diff options
Diffstat (limited to 'sysdeps/ia64/fpu/s_log1pf.S')
| -rw-r--r-- | sysdeps/ia64/fpu/s_log1pf.S | 2030 |
1 files changed, 1435 insertions, 595 deletions
diff --git a/sysdeps/ia64/fpu/s_log1pf.S b/sysdeps/ia64/fpu/s_log1pf.S index 77e79c39df..8aff9b895a 100644 --- a/sysdeps/ia64/fpu/s_log1pf.S +++ b/sysdeps/ia64/fpu/s_log1pf.S @@ -1,10 +1,10 @@ -.file "log1pf.s" +.file "log1pf.s" - -// Copyright (c) 2000 - 2003, Intel Corporation +// Copyright (C) 2000, 2001, Intel Corporation // All rights reserved. -// -// Contributed 2000 by the Intel Numerics Group, Intel Corporation +// +// Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story, +// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are @@ -20,770 +20,1610 @@ // * The name of Intel Corporation may not be used to endorse or promote // products derived from this software without specific prior written // permission. - -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// +// 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 +// 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 +// 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. -// +// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// // Intel Corporation is the author of this code, and requests that all -// problem reports or change requests be submitted to it directly at -// http://www.intel.com/software/products/opensource/libraries/num.htm. +// problem reports or change requests be submitted to it directly at +// http://developer.intel.com/opensource. // // History //============================================================== -// 02/02/00 Initial version -// 04/04/00 Unwind support added -// 08/15/00 Bundle added after call to __libm_error_support to properly +// 2/02/00 Initial version +// 4/04/00 Unwind support added +// 8/15/00 Bundle added after call to __libm_error_support to properly // set [the previously overwritten] GR_Parameter_RESULT. -// 06/29/01 Improved speed of all paths -// 05/20/02 Cleaned up namespace and sf0 syntax -// 10/02/02 Improved performance by basing on log algorithm -// 02/10/03 Reordered header: .section, .global, .proc, .align -// 04/18/03 Eliminate possible WAW dependency warning -// 12/16/03 Fixed parameter passing to/from error handling routine -// -// API -//============================================================== -// float log1pf(float) // -// log1p(x) = log(x+1) +// ********************************************************************* // -// Overview of operation -//============================================================== -// Background -// ---------- +// Function: log1pf(x) = ln(x+1), for single precision values // -// This algorithm is based on fact that -// log1p(x) = log(1+x) and -// log(a b) = log(a) + log(b). -// In our case we have 1+x = 2^N f, where 1 <= f < 2. -// So -// log(1+x) = log(2^N f) = log(2^N) + log(f) = n*log(2) + log(f) +// ********************************************************************* // -// To calculate log(f) we do following -// log(f) = log(f * frcpa(f) / frcpa(f)) = -// = log(f * frcpa(f)) + log(1/frcpa(f)) +// Accuracy: Very accurate for single precision values // -// According to definition of IA-64's frcpa instruction it's a -// floating point that approximates 1/f using a lookup on the -// top of 8 bits of the input number's + 1 significand with relative -// error < 2^(-8.886). So we have following +// ********************************************************************* // -// |(1/f - frcpa(f)) / (1/f))| = |1 - f*frcpa(f)| < 1/256 +// Resources Used: // -// and +// Floating-Point Registers: f8 (Input and Return Value) +// f9,f33-f55,f99 // -// log(f) = log(f * frcpa(f)) + log(1/frcpa(f)) = -// = log(1 + r) + T +// General Purpose Registers: +// r32-r53 +// r54-r57 (Used to pass arguments to error handling routine) // -// The first value can be computed by polynomial P(r) approximating -// log(1 + r) on |r| < 1/256 and the second is precomputed tabular -// value defined by top 8 bit of f. +// Predicate Registers: p6-p15 // -// Finally we have that log(1+x) ~ (N*log(2) + T) + P(r) +// ********************************************************************* // -// Note that if input argument is close to 0.0 (in our case it means -// that |x| < 1/256) we can use just polynomial approximation -// because 1+x = 2^0 * f = f = 1 + r and -// log(1+x) = log(1 + r) ~ P(r) +// IEEE Special Conditions: // +// Denormal fault raised on denormal inputs +// Overflow exceptions cannot occur +// Underflow exceptions raised when appropriate for log1pf +// (Error Handling Routine called for underflow) +// Inexact raised when appropriate by algorithm // -// Implementation -// -------------- +// log1pf(inf) = inf +// log1pf(-inf) = QNaN +// log1pf(+/-0) = +/-0 +// log1pf(-1) = -inf +// log1pf(SNaN) = QNaN +// log1pf(QNaN) = QNaN +// log1pf(EM_special Values) = QNaN // -// 1. |x| >= 2^(-8), and x > -1 -// InvX = frcpa(x+1) -// r = InvX*(x+1) - 1 -// P(r) = r*((1 - A2*4) + r^2*(A3 - A4*r)) = r*P2(r), -// A4,A3,A2 are created with setf instruction. -// We use Taylor series and so A4 = 1/4, A3 = 1/3, -// A2 = 1/2 rounded to double. +// ********************************************************************* // -// N = float(n) where n is true unbiased exponent of x +// Computation is based on the following kernel. // -// T is tabular value of log(1/frcpa(x)) calculated in quad precision -// and rounded to double. To load T we get bits from 55 to 62 of register -// format significand as index and calculate address -// ad_T = table_base_addr + 8 * index +// ker_log_64( in_FR : X, +// in_FR : E, +// in_FR : Em1, +// in_GR : Expo_Range, +// out_FR : Y_hi, +// out_FR : Y_lo, +// out_FR : Scale, +// out_PR : Safe ) +// +// Overview // -// L1 (log(2)) is calculated in quad precision and rounded to double; -// it's created with setf +// The method consists of three cases. // -// And final result = P2(r)*r + (T + N*L1) +// If |X+Em1| < 2^(-80) use case log1pf_small; +// elseif |X+Em1| < 2^(-7) use case log_near1; +// else use case log_regular; // +// Case log1pf_small: // -// 2. 2^(-40) <= |x| < 2^(-8) -// r = x -// P(r) = r*((1 - A2*4) + r^2*(A3 - A4*r)) = r*P2(r), -// A4,A3,A2 are the same as in case |x| >= 1/256 +// log( 1 + (X+Em1) ) can be approximated by (X+Em1). // -// And final result = P2(r)*r +// Case log_near1: // -// 3. 0 < |x| < 2^(-40) -// Although log1p(x) is basically x, we would like to preserve the inexactness -// nature as well as consistent behavior under different rounding modes. -// We can do this by computing the result as +// log( 1 + (X+Em1) ) can be approximated by a simple polynomial +// in W = X+Em1. This polynomial resembles the truncated Taylor +// series W - W^/2 + W^3/3 - ... +// +// Case log_regular: // -// log1p(x) = x - x*x +// Here we use a table lookup method. The basic idea is that in +// order to compute log(Arg) for an argument Arg in [1,2), we +// construct a value G such that G*Arg is close to 1 and that +// log(1/G) is obtainable easily from a table of values calculated +// beforehand. Thus // +// log(Arg) = log(1/G) + log(G*Arg) +// = log(1/G) + log(1 + (G*Arg - 1)) // -// Note: NaT, any NaNs, +/-INF, +/-0, negatives and unnormalized numbers are -// filtered and processed on special branches. +// Because |G*Arg - 1| is small, the second term on the right hand +// side can be approximated by a short polynomial. We elaborate +// this method in four steps. // - +// Step 0: Initialization // -// Special values -//============================================================== +// We need to calculate log( E + X ). Obtain N, S_hi, S_lo such that // -// log1p(-1) = -inf // Call error support +// E + X = 2^N * ( S_hi + S_lo ) exactly // -// log1p(+qnan) = +qnan -// log1p(-qnan) = -qnan -// log1p(+snan) = +qnan -// log1p(-snan) = -qnan +// where S_hi in [1,2) and S_lo is a correction to S_hi in the sense +// that |S_lo| <= ulp(S_hi). // -// log1p(x),x<-1= QNAN Indefinite // Call error support -// log1p(-inf) = QNAN Indefinite -// log1p(+inf) = +inf -// log1p(+/-0) = +/-0 +// Step 1: Argument Reduction // +// Based on S_hi, obtain G_1, G_2, G_3 from a table and calculate // -// Registers used -//============================================================== -// Floating Point registers used: -// f8, input -// f7 -> f15, f32 -> f36 +// G := G_1 * G_2 * G_3 +// r := (G * S_hi - 1) + G * S_lo +// +// These G_j's have the property that the product is exactly +// representable and that |r| < 2^(-12) as a result. +// +// Step 2: Approximation +// +// +// log(1 + r) is approximated by a short polynomial poly(r). +// +// Step 3: Reconstruction +// +// +// Finally, log( E + X ) is given by +// +// log( E + X ) = log( 2^N * (S_hi + S_lo) ) +// ~=~ N*log(2) + log(1/G) + log(1 + r) +// ~=~ N*log(2) + log(1/G) + poly(r). +// +// **** Algorithm **** +// +// Case log1pf_small: +// +// Although log(1 + (X+Em1)) is basically X+Em1, we would like to +// preserve the inexactness nature as well as consistent behavior +// under different rounding modes. Note that this case can only be +// taken if E is set to be 1.0. In this case, Em1 is zero, and that +// X can be very tiny and thus the final result can possibly underflow. +// Thus, we compare X against a threshold that is dependent on the +// input Expo_Range. If |X| is smaller than this threshold, we set +// SAFE to be FALSE. +// +// The result is returned as Y_hi, Y_lo, and in the case of SAFE +// is FALSE, an additional value Scale is also returned. +// +// W := X + Em1 +// Threshold := Threshold_Table( Expo_Range ) +// Tiny := Tiny_Table( Expo_Range ) +// +// If ( |W| > Threshold ) then +// Y_hi := W +// Y_lo := -W*W +// Else +// Y_hi := W +// Y_lo := -Tiny +// Scale := 2^(-100) +// Safe := FALSE +// EndIf +// +// +// One may think that Y_lo should be -W*W/2; however, it does not matter +// as Y_lo will be rounded off completely except for the correct effect in +// directed rounding. Clearly -W*W is simplier to compute. Moreover, +// because of the difference in exponent value, Y_hi + Y_lo or +// Y_hi + Scale*Y_lo is always inexact. +// +// Case log_near1: +// +// Here we compute a simple polynomial. To exploit parallelism, we split +// the polynomial into two portions. +// +// W := X + Em1 +// Wsq := W * W +// W4 := Wsq*Wsq +// W6 := W4*Wsq +// Y_hi := W + Wsq*(P_1 + W*(P_2 + W*(P_3 + W*P_4)) +// Y_lo := W6*(P_5 + W*(P_6 + W*(P_7 + W*P_8))) +// set lsb(Y_lo) to be 1 +// +// Case log_regular: +// +// We present the algorithm in four steps. +// +// Step 0. Initialization +// ---------------------- +// +// Z := X + E +// N := unbaised exponent of Z +// S_hi := 2^(-N) * Z +// S_lo := 2^(-N) * { (max(X,E)-Z) + min(X,E) } +// +// Note that S_lo is always 0 for the case E = 0. +// +// Step 1. Argument Reduction +// -------------------------- +// +// Let +// +// Z = 2^N * S_hi = 2^N * 1.d_1 d_2 d_3 ... d_63 +// +// We obtain G_1, G_2, G_3 by the following steps. +// +// +// Define X_0 := 1.d_1 d_2 ... d_14. This is extracted +// from S_hi. +// +// Define A_1 := 1.d_1 d_2 d_3 d_4. This is X_0 truncated +// to lsb = 2^(-4). +// +// Define index_1 := [ d_1 d_2 d_3 d_4 ]. +// +// Fetch Z_1 := (1/A_1) rounded UP in fixed point with +// fixed point lsb = 2^(-15). +// Z_1 looks like z_0.z_1 z_2 ... z_15 +// Note that the fetching is done using index_1. +// A_1 is actually not needed in the implementation +// and is used here only to explain how is the value +// Z_1 defined. +// +// Fetch G_1 := (1/A_1) truncated to 21 sig. bits. +// floating pt. Again, fetching is done using index_1. A_1 +// explains how G_1 is defined. +// +// Calculate X_1 := X_0 * Z_1 truncated to lsb = 2^(-14) +// = 1.0 0 0 0 d_5 ... d_14 +// This is accomplised by integer multiplication. +// It is proved that X_1 indeed always begin +// with 1.0000 in fixed point. +// +// +// Define A_2 := 1.0 0 0 0 d_5 d_6 d_7 d_8. This is X_1 +// truncated to lsb = 2^(-8). Similar to A_1, +// A_2 is not needed in actual implementation. It +// helps explain how some of the values are defined. +// +// Define index_2 := [ d_5 d_6 d_7 d_8 ]. +// +// Fetch Z_2 := (1/A_2) rounded UP in fixed point with +// fixed point lsb = 2^(-15). Fetch done using index_2. +// Z_2 looks like z_0.z_1 z_2 ... z_15 +// +// Fetch G_2 := (1/A_2) truncated to 21 sig. bits. +// floating pt. +// +// Calculate X_2 := X_1 * Z_2 truncated to lsb = 2^(-14) +// = 1.0 0 0 0 0 0 0 0 d_9 d_10 ... d_14 +// This is accomplised by integer multiplication. +// It is proved that X_2 indeed always begin +// with 1.00000000 in fixed point. +// +// +// Define A_3 := 1.0 0 0 0 0 0 0 0 d_9 d_10 d_11 d_12 d_13 1. +// This is 2^(-14) + X_2 truncated to lsb = 2^(-13). +// +// Define index_3 := [ d_9 d_10 d_11 d_12 d_13 ]. +// +// Fetch G_3 := (1/A_3) truncated to 21 sig. bits. +// floating pt. Fetch is done using index_3. +// +// Compute G := G_1 * G_2 * G_3. +// +// This is done exactly since each of G_j only has 21 sig. bits. // -// General registers used: -// r8 -> r11 -// r14 -> r22 +// Compute +// +// r := (G*S_hi - 1) + G*S_lo using 2 FMA operations. +// +// thus, r approximates G*(S_hi+S_lo) - 1 to within a couple of +// rounding errors. +// +// +// Step 2. Approximation +// --------------------- +// +// This step computes an approximation to log( 1 + r ) where r is the +// reduced argument just obtained. It is proved that |r| <= 1.9*2^(-13); +// thus log(1+r) can be approximated by a short polynomial: +// +// log(1+r) ~=~ poly = r + Q1 r^2 + ... + Q4 r^5 +// +// +// Step 3. Reconstruction +// ---------------------- +// +// This step computes the desired result of log(X+E): +// +// log(X+E) = log( 2^N * (S_hi + S_lo) ) +// = N*log(2) + log( S_hi + S_lo ) +// = N*log(2) + log(1/G) + +// log(1 + C*(S_hi+S_lo) - 1 ) +// +// log(2), log(1/G_j) are stored as pairs of (single,double) numbers: +// log2_hi, log2_lo, log1byGj_hi, log1byGj_lo. The high parts are +// single-precision numbers and the low parts are double precision +// numbers. These have the property that +// +// N*log2_hi + SUM ( log1byGj_hi ) +// +// is computable exactly in double-extended precision (64 sig. bits). +// Finally +// +// Y_hi := N*log2_hi + SUM ( log1byGj_hi ) +// Y_lo := poly_hi + [ poly_lo + +// ( SUM ( log1byGj_lo ) + N*log2_lo ) ] +// set lsb(Y_lo) to be 1 // -// Predicate registers used: -// p6 -> p12 -// Assembly macros -//============================================================== -GR_TAG = r8 -GR_ad_T = r9 -GR_Exp = r10 -GR_N = r11 +#include "libm_support.h" -GR_signexp_x = r14 -GR_exp_mask = r15 -GR_exp_bias = r16 -GR_05 = r17 -GR_A3 = r18 -GR_Sig = r19 -GR_Ind = r19 -GR_exp_x = r20 -GR_Ln2 = r21 -GR_025 = r22 +#ifdef _LIBC +.rodata +#else +.data +#endif +// P_7, P_6, P_5, P_4, P_3, P_2, and P_1 -GR_SAVE_B0 = r33 -GR_SAVE_PFS = r34 -GR_SAVE_GP = r35 -GR_SAVE_SP = r36 +.align 64 +Constants_P: +ASM_TYPE_DIRECTIVE(Constants_P,@object) +data4 0xEFD62B15,0xE3936754,0x00003FFB,0x00000000 +data4 0xA5E56381,0x8003B271,0x0000BFFC,0x00000000 +data4 0x73282DB0,0x9249248C,0x00003FFC,0x00000000 +data4 0x47305052,0xAAAAAA9F,0x0000BFFC,0x00000000 +data4 0xCCD17FC9,0xCCCCCCCC,0x00003FFC,0x00000000 +data4 0x00067ED5,0x80000000,0x0000BFFD,0x00000000 +data4 0xAAAAAAAA,0xAAAAAAAA,0x00003FFD,0x00000000 +data4 0xFFFFFFFE,0xFFFFFFFF,0x0000BFFD,0x00000000 +ASM_SIZE_DIRECTIVE(Constants_P) + +// log2_hi, log2_lo, Q_4, Q_3, Q_2, and Q_1 -GR_Parameter_X = r37 -GR_Parameter_Y = r38 -GR_Parameter_RESULT = r39 -GR_Parameter_TAG = r40 +.align 64 +Constants_Q: +ASM_TYPE_DIRECTIVE(Constants_Q,@object) +data4 0x00000000,0xB1721800,0x00003FFE,0x00000000 +data4 0x4361C4C6,0x82E30865,0x0000BFE2,0x00000000 +data4 0x328833CB,0xCCCCCAF2,0x00003FFC,0x00000000 +data4 0xA9D4BAFB,0x80000077,0x0000BFFD,0x00000000 +data4 0xAAABE3D2,0xAAAAAAAA,0x00003FFD,0x00000000 +data4 0xFFFFDAB7,0xFFFFFFFF,0x0000BFFD,0x00000000 +ASM_SIZE_DIRECTIVE(Constants_Q) + +// Z1 - 16 bit fixed, G1 and H1 - IEEE single + +.align 64 +Constants_Z_G_H_h1: +ASM_TYPE_DIRECTIVE(Constants_Z_G_H_h1,@object) +data4 0x00008000,0x3F800000,0x00000000,0x00000000,0x00000000,0x00000000 +data4 0x00007879,0x3F70F0F0,0x3D785196,0x00000000,0x617D741C,0x3DA163A6 +data4 0x000071C8,0x3F638E38,0x3DF13843,0x00000000,0xCBD3D5BB,0x3E2C55E6 +data4 0x00006BCB,0x3F579430,0x3E2FF9A0,0x00000000,0xD86EA5E7,0xBE3EB0BF +data4 0x00006667,0x3F4CCCC8,0x3E647FD6,0x00000000,0x86B12760,0x3E2E6A8C +data4 0x00006187,0x3F430C30,0x3E8B3AE7,0x00000000,0x5C0739BA,0x3E47574C +data4 0x00005D18,0x3F3A2E88,0x3EA30C68,0x00000000,0x13E8AF2F,0x3E20E30F +data4 0x0000590C,0x3F321640,0x3EB9CEC8,0x00000000,0xF2C630BD,0xBE42885B +data4 0x00005556,0x3F2AAAA8,0x3ECF9927,0x00000000,0x97E577C6,0x3E497F34 +data4 0x000051EC,0x3F23D708,0x3EE47FC5,0x00000000,0xA6B0A5AB,0x3E3E6A6E +data4 0x00004EC5,0x3F1D89D8,0x3EF8947D,0x00000000,0xD328D9BE,0xBDF43E3C +data4 0x00004BDB,0x3F17B420,0x3F05F3A1,0x00000000,0x0ADB090A,0x3E4094C3 +data4 0x00004925,0x3F124920,0x3F0F4303,0x00000000,0xFC1FE510,0xBE28FBB2 +data4 0x0000469F,0x3F0D3DC8,0x3F183EBF,0x00000000,0x10FDE3FA,0x3E3A7895 +data4 0x00004445,0x3F088888,0x3F20EC80,0x00000000,0x7CC8C98F,0x3E508CE5 +data4 0x00004211,0x3F042108,0x3F29516A,0x00000000,0xA223106C,0xBE534874 +ASM_SIZE_DIRECTIVE(Constants_Z_G_H_h1) + +// Z2 - 16 bit fixed, G2 and H2 - IEEE single +.align 64 +Constants_Z_G_H_h2: +ASM_TYPE_DIRECTIVE(Constants_Z_G_H_h2,@object) +data4 0x00008000,0x3F800000,0x00000000,0x00000000,0x00000000,0x00000000 +data4 0x00007F81,0x3F7F00F8,0x3B7F875D,0x00000000,0x22C42273,0x3DB5A116 +data4 0x00007F02,0x3F7E03F8,0x3BFF015B,0x00000000,0x21F86ED3,0x3DE620CF +data4 0x00007E85,0x3F7D08E0,0x3C3EE393,0x00000000,0x484F34ED,0xBDAFA07E +data4 0x00007E08,0x3F7C0FC0,0x3C7E0586,0x00000000,0x3860BCF6,0xBDFE07F0 +data4 0x00007D8D,0x3F7B1880,0x3C9E75D2,0x00000000,0xA78093D6,0x3DEA370F +data4 0x00007D12,0x3F7A2328,0x3CBDC97A,0x00000000,0x72A753D0,0x3DFF5791 +data4 0x00007C98,0x3F792FB0,0x3CDCFE47,0x00000000,0xA7EF896B,0x3DFEBE6C +data4 0x00007C20,0x3F783E08,0x3CFC15D0,0x00000000,0x409ECB43,0x3E0CF156 +data4 0x00007BA8,0x3F774E38,0x3D0D874D,0x00000000,0xFFEF71DF,0xBE0B6F97 +data4 0x00007B31,0x3F766038,0x3D1CF49B,0x00000000,0x5D59EEE8,0xBE080483 +data4 0x00007ABB,0x3F757400,0x3D2C531D,0x00000000,0xA9192A74,0x3E1F91E9 +data4 0x00007A45,0x3F748988,0x3D3BA322,0x00000000,0xBF72A8CD,0xBE139A06 +data4 0x000079D1,0x3F73A0D0,0x3D4AE46F,0x00000000,0xF8FBA6CF,0x3E1D9202 +data4 0x0000795D,0x3F72B9D0,0x3D5A1756,0x00000000,0xBA796223,0xBE1DCCC4 +data4 0x000078EB,0x3F71D488,0x3D693B9D,0x00000000,0xB6B7C239,0xBE049391 +ASM_SIZE_DIRECTIVE(Constants_Z_G_H_h2) + +// G3 and H3 - IEEE single and h3 -IEEE double +.align 64 +Constants_Z_G_H_h3: +ASM_TYPE_DIRECTIVE(Constants_Z_G_H_h3,@object) +data4 0x3F7FFC00,0x38800100,0x562224CD,0x3D355595 +data4 0x3F7FF400,0x39400480,0x06136FF6,0x3D8200A2 +data4 0x3F7FEC00,0x39A00640,0xE8DE9AF0,0x3DA4D68D +data4 0x3F7FE400,0x39E00C41,0xB10238DC,0xBD8B4291 +data4 0x3F7FDC00,0x3A100A21,0x3B1952CA,0xBD89CCB8 +data4 0x3F7FD400,0x3A300F22,0x1DC46826,0xBDB10707 +data4 0x3F7FCC08,0x3A4FF51C,0xF43307DB,0x3DB6FCB9 +data4 0x3F7FC408,0x3A6FFC1D,0x62DC7872,0xBD9B7C47 +data4 0x3F7FBC10,0x3A87F20B,0x3F89154A,0xBDC3725E +data4 0x3F7FB410,0x3A97F68B,0x62B9D392,0xBD93519D +data4 0x3F7FAC18,0x3AA7EB86,0x0F21BD9D,0x3DC18441 +data4 0x3F7FA420,0x3AB7E101,0x2245E0A6,0xBDA64B95 +data4 0x3F7F9C20,0x3AC7E701,0xAABB34B8,0x3DB4B0EC +data4 0x3F7F9428,0x3AD7DD7B,0x6DC40A7E,0x3D992337 +data4 0x3F7F8C30,0x3AE7D474,0x4F2083D3,0x3DC6E17B +data4 0x3F7F8438,0x3AF7CBED,0x811D4394,0x3DAE314B +data4 0x3F7F7C40,0x3B03E1F3,0xB08F2DB1,0xBDD46F21 +data4 0x3F7F7448,0x3B0BDE2F,0x6D34522B,0xBDDC30A4 +data4 0x3F7F6C50,0x3B13DAAA,0xB1F473DB,0x3DCB0070 +data4 0x3F7F6458,0x3B1BD766,0x6AD282FD,0xBDD65DDC +data4 0x3F7F5C68,0x3B23CC5C,0xF153761A,0xBDCDAB83 +data4 0x3F7F5470,0x3B2BC997,0x341D0F8F,0xBDDADA40 +data4 0x3F7F4C78,0x3B33C711,0xEBC394E8,0x3DCD1BD7 +data4 0x3F7F4488,0x3B3BBCC6,0x52E3E695,0xBDC3532B +data4 0x3F7F3C90,0x3B43BAC0,0xE846B3DE,0xBDA3961E +data4 0x3F7F34A0,0x3B4BB0F4,0x785778D4,0xBDDADF06 +data4 0x3F7F2CA8,0x3B53AF6D,0xE55CE212,0x3DCC3ED1 +data4 0x3F7F24B8,0x3B5BA620,0x9E382C15,0xBDBA3103 +data4 0x3F7F1CC8,0x3B639D12,0x5C5AF197,0x3D635A0B +data4 0x3F7F14D8,0x3B6B9444,0x71D34EFC,0xBDDCCB19 +data4 0x3F7F0CE0,0x3B7393BC,0x52CD7ADA,0x3DC74502 +data4 0x3F7F04F0,0x3B7B8B6D,0x7D7F2A42,0xBDB68F17 +ASM_SIZE_DIRECTIVE(Constants_Z_G_H_h3) + +// +// Exponent Thresholds and Tiny Thresholds +// for 8, 11, 15, and 17 bit exponents +// +// Expo_Range Value +// +// 0 (8 bits) 2^(-126) +// 1 (11 bits) 2^(-1022) +// 2 (15 bits) 2^(-16382) +// 3 (17 bits) 2^(-16382) +// +// Tiny_Table +// ---------- +// Expo_Range Value +// +// 0 (8 bits) 2^(-16382) +// 1 (11 bits) 2^(-16382) +// 2 (15 bits) 2^(-16382) +// 3 (17 bits) 2^(-16382) +// -FR_NormX = f7 -FR_RcpX = f9 -FR_r = f10 -FR_r2 = f11 -FR_r4 = f12 -FR_N = f13 -FR_Ln2 = f14 -FR_Xp1 = f15 +.align 64 +Constants_Threshold: +ASM_TYPE_DIRECTIVE(Constants_Threshold,@object) +data4 0x00000000,0x80000000,0x00003F81,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +data4 0x00000000,0x80000000,0x00003C01,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +data4 0x00000000,0x80000000,0x00000001,0x00000000 +ASM_SIZE_DIRECTIVE(Constants_Threshold) -FR_A4 = f33 -FR_A3 = f34 -FR_A2 = f35 +.align 64 +Constants_1_by_LN10: +ASM_TYPE_DIRECTIVE(Constants_1_by_LN10,@object) +data4 0x37287195,0xDE5BD8A9,0x00003FFD,0x00000000 +data4 0xACCF70C8,0xD56EAABE,0x00003FBD,0x00000000 +ASM_SIZE_DIRECTIVE(Constants_1_by_LN10) -FR_T = f36 -FR_NxLn2pT = f36 +FR_Input_X = f8 +FR_Neg_One = f9 +FR_E = f33 +FR_Em1 = f34 +FR_Y_hi = f34 +// Shared with Em1 +FR_Y_lo = f35 +FR_Scale = f36 +FR_X_Prime = f37 +FR_Z = f38 +FR_S_hi = f38 +// Shared with Z +FR_W = f39 +FR_G = f40 +FR_wsq = f40 +// Shared with G +FR_H = f41 +FR_w4 = f41 +// Shared with H +FR_h = f42 +FR_w6 = f42 +// Shared with h +FR_G_tmp = f43 +FR_poly_lo = f43 +// Shared with G_tmp +FR_P8 = f43 +// Shared with G_tmp +FR_H_tmp = f44 +FR_poly_hi = f44 + // Shared with H_tmp +FR_P7 = f44 +// Shared with H_tmp +FR_h_tmp = f45 +FR_rsq = f45 +// Shared with h_tmp +FR_P6 = f45 +// Shared with h_tmp +FR_abs_W = f46 +FR_r = f46 +// Shared with abs_W +FR_AA = f47 +FR_log2_hi = f47 +// Shared with AA +FR_BB = f48 +FR_log2_lo = f48 +// Shared with BB +FR_S_lo = f49 +FR_two_negN = f50 +FR_float_N = f51 +FR_Q4 = f52 +FR_dummy = f52 +// Shared with Q4 +FR_P4 = f52 +// Shared with Q4 +FR_Threshold = f52 +// Shared with Q4 +FR_Q3 = f53 +FR_P3 = f53 +// Shared with Q3 +FR_Tiny = f53 +// Shared with Q3 +FR_Q2 = f54 +FR_P2 = f54 +// Shared with Q2 +FR_1LN10_hi = f54 +// Shared with Q2 +FR_Q1 = f55 +FR_P1 = f55 +// Shared with Q1 +FR_1LN10_lo = f55 +// Shared with Q1 +FR_P5 = f98 +FR_SCALE = f98 +FR_Output_X_tmp = f99 +GR_Expo_Range = r32 +GR_Table_Base = r34 +GR_Table_Base1 = r35 +GR_Table_ptr = r36 +GR_Index2 = r37 +GR_signif = r38 +GR_X_0 = r39 +GR_X_1 = r40 +GR_X_2 = r41 +GR_Z_1 = r42 +GR_Z_2 = r43 +GR_N = r44 +GR_Bias = r45 +GR_M = r46 +GR_ScaleN = r47 +GR_Index3 = r48 +GR_Perturb = r49 +GR_Table_Scale = r50 -FR_Y = f1 -FR_X = f10 -FR_RESULT = f8 +GR_SAVE_PFS = r51 +GR_SAVE_B0 = r52 +GR_SAVE_GP = r53 +GR_Parameter_X = r54 +GR_Parameter_Y = r55 +GR_Parameter_RESULT = r56 + +GR_Parameter_TAG = r57 -// Data -//============================================================== -RODATA -.align 16 - -LOCAL_OBJECT_START(log_data) -// ln(1/frcpa(1+i/256)), i=0...255 -data8 0x3F60040155D5889E // 0 -data8 0x3F78121214586B54 // 1 -data8 0x3F841929F96832F0 // 2 -data8 0x3F8C317384C75F06 // 3 -data8 0x3F91A6B91AC73386 // 4 -data8 0x3F95BA9A5D9AC039 // 5 -data8 0x3F99D2A8074325F4 // 6 -data8 0x3F9D6B2725979802 // 7 -data8 0x3FA0C58FA19DFAAA // 8 -data8 0x3FA2954C78CBCE1B // 9 -data8 0x3FA4A94D2DA96C56 // 10 -data8 0x3FA67C94F2D4BB58 // 11 -data8 0x3FA85188B630F068 // 12 -data8 0x3FAA6B8ABE73AF4C // 13 -data8 0x3FAC441E06F72A9E // 14 -data8 0x3FAE1E6713606D07 // 15 -data8 0x3FAFFA6911AB9301 // 16 -data8 0x3FB0EC139C5DA601 // 17 -data8 0x3FB1DBD2643D190B // 18 -data8 0x3FB2CC7284FE5F1C // 19 -data8 0x3FB3BDF5A7D1EE64 // 20 -data8 0x3FB4B05D7AA012E0 // 21 -data8 0x3FB580DB7CEB5702 // 22 -data8 0x3FB674F089365A7A // 23 -data8 0x3FB769EF2C6B568D // 24 -data8 0x3FB85FD927506A48 // 25 -data8 0x3FB9335E5D594989 // 26 -data8 0x3FBA2B0220C8E5F5 // 27 -data8 0x3FBB0004AC1A86AC // 28 -data8 0x3FBBF968769FCA11 // 29 -data8 0x3FBCCFEDBFEE13A8 // 30 -data8 0x3FBDA727638446A2 // 31 -data8 0x3FBEA3257FE10F7A // 32 -data8 0x3FBF7BE9FEDBFDE6 // 33 -data8 0x3FC02AB352FF25F4 // 34 -data8 0x3FC097CE579D204D // 35 -data8 0x3FC1178E8227E47C // 36 -data8 0x3FC185747DBECF34 // 37 -data8 0x3FC1F3B925F25D41 // 38 -data8 0x3FC2625D1E6DDF57 // 39 -data8 0x3FC2D1610C86813A // 40 -data8 0x3FC340C59741142E // 41 -data8 0x3FC3B08B6757F2A9 // 42 -data8 0x3FC40DFB08378003 // 43 -data8 0x3FC47E74E8CA5F7C // 44 -data8 0x3FC4EF51F6466DE4 // 45 -data8 0x3FC56092E02BA516 // 46 -data8 0x3FC5D23857CD74D5 // 47 -data8 0x3FC6313A37335D76 // 48 -data8 0x3FC6A399DABBD383 // 49 -data8 0x3FC70337DD3CE41B // 50 -data8 0x3FC77654128F6127 // 51 -data8 0x3FC7E9D82A0B022D // 52 -data8 0x3FC84A6B759F512F // 53 -data8 0x3FC8AB47D5F5A310 // 54 -data8 0x3FC91FE49096581B // 55 -data8 0x3FC981634011AA75 // 56 -data8 0x3FC9F6C407089664 // 57 -data8 0x3FCA58E729348F43 // 58 -data8 0x3FCABB55C31693AD // 59 -data8 0x3FCB1E104919EFD0 // 60 -data8 0x3FCB94EE93E367CB // 61 -data8 0x3FCBF851C067555F // 62 -data8 0x3FCC5C0254BF23A6 // 63 -data8 0x3FCCC000C9DB3C52 // 64 -data8 0x3FCD244D99C85674 // 65 -data8 0x3FCD88E93FB2F450 // 66 -data8 0x3FCDEDD437EAEF01 // 67 -data8 0x3FCE530EFFE71012 // 68 -data8 0x3FCEB89A1648B971 // 69 -data8 0x3FCF1E75FADF9BDE // 70 -data8 0x3FCF84A32EAD7C35 // 71 -data8 0x3FCFEB2233EA07CD // 72 -data8 0x3FD028F9C7035C1C // 73 -data8 0x3FD05C8BE0D9635A // 74 -data8 0x3FD085EB8F8AE797 // 75 -data8 0x3FD0B9C8E32D1911 // 76 -data8 0x3FD0EDD060B78081 // 77 -data8 0x3FD122024CF0063F // 78 -data8 0x3FD14BE2927AECD4 // 79 -data8 0x3FD180618EF18ADF // 80 -data8 0x3FD1B50BBE2FC63B // 81 -data8 0x3FD1DF4CC7CF242D // 82 -data8 0x3FD214456D0EB8D4 // 83 -data8 0x3FD23EC5991EBA49 // 84 -data8 0x3FD2740D9F870AFB // 85 -data8 0x3FD29ECDABCDFA04 // 86 -data8 0x3FD2D46602ADCCEE // 87 -data8 0x3FD2FF66B04EA9D4 // 88 -data8 0x3FD335504B355A37 // 89 -data8 0x3FD360925EC44F5D // 90 -data8 0x3FD38BF1C3337E75 // 91 -data8 0x3FD3C25277333184 // 92 -data8 0x3FD3EDF463C1683E // 93 -data8 0x3FD419B423D5E8C7 // 94 -data8 0x3FD44591E0539F49 // 95 -data8 0x3FD47C9175B6F0AD // 96 -data8 0x3FD4A8B341552B09 // 97 -data8 0x3FD4D4F3908901A0 // 98 -data8 0x3FD501528DA1F968 // 99 -data8 0x3FD52DD06347D4F6 // 100 -data8 0x3FD55A6D3C7B8A8A // 101 -data8 0x3FD5925D2B112A59 // 102 -data8 0x3FD5BF406B543DB2 // 103 -data8 0x3FD5EC433D5C35AE // 104 -data8 0x3FD61965CDB02C1F // 105 -data8 0x3FD646A84935B2A2 // 106 -data8 0x3FD6740ADD31DE94 // 107 -data8 0x3FD6A18DB74A58C5 // 108 -data8 0x3FD6CF31058670EC // 109 -data8 0x3FD6F180E852F0BA // 110 -data8 0x3FD71F5D71B894F0 // 111 -data8 0x3FD74D5AEFD66D5C // 112 -data8 0x3FD77B79922BD37E // 113 -data8 0x3FD7A9B9889F19E2 // 114 -data8 0x3FD7D81B037EB6A6 // 115 -data8 0x3FD8069E33827231 // 116 -data8 0x3FD82996D3EF8BCB // 117 -data8 0x3FD85855776DCBFB // 118 -data8 0x3FD8873658327CCF // 119 -data8 0x3FD8AA75973AB8CF // 120 -data8 0x3FD8D992DC8824E5 // 121 -data8 0x3FD908D2EA7D9512 // 122 -data8 0x3FD92C59E79C0E56 // 123 -data8 0x3FD95BD750EE3ED3 // 124 -data8 0x3FD98B7811A3EE5B // 125 -data8 0x3FD9AF47F33D406C // 126 -data8 0x3FD9DF270C1914A8 // 127 -data8 0x3FDA0325ED14FDA4 // 128 -data8 0x3FDA33440224FA79 // 129 -data8 0x3FDA57725E80C383 // 130 -data8 0x3FDA87D0165DD199 // 131 -data8 0x3FDAAC2E6C03F896 // 132 -data8 0x3FDADCCC6FDF6A81 // 133 -data8 0x3FDB015B3EB1E790 // 134 -data8 0x3FDB323A3A635948 // 135 -data8 0x3FDB56FA04462909 // 136 -data8 0x3FDB881AA659BC93 // 137 -data8 0x3FDBAD0BEF3DB165 // 138 -data8 0x3FDBD21297781C2F // 139 -data8 0x3FDC039236F08819 // 140 -data8 0x3FDC28CB1E4D32FD // 141 -data8 0x3FDC4E19B84723C2 // 142 -data8 0x3FDC7FF9C74554C9 // 143 -data8 0x3FDCA57B64E9DB05 // 144 -data8 0x3FDCCB130A5CEBB0 // 145 -data8 0x3FDCF0C0D18F326F // 146 -data8 0x3FDD232075B5A201 // 147 -data8 0x3FDD490246DEFA6B // 148 -data8 0x3FDD6EFA918D25CD // 149 -data8 0x3FDD9509707AE52F // 150 -data8 0x3FDDBB2EFE92C554 // 151 -data8 0x3FDDEE2F3445E4AF // 152 -data8 0x3FDE148A1A2726CE // 153 -data8 0x3FDE3AFC0A49FF40 // 154 -data8 0x3FDE6185206D516E // 155 -data8 0x3FDE882578823D52 // 156 -data8 0x3FDEAEDD2EAC990C // 157 -data8 0x3FDED5AC5F436BE3 // 158 -data8 0x3FDEFC9326D16AB9 // 159 -data8 0x3FDF2391A2157600 // 160 -data8 0x3FDF4AA7EE03192D // 161 -data8 0x3FDF71D627C30BB0 // 162 -data8 0x3FDF991C6CB3B379 // 163 -data8 0x3FDFC07ADA69A910 // 164 -data8 0x3FDFE7F18EB03D3E // 165 -data8 0x3FE007C053C5002E // 166 -data8 0x3FE01B942198A5A1 // 167 -data8 0x3FE02F74400C64EB // 168 -data8 0x3FE04360BE7603AD // 169 -data8 0x3FE05759AC47FE34 // 170 -data8 0x3FE06B5F1911CF52 // 171 -data8 0x3FE078BF0533C568 // 172 -data8 0x3FE08CD9687E7B0E // 173 -data8 0x3FE0A10074CF9019 // 174 -data8 0x3FE0B5343A234477 // 175 -data8 0x3FE0C974C89431CE // 176 -data8 0x3FE0DDC2305B9886 // 177 -data8 0x3FE0EB524BAFC918 // 178 -data8 0x3FE0FFB54213A476 // 179 -data8 0x3FE114253DA97D9F // 180 -data8 0x3FE128A24F1D9AFF // 181 -data8 0x3FE1365252BF0865 // 182 -data8 0x3FE14AE558B4A92D // 183 -data8 0x3FE15F85A19C765B // 184 -data8 0x3FE16D4D38C119FA // 185 -data8 0x3FE18203C20DD133 // 186 -data8 0x3FE196C7BC4B1F3B // 187 -data8 0x3FE1A4A738B7A33C // 188 -data8 0x3FE1B981C0C9653D // 189 -data8 0x3FE1CE69E8BB106B // 190 -data8 0x3FE1DC619DE06944 // 191 -data8 0x3FE1F160A2AD0DA4 // 192 -data8 0x3FE2066D7740737E // 193 -data8 0x3FE2147DBA47A394 // 194 -data8 0x3FE229A1BC5EBAC3 // 195 -data8 0x3FE237C1841A502E // 196 -data8 0x3FE24CFCE6F80D9A // 197 -data8 0x3FE25B2C55CD5762 // 198 -data8 0x3FE2707F4D5F7C41 // 199 -data8 0x3FE285E0842CA384 // 200 -data8 0x3FE294294708B773 // 201 -data8 0x3FE2A9A2670AFF0C // 202 -data8 0x3FE2B7FB2C8D1CC1 // 203 -data8 0x3FE2C65A6395F5F5 // 204 -data8 0x3FE2DBF557B0DF43 // 205 -data8 0x3FE2EA64C3F97655 // 206 -data8 0x3FE3001823684D73 // 207 -data8 0x3FE30E97E9A8B5CD // 208 -data8 0x3FE32463EBDD34EA // 209 -data8 0x3FE332F4314AD796 // 210 -data8 0x3FE348D90E7464D0 // 211 -data8 0x3FE35779F8C43D6E // 212 -data8 0x3FE36621961A6A99 // 213 -data8 0x3FE37C299F3C366A // 214 -data8 0x3FE38AE2171976E7 // 215 -data8 0x3FE399A157A603E7 // 216 -data8 0x3FE3AFCCFE77B9D1 // 217 -data8 0x3FE3BE9D503533B5 // 218 -data8 0x3FE3CD7480B4A8A3 // 219 -data8 0x3FE3E3C43918F76C // 220 -data8 0x3FE3F2ACB27ED6C7 // 221 -data8 0x3FE4019C2125CA93 // 222 -data8 0x3FE4181061389722 // 223 -data8 0x3FE42711518DF545 // 224 -data8 0x3FE436194E12B6BF // 225 -data8 0x3FE445285D68EA69 // 226 -data8 0x3FE45BCC464C893A // 227 -data8 0x3FE46AED21F117FC // 228 -data8 0x3FE47A1527E8A2D3 // 229 -data8 0x3FE489445EFFFCCC // 230 -data8 0x3FE4A018BCB69835 // 231 -data8 0x3FE4AF5A0C9D65D7 // 232 -data8 0x3FE4BEA2A5BDBE87 // 233 -data8 0x3FE4CDF28F10AC46 // 234 -data8 0x3FE4DD49CF994058 // 235 -data8 0x3FE4ECA86E64A684 // 236 -data8 0x3FE503C43CD8EB68 // 237 -data8 0x3FE513356667FC57 // 238 -data8 0x3FE522AE0738A3D8 // 239 -data8 0x3FE5322E26867857 // 240 -data8 0x3FE541B5CB979809 // 241 -data8 0x3FE55144FDBCBD62 // 242 -data8 0x3FE560DBC45153C7 // 243 -data8 0x3FE5707A26BB8C66 // 244 -data8 0x3FE587F60ED5B900 // 245 -data8 0x3FE597A7977C8F31 // 246 -data8 0x3FE5A760D634BB8B // 247 -data8 0x3FE5B721D295F10F // 248 -data8 0x3FE5C6EA94431EF9 // 249 -data8 0x3FE5D6BB22EA86F6 // 250 -data8 0x3FE5E6938645D390 // 251 -data8 0x3FE5F673C61A2ED2 // 252 -data8 0x3FE6065BEA385926 // 253 -data8 0x3FE6164BFA7CC06B // 254 -data8 0x3FE62643FECF9743 // 255 -LOCAL_OBJECT_END(log_data) - - -// Code -//============================================================== .section .text -GLOBAL_IEEE754_ENTRY(log1pf) +.proc log1pf# +.global log1pf# +.align 64 +log1pf: +#ifdef _LIBC +.global __log1pf +__log1pf: +#endif + { .mfi - getf.exp GR_signexp_x = f8 // if x is unorm then must recompute - fadd.s1 FR_Xp1 = f8, f1 // Form 1+x - mov GR_05 = 0xfffe +alloc r32 = ar.pfs,0,22,4,0 +(p0) fsub.s1 FR_Neg_One = f0,f1 +(p0) cmp.eq.unc p7, p0 = r0, r0 } -{ .mlx - addl GR_ad_T = @ltoff(log_data),gp - movl GR_A3 = 0x3fd5555555555555 // double precision memory - // representation of A3 + +{ .mfi +(p0) cmp.ne.unc p14, p0 = r0, r0 +(p0) fnorm.s1 FR_X_Prime = FR_Input_X +(p0) cmp.eq.unc p15, p0 = r0, r0 ;; } -;; { .mfi - ld8 GR_ad_T = [GR_ad_T] - fclass.m p8,p0 = f8,0xb // Is x unorm? - mov GR_exp_mask = 0x1ffff + nop.m 999 +(p0) fclass.m.unc p6, p0 = FR_Input_X, 0x1E3 + nop.i 999 } +;; + { .mfi - mov GR_025 = 0xfffd // Exponent of 0.25 - fnorm.s1 FR_NormX = f8 // Normalize x - mov GR_exp_bias = 0xffff + nop.m 999 +(p0) fclass.nm.unc p10, p0 = FR_Input_X, 0x1FF + nop.i 999 } ;; { .mfi - setf.exp FR_A2 = GR_05 // create A2 = 0.5 - fclass.m p9,p0 = f8,0x1E1 // is x NaN, NaT or +Inf? - nop.i 0 + nop.m 999 +(p0) fcmp.eq.unc.s1 p9, p0 = FR_Input_X, f0 + nop.i 999 } -{ .mib - setf.d FR_A3 = GR_A3 // create A3 - nop.i 0 -(p8) br.cond.spnt log1p_unorm // Branch if x=unorm + +{ .mfi + nop.m 999 +(p0) fadd FR_Em1 = f0,f0 + nop.i 999 ;; } -;; -log1p_common: { .mfi - setf.exp FR_A4 = GR_025 // create A4 = 0.25 - frcpa.s1 FR_RcpX,p0 = f1,FR_Xp1 - nop.i 0 + nop.m 999 +(p0) fadd FR_E = f0,f1 + nop.i 999 ;; } -{ .mfb - nop.m 0 -(p9) fma.s.s0 f8 = f8,f1,f0 // set V-flag -(p9) br.ret.spnt b0 // exit for NaN, NaT and +Inf + +{ .mfi + nop.m 999 +(p0) fcmp.eq.unc.s1 p8, p0 = FR_Input_X, FR_Neg_One + nop.i 999 } -;; { .mfi - getf.exp GR_Exp = FR_Xp1 // signexp of x+1 - fclass.m p10,p0 = FR_Xp1,0x3A // is 1+x < 0? - and GR_exp_x = GR_exp_mask, GR_signexp_x // biased exponent of x + nop.m 999 +(p0) fcmp.lt.unc.s1 p13, p0 = FR_Input_X, FR_Neg_One + nop.i 999 +} + + +L(LOG_BEGIN): + +{ .mfi + nop.m 999 +(p0) fadd.s1 FR_Z = FR_X_Prime, FR_E + nop.i 999 } + { .mlx - nop.m 0 - movl GR_Ln2 = 0x3FE62E42FEFA39EF // double precision memory - // representation of log(2) + nop.m 999 +(p0) movl GR_Table_Scale = 0x0000000000000018 ;; +} + +{ .mmi + nop.m 999 +// +// Create E = 1 and Em1 = 0 +// Check for X == 0, meaning log(1+0) +// Check for X < -1, meaning log(negative) +// Check for X == -1, meaning log(0) +// Normalize x +// Identify NatVals, NaNs, Infs. +// Identify EM unsupporteds. +// Identify Negative values - us S1 so as +// not to raise denormal operand exception +// Set p15 to true for log1pf +// Set p14 to false for log1pf +// Set p7 true for log and log1pf +// +(p0) addl GR_Table_Base = @ltoff(Constants_Z_G_H_h1#),gp + nop.i 999 } -;; { .mfi - getf.sig GR_Sig = FR_Xp1 // get significand to calculate index - // for T if |x| >= 2^-8 - fcmp.eq.s1 p12,p0 = f8,f0 // is x equal to 0? - sub GR_exp_x = GR_exp_x, GR_exp_bias // true exponent of x + nop.m 999 +(p0) fmax.s1 FR_AA = FR_X_Prime, FR_E + nop.i 999 ;; } -;; { .mfi - sub GR_N = GR_Exp,GR_exp_bias // true exponent of x+1 - fcmp.eq.s1 p11,p0 = FR_Xp1,f0 // is x = -1? - cmp.gt p6,p7 = -8, GR_exp_x // Is |x| < 2^-8 + ld8 GR_Table_Base = [GR_Table_Base] +(p0) fmin.s1 FR_BB = FR_X_Prime, FR_E + nop.i 999 } + { .mfb - nop.m 0 - nop.f 0 -(p10) br.cond.spnt log1p_lt_minus_1 // jump if x < -1 + nop.m 999 +(p0) fadd.s1 FR_W = FR_X_Prime, FR_Em1 +// +// Begin load of constants base +// FR_Z = Z = |x| + E +// FR_W = W = |x| + Em1 +// AA = fmax(|x|,E) +// BB = fmin(|x|,E) +// +(p6) br.cond.spnt L(LOG_64_special) ;; +} + +{ .mib + nop.m 999 + nop.i 999 +(p10) br.cond.spnt L(LOG_64_unsupported) ;; +} + +{ .mib + nop.m 999 + nop.i 999 +(p13) br.cond.spnt L(LOG_64_negative) ;; +} + +{ .mib +(p0) getf.sig GR_signif = FR_Z + nop.i 999 +(p9) br.cond.spnt L(LOG_64_one) ;; +} + +{ .mib + nop.m 999 + nop.i 999 +(p8) br.cond.spnt L(LOG_64_zero) ;; } -;; -// p6 is true if |x| < 1/256 -// p7 is true if |x| >= 1/256 -.pred.rel "mutex",p6,p7 { .mfi - nop.m 0 -(p6) fms.s1 FR_r = f8,f1,f0 // range reduction for |x|<1/256 -(p6) cmp.gt.unc p10,p0 = -40, GR_exp_x // Is |x| < 2^-40 +(p0) getf.exp GR_N = FR_Z +// +// Raise possible denormal operand exception +// Create Bias +// +// This function computes ln( x + e ) +// Input FR 1: FR_X = FR_Input_X +// Input FR 2: FR_E = FR_E +// Input FR 3: FR_Em1 = FR_Em1 +// Input GR 1: GR_Expo_Range = GR_Expo_Range = 1 +// Output FR 4: FR_Y_hi +// Output FR 5: FR_Y_lo +// Output FR 6: FR_Scale +// Output PR 7: PR_Safe +// +(p0) fsub.s1 FR_S_lo = FR_AA, FR_Z +// +// signif = getf.sig(Z) +// abs_W = fabs(w) +// +(p0) extr.u GR_Table_ptr = GR_signif, 59, 4 ;; } -{ .mfb -(p7) setf.sig FR_N = GR_N // copy unbiased exponent of x to the - // significand field of FR_N -(p7) fms.s1 FR_r = FR_RcpX,FR_Xp1,f1 // range reduction for |x|>=1/256 -(p12) br.ret.spnt b0 // exit for x=0, return x + +{ .mfi + nop.m 999 +(p0) fmerge.se FR_S_hi = f1,FR_Z +(p0) extr.u GR_X_0 = GR_signif, 49, 15 +} + +{ .mmi + nop.m 999 +(p0) addl GR_Table_Base1 = @ltoff(Constants_Z_G_H_h2#),gp + nop.i 999 } ;; +{ .mlx + ld8 GR_Table_Base1 = [GR_Table_Base1] +(p0) movl GR_Bias = 0x000000000000FFFF ;; +} + +{ .mfi + nop.m 999 +(p0) fabs FR_abs_W = FR_W +(p0) pmpyshr2.u GR_Table_ptr = GR_Table_ptr,GR_Table_Scale,0 +} + +{ .mfi + nop.m 999 +// +// Branch out for special input values +// +(p0) fcmp.lt.unc.s0 p8, p0 = FR_Input_X, f0 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +// +// X_0 = extr.u(signif,49,15) +// Index1 = extr.u(signif,59,4) +// +(p0) fadd.s1 FR_S_lo = FR_S_lo, FR_BB + nop.i 999 ;; +} + +{ .mii + nop.m 999 + nop.i 999 ;; +// +// Offset_to_Z1 = 24 * Index1 +// For performance, don't use result +// for 3 or 4 cycles. +// +(p0) add GR_Table_ptr = GR_Table_ptr, GR_Table_Base ;; +} +// +// Add Base to Offset for Z1 +// Create Bias + +{ .mmi +(p0) ld4 GR_Z_1 = [GR_Table_ptr],4 ;; +(p0) ldfs FR_G = [GR_Table_ptr],4 + nop.i 999 ;; +} + +{ .mmi +(p0) ldfs FR_H = [GR_Table_ptr],8 ;; +(p0) ldfd FR_h = [GR_Table_ptr],0 +(p0) pmpyshr2.u GR_X_1 = GR_X_0,GR_Z_1,15 +} +// +// Load Z_1 +// Get Base of Table2 +// + +{ .mfi +(p0) getf.exp GR_M = FR_abs_W + nop.f 999 + nop.i 999 ;; +} + +{ .mii + nop.m 999 + nop.i 999 ;; +// +// M = getf.exp(abs_W) +// S_lo = AA - Z +// X_1 = pmpyshr2(X_0,Z_1,15) +// +(p0) sub GR_M = GR_M, GR_Bias ;; +} +// +// M = M - Bias +// Load G1 +// N = getf.exp(Z) +// + +{ .mii +(p0) cmp.gt.unc p11, p0 = -80, GR_M +(p0) cmp.gt.unc p12, p0 = -7, GR_M ;; +(p0) extr.u GR_Index2 = GR_X_1, 6, 4 ;; +} + { .mib - setf.d FR_Ln2 = GR_Ln2 // create log(2) -(p7) extr.u GR_Ind = GR_Sig,55,8 // get bits from 55 to 62 as index -(p11) br.cond.spnt log1p_eq_minus_1 // jump if x = -1 + nop.m 999 +// +// if -80 > M, set p11 +// Index2 = extr.u(X_1,6,4) +// if -7 > M, set p12 +// Load H1 +// +(p0) pmpyshr2.u GR_Index2 = GR_Index2,GR_Table_Scale,0 +(p11) br.cond.spnt L(log1pf_small) ;; } -;; -{ .mmf -(p7) shladd GR_ad_T = GR_Ind,3,GR_ad_T // address of T - nop.m 0 -(p10) fnma.s.s0 f8 = f8,f8,f8 // If |x| very small, result=x-x*x +{ .mib + nop.m 999 + nop.i 999 +(p12) br.cond.spnt L(log1pf_near) ;; } -;; + +{ .mii +(p0) sub GR_N = GR_N, GR_Bias +// +// poly_lo = r * poly_lo +// +(p0) add GR_Perturb = 0x1, r0 ;; +(p0) sub GR_ScaleN = GR_Bias, GR_N +} + +{ .mii +(p0) setf.sig FR_float_N = GR_N + nop.i 999 ;; +// +// Prepare Index2 - pmpyshr2.u(X_1,Z_2,15) +// Load h1 +// S_lo = S_lo + BB +// Branch for -80 > M +// +(p0) add GR_Index2 = GR_Index2, GR_Table_Base1 +} + +{ .mmi +(p0) setf.exp FR_two_negN = GR_ScaleN + nop.m 999 +(p0) addl GR_Table_Base = @ltoff(Constants_Z_G_H_h3#),gp +};; + +// +// Index2 points to Z2 +// Branch for -7 > M +// { .mmb -(p7) ldfd FR_T = [GR_ad_T] - nop.m 0 -(p10) br.ret.spnt b0 // Exit if |x| < 2^-40 +(p0) ld4 GR_Z_2 = [GR_Index2],4 + ld8 GR_Table_Base = [GR_Table_Base] + nop.b 999 ;; } -;; +(p0) nop.i 999 +// +// Load Z_2 +// N = N - Bias +// Tablebase points to Table3 +// + +{ .mmi +(p0) ldfs FR_G_tmp = [GR_Index2],4 ;; +// +// Load G_2 +// pmpyshr2 X_2= (X_1,Z_2,15) +// float_N = setf.sig(N) +// ScaleN = Bias - N +// +(p0) ldfs FR_H_tmp = [GR_Index2],8 + nop.i 999 ;; +} +// +// Load H_2 +// two_negN = setf.exp(scaleN) +// G = G_1 * G_2 +// { .mfi - nop.m 0 - fma.s1 FR_r2 = FR_r,FR_r,f0 // r^2 - nop.i 0 +(p0) ldfd FR_h_tmp = [GR_Index2],0 + nop.f 999 +(p0) pmpyshr2.u GR_X_2 = GR_X_1,GR_Z_2,15 ;; } + +{ .mii + nop.m 999 +(p0) extr.u GR_Index3 = GR_X_2, 1, 5 ;; +// +// Load h_2 +// H = H_1 + H_2 +// h = h_1 + h_2 +// Index3 = extr.u(X_2,1,5) +// +(p0) shladd GR_Index3 = GR_Index3,4,GR_Table_Base +} + +{ .mmi + nop.m 999 + nop.m 999 +// +// float_N = fcvt.xf(float_N) +// load G3 +// +(p0) addl GR_Table_Base = @ltoff(Constants_Q#),gp ;; +} + { .mfi - nop.m 0 - fnma.s1 FR_A2 = FR_A2,FR_r,f1 // 1.0 - A2*r - nop.i 0 +ld8 GR_Table_Base = [GR_Table_Base] +nop.f 999 +nop.i 999 +} ;; + +{ .mfi +(p0) ldfe FR_log2_hi = [GR_Table_Base],16 +(p0) fmpy.s1 FR_S_lo = FR_S_lo, FR_two_negN + nop.i 999 ;; +} + +{ .mmf + nop.m 999 +// +// G = G3 * G +// Load h3 +// Load log2_hi +// H = H + H3 +// +(p0) ldfe FR_log2_lo = [GR_Table_Base],16 +(p0) fmpy.s1 FR_G = FR_G, FR_G_tmp ;; +} + +{ .mmf +(p0) ldfs FR_G_tmp = [GR_Index3],4 +// +// h = h + h3 +// r = G * S_hi + 1 +// Load log2_lo +// +(p0) ldfe FR_Q4 = [GR_Table_Base],16 +(p0) fadd.s1 FR_h = FR_h, FR_h_tmp ;; } -;; { .mfi - nop.m 0 - fnma.s1 FR_A3 = FR_A4,FR_r,FR_A3 // A3 - A4*r - nop.i 0 +(p0) ldfe FR_Q3 = [GR_Table_Base],16 +(p0) fadd.s1 FR_H = FR_H, FR_H_tmp + nop.i 999 ;; +} + +{ .mmf +(p0) ldfs FR_H_tmp = [GR_Index3],4 +(p0) ldfe FR_Q2 = [GR_Table_Base],16 +// +// Comput Index for Table3 +// S_lo = S_lo * two_negN +// +(p0) fcvt.xf FR_float_N = FR_float_N ;; +} +// +// If S_lo == 0, set p8 false +// Load H3 +// Load ptr to table of polynomial coeff. +// + +{ .mmf +(p0) ldfd FR_h_tmp = [GR_Index3],0 +(p0) ldfe FR_Q1 = [GR_Table_Base],0 +(p0) fcmp.eq.unc.s1 p0, p8 = FR_S_lo, f0 ;; } -;; { .mfi - nop.m 0 -(p7) fcvt.xf FR_N = FR_N - nop.i 0 + nop.m 999 +(p0) fmpy.s1 FR_G = FR_G, FR_G_tmp + nop.i 999 ;; } -;; { .mfi - nop.m 0 - // (A3*r+A2)*r^2+r - fma.s1 FR_A2 = FR_A3,FR_r2,FR_A2 // (A4*r+A3)*r^2+(A2*r+1) - nop.i 0 + nop.m 999 +(p0) fadd.s1 FR_H = FR_H, FR_H_tmp + nop.i 999 ;; } -;; { .mfi - nop.m 0 - // N*Ln2hi+T -(p7) fma.s1 FR_NxLn2pT = FR_N,FR_Ln2,FR_T - nop.i 0 + nop.m 999 +(p0) fms.s1 FR_r = FR_G, FR_S_hi, f1 + nop.i 999 +} + +{ .mfi + nop.m 999 +(p0) fadd.s1 FR_h = FR_h, FR_h_tmp + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_hi = FR_float_N, FR_log2_hi, FR_H + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +// +// Load Q4 +// Load Q3 +// Load Q2 +// Load Q1 +// +(p8) fma.s1 FR_r = FR_G, FR_S_lo, FR_r + nop.i 999 +} + +{ .mfi + nop.m 999 +// +// poly_lo = r * Q4 + Q3 +// rsq = r* r +// +(p0) fma.s1 FR_h = FR_float_N, FR_log2_lo, FR_h + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +// +// If (S_lo!=0) r = s_lo * G + r +// +(p0) fma.s1 FR_poly_lo = FR_r, FR_Q4, FR_Q3 + nop.i 999 +} +// +// Create a 0x00000....01 +// poly_lo = poly_lo * rsq + h +// + +{ .mfi +(p0) setf.sig FR_dummy = GR_Perturb +(p0) fmpy.s1 FR_rsq = FR_r, FR_r + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +// +// h = N * log2_lo + h +// Y_hi = n * log2_hi + H +// +(p0) fma.s1 FR_poly_lo = FR_poly_lo, FR_r, FR_Q2 + nop.i 999 +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_poly_hi = FR_Q1, FR_rsq, FR_r + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +// +// poly_lo = r * poly_o + Q2 +// poly_hi = Q1 * rsq + r +// +(p0) fmpy.s1 FR_poly_lo = FR_poly_lo, FR_r + nop.i 999 ;; } -;; -.pred.rel "mutex",p6,p7 { .mfi - nop.m 0 -(p6) fma.s.s0 f8 = FR_A2,FR_r,f0 // result if 2^(-40) <= |x| < 1/256 - nop.i 0 + nop.m 999 +(p0) fma.s1 FR_poly_lo = FR_poly_lo, FR_rsq, FR_h + nop.i 999 ;; } + { .mfb - nop.m 0 -(p7) fma.s.s0 f8 = FR_A2,FR_r,FR_NxLn2pT // result if |x| >= 1/256 - br.ret.sptk b0 // Exit if |x| >= 2^(-40) + nop.m 999 +(p0) fadd.s1 FR_Y_lo = FR_poly_hi, FR_poly_lo +// +// Create the FR for a binary "or" +// Y_lo = poly_hi + poly_lo +// +// (p0) for FR_dummy = FR_Y_lo,FR_dummy ;; +// +// Turn the lsb of Y_lo ON +// +// (p0) fmerge.se FR_Y_lo = FR_Y_lo,FR_dummy ;; +// +// Merge the new lsb into Y_lo, for alone doesn't +// +(p0) br.cond.sptk L(LOG_main) ;; +} + + +L(log1pf_near): + +{ .mmi + nop.m 999 + nop.m 999 +// /*******************************************************/ +// /*********** Branch log1pf_near ************************/ +// /*******************************************************/ +(p0) addl GR_Table_Base = @ltoff(Constants_P#),gp ;; +} +// +// Load base address of poly. coeff. +// +{.mmi + nop.m 999 + ld8 GR_Table_Base = [GR_Table_Base] + nop.i 999 +};; + +{ .mmb +(p0) add GR_Table_ptr = 0x40,GR_Table_Base +// +// Address tables with separate pointers +// +(p0) ldfe FR_P8 = [GR_Table_Base],16 + nop.b 999 ;; +} + +{ .mmb +(p0) ldfe FR_P4 = [GR_Table_ptr],16 +// +// Load P4 +// Load P8 +// +(p0) ldfe FR_P7 = [GR_Table_Base],16 + nop.b 999 ;; +} + +{ .mmf +(p0) ldfe FR_P3 = [GR_Table_ptr],16 +// +// Load P3 +// Load P7 +// +(p0) ldfe FR_P6 = [GR_Table_Base],16 +(p0) fmpy.s1 FR_wsq = FR_W, FR_W ;; +} + +{ .mfi +(p0) ldfe FR_P2 = [GR_Table_ptr],16 + nop.f 999 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_hi = FR_W, FR_P4, FR_P3 + nop.i 999 +} +// +// Load P2 +// Load P6 +// Wsq = w * w +// Y_hi = p4 * w + p3 +// + +{ .mfi +(p0) ldfe FR_P5 = [GR_Table_Base],16 +(p0) fma.s1 FR_Y_lo = FR_W, FR_P8, FR_P7 + nop.i 999 ;; +} + +{ .mfi +(p0) ldfe FR_P1 = [GR_Table_ptr],16 +// +// Load P1 +// Load P5 +// Y_lo = p8 * w + P7 +// +(p0) fmpy.s1 FR_w4 = FR_wsq, FR_wsq + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_hi = FR_W, FR_Y_hi, FR_P2 + nop.i 999 +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_lo = FR_W, FR_Y_lo, FR_P6 +(p0) add GR_Perturb = 0x1, r0 ;; +} + +{ .mfi + nop.m 999 +// +// w4 = w2 * w2 +// Y_hi = y_hi * w + p2 +// Y_lo = y_lo * w + p6 +// Create perturbation bit +// +(p0) fmpy.s1 FR_w6 = FR_w4, FR_wsq + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_hi = FR_W, FR_Y_hi, FR_P1 + nop.i 999 +} +// +// Y_hi = y_hi * w + p1 +// w6 = w4 * w2 +// + +{ .mfi +(p0) setf.sig FR_Q4 = GR_Perturb +(p0) fma.s1 FR_Y_lo = FR_W, FR_Y_lo, FR_P5 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_Y_hi = FR_wsq,FR_Y_hi, FR_W + nop.i 999 } -;; -.align 32 -log1p_unorm: -// Here if x=unorm { .mfb - getf.exp GR_signexp_x = FR_NormX // recompute biased exponent - nop.f 0 - br.cond.sptk log1p_common + nop.m 999 +// +// Y_hi = y_hi * wsq + w +// Y_lo = y_lo * w + p5 +// +(p0) fmpy.s1 FR_Y_lo = FR_w6, FR_Y_lo +// +// Y_lo = y_lo * w6 +// +// (p0) for FR_dummy = FR_Y_lo,FR_dummy ;; +// +// Set lsb on: Taken out to improve performance +// +// (p0) fmerge.se FR_Y_lo = FR_Y_lo,FR_dummy ;; +// +// Make sure it's on in Y_lo also. Taken out to improve +// performance +// +(p0) br.cond.sptk L(LOG_main) ;; +} + + +L(log1pf_small): + +{ .mmi + nop.m 999 + nop.m 999 +// /*******************************************************/ +// /*********** Branch log1pf_small ***********************/ +// /*******************************************************/ +(p0) addl GR_Table_Base = @ltoff(Constants_Threshold#),gp } -;; -.align 32 -log1p_eq_minus_1: -// Here if x=-1 { .mfi - nop.m 0 - fmerge.s FR_X = f8,f8 // keep input argument for subsequent - // call of __libm_error_support# - nop.i 0 + nop.m 999 +(p0) mov FR_Em1 = FR_W +(p0) cmp.eq.unc p7, p0 = r0, r0 ;; +} + +{ .mlx + ld8 GR_Table_Base = [GR_Table_Base] +(p0) movl GR_Expo_Range = 0x0000000000000002 ;; +} +// +// Set Safe to true +// Set Expo_Range = 0 for single +// Set Expo_Range = 2 for double +// Set Expo_Range = 4 for double-extended +// + +{ .mmi +(p0) shladd GR_Table_Base = GR_Expo_Range,4,GR_Table_Base ;; +(p0) ldfe FR_Threshold = [GR_Table_Base],16 + nop.i 999 +} + +{ .mlx + nop.m 999 +(p0) movl GR_Bias = 0x000000000000FF9B ;; } -;; { .mfi - mov GR_TAG = 142 // set libm error in case of log1p(-1). - frcpa.s0 f8,p0 = f8,f0 // log1p(-1) should be equal to -INF. - // We can get it using frcpa because it - // sets result to the IEEE-754 mandated - // quotient of f8/f0. - nop.i 0 +(p0) ldfe FR_Tiny = [GR_Table_Base],0 + nop.f 999 + nop.i 999 ;; } -{ .mib - nop.m 0 - nop.i 0 - br.cond.sptk log_libm_err + +{ .mfi + nop.m 999 +(p0) fcmp.gt.unc.s1 p13, p12 = FR_abs_W, FR_Threshold + nop.i 999 ;; } -;; -.align 32 -log1p_lt_minus_1: -// Here if x < -1 { .mfi - nop.m 0 - fmerge.s FR_X = f8,f8 - nop.i 0 + nop.m 999 +(p13) fnmpy.s1 FR_Y_lo = FR_W, FR_W + nop.i 999 +} + +{ .mfi + nop.m 999 +(p13) fadd FR_SCALE = f0, f1 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p12) fsub.s1 FR_Y_lo = f0, FR_Tiny +(p12) cmp.ne.unc p7, p0 = r0, r0 } -;; { .mfi - mov GR_TAG = 143 // set libm error in case of x < -1. - frcpa.s0 f8,p0 = f0,f0 // log1p(x) x < -1 should be equal to NaN. - // We can get it using frcpa because it - // sets result to the IEEE-754 mandated - // quotient of f0/f0 i.e. NaN. - nop.i 0 +(p12) setf.exp FR_SCALE = GR_Bias + nop.f 999 + nop.i 999 ;; +} + +// +// Set p7 to SAFE = FALSE +// Set Scale = 2^-100 +// +{ .mfb + nop.m 999 +(p0) fma.s.s0 FR_Input_X = FR_Y_lo,FR_SCALE,FR_Y_hi +(p0) br.ret.sptk b0 } ;; -.align 32 -log_libm_err: -{ .mmi - alloc r32 = ar.pfs,1,4,4,0 - mov GR_Parameter_TAG = GR_TAG - nop.i 0 +L(LOG_64_one): + +{ .mfb + nop.m 999 +(p0) fmpy.s.s0 FR_Input_X = FR_Input_X, f0 +(p0) br.ret.sptk b0 } ;; +// +// Raise divide by zero for +/-0 input. +// + +L(LOG_64_zero): + +{ .mfi +(p0) mov GR_Parameter_TAG = 142 +// +// If we have log1pf(0), return -Inf. +// +(p0) fsub.s0 FR_Output_X_tmp = f0, f1 + nop.i 999 ;; +} +{ .mfb + nop.m 999 +(p0) frcpa.s0 FR_Output_X_tmp, p8 = FR_Output_X_tmp, f0 +(p0) br.cond.sptk L(LOG_ERROR_Support) ;; +} -GLOBAL_IEEE754_END(log1pf) +L(LOG_64_special): +{ .mfi + nop.m 999 +// +// Return -Inf or value from handler. +// +(p0) fclass.m.unc p7, p0 = FR_Input_X, 0x1E1 + nop.i 999 ;; +} -LOCAL_LIBM_ENTRY(__libm_error_region) +{ .mfb + nop.m 999 +// +// Check for Natval, QNan, SNaN, +Inf +// +(p7) fmpy.s.s0 f8 = FR_Input_X, f1 +// +// For SNaN raise invalid and return QNaN. +// For QNaN raise invalid and return QNaN. +// For +Inf return +Inf. +// +(p7) br.ret.sptk b0 +} +;; + +// +// For -Inf raise invalid and return QNaN. +// + +{ .mfb +(p0) mov GR_Parameter_TAG = 143 +(p0) fmpy.s.s0 FR_Output_X_tmp = FR_Input_X, f0 +(p0) br.cond.sptk L(LOG_ERROR_Support) ;; +} + +// +// Report that log1pf(-Inf) computed +// + +L(LOG_64_unsupported): + +// +// Return generated NaN or other value . +// + +{ .mfb + nop.m 999 +(p0) fmpy.s.s0 FR_Input_X = FR_Input_X, f0 +(p0) br.ret.sptk b0 ;; +} + +L(LOG_64_negative): + +{ .mfi + nop.m 999 +// +// Deal with x < 0 in a special way +// +(p0) frcpa.s0 FR_Output_X_tmp, p8 = f0, f0 +// +// Deal with x < 0 in a special way - raise +// invalid and produce QNaN indefinite. +// +(p0) mov GR_Parameter_TAG = 143;; +} + +.endp log1pf# +ASM_SIZE_DIRECTIVE(log1pf) + +.proc __libm_error_region +__libm_error_region: +L(LOG_ERROR_Support): .prologue + +// (1) { .mfi - add GR_Parameter_Y = -32,sp // Parameter 2 value + 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 + mov GR_SAVE_PFS=ar.pfs // Save ar.pfs } { .mfi .fframe 64 - add sp = -64,sp // Create new stack + add sp=-64,sp // Create new stack nop.f 0 - mov GR_SAVE_GP = gp // Save gp + mov GR_SAVE_GP=gp // Save gp };; + + +// (2) { .mmi - stfs [GR_Parameter_Y] = FR_Y,16 // STORE Parameter 2 on stack + stfs [GR_Parameter_Y] = f0,16 // 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 + mov GR_SAVE_B0=b0 // Save b0 };; + .body +// (3) { .mib - stfs [GR_Parameter_X] = FR_X // STORE Parameter 1 on stack - add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address - nop.b 0 + stfs [GR_Parameter_X] =FR_Input_X // STORE Parameter 1 on stack + add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address + nop.b 0 } { .mib - stfs [GR_Parameter_Y] = FR_RESULT // STORE Parameter 3 on stack + stfs [GR_Parameter_Y] = FR_Output_X_tmp // STORE Parameter 3 on stack add GR_Parameter_Y = -16,GR_Parameter_Y - br.call.sptk b0=__libm_error_support# // Call error handling function + br.call.sptk b0=__libm_error_support# // Call error handling function };; { .mmi - add GR_Parameter_RESULT = 48,sp nop.m 0 - nop.i 0 + nop.m 0 + add GR_Parameter_RESULT = 48,sp };; + +// (4) { .mmi - ldfs f8 = [GR_Parameter_RESULT] // Get return result off stack + ldfs FR_Input_X = [GR_Parameter_RESULT] // Get return result off stack .restore sp - add sp = 64,sp // Restore stack pointer - mov b0 = GR_SAVE_B0 // Restore return address + 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 + mov gp = GR_SAVE_GP // Restore gp + mov ar.pfs = GR_SAVE_PFS // Restore ar.pfs + br.ret.sptk b0 };; -LOCAL_LIBM_END(__libm_error_region) + +.endp __libm_error_region +ASM_SIZE_DIRECTIVE(__libm_error_region) + + +.proc __libm_LOG_main +__libm_LOG_main: +L(LOG_main): + +// +// kernel_log_64 computes ln(X + E) +// + +{ .mfi + nop.m 999 +(p7) fadd.s.s0 FR_Input_X = FR_Y_lo,FR_Y_hi + nop.i 999 +} + +{ .mmi + nop.m 999 + nop.m 999 +(p14) addl GR_Table_Base = @ltoff(Constants_1_by_LN10#),gp ;; +} + +{ .mmi + nop.m 999 +(p14) ld8 GR_Table_Base = [GR_Table_Base] + nop.i 999 +};; + +{ .mmi +(p14) ldfe FR_1LN10_hi = [GR_Table_Base],16 ;; +(p14) ldfe FR_1LN10_lo = [GR_Table_Base] + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p14) fmpy.s1 FR_Output_X_tmp = FR_Y_lo,FR_1LN10_hi + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p14) fma.s1 FR_Output_X_tmp = FR_Y_hi,FR_1LN10_lo,FR_Output_X_tmp + nop.i 999 ;; +} + +{ .mfb + nop.m 999 +(p14) fma.s.s0 FR_Input_X = FR_Y_hi,FR_1LN10_hi,FR_Output_X_tmp +(p0) br.ret.sptk b0 ;; +} +.endp __libm_LOG_main +ASM_SIZE_DIRECTIVE(__libm_LOG_main) + .type __libm_error_support#,@function .global __libm_error_support# - |