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, 357 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf8_core_avx2.S b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf8_core_avx2.S
new file mode 100644
index 0000000000..683932f410
--- /dev/null
+++ b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_powf8_core_avx2.S
@@ -0,0 +1,357 @@
+/* Function powf vectorized with AVX2.
+   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(_ZGVdN8vv_powf_avx2)
+/*
+   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      $448, %rsp
+        lea       __VPACK_ODD_ind.6357.0.1(%rip), %rcx
+        vmovups   %ymm14, 320(%rsp)
+
+/* hi bits */
+        lea       __VPACK_ODD_ind.6358.0.1(%rip), %rax
+        vmovups   %ymm12, 256(%rsp)
+        vmovups   %ymm9, 96(%rsp)
+        vmovups   %ymm13, 224(%rsp)
+        vmovups   %ymm15, 352(%rsp)
+        vmovups   %ymm11, 384(%rsp)
+        vmovups   %ymm10, 288(%rsp)
+        vmovups   (%rcx), %ymm10
+        vmovups   %ymm8, 160(%rsp)
+        vmovdqa   %ymm1, %ymm9
+        movq      __svml_spow_data@GOTPCREL(%rip), %rdx
+        vextractf128 $1, %ymm0, %xmm7
+        vcvtps2pd %xmm0, %ymm14
+        vcvtps2pd %xmm7, %ymm12
+        vpsubd _NMINNORM(%rdx), %ymm0, %ymm7
+
+/* preserve mantissa, set input exponent to 2^(-10) */
+        vandpd _ExpMask(%rdx), %ymm14, %ymm3
+        vandpd _ExpMask(%rdx), %ymm12, %ymm13
+
+/* exponent bits selection */
+        vpsrlq    $20, %ymm12, %ymm12
+        vpsrlq    $20, %ymm14, %ymm14
+        vextractf128 $1, %ymm9, %xmm2
+        vcvtps2pd %xmm9, %ymm1
+        vpand _ABSMASK(%rdx), %ymm9, %ymm8
+        vcvtps2pd %xmm2, %ymm6
+        vorpd _Two10(%rdx), %ymm3, %ymm2
+        vorpd _Two10(%rdx), %ymm13, %ymm3
+
+/* reciprocal approximation good to at least 11 bits */
+        vcvtpd2ps %ymm2, %xmm5
+        vcvtpd2ps %ymm3, %xmm15
+        vrcpps    %xmm5, %xmm4
+        vrcpps    %xmm15, %xmm11
+        vcvtps2pd %xmm4, %ymm13
+        vcvtps2pd %xmm11, %ymm4
+        vpermps   %ymm12, %ymm10, %ymm11
+
+/* round reciprocal to nearest integer, will have 1+9 mantissa bits */
+        vroundpd  $0, %ymm13, %ymm12
+        vpermps   %ymm14, %ymm10, %ymm5
+        vroundpd  $0, %ymm4, %ymm14
+        vmovupd _One(%rdx), %ymm4
+
+/* table lookup */
+        vpsrlq    $40, %ymm12, %ymm10
+        vfmsub213pd %ymm4, %ymm12, %ymm2
+        vfmsub213pd %ymm4, %ymm14, %ymm3
+        vcmpgt_oqpd _Threshold(%rdx), %ymm12, %ymm12
+        vxorpd    %ymm4, %ymm4, %ymm4
+        vandpd _Bias(%rdx), %ymm12, %ymm12
+
+/* biased exponent in DP format */
+        vcvtdq2pd %xmm11, %ymm13
+        vpcmpeqd  %ymm11, %ymm11, %ymm11
+        vgatherqpd %ymm11, _Log2Rcp_lookup(%rdx,%ymm10), %ymm4
+        vpsrlq    $40, %ymm14, %ymm10
+        vcmpgt_oqpd _Threshold(%rdx), %ymm14, %ymm14
+        vpcmpeqd  %ymm11, %ymm11, %ymm11
+        vandpd _Bias(%rdx), %ymm14, %ymm14
+        vcvtdq2pd %xmm5, %ymm15
+        vxorpd    %ymm5, %ymm5, %ymm5
+        vgatherqpd %ymm11, _Log2Rcp_lookup(%rdx,%ymm10), %ymm5
+        vorpd _Bias1(%rdx), %ymm12, %ymm11
+        vorpd _Bias1(%rdx), %ymm14, %ymm10
+        vsubpd    %ymm11, %ymm15, %ymm11
+        vsubpd    %ymm10, %ymm13, %ymm14
+        vmovupd _poly_coeff_4(%rdx), %ymm15
+        vmovupd _poly_coeff_3(%rdx), %ymm13
+        vmulpd    %ymm3, %ymm3, %ymm10
+        vfmadd213pd %ymm15, %ymm3, %ymm13
+        vmovdqa   %ymm15, %ymm12
+        vfmadd231pd _poly_coeff_3(%rdx), %ymm2, %ymm12
+        vmulpd    %ymm2, %ymm2, %ymm15
+
+/* reconstruction */
+        vfmadd213pd %ymm3, %ymm10, %ymm13
+        vfmadd213pd %ymm2, %ymm15, %ymm12
+        vaddpd    %ymm5, %ymm13, %ymm13
+        vaddpd    %ymm4, %ymm12, %ymm2
+        vfmadd231pd _L2(%rdx), %ymm14, %ymm13
+        vfmadd132pd _L2(%rdx), %ymm2, %ymm11
+        vmulpd    %ymm6, %ymm13, %ymm2
+        vmulpd    %ymm1, %ymm11, %ymm10
+        vmulpd __dbInvLn2(%rdx), %ymm2, %ymm6
+        vmulpd __dbInvLn2(%rdx), %ymm10, %ymm15
+
+/* to round down; if dR is an integer we will get R = 1, which is ok */
+        vsubpd __dbHALF(%rdx), %ymm6, %ymm3
+        vsubpd __dbHALF(%rdx), %ymm15, %ymm1
+        vaddpd __dbShifter(%rdx), %ymm3, %ymm13
+        vaddpd __dbShifter(%rdx), %ymm1, %ymm14
+        vsubpd __dbShifter(%rdx), %ymm13, %ymm12
+        vmovups   (%rax), %ymm1
+        vsubpd __dbShifter(%rdx), %ymm14, %ymm11
+
+/* [0..1) */
+        vsubpd    %ymm12, %ymm6, %ymm6
+        vpermps   %ymm10, %ymm1, %ymm3
+        vpermps   %ymm2, %ymm1, %ymm10
+        vpcmpgtd _NMAXVAL(%rdx), %ymm7, %ymm4
+        vpcmpgtd _INF(%rdx), %ymm8, %ymm1
+        vpcmpeqd _NMAXVAL(%rdx), %ymm7, %ymm7
+        vpcmpeqd _INF(%rdx), %ymm8, %ymm8
+        vpor      %ymm7, %ymm4, %ymm2
+        vpor      %ymm8, %ymm1, %ymm1
+        vsubpd    %ymm11, %ymm15, %ymm7
+        vinsertf128 $1, %xmm10, %ymm3, %ymm10
+        vpor      %ymm1, %ymm2, %ymm3
+
+/* iAbsX = iAbsX&iAbsMask */
+        vandps __iAbsMask(%rdx), %ymm10, %ymm10
+
+/* iRangeMask = (iAbsX>iDomainRange) */
+        vpcmpgtd __iDomainRange(%rdx), %ymm10, %ymm4
+        vpor      %ymm4, %ymm3, %ymm5
+        vmulpd __dbC1(%rdx), %ymm7, %ymm4
+        vmovmskps %ymm5, %ecx
+        vmulpd __dbC1(%rdx), %ymm6, %ymm5
+
+/* low K bits */
+        vandps __lbLOWKBITS(%rdx), %ymm14, %ymm6
+
+/* dpP= _dbT+lJ*T_ITEM_GRAN */
+        vxorpd    %ymm7, %ymm7, %ymm7
+        vpcmpeqd  %ymm1, %ymm1, %ymm1
+        vandps __lbLOWKBITS(%rdx), %ymm13, %ymm2
+        vxorpd    %ymm10, %ymm10, %ymm10
+        vpcmpeqd  %ymm3, %ymm3, %ymm3
+        vgatherqpd %ymm1, 13952(%rdx,%ymm6,8), %ymm7
+        vgatherqpd %ymm3, 13952(%rdx,%ymm2,8), %ymm10
+        vpsrlq    $11, %ymm14, %ymm14
+        vpsrlq    $11, %ymm13, %ymm13
+        vfmadd213pd %ymm7, %ymm4, %ymm7
+        vfmadd213pd %ymm10, %ymm5, %ymm10
+
+/* NB : including +/- sign for the exponent!! */
+        vpsllq    $52, %ymm14, %ymm8
+        vpsllq    $52, %ymm13, %ymm11
+        vpaddq    %ymm8, %ymm7, %ymm12
+        vpaddq    %ymm11, %ymm10, %ymm1
+        vcvtpd2ps %ymm12, %xmm15
+        vcvtpd2ps %ymm1, %xmm2
+        vinsertf128 $1, %xmm2, %ymm15, %ymm1
+        testl     %ecx, %ecx
+        jne       .LBL_1_3
+
+.LBL_1_2:
+        cfi_remember_state
+        vmovups   160(%rsp), %ymm8
+        vmovups   96(%rsp), %ymm9
+        vmovups   288(%rsp), %ymm10
+        vmovups   384(%rsp), %ymm11
+        vmovups   256(%rsp), %ymm12
+        vmovups   224(%rsp), %ymm13
+        vmovups   320(%rsp), %ymm14
+        vmovups   352(%rsp), %ymm15
+        vmovdqa   %ymm1, %ymm0
+        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
+        vmovups   %ymm0, 64(%rsp)
+        vmovups   %ymm9, 128(%rsp)
+        vmovups   %ymm1, 192(%rsp)
+        je        .LBL_1_2
+
+        xorb      %dl, %dl
+        xorl      %eax, %eax
+        movq      %rsi, 8(%rsp)
+        movq      %rdi, (%rsp)
+        movq      %r12, 40(%rsp)
+        cfi_offset_rel_rsp (12, 40)
+        movb      %dl, %r12b
+        movq      %r13, 32(%rsp)
+        cfi_offset_rel_rsp (13, 32)
+        movl      %ecx, %r13d
+        movq      %r14, 24(%rsp)
+        cfi_offset_rel_rsp (14, 24)
+        movl      %eax, %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)
+        vmovups   192(%rsp), %ymm1
+        jmp       .LBL_1_2
+
+.LBL_1_10:
+        cfi_restore_state
+        movzbl    %r12b, %r15d
+        vmovss    68(%rsp,%r15,8), %xmm0
+        vmovss    132(%rsp,%r15,8), %xmm1
+        vzeroupper
+
+        call      JUMPTARGET(__powf_finite)
+
+        vmovss    %xmm0, 196(%rsp,%r15,8)
+        jmp       .LBL_1_8
+
+.LBL_1_12:
+        movzbl    %r12b, %r15d
+        vmovss    64(%rsp,%r15,8), %xmm0
+        vmovss    128(%rsp,%r15,8), %xmm1
+        vzeroupper
+
+        call      JUMPTARGET(__powf_finite)
+
+        vmovss    %xmm0, 192(%rsp,%r15,8)
+        jmp       .LBL_1_7
+
+END(_ZGVdN8vv_powf_avx2)
+
+	.section .rodata, "a"
+__VPACK_ODD_ind.6357.0.1:
+	.long	1
+	.long	3
+	.long	5
+	.long	7
+	.long	0
+	.long	0
+	.long	0
+	.long	0
+	.space 32, 0x00
+__VPACK_ODD_ind.6358.0.1:
+	.long	1
+	.long	3
+	.long	5
+	.long	7
+	.long	0
+	.long	0
+	.long	0
+	.long	0