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, 202 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_expf8_core_avx2.S b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_expf8_core_avx2.S
new file mode 100644
index 0000000000..b4a070ac86
--- /dev/null
+++ b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_expf8_core_avx2.S
@@ -0,0 +1,202 @@
+/* Function expf 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_expf_data.h"
+
+	.text
+ENTRY(_ZGVdN8v_expf_avx2)
+/*
+   ALGORITHM DESCRIPTION:
+
+     Argument representation:
+     M = rint(X*2^k/ln2) = 2^k*N+j
+     X = M*ln2/2^k + r = N*ln2 + ln2*(j/2^k) + r
+     then -ln2/2^(k+1) < r < ln2/2^(k+1)
+     Alternatively:
+     M = trunc(X*2^k/ln2)
+     then 0 < r < ln2/2^k
+
+     Result calculation:
+     exp(X) = exp(N*ln2 + ln2*(j/2^k) + r)
+     = 2^N * 2^(j/2^k) * exp(r)
+     2^N is calculated by bit manipulation
+     2^(j/2^k) is computed from table lookup
+     exp(r) is approximated by polynomial
+
+     The table lookup is skipped if k = 0.
+     For low accuracy approximation, exp(r) ~ 1 or 1+r.  */
+
+        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
+        movq      __svml_sexp_data@GOTPCREL(%rip), %rax
+        vmovaps   %ymm0, %ymm2
+        vmovups __sInvLn2(%rax), %ymm7
+        vmovups __sShifter(%rax), %ymm4
+        vmovups __sLn2hi(%rax), %ymm3
+        vmovups __sPC5(%rax), %ymm1
+
+/* m = x*2^k/ln2 + shifter */
+        vfmadd213ps %ymm4, %ymm2, %ymm7
+
+/* n = m - shifter = rint(x*2^k/ln2) */
+        vsubps    %ymm4, %ymm7, %ymm0
+        vpaddd __iBias(%rax), %ymm7, %ymm4
+
+/* remove sign of x by "and" operation */
+        vandps __iAbsMask(%rax), %ymm2, %ymm5
+
+/* compare against threshold */
+        vpcmpgtd __iDomainRange(%rax), %ymm5, %ymm6
+
+/* r = x-n*ln2_hi/2^k */
+        vmovaps   %ymm2, %ymm5
+        vfnmadd231ps %ymm0, %ymm3, %ymm5
+
+/* r = r-n*ln2_lo/2^k = x - n*ln2/2^k */
+        vfnmadd132ps __sLn2lo(%rax), %ymm5, %ymm0
+
+/* c5*r+c4 */
+        vfmadd213ps __sPC4(%rax), %ymm0, %ymm1
+
+/* (c5*r+c4)*r+c3 */
+        vfmadd213ps __sPC3(%rax), %ymm0, %ymm1
+
+/* ((c5*r+c4)*r+c3)*r+c2 */
+        vfmadd213ps __sPC2(%rax), %ymm0, %ymm1
+
+/* (((c5*r+c4)*r+c3)*r+c2)*r+c1 */
+        vfmadd213ps __sPC1(%rax), %ymm0, %ymm1
+
+/* exp(r) = ((((c5*r+c4)*r+c3)*r+c2)*r+c1)*r+c0 */
+        vfmadd213ps __sPC0(%rax), %ymm0, %ymm1
+
+/* set mask for overflow/underflow */
+        vmovmskps %ymm6, %ecx
+
+/* compute 2^N with "shift" */
+        vpslld    $23, %ymm4, %ymm6
+
+/* 2^N*exp(r) */
+        vmulps    %ymm1, %ymm6, %ymm0
+        testl     %ecx, %ecx
+        jne       .LBL_1_3
+
+.LBL_1_2:
+        cfi_remember_state
+        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   %ymm2, 320(%rsp)
+        vmovups   %ymm0, 384(%rsp)
+        je        .LBL_1_2
+
+        xorb      %dl, %dl
+        xorl      %eax, %eax
+        vmovups   %ymm8, 224(%rsp)
+        vmovups   %ymm9, 192(%rsp)
+        vmovups   %ymm10, 160(%rsp)
+        vmovups   %ymm11, 128(%rsp)
+        vmovups   %ymm12, 96(%rsp)
+        vmovups   %ymm13, 64(%rsp)
+        vmovups   %ymm14, 32(%rsp)
+        vmovups   %ymm15, (%rsp)
+        movq      %rsi, 264(%rsp)
+        movq      %rdi, 256(%rsp)
+        movq      %r12, 296(%rsp)
+        cfi_offset_rel_rsp (12, 296)
+        movb      %dl, %r12b
+        movq      %r13, 288(%rsp)
+        cfi_offset_rel_rsp (13, 288)
+        movl      %ecx, %r13d
+        movq      %r14, 280(%rsp)
+        cfi_offset_rel_rsp (14, 280)
+        movl      %eax, %r14d
+        movq      %r15, 272(%rsp)
+        cfi_offset_rel_rsp (15, 272)
+        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
+
+        vmovups   224(%rsp), %ymm8
+        vmovups   192(%rsp), %ymm9
+        vmovups   160(%rsp), %ymm10
+        vmovups   128(%rsp), %ymm11
+        vmovups   96(%rsp), %ymm12
+        vmovups   64(%rsp), %ymm13
+        vmovups   32(%rsp), %ymm14
+        vmovups   (%rsp), %ymm15
+        vmovups   384(%rsp), %ymm0
+        movq      264(%rsp), %rsi
+        movq      256(%rsp), %rdi
+        movq      296(%rsp), %r12
+        cfi_restore (%r12)
+        movq      288(%rsp), %r13
+        cfi_restore (%r13)
+        movq      280(%rsp), %r14
+        cfi_restore (%r14)
+        movq      272(%rsp), %r15
+        cfi_restore (%r15)
+        jmp       .LBL_1_2
+
+.LBL_1_10:
+        cfi_restore_state
+        movzbl    %r12b, %r15d
+        vmovss    324(%rsp,%r15,8), %xmm0
+        vzeroupper
+
+        call      JUMPTARGET(__expf_finite)
+
+        vmovss    %xmm0, 388(%rsp,%r15,8)
+        jmp       .LBL_1_8
+
+.LBL_1_12:
+        movzbl    %r12b, %r15d
+        vmovss    320(%rsp,%r15,8), %xmm0
+        vzeroupper
+
+        call      JUMPTARGET(__expf_finite)
+
+        vmovss    %xmm0, 384(%rsp,%r15,8)
+        jmp       .LBL_1_7
+
+END(_ZGVdN8v_expf_avx2)