0xf91c8d10abaffe22 , 0x00003ffd // log(1/frcpa(1+160/2^-8)) data8 0xfa553f7018c966f3 , 0x00003ffd // log(1/frcpa(1+161/2^-8)) data8 0xfb8eb13e185d802c , 0x00003ffd // log(1/frcpa(1+162/2^-8)) data8 0xfcc8e3659d9bcbed , 0x00003ffd // log(1/frcpa(1+163/2^-8)) data8 0xfe03d6d34d487fd2 , 0x00003ffd // log(1/frcpa(1+164/2^-8)) data8 0xff3f8c7581e9f0ae , 0x00003ffd // log(1/frcpa(1+165/2^-8)) data8 0x803e029e280173ae , 0x00003ffe // log(1/frcpa(1+166/2^-8)) data8 0x80dca10cc52d0757 , 0x00003ffe // log(1/frcpa(1+167/2^-8)) data8 0x817ba200632755a1 , 0x00003ffe // log(1/frcpa(1+168/2^-8)) data8 0x821b05f3b01d6774 , 0x00003ffe // log(1/frcpa(1+169/2^-8)) data8 0x82bacd623ff19d06 , 0x00003ffe // log(1/frcpa(1+170/2^-8)) data8 0x835af8c88e7a8f47 , 0x00003ffe // log(1/frcpa(1+171/2^-8)) data8 0x83c5f8299e2b4091 , 0x00003ffe // log(1/frcpa(1+172/2^-8)) data8 0x8466cb43f3d87300 , 0x00003ffe // log(1/frcpa(1+173/2^-8)) data8 0x850803a67c80ca4b , 0x00003ffe // log(1/frcpa(1+174/2^-8)) data8 0x85a9a1d11a23b461 , 0x00003ffe // log(1/frcpa(1+175/2^-8)) data8 0x864ba644a18e6e05 , 0x00003ffe // log(1/frcpa(1+176/2^-8)) data8 0x86ee1182dcc432f7 , 0x00003ffe // log(1/frcpa(1+177/2^-8)) data8 0x875a925d7e48c316 , 0x00003ffe // log(1/frcpa(1+178/2^-8)) data8 0x87fdaa109d23aef7 , 0x00003ffe // log(1/frcpa(1+179/2^-8)) data8 0x88a129ed4becfaf2 , 0x00003ffe // log(1/frcpa(1+180/2^-8)) data8 0x89451278ecd7f9cf , 0x00003ffe // log(1/frcpa(1+181/2^-8)) data8 0x89b29295f8432617 , 0x00003ffe // log(1/frcpa(1+182/2^-8)) data8 0x8a572ac5a5496882 , 0x00003ffe // log(1/frcpa(1+183/2^-8)) data8 0x8afc2d0ce3b2dadf , 0x00003ffe // log(1/frcpa(1+184/2^-8)) data8 0x8b6a69c608cfd3af , 0x00003ffe // log(1/frcpa(1+185/2^-8)) data8 0x8c101e106e899a83 , 0x00003ffe // log(1/frcpa(1+186/2^-8)) data8 0x8cb63de258f9d626 , 0x00003ffe // log(1/frcpa(1+187/2^-8)) data8 0x8d2539c5bd19e2b1 , 0x00003ffe // log(1/frcpa(1+188/2^-8)) data8 0x8dcc0e064b29e6f1 , 0x00003ffe // log(1/frcpa(1+189/2^-8)) data8 0x8e734f45d88357ae , 0x00003ffe // log(1/frcpa(1+190/2^-8)) data8 0x8ee30cef034a20db , 0x00003ffe // log(1/frcpa(1+191/2^-8)) data8 0x8f8b0515686d1d06 , 0x00003ffe // log(1/frcpa(1+192/2^-8)) data8 0x90336bba039bf32f , 0x00003ffe // log(1/frcpa(1+193/2^-8)) data8 0x90a3edd23d1c9d58 , 0x00003ffe // log(1/frcpa(1+194/2^-8)) data8 0x914d0de2f5d61b32 , 0x00003ffe // log(1/frcpa(1+195/2^-8)) data8 0x91be0c20d28173b5 , 0x00003ffe // log(1/frcpa(1+196/2^-8)) data8 0x9267e737c06cd34a , 0x00003ffe // log(1/frcpa(1+197/2^-8)) data8 0x92d962ae6abb1237 , 0x00003ffe // log(1/frcpa(1+198/2^-8)) data8 0x9383fa6afbe2074c , 0x00003ffe // log(1/frcpa(1+199/2^-8)) data8 0x942f0421651c1c4e , 0x00003ffe // log(1/frcpa(1+200/2^-8)) data8 0x94a14a3845bb985e , 0x00003ffe // log(1/frcpa(1+201/2^-8)) data8 0x954d133857f861e7 , 0x00003ffe // log(1/frcpa(1+202/2^-8)) data8 0x95bfd96468e604c4 , 0x00003ffe // log(1/frcpa(1+203/2^-8)) data8 0x9632d31cafafa858 , 0x00003ffe // log(1/frcpa(1+204/2^-8)) data8 0x96dfaabd86fa1647 , 0x00003ffe // log(1/frcpa(1+205/2^-8)) data8 0x9753261fcbb2a594 , 0x00003ffe // log(1/frcpa(1+206/2^-8)) data8 0x9800c11b426b996d , 0x00003ffe // log(1/frcpa(1+207/2^-8)) data8 0x9874bf4d45ae663c , 0x00003ffe // log(1/frcpa(1+208/2^-8)) data8 0x99231f5ee9a74f79 , 0x00003ffe // log(1/frcpa(1+209/2^-8)) data8 0x9997a18a56bcad28 , 0x00003ffe // log(1/frcpa(1+210/2^-8)) data8 0x9a46c873a3267e79 , 0x00003ffe // log(1/frcpa(1+211/2^-8)) data8 0x9abbcfc621eb6cb6 , 0x00003ffe // log(1/frcpa(1+212/2^-8)) data8 0x9b310cb0d354c990 , 0x00003ffe // log(1/frcpa(1+213/2^-8)) data8 0x9be14cf9e1b3515c , 0x00003ffe // log(1/frcpa(1+214/2^-8)) data8 0x9c5710b8cbb73a43 , 0x00003ffe // log(1/frcpa(1+215/2^-8)) data8 0x9ccd0abd301f399c , 0x00003ffe // log(1/frcpa(1+216/2^-8)) data8 0x9d7e67f3bdce8888 , 0x00003ffe // log(1/frcpa(1+217/2^-8)) data8 0x9df4ea81a99daa01 , 0x00003ffe // log(1/frcpa(1+218/2^-8)) data8 0x9e6ba405a54514ba , 0x00003ffe // log(1/frcpa(1+219/2^-8)) data8 0x9f1e21c8c7bb62b3 , 0x00003ffe // log(1/frcpa(1+220/2^-8)) data8 0x9f956593f6b6355c , 0x00003ffe // log(1/frcpa(1+221/2^-8)) data8 0xa00ce1092e5498c3 , 0x00003ffe // log(1/frcpa(1+222/2^-8)) data8 0xa0c08309c4b912c1 , 0x00003ffe // log(1/frcpa(1+223/2^-8)) data8 0xa1388a8c6faa2afa , 0x00003ffe // log(1/frcpa(1+224/2^-8)) data8 0xa1b0ca7095b5f985 , 0x00003ffe // log(1/frcpa(1+225/2^-8)) data8 0xa22942eb47534a00 , 0x00003ffe // log(1/frcpa(1+226/2^-8)) data8 0xa2de62326449d0a3 , 0x00003ffe // log(1/frcpa(1+227/2^-8)) data8 0xa357690f88bfe345 , 0x00003ffe // log(1/frcpa(1+228/2^-8)) data8 0xa3d0a93f45169a4b , 0x00003ffe // log(1/frcpa(1+229/2^-8)) data8 0xa44a22f7ffe65f30 , 0x00003ffe // log(1/frcpa(1+230/2^-8)) data8 0xa500c5e5b4c1aa36 , 0x00003ffe // log(1/frcpa(1+231/2^-8)) data8 0xa57ad064eb2ebbc2 , 0x00003ffe // log(1/frcpa(1+232/2^-8)) data8 0xa5f5152dedf4384e , 0x00003ffe // log(1/frcpa(1+233/2^-8)) data8 0xa66f9478856233ec , 0x00003ffe // log(1/frcpa(1+234/2^-8)) data8 0xa6ea4e7cca02c32e , 0x00003ffe // log(1/frcpa(1+235/2^-8)) data8 0xa765437325341ccf , 0x00003ffe // log(1/frcpa(1+236/2^-8)) data8 0xa81e21e6c75b4020 , 0x00003ffe // log(1/frcpa(1+237/2^-8)) data8 0xa899ab333fe2b9ca , 0x00003ffe // log(1/frcpa(1+238/2^-8)) data8 0xa9157039c51ebe71 , 0x00003ffe // log(1/frcpa(1+239/2^-8)) data8 0xa991713433c2b999 , 0x00003ffe // log(1/frcpa(1+240/2^-8)) data8 0xaa0dae5cbcc048b3 , 0x00003ffe // log(1/frcpa(1+241/2^-8)) data8 0xaa8a27ede5eb13ad , 0x00003ffe // log(1/frcpa(1+242/2^-8)) data8 0xab06de228a9e3499 , 0x00003ffe // log(1/frcpa(1+243/2^-8)) data8 0xab83d135dc633301 , 0x00003ffe // log(1/frcpa(1+244/2^-8)) data8 0xac3fb076adc7fe7a , 0x00003ffe // log(1/frcpa(1+245/2^-8)) data8 0xacbd3cbbe47988f1 , 0x00003ffe // log(1/frcpa(1+246/2^-8)) data8 0xad3b06b1a5dc57c3 , 0x00003ffe // log(1/frcpa(1+247/2^-8)) data8 0xadb90e94af887717 , 0x00003ffe // log(1/frcpa(1+248/2^-8)) data8 0xae3754a218f7c816 , 0x00003ffe // log(1/frcpa(1+249/2^-8)) data8 0xaeb5d9175437afa2 , 0x00003ffe // log(1/frcpa(1+250/2^-8)) data8 0xaf349c322e9c7cee , 0x00003ffe // log(1/frcpa(1+251/2^-8)) data8 0xafb39e30d1768d1c , 0x00003ffe // log(1/frcpa(1+252/2^-8)) data8 0xb032df51c2c93116 , 0x00003ffe // log(1/frcpa(1+253/2^-8)) data8 0xb0b25fd3e6035ad9 , 0x00003ffe // log(1/frcpa(1+254/2^-8)) data8 0xb1321ff67cba178c , 0x00003ffe // log(1/frcpa(1+255/2^-8)) ASM_SIZE_DIRECTIVE(log_table_2) .align 32 .global log# .global log10# // log10 has p7 true, p8 false // log has p8 true, p7 false .section .text .proc log10# .align 32 log10: #ifdef _LIBC .global __ieee754_log10 .type __ieee754_log10,@function __ieee754_log10: #endif { .mfi alloc r32=ar.pfs,1,15,4,0 frcpa.s1 log_C,p9 = f1,f8 cmp.eq.unc p7,p8 = r0, r0 } { .mfb addl log_AD_1 = @ltoff(log_table_1), gp fnorm.s1 log_NORM_f8 = f8 br.sptk L(LOG_LOG10_X) } ;; .endp log10 ASM_SIZE_DIRECTIVE(log10) ASM_SIZE_DIRECTIVE(__ieee754_log10) .section .text .proc log# .align 32 log: #ifdef _LIBC .global __ieee754_log .type __ieee754_log,@function __ieee754_log: #endif { .mfi alloc r32=ar.pfs,1,15,4,0 frcpa.s1 log_C,p9 = f1,f8 cmp.eq.unc p8,p7 = r0, r0 } { .mfi addl log_AD_1 = @ltoff(log_table_1), gp fnorm.s1 log_NORM_f8 = f8 nop.i 999 } ;; L(LOG_LOG10_X): { .mfi ld8 log_AD_1 = [log_AD_1] fclass.m.unc p15,p0 = f8, 0x0b // Test for x=unorm mov log_GR_fff9 = 0xfff9 } { .mfi mov log_GR_half_exp = 0x0fffe fms.s1 log_w = f8,f1,f1 mov log_GR_exp_17_ones = 0x1ffff } ;; { .mmi getf.exp log_GR_signexp_f8 = f8 // If x unorm then must recompute setf.exp log_half = log_GR_half_exp // Form 0.5 = -Q1 nop.i 999 } ;; { .mmb adds log_AD_2 = 0x30, log_AD_1 mov log_GR_exp_16_ones = 0xffff (p15) br.cond.spnt L(LOG_DENORM) } ;; L(LOG_COMMON): {.mfi ldfpd log_P5,log_P4 = [log_AD_1],16 fclass.m.unc p6,p0 = f8, 0xc3 // Test for x=nan and log_GR_exp_f8 = log_GR_signexp_f8, log_GR_exp_17_ones } {.mfi ldfpd log_P3,log_P2 = [log_AD_2],16 nop.f 999 nop.i 999 } ;; { .mfi ldfpd log_Q8,log_Q7 = [log_AD_1],16 fclass.m.unc p11,p0 = f8, 0x21 // Test for x=+inf sub log_GR_true_exp_f8 = log_GR_exp_f8, log_GR_exp_16_ones } { .mfi ldfpd log_Q6,log_Q5 = [log_AD_2],16 nop.f 999 nop.i 999 } ;; { .mfi ldfpd log_Q4,log_Q3 = [log_AD_1],16 fma.s1 log_wsq = log_w, log_w, f0 nop.i 999 } { .mfb ldfpd log_Q2,log_Q1 = [log_AD_2],16 (p6) fma.d.s0 f8 = f8,f1,f0 // quietize nan result if x=nan (p6) br.ret.spnt b0 // Exit for x=nan } ;; { .mfi setf.sig log_int_Nfloat = log_GR_true_exp_f8 fcmp.eq.s1 p10,p0 = log_NORM_f8, f1 // Test for x=+1.0 nop.i 999 } { .mfb nop.m 999 fms.s1 log_r = log_C,f8,f1 (p11) br.ret.spnt b0 // Exit for x=+inf } ;; { .mmf getf.sig log_GR_significand_f8 = log_NORM_f8 ldfe log_inv_ln10 = [log_AD_2],16 fclass.m.unc p6,p0 = f8, 0x07 // Test for x=0 } ;; { .mfb nop.m 999 (p10) fmerge.s f8 = f0, f0 (p10) br.ret.spnt b0 // Exit for x=1.0 ;; } { .mfi getf.exp log_GR_signexp_w = log_w fclass.m.unc p12,p0 = f8, 0x3a // Test for x neg norm, unorm, inf shl log_GR_index = log_GR_significand_f8,1 } ;; { .mfi ldfe log_log2 = [log_AD_2],16 fnma.s1 log_rp_q10 = log_half, log_wsq, log_w shr.u log_GR_index = log_GR_index,56 } { .mfb nop.m 999 fma.s1 log_w3 = log_wsq, log_w, f0 (p6) br.cond.spnt L(LOG_ZERO_NEG) // Branch if x=0 ;; } { .mfi and log_GR_exp_w = log_GR_exp_17_ones, log_GR_signexp_w fma.s1 log_w4 = log_wsq, log_wsq, f0 nop.i 999 } { .mfb shladd log_AD_2 = log_GR_index,4,log_AD_2 fma.s1 log_rsq = log_r, log_r, f0 (p12) br.cond.spnt L(LOG_ZERO_NEG) // Branch if x<0 ;; } { .mfi ldfe log_T = [log_AD_2] fma.s1 log_rp_p4 = log_P5, log_r, log_P4 nop.i 999 } { .mfi nop.m 999 fma.s1 log_rp_p32 = log_P3, log_r, log_P2 nop.i 999 ;; } { .mfi nop.m 999 fma.s1 log_rp_q7 = log_Q8, log_w, log_Q7 nop.i 999 } { .mfi nop.m 999 fma.s1 log_rp_q65 = log_Q6, log_w, log_Q5 nop.i 999 ;; } // p13 <== large w log // p14 <== small w log { .mfi (p8) cmp.ge.unc p13,p14 = log_GR_exp_w, log_GR_fff9 fma.s1 log_rp_q3 = log_Q4, log_w, log_Q3 nop.i 999 ;; } // p10 <== large w log10 // p11 <== small w log10 { .mfi (p7) cmp.ge.unc p10,p11 = log_GR_exp_w, log_GR_fff9 fcvt.xf log_Nfloat = log_int_Nfloat nop.i 999 } { .mfi nop.m 999 fma.s1 log_rp_q21 = log_Q2, log_w3, log_rp_q10 nop.i 999 ;; } { .mfi nop.m 999 fma.s1 log_rcube = log_rsq, log_r, f0 nop.i 999 } { .mfi nop.m 999 fma.s1 log_rp_p10 = log_rsq, log_P1, log_r nop.i 999 ;; } { .mfi nop.m 999 fcmp.eq.s0 p6,p0 = f8,f0 // Sets flag on +denormal input nop.i 999 } { .mfi nop.m 999 fma.s1 log_rp_p2 = log_rp_p4, log_rsq, log_rp_p32 nop.i 999 ;; } { .mfi nop.m 999 fma.s1 log_w6 = log_w3, log_w3, f0 nop.i 999 } { .mfi nop.m 999 fma.s1 log_Qlo = log_rp_q7, log_wsq, log_rp_q65 nop.i 999 } ;; { .mfi nop.m 999 fma.s1 log_Qhi = log_rp_q3, log_w4, log_rp_q21 nop.i 999 ;; } { .mfi nop.m 999 fma.s1 log_T_plus_Nlog2 = log_Nfloat,log_log2, log_T nop.i 999 ;; } { .mfi nop.m 999 fma.s1 log_r2P_r = log_rp_p2, log_rcube, log_rp_p10 nop.i 999 ;; } // small w, log <== p14 { .mfi nop.m 999 (p14) fma.d f8 = log_Qlo, log_w6, log_Qhi nop.i 999 } { .mfi nop.m 999 fma.s1 log_Q = log_Qlo, log_w6, log_Qhi nop.i 999 ;; } { .mfi nop.m 999 (p10) fma.s1 log_log10_hi = log_T_plus_Nlog2, log_inv_ln10,f0 nop.i 999 ;; } // large w, log <== p13 .pred.rel "mutex",p13,p10 { .mfi nop.m 999 (p13) fadd.d f8 = log_T_plus_Nlog2, log_r2P_r nop.i 999 } { .mfi nop.m 999 (p10) fma.s1 log_log10_lo = log_inv_ln10, log_r2P_r,f0 nop.i 999 ;; } // small w, log10 <== p11 { .mfi nop.m 999 (p11) fma.d f8 = log_inv_ln10,log_Q,f0 nop.i 999 ;; } // large w, log10 <== p10 { .mfb nop.m 999 (p10) fma.d f8 = log_log10_hi, f1, log_log10_lo br.ret.sptk b0 ;; } L(LOG_DENORM): { .mfb getf.exp log_GR_signexp_f8 = log_NORM_f8 nop.f 999 br.cond.sptk L(LOG_COMMON) } ;; L(LOG_ZERO_NEG): // qnan snan inf norm unorm 0 -+ // 0 0 0 0 0 1 11 0x7 // 0 0 1 1 1 0 10 0x3a // Save x (f8) in f10 { .mfi nop.m 999 fmerge.s f10 = f8,f8 nop.i 999 ;; } // p8 p9 means ln(+-0) = -inf // p7 p10 means log(+-0) = -inf // p13 means ln(-) // p14 means log(-) { .mfi nop.m 999 fmerge.ns f6 = f1,f1 // Form -1.0 nop.i 999 ;; } // p9 means ln(+-0) = -inf // p10 means log(+-0) = -inf // Log(+-0) = -inf { .mfi nop.m 999 (p8) fclass.m.unc p9,p0 = f10, 0x07 nop.i 999 } { .mfi nop.m 999 (p7) fclass.m.unc p10,p0 = f10, 0x07 nop.i 999 ;; } // p13 ln(-) // p14 log(-) // Log(-inf, -normal, -unnormal) = QNAN indefinite { .mfi nop.m 999 (p8) fclass.m.unc p13,p0 = f10, 0x3a nop.i 999 } { .mfi nop.m 999 (p7) fclass.m.unc p14,p0 = f10, 0x3a nop.i 999 ;; } .pred.rel "mutex",p9,p10 { .mfi (p9) mov log_GR_tag = 2 (p9) frcpa f8,p11 = f6,f0 nop.i 999 } { .mfi (p10) mov log_GR_tag = 8 (p10) frcpa f8,p12 = f6,f0 nop.i 999 ;; } .pred.rel "mutex",p13,p14 { .mfi (p13) mov log_GR_tag = 3 (p13) frcpa f8,p11 = f0,f0 nop.i 999 } { .mfb (p14) mov log_GR_tag = 9 (p14) frcpa f8,p12 = f0,f0 br.cond.sptk __libm_error_region ;; } .endp log ASM_SIZE_DIRECTIVE(log) ASM_SIZE_DIRECTIVE(__ieee754_log) // 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 .proc __libm_error_region __libm_error_region: .prologue // (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] = f1,16 // 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] = f10 // 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 };; .endp __libm_error_region ASM_SIZE_DIRECTIVE(__libm_error_region) .type __libm_error_support#,@function .global __libm_error_support#