Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 374 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf4_core_sse4.S b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf4_core_sse4.S
new file mode 100644
index 0000000000..8b1b4e74bb
--- /dev/null
+++ b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf4_core_sse4.S
@@ -0,0 +1,374 @@
+/* Function powf vectorized with SSE4.
+   Copyright (C) 2014-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include "svml_s_powf_data.h"
+
+	.text
+ENTRY (_ZGVbN4vv_powf_sse4)
+/*
+   ALGORITHM DESCRIPTION:
+
+     We are using the next identity: pow(x,y) = 2^(y * log2(x)).
+
+     1) log2(x) calculation
+        Here we use the following formula.
+        Let |x|=2^k1*X1, where k1 is integer, 1<=X1<2.
+        Let C ~= 1/ln(2),
+        Rcp1 ~= 1/X1,   X2=Rcp1*X1,
+        Rcp2 ~= 1/X2,   X3=Rcp2*X2,
+        Rcp3 ~= 1/X3,   Rcp3C ~= C/X3.
+        Then
+          log2|x| = k1 + log2(1/Rcp1) + log2(1/Rcp2) + log2(C/Rcp3C) +
+                    log2(X1*Rcp1*Rcp2*Rcp3C/C),
+        where X1*Rcp1*Rcp2*Rcp3C = C*(1+q), q is very small.
+
+        The values of Rcp1, log2(1/Rcp1), Rcp2, log2(1/Rcp2),
+        Rcp3C, log2(C/Rcp3C) are taken from tables.
+        Values of Rcp1, Rcp2, Rcp3C are such that RcpC=Rcp1*Rcp2*Rcp3C
+        is exactly represented in target precision.
+
+        log2(X1*Rcp1*Rcp2*Rcp3C/C) = log2(1+q) = ln(1+q)/ln2 =
+             = 1/(ln2)*q - 1/(2ln2)*q^2 + 1/(3ln2)*q^3 - ... =
+             = 1/(C*ln2)*cq - 1/(2*C^2*ln2)*cq^2 + 1/(3*C^3*ln2)*cq^3 - ... =
+             = (1 + a1)*cq + a2*cq^2 + a3*cq^3 + ...,
+        where
+             cq=X1*Rcp1*Rcp2*Rcp3C-C,
+             a1=1/(C*ln(2))-1 is small,
+             a2=1/(2*C^2*ln2),
+             a3=1/(3*C^3*ln2),
+                  ...
+        Log2 result is split by three parts: HH+HL+HLL
+
+     2) Calculation of y*log2(x)
+        Split y into YHi+YLo.
+        Get high PH and medium PL parts of y*log2|x|.
+        Get low PLL part of y*log2|x|.
+        Now we have PH+PL+PLL ~= y*log2|x|.
+
+     3) Calculation of 2^(y*log2(x))
+        Let's represent PH+PL+PLL in the form N + j/2^expK + Z,
+        where expK=7 in this implementation, N and j are integers,
+        0<=j<=2^expK-1, |Z|<2^(-expK-1). Hence
+        2^(PH+PL+PLL) ~= 2^N * 2^(j/2^expK) * 2^Z,
+        where 2^(j/2^expK) is stored in a table, and
+        2^Z ~= 1 + B1*Z + B2*Z^2 ... + B5*Z^5.
+        We compute 2^(PH+PL+PLL) as follows:
+        Break PH into PHH + PHL, where PHH = N + j/2^expK.
+        Z = PHL + PL + PLL
+        Exp2Poly = B1*Z + B2*Z^2 ... + B5*Z^5
+        Get 2^(j/2^expK) from table in the form THI+TLO.
+        Now we have 2^(PH+PL+PLL) ~= 2^N * (THI + TLO) * (1 + Exp2Poly).
+        Get significand of 2^(PH+PL+PLL) in the form ResHi+ResLo:
+        ResHi := THI
+        ResLo := THI * Exp2Poly + TLO
+        Get exponent ERes of the result:
+        Res := ResHi + ResLo:
+        Result := ex(Res) + N.  */
+
+        pushq     %rbp
+        cfi_adjust_cfa_offset (8)
+        cfi_rel_offset (%rbp, 0)
+        movq      %rsp, %rbp
+        cfi_def_cfa_register (%rbp)
+        andq      $-64, %rsp
+        subq      $256, %rsp
+        movaps    %xmm0, %xmm3
+        movhlps   %xmm0, %xmm3
+        movaps    %xmm1, %xmm5
+        movups    %xmm8, 112(%rsp)
+        movaps    %xmm5, %xmm2
+        cvtps2pd  %xmm3, %xmm8
+        cvtps2pd  %xmm5, %xmm7
+        movups    %xmm9, 96(%rsp)
+        movaps    %xmm0, %xmm4
+        cvtps2pd  %xmm0, %xmm9
+        movq      __svml_spow_data@GOTPCREL(%rip), %rdx
+        movups    %xmm10, 176(%rsp)
+        movups    %xmm13, 48(%rsp)
+        movups _ExpMask(%rdx), %xmm6
+
+/* preserve mantissa, set input exponent to 2^(-10) */
+        movaps    %xmm6, %xmm10
+        andps     %xmm8, %xmm6
+        andps     %xmm9, %xmm10
+
+/* exponent bits selection */
+        psrlq     $20, %xmm9
+        orps _Two10(%rdx), %xmm6
+        psrlq     $20, %xmm8
+        orps _Two10(%rdx), %xmm10
+
+/* reciprocal approximation good to at least 11 bits */
+        cvtpd2ps  %xmm6, %xmm13
+        cvtpd2ps  %xmm10, %xmm1
+        movlhps   %xmm13, %xmm13
+        movhlps   %xmm5, %xmm2
+        movlhps   %xmm1, %xmm1
+        movups    %xmm12, 208(%rsp)
+        rcpps     %xmm13, %xmm12
+        movups    %xmm11, 80(%rsp)
+        cvtps2pd  %xmm2, %xmm11
+        rcpps     %xmm1, %xmm2
+        movups    %xmm14, 144(%rsp)
+        cvtps2pd  %xmm12, %xmm14
+        movups    %xmm15, 160(%rsp)
+        cvtps2pd  %xmm2, %xmm15
+        shufps    $221, %xmm8, %xmm9
+
+/* round reciprocal to nearest integer, will have 1+9 mantissa bits */
+        roundpd   $0, %xmm14, %xmm14
+
+/* biased exponent in DP format */
+        pshufd    $238, %xmm9, %xmm8
+        roundpd   $0, %xmm15, %xmm15
+        cvtdq2pd  %xmm8, %xmm1
+        mulpd     %xmm15, %xmm10
+        mulpd     %xmm14, %xmm6
+        cvtdq2pd  %xmm9, %xmm2
+        subpd _One(%rdx), %xmm10
+        subpd _One(%rdx), %xmm6
+
+/* table lookup */
+        movaps    %xmm14, %xmm8
+        movaps    %xmm15, %xmm9
+        psrlq     $40, %xmm8
+        psrlq     $40, %xmm9
+        movd      %xmm8, %r8d
+        movd      %xmm9, %eax
+        psubd _NMINNORM(%rdx), %xmm4
+        movdqu _ABSMASK(%rdx), %xmm3
+        pextrd    $2, %xmm8, %r9d
+        pand      %xmm5, %xmm3
+        movups _Threshold(%rdx), %xmm8
+        pextrd    $2, %xmm9, %ecx
+        movaps    %xmm8, %xmm9
+        cmpltpd   %xmm15, %xmm9
+        cmpltpd   %xmm14, %xmm8
+        andps _Bias(%rdx), %xmm9
+        movaps    %xmm10, %xmm14
+        andps _Bias(%rdx), %xmm8
+        movaps    %xmm6, %xmm15
+        orps _Bias1(%rdx), %xmm9
+        orps _Bias1(%rdx), %xmm8
+        subpd     %xmm9, %xmm2
+        subpd     %xmm8, %xmm1
+        mulpd     %xmm10, %xmm14
+        mulpd     %xmm6, %xmm15
+        mulpd _L2(%rdx), %xmm2
+        mulpd _L2(%rdx), %xmm1
+        movups _poly_coeff_3(%rdx), %xmm9
+        movaps    %xmm9, %xmm8
+        mulpd     %xmm10, %xmm8
+        mulpd     %xmm6, %xmm9
+        addpd _poly_coeff_4(%rdx), %xmm8
+        addpd _poly_coeff_4(%rdx), %xmm9
+        mulpd     %xmm14, %xmm8
+        mulpd     %xmm15, %xmm9
+
+/* reconstruction */
+        addpd     %xmm8, %xmm10
+        addpd     %xmm9, %xmm6
+        movslq    %eax, %rax
+        movslq    %r8d, %r8
+        movslq    %ecx, %rcx
+        movslq    %r9d, %r9
+        movsd     _Log2Rcp_lookup(%rdx,%rax), %xmm13
+        movsd     _Log2Rcp_lookup(%rdx,%r8), %xmm12
+        movhpd    _Log2Rcp_lookup(%rdx,%rcx), %xmm13
+        movhpd    _Log2Rcp_lookup(%rdx,%r9), %xmm12
+        addpd     %xmm10, %xmm13
+        addpd     %xmm6, %xmm12
+        addpd     %xmm13, %xmm2
+        addpd     %xmm12, %xmm1
+        mulpd     %xmm7, %xmm2
+        mulpd     %xmm11, %xmm1
+        movups __dbInvLn2(%rdx), %xmm11
+        movdqa    %xmm4, %xmm12
+        movaps    %xmm11, %xmm10
+        mulpd     %xmm2, %xmm10
+        mulpd     %xmm1, %xmm11
+
+/* to round down; if dR is an integer we will get R = 1, which is ok */
+        movaps    %xmm10, %xmm8
+        movaps    %xmm11, %xmm9
+        subpd __dbHALF(%rdx), %xmm8
+        subpd __dbHALF(%rdx), %xmm9
+        addpd __dbShifter(%rdx), %xmm8
+        addpd __dbShifter(%rdx), %xmm9
+        movaps    %xmm8, %xmm6
+        movaps    %xmm9, %xmm7
+        subpd __dbShifter(%rdx), %xmm6
+        subpd __dbShifter(%rdx), %xmm7
+
+/* [0..1) */
+        subpd     %xmm6, %xmm10
+        subpd     %xmm7, %xmm11
+        mulpd __dbC1(%rdx), %xmm10
+        mulpd __dbC1(%rdx), %xmm11
+
+/* hi bits */
+        shufps    $221, %xmm1, %xmm2
+        movdqu _NMAXVAL(%rdx), %xmm1
+        pcmpgtd   %xmm1, %xmm12
+        pcmpeqd   %xmm1, %xmm4
+        por       %xmm4, %xmm12
+        movdqa    %xmm3, %xmm1
+        movdqu _INF(%rdx), %xmm4
+        pcmpgtd   %xmm4, %xmm1
+        pcmpeqd   %xmm4, %xmm3
+
+/* iAbsX = iAbsX&iAbsMask */
+        pand __iAbsMask(%rdx), %xmm2
+        por       %xmm3, %xmm1
+
+/* iRangeMask = (iAbsX>iDomainRange) */
+        pcmpgtd __iDomainRange(%rdx), %xmm2
+        por       %xmm1, %xmm12
+        movups __lbLOWKBITS(%rdx), %xmm3
+        por       %xmm2, %xmm12
+
+/* low K bits */
+        movaps    %xmm3, %xmm2
+        andps     %xmm9, %xmm3
+        andps     %xmm8, %xmm2
+        psrlq     $11, %xmm8
+
+/* dpP= _dbT+lJ*T_ITEM_GRAN */
+        movd      %xmm2, %r10d
+        psrlq     $11, %xmm9
+        movd      %xmm3, %ecx
+
+/* NB : including +/- sign for the exponent!! */
+        psllq     $52, %xmm8
+        psllq     $52, %xmm9
+        pextrw    $4, %xmm2, %r11d
+        pextrw    $4, %xmm3, %r8d
+        movmskps  %xmm12, %eax
+        shll      $3, %r10d
+        shll      $3, %ecx
+        shll      $3, %r11d
+        shll      $3, %r8d
+        movq      13952(%rdx,%r10), %xmm6
+        movq      13952(%rdx,%rcx), %xmm7
+        movhpd    13952(%rdx,%r11), %xmm6
+        movhpd    13952(%rdx,%r8), %xmm7
+        mulpd     %xmm6, %xmm10
+        mulpd     %xmm7, %xmm11
+        addpd     %xmm10, %xmm6
+        addpd     %xmm11, %xmm7
+        paddq     %xmm8, %xmm6
+        paddq     %xmm9, %xmm7
+        cvtpd2ps  %xmm6, %xmm1
+        cvtpd2ps  %xmm7, %xmm4
+        movlhps   %xmm4, %xmm1
+        testl     %eax, %eax
+        jne       .LBL_1_3
+
+.LBL_1_2:
+        cfi_remember_state
+        movups    112(%rsp), %xmm8
+        movaps    %xmm1, %xmm0
+        movups    96(%rsp), %xmm9
+        movups    176(%rsp), %xmm10
+        movups    80(%rsp), %xmm11
+        movups    208(%rsp), %xmm12
+        movups    48(%rsp), %xmm13
+        movups    144(%rsp), %xmm14
+        movups    160(%rsp), %xmm15
+        movq      %rbp, %rsp
+        cfi_def_cfa_register (%rsp)
+        popq      %rbp
+        cfi_adjust_cfa_offset (-8)
+        cfi_restore (%rbp)
+        ret
+
+.LBL_1_3:
+        cfi_restore_state
+        movups    %xmm0, 64(%rsp)
+        movups    %xmm5, 128(%rsp)
+        movups    %xmm1, 192(%rsp)
+        je        .LBL_1_2
+
+        xorb      %cl, %cl
+        xorl      %edx, %edx
+        movq      %rsi, 8(%rsp)
+        movq      %rdi, (%rsp)
+        movq      %r12, 40(%rsp)
+        cfi_offset_rel_rsp (12, 40)
+        movb      %cl, %r12b
+        movq      %r13, 32(%rsp)
+        cfi_offset_rel_rsp (13, 32)
+        movl      %eax, %r13d
+        movq      %r14, 24(%rsp)
+        cfi_offset_rel_rsp (14, 24)
+        movl      %edx, %r14d
+        movq      %r15, 16(%rsp)
+        cfi_offset_rel_rsp (15, 16)
+        cfi_remember_state
+
+.LBL_1_6:
+        btl       %r14d, %r13d
+        jc        .LBL_1_12
+
+.LBL_1_7:
+        lea       1(%r14), %esi
+        btl       %esi, %r13d
+        jc        .LBL_1_10
+
+.LBL_1_8:
+        incb      %r12b
+        addl      $2, %r14d
+        cmpb      $16, %r12b
+        jb        .LBL_1_6
+
+        movq      8(%rsp), %rsi
+        movq      (%rsp), %rdi
+        movq      40(%rsp), %r12
+        cfi_restore (%r12)
+        movq      32(%rsp), %r13
+        cfi_restore (%r13)
+        movq      24(%rsp), %r14
+        cfi_restore (%r14)
+        movq      16(%rsp), %r15
+        cfi_restore (%r15)
+        movups    192(%rsp), %xmm1
+        jmp       .LBL_1_2
+
+.LBL_1_10:
+        cfi_restore_state
+        movzbl    %r12b, %r15d
+        movss     68(%rsp,%r15,8), %xmm0
+        movss     132(%rsp,%r15,8), %xmm1
+
+        call      JUMPTARGET(__powf_finite)
+
+        movss     %xmm0, 196(%rsp,%r15,8)
+        jmp       .LBL_1_8
+
+.LBL_1_12:
+        movzbl    %r12b, %r15d
+        movss     64(%rsp,%r15,8), %xmm0
+        movss     128(%rsp,%r15,8), %xmm1
+
+        call      JUMPTARGET(__powf_finite)
+
+        movss     %xmm0, 192(%rsp,%r15,8)
+        jmp       .LBL_1_7
+
+END (_ZGVbN4vv_powf_sse4)