windows-server-2003/base/crts/fpw32/tran/ia64/pow.s

.file "pow.s"

// Copyright (c) 2000-2002, 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.
//
// 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
// 2/03/00  Added p12 to definite over/under path. With odd power we did not
//          maintain the sign of x in this path.
// 4/04/00  Unwind support added
// 4/19/00  pow(+-1,inf) now returns NaN
//          pow(+-val, +-inf) returns 0 or inf, but now does not call error support
//          Added s1 to fcvt.fx because invalid flag was incorrectly set.
// 8/15/00  Bundle added after call to __libm_error_support to properly
//          set [the previously overwritten] GR_Parameter_RESULT.
// 9/07/00  Improved performance by eliminating bank conflicts and other stalls,
//          and tweaking the critical path
// 9/08/00  Per c99, pow(+-1,inf) now returns 1, and pow(+1,nan) returns 1
// 9/28/00  Updated NaN**0 path 
// 1/20/01  Fixed denormal flag settings.
// 2/13/01  Improved speed.
// 3/19/01  Reordered exp polynomial to improve speed and eliminate monotonicity
//          problem in round up, down, and to zero modes.  Also corrected 
//          overflow result when x negative, y odd in round up, down, zero.
// 6/14/01  Added brace missing from bundle
// 12/10/01 Corrected case where x negative, 2^52 <= |y| < 2^53, y odd integer.
// 12/20/01 Fixed monotonity problem in round to nearest.
// 02/08/02 Fixed overflow/underflow cases that were not calling error support.
//
// API
//==============================================================
// double pow(double)
// float  powf(float)
//
// Overview of operation
//==============================================================
//
// Three steps...
// 1. Log(x)
// 2. y Log(x)
// 3. exp(y log(x))
// 
// This means we work with the absolute value of x and merge in the sign later.
//      Log(x) = G + delta + r -rsq/2 + p
// G,delta depend on the exponent of x and table entries. The table entries are
// indexed by the exponent of x, called K.
// 
// The G and delta come out of the reduction; r is the reduced x.
// 
// B = frcpa(x)
// xB-1 is small means that B is the approximate inverse of x.
// 
//      Log(x) = Log( (1/B)(Bx) )
//             = Log(1/B) + Log(Bx)
//             = Log(1/B) + Log( 1 + (Bx-1))
// 
//      x  = 2^K 1.x_1x_2.....x_52
//      B= frcpa(x) = 2^-k Cm 
//      Log(1/B) = Log(1/(2^-K Cm))
//      Log(1/B) = Log((2^K/ Cm))
//      Log(1/B) = K Log(2) + Log(1/Cm)
// 
//      Log(x)   = K Log(2) + Log(1/Cm) + Log( 1 + (Bx-1))
// 
// If you take the significand of x, set the exponent to true 0, then Cm is
// the frcpa. We tabulate the Log(1/Cm) values. There are 256 of them.
// The frcpa table is indexed by 8 bits, the x_1 thru x_8.
// m = x_1x_2...x_8 is an 8-bit index.
// 
//      Log(1/Cm) = log(1/frcpa(1+m/256)) where m goes from 0 to 255.
// 
// We tabluate as two doubles, T and t, where T +t is the value itself.
// 
//      Log(x)   = (K Log(2)_hi + T) + (Log(2)_hi + t) + Log( 1 + (Bx-1))
//      Log(x)   =  G + delta           + Log( 1 + (Bx-1))
// 
// The Log( 1 + (Bx-1)) can be calculated as a series in r = Bx-1.
// 
//      Log( 1 + (Bx-1)) = r - rsq/2 + p
// 
// Then,
//    
//      yLog(x) = yG + y delta + y(r-rsq/2) + yp
//      yLog(x) = Z1 + e3      + Z2         + Z3 + (e2 + e3)
// 
// 
//     exp(yLog(x)) = exp(Z1 + Z2 + Z3) exp(e1 + e2 + e3)
//
//
//       exp(Z3) is another series.
//       exp(e1 + e2 + e3) is approximated as f3 = 1 + (e1 + e2 + e3)
//
//       Z1 (128/log2) = number of log2/128 in Z1 is N1
//       Z2 (128/log2) = number of log2/128 in Z2 is N2
//
//       s1 = Z1 - N1 log2/128
//       s2 = Z2 - N2 log2/128
//
//       s = s1 + s2
//       N = N1 + N2
//
//       exp(Z1 + Z2) = exp(Z)
//       exp(Z)       = exp(s) exp(N log2/128)
//
//       exp(r)       = exp(Z - N log2/128)
//
//      r = s + d = (Z - N (log2/128)_hi) -N (log2/128)_lo
//                =  Z - N (log2/128) 
//
//      Z         = s+d +N (log2/128)
//
//      exp(Z)    = exp(s) (1+d) exp(N log2/128)
//
//      N = M 128 + n
//
//      N log2/128 = M log2 + n log2/128
//
//      n is 8 binary digits = n_7n_6...n_1
//
//      n log2/128 = n_7n_6n_5 16 log2/128 + n_4n_3n_2n_1 log2/128
//      n log2/128 = n_7n_6n_5 log2/8 + n_4n_3n_2n_1 log2/128
//      n log2/128 = I2 log2/8 + I1 log2/128
//
//      N log2/128 = M log2 + I2 log2/8 + I1 log2/128 
//
//      exp(Z)    = exp(s) (1+d) exp(log(2^M) + log(2^I2/8) + log(2^I1/128))
//      exp(Z)    = exp(s) (1+d1) (1+d2)(2^M) 2^I2/8 2^I1/128
//      exp(Z)    = exp(s) f1 f2 (2^M) 2^I2/8 2^I1/128
//
// I1, I2 are table indices. Use a series for exp(s).
// Then get exp(Z) 
//
//     exp(yLog(x)) = exp(Z1 + Z2 + Z3) exp(e1 + e2 + e3)
//     exp(yLog(x)) = exp(Z) exp(Z3) f3 
//     exp(yLog(x)) = exp(Z)f3 exp(Z3)  
//     exp(yLog(x)) = A exp(Z3)  
//
// We actually calculate exp(Z3) -1.
// Then, 
//     exp(yLog(x)) = A + A( exp(Z3)   -1)
//

// Table Generation
//==============================================================

// The log values
// ==============
// The operation (K*log2_hi) must be exact. K is the true exponent of x.
// If we allow gradual underflow (denormals), K can be represented in 12 bits
// (as a two's complement number). We assume 13 bits as an engineering precaution.
// 
//           +------------+----------------+-+
//           |  13 bits   | 50 bits        | |
//           +------------+----------------+-+
//           0            1                66
//                        2                34
// 
// So we want the lsb(log2_hi) to be 2^-50
// We get log2 as a quad-extended (15-bit exponent, 128-bit significand)
// 
//      0 fffe b17217f7d1cf79ab c9e3b39803f2f6af (4...)
// 
// Consider numbering the bits left to right, starting at 0 thru 127.
// Bit 0 is the 2^-1 bit; bit 49 is the 2^-50 bit.
// 
//  ...79ab
//     0111 1001 1010 1011
//     44
//     89
// 
// So if we shift off the rightmost 14 bits, then (shift back only 
// the top half) we get
// 
//      0 fffe b17217f7d1cf4000 e6af278ece600fcb dabc000000000000
// 
// Put the right 64-bit signficand in an FR register, convert to double;
// it is exact. Put the next 128 bits into a quad register and round to double.
// The true exponent of the low part is -51.
// 
// hi is 0 fffe b17217f7d1cf4000
// lo is 0 ffcc e6af278ece601000
// 
// Convert to double memory format and get
// 
// hi is 0x3fe62e42fefa39e8
// lo is 0x3cccd5e4f1d9cc02 
// 
// log2_hi + log2_lo is an accurate value for log2.
// 
// 
// The T and t values
// ==================
// A similar method is used to generate the T and t values.
// 
// K * log2_hi + T  must be exact.
// 
// Smallest T,t
// ----------
// The smallest T,t is 
//       T                   t
// data8 0x3f60040155d58800, 0x3c93bce0ce3ddd81  log(1/frcpa(1+0/256))=  +1.95503e-003
// 
// The exponent is 0x3f6 (biased)  or -9 (true).
// For the smallest T value, what we want is to clip the significand such that
// when it is shifted right by 9, its lsb is in the bit for 2^-51. The 9 is the specific 
// for the first entry. In general, it is 0xffff - (biased 15-bit exponent).

// Independently, what we have calculated is the table value as a quad precision number.
// Table entry 1 is
// 0 fff6 80200aaeac44ef38 338f77605fdf8000
// 
// We store this quad precision number in a data structure that is
//    sign:           1 
//    exponent:      15
//    signficand_hi: 64 (includes explicit bit)
//    signficand_lo: 49
// Because the explicit bit is included, the significand is 113 bits.
// 
// Consider significand_hi for table entry 1.
// 
// 
// +-+--- ... -------+--------------------+
// | |
// +-+--- ... -------+--------------------+
// 0 1               4444444455555555556666
//                   2345678901234567890123
// 
// Labeled as above, bit 0 is 2^0, bit 1 is 2^-1, etc.
// Bit 42 is 2^-42. If we shift to the right by 9, the bit in
// bit 42 goes in 51.
// 
// So what we want to do is shift bits 43 thru 63 into significand_lo.
// This is shifting bit 42 into bit 63, taking care to retain the shifted-off bits.
// Then shifting (just with signficaand_hi) back into bit 42. 
//  
// The shift_value is 63-42 = 21. In general, this is 
//      63 - (51 -(0xffff - 0xfff6))
// For this example, it is
//      63 - (51 - 9) = 63 - 42  = 21
// 
// This means we are shifting 21 bits into significand_lo.  We must maintain more
// that a 128-bit signficand not to lose bits. So before the shift we put the 128-bit 
// significand into a 256-bit signficand and then shift.
// The 256-bit significand has four parts: hh, hl, lh, and ll.
// 
// Start off with
//      hh         hl         lh         ll
//      <64>       <49><15_0> <64_0>     <64_0>
// 
// After shift by 21 (then return for significand_hi),
//      <43><21_0> <21><43>   <6><58_0>  <64_0>
// 
// Take the hh part and convert to a double. There is no rounding here.
// The conversion is exact. The true exponent of the high part is the same as the
// true exponent of the input quad.
// 
// We have some 64 plus significand bits for the low part. In this example, we have
// 70 bits. We want to round this to a double. Put them in a quad and then do a quad fnorm.
// For this example the true exponent of the low part is 
//      true_exponent_of_high - 43 = true_exponent_of_high - (64-21)
// In general, this is 
//      true_exponent_of_high - (64 - shift_value)  
// 
// 
// Largest T,t
// ----------
// The largest T,t is
// data8 0x3fe62643fecf9742, 0x3c9e3147684bd37d    log(1/frcpa(1+255/256))=  +6.92171e-001
// 
// Table entry 256 is
// 0 fffe b1321ff67cba178c 51da12f4df5a0000
// 
// The shift value is 
//      63 - (51 -(0xffff - 0xfffe)) = 13
// 
// The true exponent of the low part is 
//      true_exponent_of_high - (64 - shift_value)
//      -1 - (64-13) = -52
// Biased as a double, this is 0x3cb
// 
// 
// 
// So then lsb(T) must be >= 2^-51
// msb(Klog2_hi) <= 2^12
// 
//              +--------+---------+
//              |       51 bits    | <== largest T
//              +--------+---------+
//              | 9 bits | 42 bits | <== smallest T
// +------------+----------------+-+
// |  13 bits   | 50 bits        | |
// +------------+----------------+-+



// Special Cases
//==============================================================

//                                   double     float
// overflow                          error 24   30

// underflow                         error 25   31

// X zero  Y zero
//  +0     +0                 +1     error 26   32
//  -0     +0                 +1     error 26   32
//  +0     -0                 +1     error 26   32
//  -0     -0                 +1     error 26   32

// X zero  Y negative
//  +0     -odd integer       +inf   error 27   33  divide-by-zero
//  -0     -odd integer       -inf   error 27   33  divide-by-zero
//  +0     !-odd integer      +inf   error 27   33  divide-by-zero
//  -0     !-odd integer      +inf   error 27   33  divide-by-zero
//  +0     -inf               +inf   error 27   33  divide-by-zero
//  -0     -inf               +inf   error 27   33  divide-by-zero

// X zero  Y positve
//  +0     +odd integer       +0
//  -0     +odd integer       -0
//  +0     !+odd integer      +0
//  -0     !+odd integer      +0
//  +0     +inf               +0
//  -0     +inf               +0
//  +0     Y NaN              quiet Y               invalid if Y SNaN
//  -0     Y NaN              quiet Y               invalid if Y SNaN

// X one
//  -1     Y inf              +1
//  -1     Y NaN              quiet Y               invalid if Y SNaN
//  +1     Y NaN              +1                    invalid if Y SNaN
//  +1     Y any else         +1

// X -     Y not integer      QNAN   error 28   34  invalid

// X NaN   Y 0                +1     error 29   35
// X NaN   Y NaN              quiet X               invalid if X or Y SNaN
// X NaN   Y any else         quiet X               invalid if X SNaN
// X !+1   Y NaN              quiet Y               invalid if Y SNaN


// X +inf  Y >0               +inf
// X -inf  Y >0, !odd integer +inf
// X -inf  Y >0, odd integer  -inf

// X +inf  Y <0               +0
// X -inf  Y <0, !odd integer +0
// X -inf  Y <0, odd integer  -0

// X +inf  Y =0               +1
// X -inf  Y =0               +1

// |X|<1   Y +inf             +0
// |X|<1   Y -inf             +inf
// |X|>1   Y +inf             +inf
// |X|>1   Y -inf             +0

// X any   Y =0               +1

// Assembly macros
//==============================================================

// integer registers used

pow_AD_Tt                 = r33
pow_GR_FFF7               = r34
pow_GR_exp_Y              = r34 // duplicate
pow_GR_17ones             = r35

pow_AD_P                  = r36
pow_AD_Q                  = r37
pow_AD_tbl1               = r38
pow_AD_tbl2               = r39
pow_GR_exp_X              = r40
pow_GR_true_exp_X         = r40 // duplicate

pow_GR_offset             = r41
pow_GR_exp_Xm1            = r42
pow_GR_sig_X              = r43
pow_GR_signexp_X          = r44
pow_GR_xneg_yodd          = r45

pow_GR_signexp_Xm1        = r46
pow_GR_int_W1             = r47
pow_GR_int_W2             = r48
pow_GR_int_N              = r49
pow_GR_index1             = r50

pow_GR_index2             = r51
pow_AD_T1                 = r52
pow_AD_T2                 = r53
pow_int_GR_M              = r54
pow_GR_10033              = r55

pow_GR_16ones             = r56
pow_GR_sig_int_Y          = r57
pow_GR_sign_Y_Gpr         = r58
pow_GR_17ones_m1          = r59
pow_GR_one                = r60
pow_GR_sign_Y             = r60 

pow_GR_signexp_Y_Gpr      = r61 
pow_GR_exp_Y_Gpr          = r62 
pow_GR_true_exp_Y_Gpr     = r63 
pow_GR_signexp_Y          = r64 
pow_GR_x_one              = r66 
pow_GR_y_zero             = r67 
pow_GR_exp_2toM63         = r68 
pow_GR_big_pos            = r69
pow_GR_big_neg            = r70

GR_SAVE_B0                = r65
GR_SAVE_GP                = r66
GR_SAVE_PFS               = r67

GR_Parameter_X            = r68
GR_Parameter_Y            = r69
GR_Parameter_RESULT       = r70
pow_GR_tag                = r71


// floating point registers used

POW_B                     = f32
POW_NORM_X                = f33
POW_Xm1                   = f34
POW_r1                    = f34
POW_P4                    = f35

POW_P5                    = f36
POW_NORM_Y                = f37
POW_Q2                    = f38
POW_Q3                    = f39
POW_P2                    = f40

POW_P3                    = f41
POW_P0                    = f42
POW_log2_lo               = f43
POW_r                     = f44
POW_Q0_half               = f45

POW_Q1                    = f46  
POW_tmp                   = f47  
POW_log2_hi               = f48
POW_Q4                    = f49
POW_P1                    = f50

POW_log2_by_128_hi        = f51
POW_inv_log2_by_128       = f52
POW_rsq                   = f53
POW_Yrcub                 = f54
POW_log2_by_128_lo        = f55

POW_v6                    = f56
POW_xsq                   = f57
POW_v4                    = f58
POW_v2                    = f59
POW_T                     = f60

POW_Tt                    = f61
POW_RSHF                  = f62
POW_v21ps                 = f63
POW_s4                    = f64
POW_twoV                  = f65

POW_U                     = f66
POW_G                     = f67
POW_delta                 = f68
POW_v3                    = f69
POW_V                     = f70

POW_p                     = f71
POW_Z1                    = f72
POW_e3                    = f73
POW_e2                    = f74
POW_Z2                    = f75

POW_e1                    = f76
POW_W1                    = f77
POW_UmZ2                  = f78
POW_W2                    = f79
POW_Z3                    = f80

POW_int_W1                = f81
POW_e12                   = f82
POW_int_W2                = f83
POW_UmZ2pV                = f84
POW_Z3sq                  = f85

POW_e123                  = f86
POW_N1float               = f87
POW_N2float               = f88
POW_f3                    = f89
POW_q                     = f90

POW_s1                    = f91
POW_Nfloat                = f92
POW_s2                    = f93
POW_f2                    = f94
POW_f1                    = f95

POW_T1                    = f96
POW_T2                    = f97
POW_2M                    = f98
POW_s                     = f99
POW_f12                   = f100

POW_ssq                   = f101
POW_T1T2                  = f102
POW_1ps                   = f103
POW_A                     = f104
POW_es                    = f105

POW_Xp1                   = f106
POW_int_K                 = f107
POW_K                     = f108
POW_f123                  = f109
POW_Gpr                   = f110

POW_Y_Gpr                 = f111 
POW_int_Y                 = f112
POW_abs_q                 = f114
POW_2toM63                = f115

POW_float_int_Y           = f116
POW_ftz_urm_f8            = f117
POW_wre_urm_f8            = f118
POW_big_neg               = f119
POW_big_pos               = f120

// Data tables
//==============================================================

.data

.align 16

pow_table_P:
data8 0x8000F7B249FF332D, 0x0000BFFC  // P_5
data8 0xAAAAAAA9E7902C7F, 0x0000BFFC  // P_3
data8 0x80000000000018E5, 0x0000BFFD  // P_1
data8 0xb8aa3b295c17f0bc, 0x00004006  // inv_ln2_by_128


data8 0x3FA5555555554A9E // Q_2
data8 0x3F8111124F4DD9F9 // Q_3
data8 0x3FE0000000000000 // Q_0
data8 0x3FC5555555554733 // Q_1
data8 0x3F56C16D9360FFA0 // Q_4
data8 0x43e8000000000000 // Right shift constant for exp
data8 0xc9e3b39803f2f6af, 0x00003fb7  // ln2_by_128_lo
data8 0x0000000000000000 // pad to eliminate bank conflicts with pow_table_Q
data8 0x0000000000000000 // pad to eliminate bank conflicts with pow_table_Q

pow_table_Q:
data8 0x9249FE7F0DC423CF, 0x00003FFC  // P_4
data8 0xCCCCCCCC4ED2BA7F, 0x00003FFC  // P_2
data8 0xAAAAAAAAAAAAB505, 0x00003FFD  // P_0
data8 0x3fe62e42fefa39e8, 0x3cccd5e4f1d9cc02 // log2 hi lo =  +6.93147e-001
data8 0xb17217f7d1cf79ab, 0x00003ff7  // ln2_by_128_hi


pow_Tt:
data8 0x3f60040155d58800, 0x3c93bce0ce3ddd81 // log(1/frcpa(1+0/256))=  +1.95503e-003
data8 0x3f78121214586a00, 0x3cb540e0a5cfc9bc // log(1/frcpa(1+1/256))=  +5.87661e-003
data8 0x3f841929f9683200, 0x3cbdf1d57404da1f // log(1/frcpa(1+2/256))=  +9.81362e-003
data8 0x3f8c317384c75f00, 0x3c69806208c04c22 // log(1/frcpa(1+3/256))=  +1.37662e-002
data8 0x3f91a6b91ac73380, 0x3c7874daa716eb32 // log(1/frcpa(1+4/256))=  +1.72376e-002
data8 0x3f95ba9a5d9ac000, 0x3cacbb84e08d78ac // log(1/frcpa(1+5/256))=  +2.12196e-002
data8 0x3f99d2a807432580, 0x3cbcf80538b441e1 // log(1/frcpa(1+6/256))=  +2.52177e-002
data8 0x3f9d6b2725979800, 0x3c6095e5c8f8f359 // log(1/frcpa(1+7/256))=  +2.87291e-002
data8 0x3fa0c58fa19dfa80, 0x3cb4c5d4e9d0dda2 // log(1/frcpa(1+8/256))=  +3.27573e-002
data8 0x3fa2954c78cbce00, 0x3caa932b860ab8d6 // log(1/frcpa(1+9/256))=  +3.62953e-002
data8 0x3fa4a94d2da96c40, 0x3ca670452b76bbd5 // log(1/frcpa(1+10/256))=  +4.03542e-002
data8 0x3fa67c94f2d4bb40, 0x3ca84104f9941798 // log(1/frcpa(1+11/256))=  +4.39192e-002
data8 0x3fa85188b630f040, 0x3cb40a882cbf0153 // log(1/frcpa(1+12/256))=  +4.74971e-002
data8 0x3faa6b8abe73af40, 0x3c988d46e25c9059 // log(1/frcpa(1+13/256))=  +5.16017e-002
data8 0x3fac441e06f72a80, 0x3cae3e930a1a2a96 // log(1/frcpa(1+14/256))=  +5.52072e-002
data8 0x3fae1e6713606d00, 0x3c8a796f6283b580 // log(1/frcpa(1+15/256))=  +5.88257e-002
data8 0x3faffa6911ab9300, 0x3c5193070351e88a // log(1/frcpa(1+16/256))=  +6.24574e-002
data8 0x3fb0ec139c5da600, 0x3c623f2a75eb992d // log(1/frcpa(1+17/256))=  +6.61022e-002
data8 0x3fb1dbd2643d1900, 0x3ca649b2ef8927f0 // log(1/frcpa(1+18/256))=  +6.97605e-002
data8 0x3fb2cc7284fe5f00, 0x3cbc5e86599513e2 // log(1/frcpa(1+19/256))=  +7.34321e-002
data8 0x3fb3bdf5a7d1ee60, 0x3c90bd4bb69dada3 // log(1/frcpa(1+20/256))=  +7.71173e-002
data8 0x3fb4b05d7aa012e0, 0x3c54e377c9b8a54f // log(1/frcpa(1+21/256))=  +8.08161e-002
data8 0x3fb580db7ceb5700, 0x3c7fdb2f98354cde // log(1/frcpa(1+22/256))=  +8.39975e-002
data8 0x3fb674f089365a60, 0x3cb9994c9d3301c1 // log(1/frcpa(1+23/256))=  +8.77219e-002
data8 0x3fb769ef2c6b5680, 0x3caaec639db52a79 // log(1/frcpa(1+24/256))=  +9.14602e-002
data8 0x3fb85fd927506a40, 0x3c9f9f99a3cf8e25 // log(1/frcpa(1+25/256))=  +9.52125e-002
data8 0x3fb9335e5d594980, 0x3ca15c3abd47d99a // log(1/frcpa(1+26/256))=  +9.84401e-002
data8 0x3fba2b0220c8e5e0, 0x3cb4ca639adf6fc3 // log(1/frcpa(1+27/256))=  +1.02219e-001
data8 0x3fbb0004ac1a86a0, 0x3ca7cb81bf959a59 // log(1/frcpa(1+28/256))=  +1.05469e-001
data8 0x3fbbf968769fca00, 0x3cb0c646c121418e // log(1/frcpa(1+29/256))=  +1.09274e-001
data8 0x3fbccfedbfee13a0, 0x3ca0465fce24ab4b // log(1/frcpa(1+30/256))=  +1.12548e-001
data8 0x3fbda727638446a0, 0x3c82803f4e2e6603 // log(1/frcpa(1+31/256))=  +1.15832e-001
data8 0x3fbea3257fe10f60, 0x3cb986a3f2313d1a // log(1/frcpa(1+32/256))=  +1.19677e-001
data8 0x3fbf7be9fedbfde0, 0x3c97d16a6a621cf4 // log(1/frcpa(1+33/256))=  +1.22985e-001
data8 0x3fc02ab352ff25f0, 0x3c9cc6baad365600 // log(1/frcpa(1+34/256))=  +1.26303e-001
data8 0x3fc097ce579d2040, 0x3cb9ba16d329440b // log(1/frcpa(1+35/256))=  +1.29633e-001
data8 0x3fc1178e8227e470, 0x3cb7bc671683f8e6 // log(1/frcpa(1+36/256))=  +1.33531e-001
data8 0x3fc185747dbecf30, 0x3c9d1116f66d2345 // log(1/frcpa(1+37/256))=  +1.36885e-001
data8 0x3fc1f3b925f25d40, 0x3c8162c9ef939ac6 // log(1/frcpa(1+38/256))=  +1.40250e-001
data8 0x3fc2625d1e6ddf50, 0x3caad3a1ec384fc3 // log(1/frcpa(1+39/256))=  +1.43627e-001
data8 0x3fc2d1610c868130, 0x3cb3ad997036941b // log(1/frcpa(1+40/256))=  +1.47015e-001
data8 0x3fc340c597411420, 0x3cbc2308262c7998 // log(1/frcpa(1+41/256))=  +1.50414e-001
data8 0x3fc3b08b6757f2a0, 0x3cb2170d6cdf0526 // log(1/frcpa(1+42/256))=  +1.53825e-001
data8 0x3fc40dfb08378000, 0x3c9bb453c4f7b685 // log(1/frcpa(1+43/256))=  +1.56677e-001
data8 0x3fc47e74e8ca5f70, 0x3cb836a48fdfce9d // log(1/frcpa(1+44/256))=  +1.60109e-001
data8 0x3fc4ef51f6466de0, 0x3ca07a43919aa64b // log(1/frcpa(1+45/256))=  +1.63553e-001
data8 0x3fc56092e02ba510, 0x3ca85006899d97b0 // log(1/frcpa(1+46/256))=  +1.67010e-001
data8 0x3fc5d23857cd74d0, 0x3ca30a5ba6e7abbe // log(1/frcpa(1+47/256))=  +1.70478e-001
data8 0x3fc6313a37335d70, 0x3ca905586f0ac97e // log(1/frcpa(1+48/256))=  +1.73377e-001
data8 0x3fc6a399dabbd380, 0x3c9b2c6657a96684 // log(1/frcpa(1+49/256))=  +1.76868e-001
data8 0x3fc70337dd3ce410, 0x3cb50bc52f55cdd8 // log(1/frcpa(1+50/256))=  +1.79786e-001
data8 0x3fc77654128f6120, 0x3cad2eb7c9a39efe // log(1/frcpa(1+51/256))=  +1.83299e-001
data8 0x3fc7e9d82a0b0220, 0x3cba127e90393c01 // log(1/frcpa(1+52/256))=  +1.86824e-001
data8 0x3fc84a6b759f5120, 0x3cbd7fd52079f706 // log(1/frcpa(1+53/256))=  +1.89771e-001
data8 0x3fc8ab47d5f5a300, 0x3cbfae141751a3de // log(1/frcpa(1+54/256))=  +1.92727e-001
data8 0x3fc91fe490965810, 0x3cb69cf30a1c319e // log(1/frcpa(1+55/256))=  +1.96286e-001
data8 0x3fc981634011aa70, 0x3ca5bb3d208bc42a // log(1/frcpa(1+56/256))=  +1.99261e-001
data8 0x3fc9f6c407089660, 0x3ca04d68658179a0 // log(1/frcpa(1+57/256))=  +2.02843e-001
data8 0x3fca58e729348f40, 0x3c99f5411546c286 // log(1/frcpa(1+58/256))=  +2.05838e-001
data8 0x3fcabb55c31693a0, 0x3cb9a5350eb327d5 // log(1/frcpa(1+59/256))=  +2.08842e-001
data8 0x3fcb1e104919efd0, 0x3c18965fcce7c406 // log(1/frcpa(1+60/256))=  +2.11855e-001
data8 0x3fcb94ee93e367c0, 0x3cb503716da45184 // log(1/frcpa(1+61/256))=  +2.15483e-001
data8 0x3fcbf851c0675550, 0x3cbdf1b3f7ab5378 // log(1/frcpa(1+62/256))=  +2.18516e-001
data8 0x3fcc5c0254bf23a0, 0x3ca7aab9ed0b1d7b // log(1/frcpa(1+63/256))=  +2.21558e-001
data8 0x3fccc000c9db3c50, 0x3c92a7a2a850072a // log(1/frcpa(1+64/256))=  +2.24609e-001
data8 0x3fcd244d99c85670, 0x3c9f6019120edf4c // log(1/frcpa(1+65/256))=  +2.27670e-001
data8 0x3fcd88e93fb2f450, 0x3c6affb96815e081 // log(1/frcpa(1+66/256))=  +2.30741e-001
data8 0x3fcdedd437eaef00, 0x3c72553595897976 // log(1/frcpa(1+67/256))=  +2.33820e-001
data8 0x3fce530effe71010, 0x3c90913b020fa182 // log(1/frcpa(1+68/256))=  +2.36910e-001
data8 0x3fceb89a1648b970, 0x3c837ba4045bfd25 // log(1/frcpa(1+69/256))=  +2.40009e-001
data8 0x3fcf1e75fadf9bd0, 0x3cbcea6d13e0498d // log(1/frcpa(1+70/256))=  +2.43117e-001
data8 0x3fcf84a32ead7c30, 0x3ca5e3a67b3c6d77 // log(1/frcpa(1+71/256))=  +2.46235e-001
data8 0x3fcfeb2233ea07c0, 0x3cba0c6f0049c5a6 // log(1/frcpa(1+72/256))=  +2.49363e-001
data8 0x3fd028f9c7035c18, 0x3cb0a30b06677ff6 // log(1/frcpa(1+73/256))=  +2.52501e-001
data8 0x3fd05c8be0d96358, 0x3ca0f1c77ccb5865 // log(1/frcpa(1+74/256))=  +2.55649e-001
data8 0x3fd085eb8f8ae790, 0x3cbd513f45fe7a97 // log(1/frcpa(1+75/256))=  +2.58174e-001
data8 0x3fd0b9c8e32d1910, 0x3c927449047ca006 // log(1/frcpa(1+76/256))=  +2.61339e-001
data8 0x3fd0edd060b78080, 0x3c89b52d8435f53e // log(1/frcpa(1+77/256))=  +2.64515e-001
data8 0x3fd122024cf00638, 0x3cbdd976fabda4bd // log(1/frcpa(1+78/256))=  +2.67701e-001
data8 0x3fd14be2927aecd0, 0x3cb02f90ad0bc471 // log(1/frcpa(1+79/256))=  +2.70257e-001
data8 0x3fd180618ef18ad8, 0x3cbd003792c71a98 // log(1/frcpa(1+80/256))=  +2.73461e-001
data8 0x3fd1b50bbe2fc638, 0x3ca9ae64c6403ead // log(1/frcpa(1+81/256))=  +2.76675e-001
data8 0x3fd1df4cc7cf2428, 0x3cb43f0455f7e395 // log(1/frcpa(1+82/256))=  +2.79254e-001
data8 0x3fd214456d0eb8d0, 0x3cb0fbd748d75d30 // log(1/frcpa(1+83/256))=  +2.82487e-001
data8 0x3fd23ec5991eba48, 0x3c906edd746b77e2 // log(1/frcpa(1+84/256))=  +2.85081e-001
data8 0x3fd2740d9f870af8, 0x3ca9802e6a00a670 // log(1/frcpa(1+85/256))=  +2.88333e-001
data8 0x3fd29ecdabcdfa00, 0x3cacecef70890cfa // log(1/frcpa(1+86/256))=  +2.90943e-001
data8 0x3fd2d46602adcce8, 0x3cb97911955f3521 // log(1/frcpa(1+87/256))=  +2.94214e-001
data8 0x3fd2ff66b04ea9d0, 0x3cb12dabe191d1c9 // log(1/frcpa(1+88/256))=  +2.96838e-001
data8 0x3fd335504b355a30, 0x3cbdf9139df924ec // log(1/frcpa(1+89/256))=  +3.00129e-001
data8 0x3fd360925ec44f58, 0x3cb253e68977a1e3 // log(1/frcpa(1+90/256))=  +3.02769e-001
data8 0x3fd38bf1c3337e70, 0x3cb3d283d2a2da21 // log(1/frcpa(1+91/256))=  +3.05417e-001
data8 0x3fd3c25277333180, 0x3cadaa5b035eae27 // log(1/frcpa(1+92/256))=  +3.08735e-001
data8 0x3fd3edf463c16838, 0x3cb983d680d3c108 // log(1/frcpa(1+93/256))=  +3.11399e-001
data8 0x3fd419b423d5e8c0, 0x3cbc86dd921c139d // log(1/frcpa(1+94/256))=  +3.14069e-001
data8 0x3fd44591e0539f48, 0x3c86a76d6dc2782e // log(1/frcpa(1+95/256))=  +3.16746e-001
data8 0x3fd47c9175b6f0a8, 0x3cb59a2e013c6b5f // log(1/frcpa(1+96/256))=  +3.20103e-001
data8 0x3fd4a8b341552b08, 0x3c93f1e86e468694 // log(1/frcpa(1+97/256))=  +3.22797e-001
data8 0x3fd4d4f390890198, 0x3cbf5e4ea7c5105a // log(1/frcpa(1+98/256))=  +3.25498e-001
data8 0x3fd501528da1f960, 0x3cbf58da53e9ad10 // log(1/frcpa(1+99/256))=  +3.28206e-001
data8 0x3fd52dd06347d4f0, 0x3cb98a28cebf6eef // log(1/frcpa(1+100/256))=  +3.30921e-001
data8 0x3fd55a6d3c7b8a88, 0x3c9c76b67c2d1fd4 // log(1/frcpa(1+101/256))=  +3.33644e-001
data8 0x3fd5925d2b112a58, 0x3c9029616a4331b8 // log(1/frcpa(1+102/256))=  +3.37058e-001
data8 0x3fd5bf406b543db0, 0x3c9fb8292ecfc820 // log(1/frcpa(1+103/256))=  +3.39798e-001
data8 0x3fd5ec433d5c35a8, 0x3cb71a1229d17eec // log(1/frcpa(1+104/256))=  +3.42545e-001
data8 0x3fd61965cdb02c18, 0x3cbba94fe1dbb8d2 // log(1/frcpa(1+105/256))=  +3.45300e-001
data8 0x3fd646a84935b2a0, 0x3c9ee496d2c9ae57 // log(1/frcpa(1+106/256))=  +3.48063e-001
data8 0x3fd6740add31de90, 0x3cb1da3a6c7a9dfd // log(1/frcpa(1+107/256))=  +3.50833e-001
data8 0x3fd6a18db74a58c0, 0x3cb494c257add8dc // log(1/frcpa(1+108/256))=  +3.53610e-001
data8 0x3fd6cf31058670e8, 0x3cb0b244a70a8da9 // log(1/frcpa(1+109/256))=  +3.56396e-001
data8 0x3fd6f180e852f0b8, 0x3c9db7aefa866720 // log(1/frcpa(1+110/256))=  +3.58490e-001
data8 0x3fd71f5d71b894e8, 0x3cbe91c4bf324957 // log(1/frcpa(1+111/256))=  +3.61289e-001
data8 0x3fd74d5aefd66d58, 0x3cb06b3d9bfac023 // log(1/frcpa(1+112/256))=  +3.64096e-001
data8 0x3fd77b79922bd378, 0x3cb727d8804491f4 // log(1/frcpa(1+113/256))=  +3.66911e-001
data8 0x3fd7a9b9889f19e0, 0x3ca2ef22df5bc543 // log(1/frcpa(1+114/256))=  +3.69734e-001
data8 0x3fd7d81b037eb6a0, 0x3cb8fd3ba07a7ece // log(1/frcpa(1+115/256))=  +3.72565e-001
data8 0x3fd8069e33827230, 0x3c8bd1e25866e61a // log(1/frcpa(1+116/256))=  +3.75404e-001
data8 0x3fd82996d3ef8bc8, 0x3ca5aab9f5928928 // log(1/frcpa(1+117/256))=  +3.77538e-001
data8 0x3fd85855776dcbf8, 0x3ca56f33337789d6 // log(1/frcpa(1+118/256))=  +3.80391e-001
data8 0x3fd8873658327cc8, 0x3cbb8ef0401db49d // log(1/frcpa(1+119/256))=  +3.83253e-001
data8 0x3fd8aa75973ab8c8, 0x3cbb9961f509a680 // log(1/frcpa(1+120/256))=  +3.85404e-001
data8 0x3fd8d992dc8824e0, 0x3cb220512a53732d // log(1/frcpa(1+121/256))=  +3.88280e-001
data8 0x3fd908d2ea7d9510, 0x3c985f0e513bfb5c // log(1/frcpa(1+122/256))=  +3.91164e-001
data8 0x3fd92c59e79c0e50, 0x3cb82e073fd30d63 // log(1/frcpa(1+123/256))=  +3.93332e-001
data8 0x3fd95bd750ee3ed0, 0x3ca4aa7cdb6dd8a8 // log(1/frcpa(1+124/256))=  +3.96231e-001
data8 0x3fd98b7811a3ee58, 0x3caa93a5b660893e // log(1/frcpa(1+125/256))=  +3.99138e-001
data8 0x3fd9af47f33d4068, 0x3cac294b3b3190ba // log(1/frcpa(1+126/256))=  +4.01323e-001
data8 0x3fd9df270c1914a0, 0x3cbe1a58fd0cd67e // log(1/frcpa(1+127/256))=  +4.04245e-001
data8 0x3fda0325ed14fda0, 0x3cb1efa7950fb57e // log(1/frcpa(1+128/256))=  +4.06442e-001
data8 0x3fda33440224fa78, 0x3c8915fe75e7d477 // log(1/frcpa(1+129/256))=  +4.09379e-001
data8 0x3fda57725e80c380, 0x3ca72bd1062b1b7f // log(1/frcpa(1+130/256))=  +4.11587e-001
data8 0x3fda87d0165dd198, 0x3c91f7845f58dbad // log(1/frcpa(1+131/256))=  +4.14539e-001
data8 0x3fdaac2e6c03f890, 0x3cb6f237a911c509 // log(1/frcpa(1+132/256))=  +4.16759e-001
data8 0x3fdadccc6fdf6a80, 0x3c90ddc4b7687169 // log(1/frcpa(1+133/256))=  +4.19726e-001
data8 0x3fdb015b3eb1e790, 0x3c692dd7d90e1e8e // log(1/frcpa(1+134/256))=  +4.21958e-001
data8 0x3fdb323a3a635948, 0x3c6f85655cbe14de // log(1/frcpa(1+135/256))=  +4.24941e-001
data8 0x3fdb56fa04462908, 0x3c95252d841994de // log(1/frcpa(1+136/256))=  +4.27184e-001
data8 0x3fdb881aa659bc90, 0x3caa53a745a3642f // log(1/frcpa(1+137/256))=  +4.30182e-001
data8 0x3fdbad0bef3db160, 0x3cb32f2540dcc16a // log(1/frcpa(1+138/256))=  +4.32437e-001
data8 0x3fdbd21297781c28, 0x3cbd8e891e106f1d // log(1/frcpa(1+139/256))=  +4.34697e-001
data8 0x3fdc039236f08818, 0x3c809435af522ba7 // log(1/frcpa(1+140/256))=  +4.37718e-001
data8 0x3fdc28cb1e4d32f8, 0x3cb3944752fbd81e // log(1/frcpa(1+141/256))=  +4.39990e-001
data8 0x3fdc4e19b84723c0, 0x3c9a465260cd3fe5 // log(1/frcpa(1+142/256))=  +4.42267e-001
data8 0x3fdc7ff9c74554c8, 0x3c92447d5b6ca369 // log(1/frcpa(1+143/256))=  +4.45311e-001
data8 0x3fdca57b64e9db00, 0x3cb44344a8a00c82 // log(1/frcpa(1+144/256))=  +4.47600e-001
data8 0x3fdccb130a5ceba8, 0x3cbefaddfb97b73f // log(1/frcpa(1+145/256))=  +4.49895e-001
data8 0x3fdcf0c0d18f3268, 0x3cbd3e7bfee57898 // log(1/frcpa(1+146/256))=  +4.52194e-001
data8 0x3fdd232075b5a200, 0x3c9222599987447c // log(1/frcpa(1+147/256))=  +4.55269e-001
data8 0x3fdd490246defa68, 0x3cabafe9a767a80d // log(1/frcpa(1+148/256))=  +4.57581e-001
data8 0x3fdd6efa918d25c8, 0x3cb58a2624e1c6fd // log(1/frcpa(1+149/256))=  +4.59899e-001
data8 0x3fdd9509707ae528, 0x3cbdc3babce578e7 // log(1/frcpa(1+150/256))=  +4.62221e-001
data8 0x3fddbb2efe92c550, 0x3cb0ac0943c434a4 // log(1/frcpa(1+151/256))=  +4.64550e-001
data8 0x3fddee2f3445e4a8, 0x3cbba9d07ce820e8 // log(1/frcpa(1+152/256))=  +4.67663e-001
data8 0x3fde148a1a2726c8, 0x3cb6537e3375b205 // log(1/frcpa(1+153/256))=  +4.70004e-001
data8 0x3fde3afc0a49ff38, 0x3cbfed5518dbc20e // log(1/frcpa(1+154/256))=  +4.72350e-001
data8 0x3fde6185206d5168, 0x3cb6572601f73d5c // log(1/frcpa(1+155/256))=  +4.74702e-001
data8 0x3fde882578823d50, 0x3c9b24abd4584d1a // log(1/frcpa(1+156/256))=  +4.77060e-001
data8 0x3fdeaedd2eac9908, 0x3cb0ceb5e4d2c8f7 // log(1/frcpa(1+157/256))=  +4.79423e-001
data8 0x3fded5ac5f436be0, 0x3ca72f21f1f5238e // log(1/frcpa(1+158/256))=  +4.81792e-001
data8 0x3fdefc9326d16ab8, 0x3c85081a1639a45c // log(1/frcpa(1+159/256))=  +4.84166e-001
data8 0x3fdf2391a21575f8, 0x3cbf11015bdd297a // log(1/frcpa(1+160/256))=  +4.86546e-001
data8 0x3fdf4aa7ee031928, 0x3cb3795bc052a2d1 // log(1/frcpa(1+161/256))=  +4.88932e-001
data8 0x3fdf71d627c30bb0, 0x3c35c61f0f5a88f3 // log(1/frcpa(1+162/256))=  +4.91323e-001
data8 0x3fdf991c6cb3b378, 0x3c97d99419be6028 // log(1/frcpa(1+163/256))=  +4.93720e-001
data8 0x3fdfc07ada69a908, 0x3cbfe9341ded70b1 // log(1/frcpa(1+164/256))=  +4.96123e-001
data8 0x3fdfe7f18eb03d38, 0x3cb85718a640c33f // log(1/frcpa(1+165/256))=  +4.98532e-001
data8 0x3fe007c053c5002c, 0x3cb3addc9c065f09 // log(1/frcpa(1+166/256))=  +5.00946e-001
data8 0x3fe01b942198a5a0, 0x3c9d5aa4c77da6ac // log(1/frcpa(1+167/256))=  +5.03367e-001
data8 0x3fe02f74400c64e8, 0x3cb5a0ee4450ef52 // log(1/frcpa(1+168/256))=  +5.05793e-001
data8 0x3fe04360be7603ac, 0x3c9dd00c35630fe0 // log(1/frcpa(1+169/256))=  +5.08225e-001
data8 0x3fe05759ac47fe30, 0x3cbd063e1f0bd82c // log(1/frcpa(1+170/256))=  +5.10663e-001
data8 0x3fe06b5f1911cf50, 0x3cae8da674af5289 // log(1/frcpa(1+171/256))=  +5.13107e-001
data8 0x3fe078bf0533c568, 0x3c62241edf5fd1f7 // log(1/frcpa(1+172/256))=  +5.14740e-001
data8 0x3fe08cd9687e7b0c, 0x3cb3007febcca227 // log(1/frcpa(1+173/256))=  +5.17194e-001
data8 0x3fe0a10074cf9018, 0x3ca496e84603816b // log(1/frcpa(1+174/256))=  +5.19654e-001
data8 0x3fe0b5343a234474, 0x3cb46098d14fc90a // log(1/frcpa(1+175/256))=  +5.22120e-001
data8 0x3fe0c974c89431cc, 0x3cac0a7cdcbb86c6 // log(1/frcpa(1+176/256))=  +5.24592e-001
data8 0x3fe0ddc2305b9884, 0x3cb2f753210410ff // log(1/frcpa(1+177/256))=  +5.27070e-001
data8 0x3fe0eb524bafc918, 0x3c88affd6682229e // log(1/frcpa(1+178/256))=  +5.28726e-001
data8 0x3fe0ffb54213a474, 0x3cadeefbab9af993 // log(1/frcpa(1+179/256))=  +5.31214e-001
data8 0x3fe114253da97d9c, 0x3cbaf1c2b8bc160a // log(1/frcpa(1+180/256))=  +5.33709e-001
data8 0x3fe128a24f1d9afc, 0x3cb9cf4df375e650 // log(1/frcpa(1+181/256))=  +5.36210e-001
data8 0x3fe1365252bf0864, 0x3c985a621d4be111 // log(1/frcpa(1+182/256))=  +5.37881e-001
data8 0x3fe14ae558b4a92c, 0x3ca104c4aa8977d1 // log(1/frcpa(1+183/256))=  +5.40393e-001
data8 0x3fe15f85a19c7658, 0x3cbadf26e540f375 // log(1/frcpa(1+184/256))=  +5.42910e-001
data8 0x3fe16d4d38c119f8, 0x3cb3aea11caec416 // log(1/frcpa(1+185/256))=  +5.44592e-001
data8 0x3fe18203c20dd130, 0x3cba82d1211d1d6d // log(1/frcpa(1+186/256))=  +5.47121e-001
data8 0x3fe196c7bc4b1f38, 0x3cb6267acc4f4f4a // log(1/frcpa(1+187/256))=  +5.49656e-001
data8 0x3fe1a4a738b7a33c, 0x3c858930213c987d // log(1/frcpa(1+188/256))=  +5.51349e-001
data8 0x3fe1b981c0c9653c, 0x3c9bc2a4a30f697b // log(1/frcpa(1+189/256))=  +5.53895e-001
data8 0x3fe1ce69e8bb1068, 0x3cb7ae6199cf2a00 // log(1/frcpa(1+190/256))=  +5.56447e-001
data8 0x3fe1dc619de06944, 0x3c6b50bb38388177 // log(1/frcpa(1+191/256))=  +5.58152e-001
data8 0x3fe1f160a2ad0da0, 0x3cbd05b2778a5e1d // log(1/frcpa(1+192/256))=  +5.60715e-001
data8 0x3fe2066d7740737c, 0x3cb32e828f9c6bd6 // log(1/frcpa(1+193/256))=  +5.63285e-001
data8 0x3fe2147dba47a390, 0x3cbd579851b8b672 // log(1/frcpa(1+194/256))=  +5.65001e-001
data8 0x3fe229a1bc5ebac0, 0x3cbb321be5237ce8 // log(1/frcpa(1+195/256))=  +5.67582e-001
data8 0x3fe237c1841a502c, 0x3cb3b56e0915ea64 // log(1/frcpa(1+196/256))=  +5.69306e-001
data8 0x3fe24cfce6f80d98, 0x3cb34a4d1a422919 // log(1/frcpa(1+197/256))=  +5.71898e-001
data8 0x3fe25b2c55cd5760, 0x3cb237401ea5015e // log(1/frcpa(1+198/256))=  +5.73630e-001
data8 0x3fe2707f4d5f7c40, 0x3c9d30f20acc8341 // log(1/frcpa(1+199/256))=  +5.76233e-001
data8 0x3fe285e0842ca380, 0x3cbc4d866d5f21c0 // log(1/frcpa(1+200/256))=  +5.78842e-001
data8 0x3fe294294708b770, 0x3cb85e14d5dc54fa // log(1/frcpa(1+201/256))=  +5.80586e-001
data8 0x3fe2a9a2670aff0c, 0x3c7e6f8f468bbf91 // log(1/frcpa(1+202/256))=  +5.83207e-001
data8 0x3fe2b7fb2c8d1cc0, 0x3c930ffcf63c8b65 // log(1/frcpa(1+203/256))=  +5.84959e-001
data8 0x3fe2c65a6395f5f4, 0x3ca0afe20b53d2d2 // log(1/frcpa(1+204/256))=  +5.86713e-001
data8 0x3fe2dbf557b0df40, 0x3cb646be1188fbc9 // log(1/frcpa(1+205/256))=  +5.89350e-001
data8 0x3fe2ea64c3f97654, 0x3c96516fa8df33b2 // log(1/frcpa(1+206/256))=  +5.91113e-001
data8 0x3fe3001823684d70, 0x3cb96d64e16d1360 // log(1/frcpa(1+207/256))=  +5.93762e-001
data8 0x3fe30e97e9a8b5cc, 0x3c98ef96bc97cca0 // log(1/frcpa(1+208/256))=  +5.95531e-001
data8 0x3fe32463ebdd34e8, 0x3caef1dc9a56c1bf // log(1/frcpa(1+209/256))=  +5.98192e-001
data8 0x3fe332f4314ad794, 0x3caa4f0ac5d5fa11 // log(1/frcpa(1+210/256))=  +5.99970e-001
data8 0x3fe348d90e7464cc, 0x3cbe7889f0516acd // log(1/frcpa(1+211/256))=  +6.02643e-001
data8 0x3fe35779f8c43d6c, 0x3ca96bbab7245411 // log(1/frcpa(1+212/256))=  +6.04428e-001
data8 0x3fe36621961a6a98, 0x3ca31f32262db9fb // log(1/frcpa(1+213/256))=  +6.06217e-001
data8 0x3fe37c299f3c3668, 0x3cb15c72c107ee29 // log(1/frcpa(1+214/256))=  +6.08907e-001
data8 0x3fe38ae2171976e4, 0x3cba42a2554b2dd4 // log(1/frcpa(1+215/256))=  +6.10704e-001
data8 0x3fe399a157a603e4, 0x3cb99c62286d8919 // log(1/frcpa(1+216/256))=  +6.12504e-001
data8 0x3fe3afccfe77b9d0, 0x3ca11048f96a43bd // log(1/frcpa(1+217/256))=  +6.15210e-001
data8 0x3fe3be9d503533b4, 0x3ca4022f47588c3e // log(1/frcpa(1+218/256))=  +6.17018e-001
data8 0x3fe3cd7480b4a8a0, 0x3cb4ba7afc2dc56a // log(1/frcpa(1+219/256))=  +6.18830e-001
data8 0x3fe3e3c43918f76c, 0x3c859673d064b8ba // log(1/frcpa(1+220/256))=  +6.21554e-001
data8 0x3fe3f2acb27ed6c4, 0x3cb55c6b452a16a8 // log(1/frcpa(1+221/256))=  +6.23373e-001
data8 0x3fe4019c2125ca90, 0x3cb8c367879c5a31 // log(1/frcpa(1+222/256))=  +6.25197e-001
data8 0x3fe4181061389720, 0x3cb2c17a79c5cc6c // log(1/frcpa(1+223/256))=  +6.27937e-001
data8 0x3fe42711518df544, 0x3ca5f38d47012fc5 // log(1/frcpa(1+224/256))=  +6.29769e-001
data8 0x3fe436194e12b6bc, 0x3cb9854d65a9b426 // log(1/frcpa(1+225/256))=  +6.31604e-001
data8 0x3fe445285d68ea68, 0x3ca3ff9b3a81cd81 // log(1/frcpa(1+226/256))=  +6.33442e-001
data8 0x3fe45bcc464c8938, 0x3cb0a2d8011a6c05 // log(1/frcpa(1+227/256))=  +6.36206e-001
data8 0x3fe46aed21f117fc, 0x3c8a2be41f8e9f3d // log(1/frcpa(1+228/256))=  +6.38053e-001
data8 0x3fe47a1527e8a2d0, 0x3cba4a83594fab09 // log(1/frcpa(1+229/256))=  +6.39903e-001
data8 0x3fe489445efffcc8, 0x3cbf306a23dcbcde // log(1/frcpa(1+230/256))=  +6.41756e-001
data8 0x3fe4a018bcb69834, 0x3ca46c9285029fd1 // log(1/frcpa(1+231/256))=  +6.44543e-001
data8 0x3fe4af5a0c9d65d4, 0x3cbbc1db897580e3 // log(1/frcpa(1+232/256))=  +6.46405e-001
data8 0x3fe4bea2a5bdbe84, 0x3cb84d880d7ef775 // log(1/frcpa(1+233/256))=  +6.48271e-001
data8 0x3fe4cdf28f10ac44, 0x3cb3ec4b7893ce1f // log(1/frcpa(1+234/256))=  +6.50140e-001
data8 0x3fe4dd49cf994058, 0x3c897224d59d3408 // log(1/frcpa(1+235/256))=  +6.52013e-001
data8 0x3fe4eca86e64a680, 0x3cbccf620f24f0cd // log(1/frcpa(1+236/256))=  +6.53889e-001
data8 0x3fe503c43cd8eb68, 0x3c3f872c65971084 // log(1/frcpa(1+237/256))=  +6.56710e-001
data8 0x3fe513356667fc54, 0x3cb9ca64cc3d52c8 // log(1/frcpa(1+238/256))=  +6.58595e-001
data8 0x3fe522ae0738a3d4, 0x3cbe708164c75968 // log(1/frcpa(1+239/256))=  +6.60483e-001
data8 0x3fe5322e26867854, 0x3cb9988ba4aea615 // log(1/frcpa(1+240/256))=  +6.62376e-001
data8 0x3fe541b5cb979808, 0x3ca1662e3a6b95f5 // log(1/frcpa(1+241/256))=  +6.64271e-001
data8 0x3fe55144fdbcbd60, 0x3cb3acd4ca45c1e0 // log(1/frcpa(1+242/256))=  +6.66171e-001
data8 0x3fe560dbc45153c4, 0x3cb4988947959fed // log(1/frcpa(1+243/256))=  +6.68074e-001
data8 0x3fe5707a26bb8c64, 0x3cb3017fe6607ba9 // log(1/frcpa(1+244/256))=  +6.69980e-001
data8 0x3fe587f60ed5b8fc, 0x3cbe7a3266366ed4 // log(1/frcpa(1+245/256))=  +6.72847e-001
data8 0x3fe597a7977c8f30, 0x3ca1e12b9959a90e // log(1/frcpa(1+246/256))=  +6.74763e-001
data8 0x3fe5a760d634bb88, 0x3cb7c365e53d9602 // log(1/frcpa(1+247/256))=  +6.76682e-001
data8 0x3fe5b721d295f10c, 0x3cb716c2551ccbf0 // log(1/frcpa(1+248/256))=  +6.78605e-001
data8 0x3fe5c6ea94431ef8, 0x3ca02b2ed0e28261 // log(1/frcpa(1+249/256))=  +6.80532e-001
data8 0x3fe5d6bb22ea86f4, 0x3caf43a8bbb2f974 // log(1/frcpa(1+250/256))=  +6.82462e-001
data8 0x3fe5e6938645d38c, 0x3cbcedc98821b333 // log(1/frcpa(1+251/256))=  +6.84397e-001
data8 0x3fe5f673c61a2ed0, 0x3caa385eef5f2789 // log(1/frcpa(1+252/256))=  +6.86335e-001
data8 0x3fe6065bea385924, 0x3cb11624f165c5b4 // log(1/frcpa(1+253/256))=  +6.88276e-001
data8 0x3fe6164bfa7cc068, 0x3cbad884f87073fa // log(1/frcpa(1+254/256))=  +6.90222e-001
data8 0x3fe62643fecf9740, 0x3cb78c51da12f4df // log(1/frcpa(1+255/256))=  +6.92171e-001


// Table 1 is 2^(index_1/128) where
// index_1 goes from 0 to 15
pow_tbl1:
data8 0x8000000000000000 , 0x00003FFF
data8 0x80B1ED4FD999AB6C , 0x00003FFF
data8 0x8164D1F3BC030773 , 0x00003FFF
data8 0x8218AF4373FC25EC , 0x00003FFF
data8 0x82CD8698AC2BA1D7 , 0x00003FFF
data8 0x8383594EEFB6EE37 , 0x00003FFF
data8 0x843A28C3ACDE4046 , 0x00003FFF
data8 0x84F1F656379C1A29 , 0x00003FFF
data8 0x85AAC367CC487B15 , 0x00003FFF
data8 0x8664915B923FBA04 , 0x00003FFF
data8 0x871F61969E8D1010 , 0x00003FFF
data8 0x87DB357FF698D792 , 0x00003FFF
data8 0x88980E8092DA8527 , 0x00003FFF
data8 0x8955EE03618E5FDD , 0x00003FFF
data8 0x8A14D575496EFD9A , 0x00003FFF
data8 0x8AD4C6452C728924 , 0x00003FFF


// Table 2 is 2^(index_1/8) where
// index_2 goes from 0 to 7
pow_tbl2:
data8 0x8000000000000000 , 0x00003FFF
data8 0x8B95C1E3EA8BD6E7 , 0x00003FFF
data8 0x9837F0518DB8A96F , 0x00003FFF
data8 0xA5FED6A9B15138EA , 0x00003FFF
data8 0xB504F333F9DE6484 , 0x00003FFF
data8 0xC5672A115506DADD , 0x00003FFF
data8 0xD744FCCAD69D6AF4 , 0x00003FFF
data8 0xEAC0C6E7DD24392F , 0x00003FFF

.global pow

.section .text
.proc  pow
.align 32

pow:

{ .mfi
          alloc         r32=ar.pfs,1,35,4,0 
          fms.s1 POW_Xm1 = f8,f1,f1   // Will be used for r1 if x>0
          mov           pow_GR_17ones  = 0x1FFFF
}
{ .mfi
          addl          pow_AD_P   = @ltoff(pow_table_P), gp
          fma.s1 POW_Xp1 = f8,f1,f1   // Will be used for r1 if x<0
          nop.i 999
;;
}


// Get exponent of x.  Will be used to calculate K.
{ .mfi
          getf.exp      pow_GR_signexp_X    = f8
          frcpa.s1      POW_B, p6   = f1,f8
          nop.i 999
}
{ .mfi
          ld8 pow_AD_P = [pow_AD_P]
          fma.s1        POW_NORM_X     = f8,f1,f0
          mov           pow_GR_FFF7    = 0xFFF7
}
;;



// Get significand of x.  Will be used to get index to fetch T, Tt.
// p13 = TRUE ==> X is unorm
// DOUBLE 0x10033  exponent limit at which y is an integer
// SINGLE 0x10016
{ .mfi
          getf.sig      pow_GR_sig_X        = f8
          fclass.m  p13,p0          = f8, 0x0b  // Test for x unorm
          addl pow_GR_10033                 = 0x10033, r0
}
{ .mfi
          mov           pow_GR_16ones   = 0xFFFF
          fma.s1        POW_NORM_Y     = f9,f1,f0
          nop.i 999
}
;;


// p14 = TRUE ==> X is ZERO
{ .mfi
          adds          pow_AD_Tt       = pow_Tt - pow_table_P,  pow_AD_P
          fclass.m  p14,p15          = f8, 0x07
          and           pow_GR_exp_X        = pow_GR_signexp_X, pow_GR_17ones
}
{ .mfi
          adds          pow_AD_Q       = pow_table_Q - pow_table_P,  pow_AD_P
          nop.f 999
          nop.i 999
}
;;

{ .mfi
          ldfe          POW_P5         = [pow_AD_P], 16
          fcmp.lt.s1 p8,p9 = f8, f0    // Test for x<0
          shl           pow_GR_offset       = pow_GR_sig_X, 1
}
{ .mib
          ldfe          POW_P4         = [pow_AD_Q], 16
          sub       pow_GR_true_exp_X       = pow_GR_exp_X, pow_GR_16ones
(p13)     br.cond.spnt POW_X_DENORM
}
;;


// Continue normal and denormal paths here
POW_COMMON:
// p11 = TRUE ==> Y is a NAN
{ .mfi
          ldfe          POW_P3         = [pow_AD_P], 16
          fclass.m  p11,p0         = f9, 0xc3
          shr.u     pow_GR_offset           = pow_GR_offset,56
}
{ .mfi
          ldfe          POW_P2         = [pow_AD_Q], 16
          nop.f 999
          mov pow_GR_y_zero = 0
}
;;



// Compute xsq to decide later if |x|=1
// p11 = TRUE ==> Y is a NaN
{ .mfi
          setf.sig POW_int_K                = pow_GR_true_exp_X
(p15)     fms.s1        POW_r          = POW_B, POW_NORM_X,f1
          shladd pow_AD_Tt = pow_GR_offset, 4, pow_AD_Tt
}
{ .mfi
          nop.m 999
(p8)      fnma.s1        POW_Xm1       = POW_Xp1,f1,f0
          nop.i 999
}
;;



// p12 = TRUE if Y is ZERO
{ .mfi
          ldfe          POW_P1         = [pow_AD_P], 16
          fclass.m      p12,p0              = f9, 0x07
          nop.i 999
}
{ .mfb
          ldfe          POW_P0         = [pow_AD_Q], 16
          fma.s1        POW_xsq = POW_NORM_X, POW_NORM_X, f0
(p11)     br.cond.spnt   POW_Y_NAN
}
;;


.pred.rel "mutex",p8,p9
// Get exponent of |x|-1 to use in comparison to 2^-8
{ .mmf
(p8)      getf.exp      pow_GR_signexp_Xm1  = POW_Xp1
(p9)      getf.exp      pow_GR_signexp_Xm1  = POW_Xm1
          fcvt.fx.s1   POW_int_Y            = POW_NORM_Y
}
;;


// p11 = TRUE ==> X is a NAN
{ .mfi
          ldfpd         POW_log2_hi, POW_log2_lo  = [pow_AD_Q], 16
          fclass.m      p11,p0              = f8, 0xc3
          nop.i 999
}
{ .mfi
          ldfpd  POW_T, POW_Tt              = [pow_AD_Tt], 16
          nop.f 999
(p12)     mov pow_GR_y_zero = 1
}
;;


// p14 = TRUE ==> X is zero
//    p15 = TRUE ==> X is zero AND Y is negative
//    p10 = TRUE ==> X is zero AND Y is >= zero 
//    p8  = TRUE ==> X is zero AND Y is zero
{ .mfi
          ldfe          POW_inv_log2_by_128 = [pow_AD_P], 16
(p14)     fcmp.lt.unc.s1 p15, p10           = f9,f0
(p14)     cmp.ne.unc p8,p0 = pow_GR_y_zero,r0
}
{ .mfi
          nop.m 999
          nop.f 999
          and       pow_GR_exp_Xm1          = pow_GR_signexp_Xm1, pow_GR_17ones
} 
;;


// Determine if we will use the |x| near 1 path (p6) or normal path (p7)
// p9  = TRUE ==> X is a NAN and Y is a zero
// p13 = TRUE ==> X is a NAN and Y is anything else
{ .mfi
          getf.exp  pow_GR_signexp_Y        = POW_NORM_Y 
(p11)     fclass.m.unc  p9,p13             = f9, 0x07
          cmp.lt p6,p7                      = pow_GR_exp_Xm1, pow_GR_FFF7
}
{ .mfi
          ldfpd  POW_Q2, POW_Q3             = [pow_AD_P], 16
          fma.s1        POW_rsq             = POW_r, POW_r,f0
          nop.i 999
;;
}

// If on the x near 1 path, assign r1 to r and r1*r1 to rsq
{ .mfi
          ldfpd  POW_Q0_half, POW_Q1             = [pow_AD_P], 16
(p6)      fma.s1    POW_r                 = POW_r1, f1, f0
          nop.i 999
}
{ .mfb
          nop.m 999
(p6)      fma.s1    POW_rsq                 = POW_r1, POW_r1, f0
(p8)      br.cond.spnt POW_X_0_Y_0   // Branch if x zero and y zero
;;
}


{ .mfi
          ldfpd   POW_Q4, POW_RSHF          = [pow_AD_P], 16
(p7)      fma.s1 POW_v6                     = POW_r,  POW_P5, POW_P4
          and pow_GR_exp_Y                   = pow_GR_signexp_Y, pow_GR_17ones
}
{ .mfb
          mov pow_GR_exp_2toM63             = 0xffc0  // Exponent of 2^-63
(p6)      fma.s1 POW_v6                     = POW_r1, POW_P5, POW_P4
(p9)      br.cond.spnt POW_X_NAN_Y_0
}
;;


{ .mfi
          setf.exp POW_2toM63 = pow_GR_exp_2toM63  // Form 2^-63 for test of q
(p7)      fma.s1 POW_v4                     = POW_P3, POW_r,  POW_P2 
          andcm pow_GR_sign_Y               = pow_GR_signexp_Y, pow_GR_17ones
}
{ .mfi
          nop.m 999
(p6)      fma.s1 POW_v4                     = POW_P3, POW_r1, POW_P2 
          nop.i 999
}
;;

{ .mfi
          nop.m 999
          fcvt.xf POW_K                     = POW_int_K
          nop.i 999
}
{ .mfb
          nop.m 999
(p13)     fma.d.s0 f8                       = f8,f1,f0
(p13)     br.ret.spnt  b0    // Exit if x nan, y anything but zero
}
;;
          
// p10 = TRUE ==> X is zero  AND Y is positive
//  p8  = TRUE ==> X is zero  AND Y is outside integer range (treat as even int)
//                   return +0
//  p9  = TRUE ==> X is zero  AND Y is within integer range (may not be integer) 
{ .mfi
(p10)     cmp.gt.unc p8,p9                  =  pow_GR_exp_Y, pow_GR_10033
(p6)      fmerge.s POW_delta                 = f0,f0
          nop.i 999
}
{ .mfb
          nop.m 999
(p6)      fma.s1 POW_G                       = f0,f0,f0
(p12)     br.cond.spnt POW_Y_0   // Branch if y=zero, x not zero or nan
}
;;

{ .mfi
          getf.sig pow_GR_sig_int_Y         = POW_int_Y
          fnma.s1 POW_twoV                   = POW_NORM_Y, POW_rsq,f0
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_U                      = POW_NORM_Y,POW_r,f0
          nop.i 999
}
;;

{ .mfi
          ldfe      POW_log2_by_128_lo      = [pow_AD_P], 16
(p6)      fma.s1 POW_v2                     = POW_P1, POW_r1, POW_P0 
          nop.i 999
}
{ .mfi
          ldfe          POW_log2_by_128_hi  = [pow_AD_Q], 16
(p7)      fma.s1 POW_v2                     = POW_P1, POW_r,  POW_P0 
          nop.i 999
}
;;


{ .mfi
          nop.m 999
          fcvt.xf   POW_float_int_Y               = POW_int_Y
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_v3                     = POW_v6, POW_rsq,  POW_v4 
          adds          pow_AD_tbl1       = pow_tbl1 - pow_Tt,  pow_AD_Q
}
;;

{ .mfi
          nop.m 999
(p7)      fma.s1 POW_delta                  = POW_K, POW_log2_lo, POW_Tt
          nop.i 999
}
{ .mfi
          nop.m 999
(p7)      fma.s1 POW_G                      = POW_K, POW_log2_hi, POW_T 
          adds pow_AD_tbl2                  = pow_tbl2 - pow_tbl1,  pow_AD_tbl1
}
;;


{ .mfi
          nop.m 999
          fms.s1 POW_e2                     = POW_NORM_Y, POW_r, POW_U
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_Z2                     = POW_twoV, POW_Q0_half, POW_U
          nop.i 999
}
;;

// p11 = TRUE ==> X is NEGATIVE but not inf
// p8  = TRUE ==> X is zero  AND Y is outside intger range (treat as even int)
//                return +0
{ .mfi
          nop.m 999
          fclass.m  p11,p0                  = f8, 0x1a
          nop.i 999
}
{ .mfb
          nop.m 999
(p8)      fma.d.s0 f8                      = f0,f0,f0
(p8)      br.ret.spnt b0
}
;;

{ .mfi 
          nop.m 999
          fma.s1 POW_Yrcub                 = POW_rsq, POW_U, f0
          nop.i 999
}
{ .mfi 
          nop.m 999
          fma.s1 POW_p                      = POW_rsq, POW_v3, POW_v2
          nop.i 999
}
;;


// p11 = TRUE ==> X is NEGATIVE but not inf
//    p12 = TRUE ==> X is NEGATIVE  AND  Y  already even int
//    p13 = TRUE ==> X is NEGATIVE  AND  Y possible int
{ .mfi
          nop.m 999
          fma.s1 POW_Z1                     = POW_NORM_Y, POW_G, f0
(p11)     cmp.gt.unc  p12,p13                = pow_GR_exp_Y, pow_GR_10033
}
{ .mfi
          nop.m 999
          fma.s1 POW_e3                     = POW_NORM_Y, POW_delta, f0
          nop.i 999
}
;;

// p9  = TRUE ==> X is zero  AND Y is within integer range (may not be integer)
//    p6 = TRUE ==>  X is zero  AND  Y is an integer (may be even or odd)
//    p7 = TRUE ==>  X is zero  AND  Y is NOT an integer, return +0
{ .mfi
          nop.m 999
(p9)      fcmp.eq.unc.s1 p6,p7             = POW_float_int_Y,  POW_NORM_Y
          nop.i 999
}
{ .mfi 
          nop.m 999
          fma.s1 POW_Gpr                    = POW_G, f1, POW_r
          nop.i 999
}
;;

// By adding RSHF (1.1000...*2^63) we put integer part in rightmost significand
{ .mfi
          nop.m 999
          fma.s1 POW_W2  = POW_Z2, POW_inv_log2_by_128, POW_RSHF
          nop.i 999
}
{ .mfi
          nop.m 999
          fms.s1 POW_UmZ2                   = POW_U, f1, POW_Z2
          nop.i 999
}
;;


// If x=0 and y>0, test y and flag denormal
// p6  = TRUE ==>  X is zero  AND  Y is an integer (may be even or odd)
//    p8 = TRUE ==>  X is zero  AND  Y is an odd  integer
//    p9 = TRUE ==>  X is zero  AND  Y is an even integer
{ .mfi
          nop.m 999
(p10)     fcmp.eq.s0 p15,p0 = f9,f0
(p6)      tbit.nz.unc  p8,p9                = pow_GR_sig_int_Y,0
}
{ .mfi
          nop.m 999
          fma.s1 POW_Z3                      = POW_p, POW_Yrcub, f0
          nop.i 999
}
;;

// By adding RSHF (1.1000...*2^63) we put integer part in rightmost significand
{ .mfi
          nop.m 999
          fms.s1 POW_e1                     = POW_NORM_Y, POW_G, POW_Z1
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_W1  = POW_Z1, POW_inv_log2_by_128, POW_RSHF
          nop.i 999
}
;;

{ .mfi
          nop.m 999
(p7)      fma.d.s0 f8  = f0,f0,f0  // Result +0 if x zero and y not integer
          nop.i 999
}
{ .mfb
          nop.m 999
          fma.s1 POW_Y_Gpr                  = POW_NORM_Y, POW_Gpr, f0
(p8)      br.ret.spnt b0        // Exit if x zero and y odd integer
}
;;

// By subtracting RSHF we get rounded integer POW_N2float
// p15 = TRUE ==> X_0_Y_NEG
{ .mfi
          nop.m 999
          fms.s1 POW_N2float  = POW_W2, f1, POW_RSHF
          nop.i 999
}
{ .mfb
          nop.m 999
          fma.s1 POW_UmZ2pV                 = POW_twoV,POW_Q0_half,POW_UmZ2
(p15)     br.cond.spnt POW_X_0_Y_NEG
}
;;



{ .mfi
          nop.m 999
          fma.s1 POW_Z3sq                   = POW_Z3, POW_Z3, f0
          nop.i 999
}
{ .mfb
          nop.m 999
          fma.s1 POW_v4                     = POW_Z3, POW_Q3, POW_Q2
(p7)      br.ret.spnt b0     // Exit if x zero and y not an integer
}
;;



// Extract rounded integer from rightmost significand of POW_W2
// By subtracting RSHF we get rounded integer POW_N1float
{ .mfi
          getf.sig pow_GR_int_W2             = POW_W2
          fms.s1 POW_N1float  = POW_W1, f1, POW_RSHF
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_v2                     = POW_Z3, POW_Q1, POW_Q0_half
          nop.i 999
}
;;


// p13 = TRUE ==> X is NEGATIVE  AND  Y possible int
//     p10 = TRUE ==> X is NEG and Y is an int
//     p12 = TRUE ==> X is NEG and Y is not an int
{ .mfi
          nop.m 999
(p13)     fcmp.eq.unc.s1 p10,p12             = POW_float_int_Y,  POW_NORM_Y
          mov pow_GR_xneg_yodd = 0
}
{ .mfb
          nop.m 999
(p9)      fma.d.s0 f8  = f0,f0,f0   // Result +0 if x zero and y even integer
(p9)      br.ret.spnt b0    // Exit if x zero and y even integer
}
;;


{ .mfi
          nop.m 999
          fnma.s1 POW_s2 = POW_N2float, POW_log2_by_128_hi, POW_Z2
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_e2                     = POW_e2,f1,POW_UmZ2pV
          nop.i 999
}
;;

// Extract rounded integer from rightmost significand of POW_W1
// Test if x inf
{ .mfi
          getf.sig pow_GR_int_W1             = POW_W1
          fclass.m p15,p0 = POW_NORM_X,  0x23
          nop.i 999
}
{ .mfb
          nop.m 999
          fnma.s1 POW_f2  = POW_N2float, POW_log2_by_128_lo, f1
(p12)     br.cond.spnt POW_X_NEG_Y_NONINT  // Branch if x neg, y not integer
}
;;

// p11 = TRUE ==> X is +1.0
// p12 = TRUE ==> X is NEGATIVE  AND Y is an odd integer
{ .mfi
          getf.exp pow_GR_signexp_Y_Gpr       = POW_Y_Gpr
          fcmp.eq.s1 p11,p0 = POW_NORM_X, f1
(p10)     tbit.nz.unc  p12,p0                = pow_GR_sig_int_Y,0
}
{ .mfi
          nop.m 999
          fma.s1 POW_v3                     = POW_Z3sq, POW_Q4, POW_v4
          nop.i 999
}
;;


{ .mfi
          add pow_GR_int_N                   = pow_GR_int_W1, pow_GR_int_W2
          fnma.s1 POW_f1  = POW_N1float, POW_log2_by_128_lo, f1
          nop.i 999
}
{ .mfb
          nop.m 999
          fnma.s1 POW_s1  = POW_N1float, POW_log2_by_128_hi, POW_Z1
(p15)     br.cond.spnt POW_X_INF
}
;;


// Test x and y and flag denormal
{ .mfi
          and pow_GR_index1                  = 0x0f, pow_GR_int_N
          fcmp.eq.s0 p15,p0 = f8,f9
          shr r2                             = pow_GR_int_N, 7
}
{ .mfi
          and pow_GR_exp_Y_Gpr               = pow_GR_signexp_Y_Gpr, pow_GR_17ones
(p11)     fma.d.s0 f8 = f1,f1,f0    // If x=1, result is +1
          and pow_GR_index2                  = 0x70, pow_GR_int_N
}
;;



{ .mfi
          shladd pow_AD_T1                   = pow_GR_index1, 4, pow_AD_tbl1
          fcmp.eq.s1 p7,p0 = POW_NORM_Y, f1  // Test for y=1.0
          sub pow_GR_true_exp_Y_Gpr          = pow_GR_exp_Y_Gpr, pow_GR_16ones
}
{ .mfi
          add pow_AD_T2                      = pow_AD_tbl2, pow_GR_index2
          fma.s1  POW_e12                     = POW_e1,f1,POW_e2
          addl pow_int_GR_M                  = 0xFFFF, r2
}
;;


{ .mfi
          ldfe POW_T1                        = [pow_AD_T1]
          nop.f 999
          andcm pow_GR_sign_Y_Gpr            = pow_GR_signexp_Y_Gpr, pow_GR_17ones
}
{ .mib
          ldfe POW_T2                        = [pow_AD_T2]
(p12)     mov pow_GR_xneg_yodd = 1
(p11)     br.ret.spnt b0        // Early exit if x=1.0, result is +1
}
;;


{ .mfb
          setf.exp POW_2M                    = pow_int_GR_M
          fma.s1 POW_q                       = POW_Z3sq, POW_v3, POW_v2
(p7)      br.ret.spnt b0        // Early exit if y=1.0, result is x
}
;;


// double: p8 TRUE ==> |Y(G + r)| >= 10
// single: p8 TRUE ==> |Y(G + r)| >= 7

// double
//     -2^10  -2^9             2^9   2^10
// -----+-----+----+ ... +-----+-----+-----
//  p8  |             p9             |  p8
//      |     |       p10      |     |  
// single
//     -2^7   -2^6             2^6   2^7
// -----+-----+----+ ... +-----+-----+-----
//  p8  |             p9             |  p8
//      |     |       p10      |     |


{ .mfi
          cmp.le p8,p9                       = 10, pow_GR_true_exp_Y_Gpr
          fma.s1 POW_s                       = POW_s1, f1, POW_s2
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_f12                     = POW_f1, POW_f2,f0
          nop.i 999
}
;;


{ .mfb
(p9)      cmp.le.unc p0,p10                  = 9, pow_GR_true_exp_Y_Gpr
          nop.f 999
(p8)      br.cond.spnt POW_OVER_UNDER_X_NOT_INF
}
;;



// Form signexp of constants to indicate overflow
{ .mmf
          mov         pow_GR_big_pos         = 0x103ff 
          mov         pow_GR_big_neg         = 0x303ff 
          fma.s1 POW_e123                    = POW_e12, f1, POW_e3
}
;;


// Form big positive and negative constants to test for possible overflow
{ .mmf
          setf.exp POW_big_pos               = pow_GR_big_pos
          setf.exp POW_big_neg               = pow_GR_big_neg
          fma.s1 POW_q                       = POW_Z3sq, POW_q, POW_Z3
}
;;


{ .mfi
          nop.m 999 
          fma.s1 POW_ssq                     = POW_s, POW_s, f0
          nop.i 999
}
{ .mfi
          nop.m 999 
          fma.s1 POW_v4                      = POW_s, POW_Q3, POW_Q2
          nop.i 999
}
;;

{ .mfi
          nop.m 999
          fma.s1 POW_v2                      = POW_s, POW_Q1, POW_Q0_half
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_1ps                     = f1,f1,POW_s
          nop.i 999
}
;;

// f123 = f12*(e123+1) = f12*e123+f12
{ .mfi
          nop.m 999
          fma.s1 POW_f123                    = POW_e123,POW_f12,POW_f12
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_T1T2                    = POW_T1, POW_T2, f0
          nop.i 999
}
;;

{ .mfi
          nop.m 999
          fma.s1 POW_v3                     = POW_ssq, POW_Q4, POW_v4
          cmp.ne p12,p13 = pow_GR_xneg_yodd, r0
}
;;

{ .mfi
          nop.m 999
          fma.s1 POW_v21ps                  = POW_ssq, POW_v2, POW_1ps
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_s4                     = POW_ssq, POW_ssq, f0
          nop.i 999
}
;;


{ .mfi
          nop.m 999
(p12)     fnma.s1 POW_A                    =  POW_2M, POW_T1T2, f0
          nop.i 999
}
{ .mfi
          nop.m 999
(p13)     fma.s1 POW_A                      =  POW_2M, POW_T1T2, f0
          cmp.eq p14,p11 = r0,r0   // Initialize p14 on, p11 off
}
;;

{ .mfi
          nop.m 999
          fmerge.s POW_abs_q = f0, POW_q    // Form |q| so can test its size
          nop.i 999
}
;;

{ .mfi
(p10)     cmp.eq p0,p14 = r0,r0    // Turn off p14 if no overflow
          fma.s1 POW_es                     = POW_s4,  POW_v3, POW_v21ps
          nop.i 999
}
{ .mfi
          nop.m 999
          fma.s1 POW_A                      = POW_A, POW_f123, f0
          nop.i 999
}
;;

{ .mfi
// Test for |q| < 2^-63.  If so then reverse last two steps of the result
// to avoid monotonicity problems for results near 1.0 in round up/down/zero.
// p11 will be set if need to reverse the order, p14 if not.
          nop.m 999
(p10)     fcmp.lt p11,p14 = POW_abs_q, POW_2toM63 // Test |q| <2^-63
          nop.i 999
}
;;

.pred.rel "mutex",p11,p14
{ .mfi
          nop.m 999
(p14)     fma.s1 POW_A                      = POW_A, POW_es, f0
          nop.i 999
}
{ .mfi
          nop.m 999
(p11)     fma.s1 POW_A                      = POW_A, POW_q, POW_A
          nop.i 999
}
;;

// Dummy op to set inexact if |q| < 2^-63
{ .mfi
          nop.m 999
(p11)     fma.d.s0 POW_tmp                  = POW_A, POW_q, POW_A
          nop.i 999
}
;;

{ .mfi
          nop.m 999
(p14)     fma.d.s0 f8                          = POW_A, POW_q, POW_A
          nop.i 999
}
{ .mfb
          nop.m 999
(p11)     fma.d.s0 f8                          = POW_A, POW_es, f0
(p10)     br.ret.sptk     b0
}
;;




// POSSIBLE_OVER_UNDER
// p6 = TRUE ==> Y_Gpr negative
// Result is already computed.  We just need to know if over/underflow occurred.

{ .mfb
        cmp.eq p0,p6                      = pow_GR_sign_Y_Gpr, r0
        nop.f 999
(p6)    br.cond.spnt POW_POSSIBLE_UNDER 
}
;;

// POSSIBLE_OVER
// We got an answer. 
// overflow is a possibility, not a certainty


// We define an overflow when the answer with
//    WRE set
//    user-defined rounding mode

// double
// Largest double is 7FE (biased double)
//                   7FE - 3FF + FFFF = 103FE
// Create + largest_double_plus_ulp
// Create - largest_double_plus_ulp
// Calculate answer with WRE set.

// single
// Largest single is FE (biased double)
//                   FE - 7F + FFFF = 1007E
// Create + largest_single_plus_ulp
// Create - largest_single_plus_ulp
// Calculate answer with WRE set.

// Cases when answer is ldn+1  are as follows:
//  ldn                   ldn+1
// --+----------|----------+------------
//              |
//    +inf          +inf      -inf
//                  RN         RN
//                             RZ


// Put in s2 (td set, wre set)
{ .mfi
        nop.m 999
        fsetc.s2 0x7F,0x42
        nop.i 999 
}
;;


{ .mfi
        nop.m 999
        fma.d.s2 POW_wre_urm_f8                    = POW_A, POW_q, POW_A
        nop.i 999
}
;;

// Return s2 to default
{ .mfi
        nop.m 999
        fsetc.s2 0x7F,0x40
        nop.i 999
}
;;


// p7 = TRUE ==> yes, we have an overflow
{ .mfi
        nop.m 999
        fcmp.ge.s1 p7, p8                    =  POW_wre_urm_f8, POW_big_pos
        nop.i 999
}
;;

{ .mfi
        nop.m 999
(p8)    fcmp.le.s1 p7, p0                    =  POW_wre_urm_f8, POW_big_neg
        nop.i 999
}
;;

{ .mbb
(p7)   mov pow_GR_tag                            = 24
(p7)   br.cond.spnt __libm_error_region     // Branch if overflow
       br.ret.sptk     b0                   // Exit if did not overflow
}
;;


POW_POSSIBLE_UNDER:
// We got an answer. input was < -2^9 but > -2^10 (double)
// We got an answer. input was < -2^6 but > -2^7  (float)
// underflow is a possibility, not a certainty

// We define an underflow when the answer with
//    ftz set
// is zero (tiny numbers become zero)
// Notice (from below) that if we have an unlimited exponent range,
// then there is an extra machine number E between the largest denormal and
// the smallest normal.
// So if with unbounded exponent we round to E or below, then we are
// tiny and underflow has occurred.
// But notice that you can be in a situation where we are tiny, namely
// rounded to E, but when the exponent is bounded we round to smallest
// normal. So the answer can be the smallest normal with underflow.
//                           E
// -----+--------------------+--------------------+-----
//      |                    |                    |
//   1.1...10 2^-3fff    1.1...11 2^-3fff    1.0...00 2^-3ffe
//   0.1...11 2^-3ffe                                   (biased, 1)
//    largest dn                               smallest normal


// Put in s2 (td set, ftz set)
{ .mfi
        nop.m 999
        fsetc.s2 0x7F,0x41
        nop.i 999 
}
;;

{ .mfi
        nop.m 999
        fma.d.s2 POW_ftz_urm_f8                    = POW_A, POW_q, POW_A
        nop.i 999
}
;;


// Return s2 to default
{ .mfi
        nop.m 999
        fsetc.s2 0x7F,0x40
        nop.i 999 
}
;;


// p7 = TRUE ==> yes, we have an underflow
{ .mfi
        nop.m 999
        fcmp.eq.s1 p7, p0                     =  POW_ftz_urm_f8, f0
        nop.i 999 
}
;;


{ .mbb
(p7)    mov pow_GR_tag                           = 25
(p7)    br.cond.spnt __libm_error_region      // Branch if underflow
        br.ret.sptk     b0                    // Exit if did not underflow
}
;;



POW_X_DENORM:
// Here if x unorm. Use the NORM_X for getf instructions, and the back
// to normal path
{ .mfi
        getf.exp      pow_GR_signexp_X    = POW_NORM_X
        nop.f 999
        nop.i 999
}
;;

{ .mfi
        getf.sig      pow_GR_sig_X        = POW_NORM_X
        nop.f 999
        nop.i 999
}
;;

{ .mfi
        and           pow_GR_exp_X        = pow_GR_signexp_X, pow_GR_17ones
        nop.f 999
        nop.i 999
}
;;

{ .mib
        sub       pow_GR_true_exp_X       = pow_GR_exp_X, pow_GR_16ones
        shl           pow_GR_offset       = pow_GR_sig_X, 1
        br.cond.sptk    POW_COMMON
}
;;


POW_X_0_Y_0:
// When X is +-0 and Y is +-0, IEEE returns 1.0 
// We call error support with this value 

{ .mfb
        mov pow_GR_tag                     = 26
        fma.d.s0 f8                        = f1,f1,f0
        br.cond.sptk __libm_error_region
}
;;


POW_Y_0:
// Here for y zero, x anything but zero and nan
// Set flag if x denormal
// Result is +1.0
{ .mfi
        nop.m 999
        fcmp.eq.s0 p6,p0 = f8,f0    // Sets flag if x denormal
        nop.i 999
}
{ .mfb
        nop.m 999
        fma.d.s0 f8 = f1,f1,f0
        br.ret.sptk b0
}
;;


POW_X_INF:
// Here when X is +-inf

// X +inf  Y +inf             +inf  
// X -inf  Y +inf             +inf 

// X +inf  Y >0               +inf    
// X -inf  Y >0, !odd integer +inf     <== (-inf)^0.5 = +inf !!
// X -inf  Y >0,  odd integer  -inf   

// X +inf  Y -inf             +0   
// X -inf  Y -inf             +0  

// X +inf  Y <0               +0      
// X -inf  Y <0, !odd integer +0     
// X -inf  Y <0, odd integer  -0    

// X + inf Y=+0                +1
// X + inf Y=-0                +1
// X - inf Y=+0                +1
// X - inf Y=-0                +1

// p13 == Y negative
// p14 == Y positive

// p6 == Y is a floating point number outside the integer.
//       Hence it is an integer and is even.
//       p13 == (Y negative) 
//          return +inf
//       p14 == (Y positive)
//          return +0



// p7 == Y is a floating point number within the integer range.
//      p9  == (int_Y = NORM_Y), Y is an integer, which may be odd or even.
//           p11 odd
//              p13 == (Y negative)    
//                 return (sign_of_x)inf
//              p14 == (Y positive) 
//                 return (sign_of_x)0
//           pxx even                
//              p13 == (Y negative) 
//                 return +inf     
//              p14 == (Y positive)
//                 return +0     

//      pxx == Y is not an integer
//           p13 == (Y negative) 
//                 return +inf
//           p14 == (Y positive)
//                 return +0
// 

// If x=inf, test y and flag denormal
{ .mfi
          nop.m 999
          fcmp.eq.s0 p10,p11 = f9,f0
          nop.i 999
}
;;

{ .mfi
          nop.m 999
          fcmp.lt p13,p14                    = POW_NORM_Y,f0 
          cmp.gt  p6,p7                      = pow_GR_exp_Y, pow_GR_10033
}
{ .mfi
          nop.m 999
          fclass.m p12,p0                    = f9, 0x23 //@inf
          nop.i 999
}
;;


{ .mfi
          nop.m 999
          fclass.m p15,p0                    = f9, 0x07	//@zero
          nop.i 999
}
;;

{ .mfb
          nop.m 999
(p15)     fmerge.s f8 = f1,f1      // Return +1.0 if x=inf, y=0
(p15)     br.ret.spnt b0           // Exit if x=inf, y=0
}
;;

        
{ .mfi
          nop.m 999
(p14)     frcpa.s1 f8,p10 = f1,f0  // If x=inf, y>0, assume result +inf
          nop.i 999
}
{ .mfb
          nop.m 999
(p13)     fma.s1 f8 = f0,f0,f0     // If x=inf, y<0, assume result +0.0
(p12)     br.ret.spnt b0           // Exit if x=inf, y=inf
}
;;

   
// Here if x=inf, and 0 < |y| < inf.  Need to correct results if y odd integer.
{ .mfi
          nop.m 999
(p7)      fcmp.eq.unc.s1 p9,p0 = POW_float_int_Y,  POW_NORM_Y // Is y integer?
          nop.i 999
}
;;

{ .mfi
          nop.m 999
          nop.f 999
(p9)      tbit.nz.unc p11,p0 = pow_GR_sig_int_Y,0  // Test for y odd integer
}
;;

{ .mfb
          nop.m 999
(p11)     fmerge.s f8 = POW_NORM_X,f8    // If y odd integer use sign of x
          br.ret.sptk b0                 // Exit for x=inf, 0 < |y| < inf
}
;;



POW_X_0_Y_NEG:
// When X is +-0 and Y is negative, IEEE returns 
// X     Y           answer
// +0    -odd int    +inf
// -0    -odd int    -inf

// +0    !-odd int   +inf
// -0    !-odd int   +inf


// p6 == Y is a floating point number outside the integer.
//       Hence it is an integer and is even.
//       return +inf

// p7 == Y is a floating point number within the integer range.
//      p9  == (int_Y = NORM_Y), Y is an integer, which may be odd or even.
//           p11 odd
//              return (sign_of_x)inf
//           p12 even
//              return +inf
//      p10 == Y is not an integer
//         return +inf
// 
// 

{ .mfi
          nop.m 999
          nop.f 999
          cmp.gt  p6,p7                      = pow_GR_exp_Y, pow_GR_10033
}
;;


{ .mfi
          mov pow_GR_tag                     = 27
(p7)      fcmp.eq.unc.s1 p9,p10              = POW_float_int_Y,  POW_NORM_Y
          nop.i 999
}
;;


{ .mfb
          nop.m 999
(p6)      frcpa.s0 f8,p13                       = f1, f0
(p6)      br.cond.sptk __libm_error_region
}
;;

{ .mfb
          nop.m 999
(p10)     frcpa.s0 f8,p13                       = f1, f0
(p10)     br.cond.sptk __libm_error_region
}
;;



{ .mib
          nop.m 999
(p9)      tbit.nz.unc p11,p12                = pow_GR_sig_int_Y,0
          nop.b 999
}
;;



{ .mfi
          nop.m 999
(p12)     frcpa.s0 f8,p13                      = f1,f0
          nop.i 999
}
;;

{ .mfb
          nop.m 999
(p11)     frcpa f8,p13                      = f1,f8 
          br.cond.sptk __libm_error_region
}
;;




POW_X_NEG_Y_NONINT:
// When X is negative and Y is a non-integer, IEEE
// returns a qnan indefinite.
// We call error support with this value 

{ .mfb
         mov pow_GR_tag                     = 28
         frcpa f8,p6                        = f0,f0
         br.cond.sptk __libm_error_region
}
;;




POW_X_NAN_Y_0:
// When X is a NAN and Y is zero, IEEE returns 1.
// We call error support with this value.

{ .mfi
         nop.m 0
         fma.d.s0 f10 = f8,f1,f0 
         nop.i 0
}
{ .mfb
         mov pow_GR_tag                     = 29
         fma.d.s0 f8 = f0,f0,f1 
         br.cond.sptk __libm_error_region
}
;;


POW_OVER_UNDER_X_NOT_INF:

// p8 is TRUE for overflow
// p9 is TRUE for underflow

// if y is infinity, we should not over/underflow


{ .mfi
          nop.m 999
          fcmp.eq.s1     p14, p13            = POW_xsq,f1
          cmp.eq p8,p9                       = pow_GR_sign_Y_Gpr, r0
}
;;

{ .mfi
          nop.m 999
(p14)     fclass.m.unc       p15, p0         = f9, 0x23
          nop.i 999
}
{ .mfi
          nop.m 999
(p13)     fclass.m.unc       p11,p0         = f9, 0x23
          nop.i 999
}
;;

// p15 = TRUE if |x|=1, y=inf, return +1
{ .mfb
          nop.m 999
(p15)     fma.d.s0          f8              = f1,f1,f0
(p15)     br.ret.spnt b0
}
;;

.pred.rel "mutex",p8,p9
{  .mfb
(p8)      setf.exp           f8              = pow_GR_17ones
(p9)      fmerge.s           f8              = f0,f0
(p11)     br.ret.sptk b0
}

{ .mfb
          nop.m 999
          nop.f 999
          br.cond.sptk POW_OVER_UNDER_ERROR
}
;;

POW_Y_NAN:

// Is x = +1 then result is +1, else result is quiet Y
{ .mfi
       nop.m 999
       fcmp.eq.s1         p10,p9               = POW_NORM_X, f1 
       nop.i 999
}
;;

{ .mfi
       nop.m 999
(p10)  fcmp.eq.s0 p6,p0 = f9,f1   // Set invalid, even if x=+1
       nop.i 999
}
;;

{ .mfi
       nop.m 999
(p10)  fma.d.s0 f8 = f1,f1,f0 
       nop.i 999
}
{ .mfb
       nop.m 999
(p9)   fma.d.s0 f8 = f9,f8,f0 
       br.ret.sptk b0             // Exit y=nan
}
;;


POW_OVER_UNDER_ERROR:

{ .mfi
          nop.m 999
          fmerge.s f10                      = POW_NORM_X,POW_NORM_X
          nop.i 999
}
{ .mfi
          sub   pow_GR_17ones_m1            = pow_GR_17ones, r0, 1
          nop.f 999
          mov pow_GR_one                    = 0x1
}
;;

// overflow
{ .mmb
(p8)     mov pow_GR_tag                     = 24
(p8)     setf.exp f11                       = pow_GR_17ones_m1
         nop.b 999
}
;;

        
// underflow
{ .mmi
(p9)    mov pow_GR_tag                     = 25
(p9)    setf.exp f11                       = pow_GR_one
        nop.i 999
}
;;


// p12 x is negative and y is an odd integer 


{ .mfi
        nop.m 999
        fma.d.s0 f8                           = f11, f11, f0
        nop.i 999
}
;;

{ .mfi
        nop.m 999
(p12)   fnma.d.s0 f8                          = f11, f11, f0
        nop.i 999
}
;;


.endp pow


// 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:

// Answer is inf for overflow and 0 for underflow.
.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] = POW_NORM_Y,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] = POW_NORM_X              // 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
        add   GR_Parameter_RESULT = 48,sp
        nop.m 0
        nop.i 0
};;

// (4)
{ .mmi
        ldfd  f8 = [GR_Parameter_RESULT]       // Get return result off stack
.restore
        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

.type   __libm_error_support#,@function
.global __libm_error_support#