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Diffstat (limited to 'sysdeps/ia64/fpu/s_log1p.S')
| -rw-r--r-- | sysdeps/ia64/fpu/s_log1p.S | 1614 |
1 files changed, 1614 insertions, 0 deletions
diff --git a/sysdeps/ia64/fpu/s_log1p.S b/sysdeps/ia64/fpu/s_log1p.S new file mode 100644 index 0000000000..a49a183ce3 --- /dev/null +++ b/sysdeps/ia64/fpu/s_log1p.S @@ -0,0 +1,1614 @@ +.file "log1p.s" + +// Copyright (c) 2000, 2001, Intel Corporation +// All rights reserved. +// +// Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story, +// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation. +// +// 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 +// 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. +// +// ********************************************************************* +// +// Function: log1p(x) = ln(x+1), for double precision x values +// +// ********************************************************************* +// +// Accuracy: Very accurate for double precision values +// +// ********************************************************************* +// +// Resources Used: +// +// Floating-Point Registers: f8 (Input and Return Value) +// f9,f33-f55,f99 +// +// General Purpose Registers: +// r32-r53 +// r54-r57 (Used to pass arguments to error handling routine) +// +// Predicate Registers: p6-p15 +// +// ********************************************************************* +// +// IEEE Special Conditions: +// +// Denormal fault raised on denormal inputs +// Overflow exceptions cannot occur +// Underflow exceptions raised when appropriate for log1p +// (Error Handling Routine called for underflow) +// Inexact raised when appropriate by algorithm +// +// log1p(inf) = inf +// log1p(-inf) = QNaN +// log1p(+/-0) = +/-0 +// log1p(-1) = -inf +// log1p(SNaN) = QNaN +// log1p(QNaN) = QNaN +// log1p(EM_special Values) = QNaN +// +// ********************************************************************* +// +// Computation is based on the following kernel. +// +// 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 +// +// The method consists of three cases. +// +// If |X+Em1| < 2^(-80) use case log1p_small; +// elseif |X+Em1| < 2^(-7) use case log_near1; +// else use case log_regular; +// +// Case log1p_small: +// +// log( 1 + (X+Em1) ) can be approximated by (X+Em1). +// +// Case log_near1: +// +// 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: +// +// 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)) +// +// 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 +// +// We need to calculate log( E + X ). Obtain N, S_hi, S_lo such that +// +// E + X = 2^N * ( S_hi + S_lo ) exactly +// +// where S_hi in [1,2) and S_lo is a correction to S_hi in the sense +// that |S_lo| <= ulp(S_hi). +// +// Step 1: Argument Reduction +// +// Based on S_hi, obtain G_1, G_2, G_3 from a table and calculate +// +// 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 log1p_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. +// +// 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 +// + +#include "libm_support.h" + +#ifdef _LIBC +.rodata +#else +.data +#endif + +// P_7, P_6, P_5, P_4, P_3, P_2, and P_1 + +.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 + +.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) +// + +.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) + +.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_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 + + +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 + + +.section .text +.proc log1p# +.global log1p# +.align 64 +log1p: +#ifdef _LIBC +.global __log1p +__log1p: +#endif + +{ .mfi +alloc r32 = ar.pfs,0,22,4,0 +(p0) fsub.s1 FR_Neg_One = f0,f1 +(p0) cmp.eq.unc p7, p0 = r0, r0 +} + +{ .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 + nop.m 999 +(p0) fclass.m.unc p6, p0 = FR_Input_X, 0x1E3 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p0) fclass.nm.unc p10, p0 = FR_Input_X, 0x1FF + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p0) fcmp.eq.unc.s1 p9, p0 = FR_Input_X, f0 + nop.i 999 +} + +{ .mfi + nop.m 999 +(p0) fadd FR_Em1 = f0,f0 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fadd FR_E = f0,f1 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fcmp.eq.unc.s1 p8, p0 = FR_Input_X, FR_Neg_One + nop.i 999 +} + +{ .mfi + 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 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 log1p +// Set p14 to false for log1p +// Set p7 true for log and log1p +// +(p0) addl GR_Table_Base = @ltoff(Constants_Z_G_H_h1#),gp + nop.i 999 +} + +{ .mfi + nop.m 999 +(p0) fmax.s1 FR_AA = FR_X_Prime, FR_E + nop.i 999 ;; +} + +{ .mfi + ld8 GR_Table_Base = [GR_Table_Base] +(p0) fmin.s1 FR_BB = FR_X_Prime, FR_E + nop.i 999 +} + +{ .mfb + 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) ;; +} + +{ .mfi +(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 ;; +} + +{ .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 + 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(log1p_small) ;; +} + +{ .mib + nop.m 999 + nop.i 999 +(p12) br.cond.spnt L(log1p_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 +(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 +(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 +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 +(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 999 +(p0) fmpy.s1 FR_G = FR_G, FR_G_tmp + 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) 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 ;; +} + +{ .mfi + nop.m 999 +(p0) fma.s1 FR_poly_lo = FR_poly_lo, FR_rsq, FR_h + nop.i 999 ;; +} + +{ .mfb + 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(log1p_near): + +{ .mmi + nop.m 999 + nop.m 999 +// /*******************************************************/ +// /*********** Branch log1p_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 +} + +{ .mfb + 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(log1p_small): + +{ .mmi + nop.m 999 + nop.m 999 +// /*******************************************************/ +// /*********** Branch log1p_small ***********************/ +// /*******************************************************/ +(p0) addl GR_Table_Base = @ltoff(Constants_Threshold#),gp +} + +{ .mfi + 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 +(p0) ldfe FR_Tiny = [GR_Table_Base],0 + nop.f 999 + nop.i 999 ;; +} + +{ .mfi + nop.m 999 +(p0) fcmp.gt.unc.s1 p13, p12 = FR_abs_W, FR_Threshold + nop.i 999 ;; +} + +{ .mfi + 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 +(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.d.s0 FR_Input_X = FR_Y_lo,FR_SCALE,FR_Y_hi +(p0) br.ret.sptk b0 +} +;; + +L(LOG_64_one): + +{ .mfb + nop.m 999 +(p0) fmpy.d.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 = 140 +// +// If we have log1p(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) ;; +} + +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 ;; +} +{ .mfb + nop.m 999 +// +// Check for Natval, QNan, SNaN, +Inf +// +(p7) fmpy.d.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 = 141 +(p0) fmpy.d.s0 FR_Output_X_tmp = FR_Input_X, f0 +(p0) br.cond.sptk L(LOG_ERROR_Support) ;; +} + +// +// Report that log1p(-Inf) computed +// + +L(LOG_64_unsupported): + +// +// Return generated NaN or other value . +// + +{ .mfb + nop.m 999 +(p0) fmpy.d.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 = 141 +} + +.endp log1p# +ASM_SIZE_DIRECTIVE(log1p) + +.proc __libm_error_region +__libm_error_region: +L(LOG_ERROR_Support): +.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] = 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 +};; + +.body +// (3) +{ .mib + stfd [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 + stfd [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 +};; +{ .mmi + nop.m 0 + nop.m 0 + add GR_Parameter_RESULT = 48,sp +};; + +// (4) +{ .mmi + ldfd 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 +};; +{ .mib + mov gp = GR_SAVE_GP // Restore gp + mov ar.pfs = GR_SAVE_PFS // Restore ar.pfs + br.ret.sptk b0 +};; + +.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.d.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.d.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# |