diff options
Diffstat (limited to 'sysdeps/ia64/fpu/s_cbrtf.S')
| -rw-r--r-- | sysdeps/ia64/fpu/s_cbrtf.S | 655 |
1 files changed, 655 insertions, 0 deletions
diff --git a/sysdeps/ia64/fpu/s_cbrtf.S b/sysdeps/ia64/fpu/s_cbrtf.S new file mode 100644 index 0000000000..620bbb50de --- /dev/null +++ b/sysdeps/ia64/fpu/s_cbrtf.S @@ -0,0 +1,655 @@ +.file "cbrtf.asm" + +// Copyright (c) 2000, 2001, Intel Corporation +// All rights reserved. +// +// Contributed 2/2/2000 by John Harrison, Cristina Iordache, Ted Kubaska, +// Bob Norin, Shane Story, and Ping Tak Peter Tang +// of the Computational Software Lab, Intel Corporation. +// +// WARRANTY DISCLAIMER +// +// 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 +// 5/18/00: New version (modified algorithm) +// +// API +//============================================================== +// float cbrtf(float) +// +// Overview of operation +//============================================================== +// Background +// +// Implementation +// +// cbrt(a) = cbrt(a y) / cbrt(y) +// = cbrt(1 - (1 - a y)) * 1/cbrt(y) +// +// where y = frcpa(a). +// +// * cbrt(1 - (1 - a y)) is approximated by a degree-2 polynomial +// +// 1 - (1/3)*r - (1/9)*r^2 +// +// in r = 1 - a y. +// +// * The values 1/cbrt(y) are stored in a table of constants T0 +// to 64 bits of accuracy +// +// The table values are stored for three exponent values and are +// then multiplied by e/3 where e is the exponent of the input number. +// This computation is carried out in parallel with the polynomial +// evaluation: +// +// T = 2^(e/3) * T0 + + + + + +//=============== +// input = x +// C = frcpa(x) +// r = 1 - C * x +// +// Special values +//============================================================== + + + +// Registers used +//============================================================== +// f6-f15 +// r2, r23-r26, r28-r30 +// p6,p7,p8,p12 + +#include "libm_support.h" + +// Data tables +//============================================================== + +#ifdef _LIBC +.rodata +#else +.data +#endif + +.align 16 + +poly_coeffs: +ASM_TYPE_DIRECTIVE(poly_coeffs,@object) +data8 0xaaaaaaaaaaaaaaab, 0x00003ffd // 1/3 +data8 0xe38e38e38e38e38e, 0x00003ffb // 1/9 +ASM_SIZE_DIRECTIVE(poly_coeffs) + + +T_table: +ASM_TYPE_DIRECTIVE(T_table,@object) + +data8 0x80155c748c374836, 0xa160019ed37fb4ae +data8 0xcb51ddcb9e93095e, 0x8040404b0879f7f9 +data8 0xa1960b5966da4608, 0xcb95f333968ad59b +data8 0x806b5dce4b405c10, 0xa1cc5dbe6dc2aab4 +data8 0xcbda64292d3ffd97, 0x8096b586974669b1 +data8 0xa202f97995b69c0d, 0xcc1f3184af961596 +data8 0x80bcd273d952a028, 0xa232fe6eb0c0577d +data8 0xcc5bb1ac954d33e2, 0x80e898c52813f2f3 +data8 0xa26a2582012f6e17, 0xcca12e9831fc6402 +data8 0x81149add67c2d208, 0xa2a197e5d10465cb +data8 0xcce70a67b64f24ad, 0x813b4e2c856b6e9a +data8 0xa2d25a532efefbc8, 0xcd24794726477ea5 +data8 0x8167c1dde03de7aa, 0xa30a5bd6e49e4ab8 +data8 0xcd6b096a0b70ee87, 0x818ed973b811135e +data8 0xa33b9c9b59879e24, 0xcda9177738b15a90 +data8 0x81bbc0c33e13ec98, 0xa3742fca6a3c1f21 +data8 0xcdf05f2247dffab9, 0x81e33e69fbe7504a +data8 0xa3a5f1273887bf22, 0xce2f0f347f96f906 +data8 0x820aec524e3c23e9, 0xa3d7ef508ff11574 +data8 0xce6e0be0cd551a61, 0x823880f78e70b805 +data8 0xa4115ce30548bc15, 0xceb666b2c347d1de +data8 0x826097a62a8e5200, 0xa443df0e53df577a +data8 0xcef609b0cb874f00, 0x8288dfe00e9b5eaf +data8 0xa4769fa5913c0ec3, 0xcf35fb5447e5c765 +data8 0x82b15a10c5371624, 0xa4a99f303bc7def5 +data8 0xcf763c47ee869f00, 0x82da06a527b18937 +data8 0xa4dcde37779adf4b, 0xcfb6cd3888d71785 +data8 0x8302e60b635ab394, 0xa5105d46152c938a +data8 0xcff7aed4fbfbb447, 0x832bf8b2feec2f0e +data8 0xa5441ce89825cb8d, 0xd038e1ce5167e3c6 +data8 0x83553f0ce00e276b, 0xa5781dad3e54d899 +data8 0xd07a66d7bfa0ebba, 0x837eb98b50f8322a +data8 0xa5ac602406c4e68c, 0xd0bc3ea6b32d1b21 +data8 0x83a270f44c84f699, 0xa5d9601d95c2c0bc +data8 0xd0f4f0e8f36c1bf8, 0x83cc4d7cfcfac5ca +data8 0xa60e1e1a2de14745, 0xd1376458e34b037e +data8 0x83f65f78a8872b4c, 0xa6431f6e3fbd9658 +data8 0xd17a2ca133f78572, 0x8420a75f2f7b53c8 +data8 0xa67864b0d432fda4, 0xd1bd4a80301c5715 +data8 0x844510461ff14209, 0xa6a6444aa0243c0b +data8 0xd1f71682b2fa4575, 0x846fbd91b930bed2 +data8 0xa6dc094d10f25792, 0xd23ad555f773f059 +data8 0x84947e18234f3294, 0xa70a574cc02bba69 +data8 0xd2752c7039a5bf73, 0x84bf92755825045a +data8 0xa7409e2af9549084, 0xd2b98ee008c06b59 +data8 0x84e4ac0ee112ba51, 0xa76f5c64ca2cf13b +data8 0xd2f4735ffd700280, 0x8509ef44b86f20be +data8 0xa79e4f0babab5dc0, 0xd32f99ed6d9ac0e1 +data8 0x85359d5d91768427, 0xa7d5579ae5164b85 +data8 0xd374f0666c75d51c, 0x855b3bd5b7384357 +data8 0xa804bd3c6fe61cc8, 0xd3b0a7d13618e4a1 +data8 0x858104f0c415f79a, 0xa8345895e5250a5a +data8 0xd3eca2ea53bcec0c, 0x85a6f90390d29864 +data8 0xa8642a122b44ef0b, 0xd428e23874f13a17 +data8 0x85d3772fcd56a1dd, 0xa89c38ca18f6108b +data8 0xd46f82fe293bc6d3, 0x85f9c982fcc002f3 +data8 0xa8cc81063b6e87ca, 0xd4ac57e9b7186420 +data8 0x862047e0e7ea554b, 0xa8fd00bfa409285e +data8 0xd4e972becb04e8b8, 0x8646f2a26f7f5852 +data8 0xa92db8664d5516da, 0xd526d40a7a9b43a3 +data8 0x866dca21754096b5, 0xa95ea86b75cc2c20 +data8 0xd5647c5b73917370, 0x8694ceb8dfd17a37 +data8 0xa98fd141a4992deb, 0xd5a26c4201bd6d13 +data8 0x86bc00c49e9307e8, 0xa9c1335cae7446ba +data8 0xd5e0a45015350a7e, 0x86dccd74fce79610 +data8 0xa9ea8686f556f645, 0xd614b539c6194104 +data8 0x870453c845acf90f, 0xaa1c52d17906bb19 +data8 0xd6537310e224283f, 0x872c089a1e90342c +data8 0xaa4e59b046dab887, 0xd6927ab62244c917 +data8 0x8753ec4a92d16c5e, 0xaa809b9c60d1890b +data8 0xd6d1ccc1fc4ef4b7, 0x877bff3aca19f6b4 +data8 0xaab319102f3f9b33, 0xd71169cea98fdded +data8 0x879d88b6fe1c324c, 0xaadd5a18c1e21274 +data8 0xd746a66a5bc9f6d9, 0x87c5f346dbf98c3a +data8 0xab1045f2ac31bdf5, 0xd786ce8f0fae5317 +data8 0x87e7c653efacef2c, 0xab3ae3ab2df7231e +data8 0xd7bc7ff214c4e75a, 0x881089d4e73ffefc +data8 0xab6e3f945d1e96fc, 0xd7fd35467a517ed1 +data8 0x88397e6a366f2a8a, 0xaba1d953a08fa94e +data8 0xd83e38838648d815, 0x885bc559e5e1c081 +data8 0xabcd090db7ef4c3f, 0xd874a1db598b8951 +data8 0x887e2ee392bb7a93, 0xabf864602d7c323d +data8 0xd8ab42205b80edaf, 0x88a7a8587e404257 +data8 0xac2ca5886ccf9b57, 0xd8ed1849d202f965 +data8 0x88ca5eda67594784, 0xac5861d4aa441f0f +data8 0xd92432bd5a173685, 0x88f4356166bd590e +data8 0xac8d183fe3a2fbed, 0xd9669ca45b03c23e +data8 0x89173a0acf5ce026, 0xacb93703ff51571e +data8 0xd99e3327cf89574e, 0x893a62a098b6a57b +data8 0xace5830ad0c3f14b, 0xd9d602b19b100466 +data8 0x895daf637236ae2c, 0xad11fca5d78b3ff2 +data8 0xda0e0ba86c096841, 0x89883b9d1c2fa9c5 +data8 0xad4797fddf91a798, 0xda5195fcdb1c3dce +data8 0x89abd8dd374a5d7b, 0xad747701e559ebcb +data8 0xda8a1eb87a491f6c, 0x89cf9b1dcd197fa0 +data8 0xada184a47e9c7613, 0xdac2e230b91c3f84 +data8 0x89f382a258ea79de, 0xadcec13ab0dda8ff +data8 0xdafbe0d0b66aea30, 0x8a178faf06648f29 +data8 0xadfc2d1a5fd21ba8, 0xdb351b04a8fafced +data8 0x8a3bc288b3e1d18a, 0xae29c89a5053c33a +data8 0xdb6e9139e33cdd8e, 0x8a601b74f4d1f835 +data8 0xae5794122b638df9, 0xdba843ded7151ea1 +data8 0x8a849aba14274764, 0xae858fda8137ae0a +data8 0xdbe2336319b61fc8, 0x8aa9409f16cdbc9b +data8 0xaeb3bc4ccc56d3d1, 0xdc1c60376789fa68 +data8 0x8ace0d6bbe2cb316, 0xaee219c374c09920 +data8 0xdc56cacda82d0cd5, 0x8af301688ab33558 +data8 0xaf10a899d3235fe7, 0xdc917398f2797814 +data8 0x8b181cdebe6f3206, 0xaf3f692c341fe8b4 +data8 0xdccc5b0d90a3e628, 0x8b3d60185fafcb7c +data8 0xaf6e5bd7db9ae6c2, 0xdd0781a10469f0f2 +data8 0x8b62cb603bb2fad0, 0xaf9d80fb081cd91b +data8 0xdd42e7ca0b52838f, 0x8b80d7d6bc4104de +data8 0xafc35ce063eb3787, 0xdd729ad01c69114d +data8 0x8ba68bf73ac74f39, 0xaff2ddcb5f28f03d +data8 0xddae749c001fbf5e, 0x8bcc68fb9f9f7335 +data8 0xb022923b148e05c5, 0xddea8f50a51c69b1 +data8 0x8bf26f31c534fca2, 0xb0527a919adbf58b +data8 0xde26eb69a0f0f111, 0x8c10f86e13a1a1f9 +data8 0xb078f3ab1d701c65, 0xde576480262399bc +data8 0x8c3749916cc6abb5, 0xb0a93a6870649f31 +data8 0xde943789645933c8, 0x8c5dc4c4f7706032 +data8 0xb0d9b624d62ec856, 0xded14d58139a28af +data8 0x8c7cac3a8c42e3e0, 0xb100a5f53fb3c8e1 +data8 0xdf025c00bbf2b5c7, 0x8ca373f1b7bf2716 +data8 0xb131821882f5540a, 0xdf3feb44d723a713 +data8 0x8cc29907fb951294, 0xb158bf8e4cb04055 +data8 0xdf715bc16c159be0, 0x8ce9ae4e9492aac8 +data8 0xb189fd69d56b238f, 0xdfaf66240e29cda8 +data8 0x8d0911dddbfdad0e, 0xb1b189958e8108e4 +data8 0xdfe139cbf6e19bdc, 0x8d3075c4f20f04ee +data8 0xb1e32a8165b09832, 0xe01fc0fe94d9fc52 +data8 0x8d5018a9d4de77d5, 0xb20b0678fc271eec +data8 0xe051f92ffcc0bd60, 0x8d77cc47dd143515 +data8 0xb23d0bd3f7592b6e, 0xe090feec9c9a06ac +data8 0x8d97af6352739cb7, 0xb26538b2db8420dc +data8 0xe0c39d0c9ff862d6, 0x8db7af523167800f +data8 0xb28d89e339ceca14, 0xe0f668eeb99f188d +data8 0x8ddfd80bc68c32ff, 0xb2c022ca12e55a16 +data8 0xe1362890eb663139, 0x8e00197e1e7c88fe +data8 0xb2e8c6852c6b03f1, 0xe1695c7212aecbaa +data8 0x8e207859f77e20e7, 0xb3118f4eda9fe40f +data8 0xe19cbf0391bbbbe9, 0x8e40f4ce60c9f8e2 +data8 0xb33a7d6268109ebe, 0xe1d050901c531e85 +data8 0x8e69ba46cf2fde4d, 0xb36ddbc5ea70ec55 +data8 0xe2110903b4f4047a, 0x8e8a7a00bd7ae63e +data8 0xb3971e9b39264023, 0xe2450559b4d80b6d +data8 0x8eab57ef1cf2f529, 0xb3c0877ecc18e24a +data8 0xe27931a231554ef3, 0x8ecc5442cffb1dad +data8 0xb3ea16ae3a6c905f, 0xe2ad8e2ac3c5b04b +data8 0x8eed6f2d2a4acbfe, 0xb413cc67aa0e4d2d +data8 0xe2e21b41b9694cce, 0x8f0ea8dff24441ff +data8 0xb43da8e9d163e1af, 0xe316d93615862714 +data8 0x8f385c95d696b817, 0xb47233773b84d425 +data8 0xe3590bd86a0d30f9, 0x8f59dc43edd930f3 +data8 0xb49c6825430fe730, 0xe38e38e38e38e38e +data8 0x8f7b7b5f5ffad1c4, 0xb4c6c46bcdb27dcf +data8 0xe3c397d1e6db7839, 0x8f9d3a1bea165f38 +data8 0xb4f1488c0b35d26f, 0xe3f928f5953feb9e +data8 0x8fbf18adc34b66da, 0xb51bf4c7c51f0168 +data8 0xe42eeca17c62886c, 0x8fe117499e356095 +data8 0xb546c9616087ab9c, 0xe464e32943446305 +data8 0x90033624aa685f8d, 0xb571c69bdffd9a70 +data8 0xe49b0ce15747a8a2, 0x9025757495f36b86 +data8 0xb59cecbae56984c3, 0xe4d16a1eee94e9d4 +data8 0x903f3a5dcc091203, 0xb5bd64512bb14bb7 +data8 0xe4fa52107353f67d, 0x9061b2fceb2bdbab +data8 0xb5e8d2a4bf5ba416, 0xe5310a471f4d2dc3 +data8 0x90844ca7211032a7, 0xb6146a9a1bc47819 +data8 0xe567f6f1c2b9c224, 0x90a7079403e6a15d +data8 0xb6402c7749d621c0, 0xe59f18689a9e4c9a +data8 0x90c9e3fbafd63799, 0xb66c1882fb435ea2 +data8 0xe5d66f04b8a68ecf, 0x90ece216c8a16ee4 +data8 0xb6982f048c999a56, 0xe60dfb2005c192e9 +data8 0x9110021e7b516f0a, 0xb6c47044075b4142 +data8 0xe645bd1544c7ea51, 0x912a708a39be9075 +data8 0xb6e5bd6bfd02bafd, 0xe66fb21b505b20a0 +data8 0x914dcc7b31146370, 0xb7124a2736ff8ef2 +data8 0xe6a7d32af4a7c59a, 0x91714af8cfe984d5 +data8 0xb73f026a01e94177, 0xe6e02b129c6a5ae4 +data8 0x918c00a6f3795e97, 0xb760a959f1d0a7a7 +data8 0xe70a9136a7403039, 0x91afbc299ed0295d +data8 0xb78dae7e06868ab0, 0xe74349fb2d92a589 +data8 0x91d39add3e958db0, 0xb7badff8ad9e4e02 +data8 0xe77c3a9c86ed7d42, 0x91ee9920a8974d92 +data8 0xb7dce25b8e17ae9f, 0xe7a713f88151518a +data8 0x9212b5fcac537c19, 0xb80a6226904045e2 +data8 0xe7e067453317ed2b, 0x9236f6b256923fcf +data8 0xb8380f1cafd73c1c, 0xe819f37a81871bb5 +data8 0x92523ee6f90dcfc3, 0xb85a6ea8e321b4d8 +data8 0xe8454236bfaeca14, 0x9276bef031e6eb79 +data8 0xb8886b684ae7d2fa, 0xe87f32f24c3fc90e +data8 0x929236ec237a24ad, 0xb8ab0726fa00cf5d +data8 0xe8aacd8688892ba6, 0x92b6f70b7efe9dc3 +data8 0xb8d954a4d13b7cb1, 0xe8e523fd32f606f7 +data8 0x92d29f61eec7dc2b, 0xb8fc2d4f6cd9f04a +data8 0xe9110b5311407927, 0x92f7a05d5b8ba92f +data8 0xb92acc851476b1ab, 0xe94bc8bf0c108fa3 +data8 0x931379a403be5c16, 0xb94de2d841a184c2 +data8 0xe977fdc439c2ca3c, 0x9338bc44de2e3f34 +data8 0xb97cd4c36c92693c, 0xe9b3236528fc349e +data8 0x9354c71412c69486, 0xb9a0297f172665e3 +data8 0xe9dfa70b745ac1b4, 0x937a4c273907e262 +data8 0xb9cf6f21e36c3924, 0xea1b36268d0eaa38 +data8 0x93968919f6e7975d, 0xb9f3030951267208 +data8 0xea480963fd394197, 0x93bc516fdd4680c9 +data8 0xba229d6a618e7c59, 0xea84034425f27484 +data8 0x93d8c123d9be59b2, 0xba467144459f9855 +data8 0xeab12713138dd1cc, 0x93f546c955e60076 +data8 0xba6a60c3c48f1a4b, 0xeade6db73a5e503b +data8 0x941b70a65879079f, 0xba9a76056b67ee7a +data8 0xeb1b0268343b121b, 0x943829f337410591 +data8 0xbabea699563ada6e, 0xeb489b0b2bdb5f14 +data8 0x9454f995765bc4d2, 0xbae2f350b262cc4b +data8 0xeb765721e85f03d0, 0x947b86b57f5842ed +data8 0xbb1385a23be24e57, 0xebb389645f222f62 +data8 0x94988aeb23470f86, 0xbb3814975e17c680 +data8 0xebe198f090607e0c, 0x94b5a5dc9695f42a +data8 0xbb5cc031009bf467, 0xec0fcc9321024509 +data8 0x94d2d7a9170d8b42, 0xbb81889680024764 +data8 0xec3e247da8b82f61, 0x94f9e87dd78bf019 +data8 0xbbb2c0d8703ae95d, 0xec7c27d21321c9f7 +data8 0x95175019a503d89e, 0xbbd7cd09ba3c5463 +data8 0xecaad5278824e453, 0x9534cefa625fcb3a +data8 0xbbfcf68c4977718f, 0xecd9a76d097d4e77 +data8 0x955265405c491a25, 0xbc223d88cfc88eee +data8 0xed089ed5dcd99446, 0x9570130c1f9bb857 +data8 0xbc47a2284fee4ff8, 0xed37bb95add09a1c +data8 0x9597ca4119525184, 0xbc79ac0916ed7b8a +data8 0xed76c70508f904b6, 0x95b5af6fb5aa4d3c +data8 0xbc9f5670d1a13030, 0xeda63bb05e7f93c6 +data8 0x95d3ac9273aafd7a, 0xbcc51f068cb95c1d +data8 0xedd5d661daed2dc4, 0x95f1c1cafdfd3684 +data8 0xbceb05f4b30a9bc0, 0xee05974eef86b903 +data8 0x960fef3b430b8d5f, 0xbd110b6604c7d306 +data8 0xee357ead791fc670, 0x962e350575b409c5 +data8 0xbd372f8598620f19, 0xee658cb3c134a463 +data8 0x964c934c0dfc1708, 0xbd5d727edb6b3c7e +data8 0xee95c1987f080211, 0x966b0a31c9c6bc7d +data8 0xbd83d47d937bbc6d, 0xeec61d92d8c4314f +data8 0x968999d9ad8d264e, 0xbdaa55addf1ae47d +data8 0xeef6a0da64a014ac, 0x96a8426705198795 +data8 0xbdd0f63c36aa73f0, 0xef274ba72a07c811 +data8 0x96c703fd64445ee5, 0xbdf7b6556d550a15 +data8 0xef581e31a2c91260, 0x96e5dec0a7b4268d +data8 0xbe1e9626b1ffa96b, 0xef8918b2bc43aec6 +data8 0x9704d2d4f59f79f3, 0xbe4595dd903e5371 +data8 0xefba3b63d89d7cbf, 0x9723e05ebe91b9b0 +data8 0xbe6cb5a7f14bc935, 0xefeb867ecffaa607 +data8 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0xa0e77200215909e6, 0xcab9f8122c99a101 +data8 0xff6b57f7c33e4e9a, 0xa1021d760d584855 +data8 0xcadb9221e268c3b5, 0xff95ade2d1bd7358 +data8 0xa11cdaa36068a57d, 0xcafd4283d8043dfd +data8 0xffc01fed60f86fb5, 0xa137a99cbd3f880b +data8 0xcb1f09520d37c6fb, 0xffeaae3832b63956 +ASM_SIZE_DIRECTIVE(T_table) + + + + + + +.align 32 +.global cbrtf# + +.section .text +.proc cbrtf# +.align 32 +cbrtf: + + +{ .mfi + getf.sig r28=f8 + // will continue only for normal/denormal numbers +(p0) fclass.nm.unc p12,p7 = f8, 0x1b + // r2 = pointer to C_1,C_2 followed by T_table + addl r2 = @ltoff(poly_coeffs), gp +} +{.mfi + // r29=bias-((2^8-1)/3) -63=0xffff-0x55-0x3f=0xff6b + mov r29=0xff6b + // normalize a + fma.s1 f14=f8,f1,f0 + nop.i 0;; +} +{.mib + nop.m 0 + (p7) cmp.eq p12,p0=r28,r0 + nop.b 0;; +} +{.mfb + // load start address for C_1,C_2 followed by T_table + ld8 r2=[r2] + (p12) fma.s.s0 f8=f8,f1,f0 + (p12) br.ret.spnt b0;; +} +{.mmf + // load C_1 + ldfe f7=[r2],16 + nop.m 0 + // y=frcpa(a) + frcpa.s0 f8,p6=f1,f8;; +} +{.mmi + // load C_2 + ldfe f9=[r2],16 + // r28=bias-(2^8-1) + mov r28=0xff00 + nop.i 0;; +} +{.mmi + // get normalized significand + getf.sig r23=f14 + // get exponent + getf.exp r24=f14 + mov r25=0x20000;; +} +{.mii + // get r26=sign + and r26=r24,r25 + // eliminate leading 1 from r23=1st table index + shl r23=r23,1 + // eliminate sign from exponent (r25) + andcm r25=r24,r25;; +} +{.mfi + // subtract bias from r25=exponent + sub r25=r25,r28 + // r=1-a*y + (p6) fnma.s1 f6=f8,f14,f1 + // r23=1st table index (y_index8 bits) + shr.u r23=r23,56;; +} +{.mii + // 1: exponent*=5; // (2^{16}-1)/3=0x5555 + shladd r24=r25,2,r25 + // r23=3*y_index + shladd r23=r23,1,r23;; + // r30=(5*expon)*16+5*expon=(0x55)*expon + shladd r30=r24,4,r24;; +} +{.mmi + // adjust T_table pointer by 1st index + shladd r2=r23,3,r2;; + // f10=T[0][y] + (p6) ldf8 f10=[r2],8 + // r24=(0x5500)*expon + shl r24=r30,8;; +} +{.mfi + // f11=T[1][y] + (p6) ldf8 f11=[r2],8 + // P_1=C_1+C_2*r + (p6) fma.s1 f7=f9,f6,f7 + // r24=(0x5555)*expon + add r24=r24,r30;; +} +{.mmi + // r24=(0x5556)*expon // 0x5556=(2^{16}+2)/3 + add r24=r24,r25;; + // f8=T[2][y] + (p6) ldf8 f8=[r2] + // r24=floor(expon/3) + shr r24=r24,16;; +} +{.mmi + nop.m 0 + // r28=3*exponent + shladd r28=r24,1,r24 + // bias exponent + add r24=r29,r24;; +} +{.mmi + // get remainder of exponent/3 + sub r25=r25,r28 + // add sign to exponent + or r24=r24,r26 + nop.i 0;; +} +{.mfi + nop.m 0 + // P_2=-r*P_1 + (p6) fnma.s1 f6=f7,f6,f0 + // remainder=0 ? + (p6) cmp.eq.unc p7,p8=r0,r25;; +} +{.mfi + // f14=sign*2^{exponent/3} + (p6) setf.exp f14=r24 + nop.f 0 + // remainder = 1 ? + (p8) cmp.eq.unc p8,p12=1,r25;; +} +.pred.rel "mutex",p7,p8 +{.mfi + nop.m 0 + // remainder=0 -> use T=f10 + (p7) fma.s1 f8=f10,f6,f10 + nop.i 0 +} +{.mfi + nop.m 0 + // remainder =1 -> use f11 + (p8) fma.s1 f8=f11,f6,f11 + nop.i 0;; +} +{.mfi + nop.m 0 + // result=T+T*P_2 + (p12) fma.s.s0 f8=f8,f6,f8 + nop.i 0;; +} +{.mfb + nop.m 0 + // T*=sgn*2^{expon/3} + (p6) fma.s.s0 f8=f8,f14,f0 + br.ret.sptk b0;; +} +.endp cbrtf +ASM_SIZE_DIRECTIVE(cbrtf) |