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, 194 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core_sse4.S b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core_sse4.S
new file mode 100644
index 0000000000..156face181
--- /dev/null
+++ b/REORG.TODO/sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core_sse4.S
@@ -0,0 +1,194 @@
+/* Function logf 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_logf_data.h"
+
+	.text
+ENTRY (_ZGVbN4v_logf_sse4)
+/*
+   ALGORITHM DESCRIPTION:
+
+     log(x) = exponent_x*log(2) + log(mantissa_x),         if mantissa_x<4/3
+     log(x) = (exponent_x+1)*log(2) + log(0.5*mantissa_x), if mantissa_x>4/3
+
+     R = mantissa_x - 1,     if mantissa_x<4/3
+     R = 0.5*mantissa_x - 1, if mantissa_x>4/3
+     |R|< 1/3
+
+     log(1+R) is approximated as a polynomial: degree 9 for 1-ulp,
+     degree 7 for 4-ulp, degree 3 for half-precision.  */
+
+        pushq     %rbp
+        cfi_adjust_cfa_offset (8)
+        cfi_rel_offset (%rbp, 0)
+        movq      %rsp, %rbp
+        cfi_def_cfa_register (%rbp)
+        andq      $-64, %rsp
+        subq      $320, %rsp
+
+/* reduction: compute r,n */
+        movaps    %xmm0, %xmm2
+
+/* check for working range,
+   set special argument mask (denormals/zero/Inf/NaN) */
+        movq      __svml_slog_data@GOTPCREL(%rip), %rax
+        movdqu _iHiDelta(%rax), %xmm1
+        movdqu _iLoRange(%rax), %xmm4
+        paddd     %xmm0, %xmm1
+        movdqu _iBrkValue(%rax), %xmm3
+        pcmpgtd   %xmm1, %xmm4
+        movdqu _iOffExpoMask(%rax), %xmm1
+        psubd     %xmm3, %xmm2
+        pand      %xmm2, %xmm1
+
+/* exponent_x (mantissa_x<4/3) or exponent_x+1 (mantissa_x>4/3) */
+        psrad     $23, %xmm2
+        paddd     %xmm3, %xmm1
+        movups _sPoly_7(%rax), %xmm5
+
+/* mantissa_x (mantissa_x<4/3), or 0.5*mantissa_x (mantissa_x>4/3) */
+        cvtdq2ps  %xmm2, %xmm6
+
+/* reduced argument R */
+        subps _sOne(%rax), %xmm1
+        movmskps  %xmm4, %ecx
+
+/* final reconstruction:
+   add exponent_value*log2 to polynomial result */
+        mulps _sLn2(%rax), %xmm6
+
+/* polynomial evaluation starts here */
+        mulps     %xmm1, %xmm5
+        addps _sPoly_6(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+        addps _sPoly_5(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+        addps _sPoly_4(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+        addps _sPoly_3(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+        addps _sPoly_2(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+        addps _sPoly_1(%rax), %xmm5
+        mulps     %xmm1, %xmm5
+
+/* polynomial evaluation end */
+        mulps     %xmm1, %xmm5
+        addps     %xmm5, %xmm1
+        addps     %xmm6, %xmm1
+        testl     %ecx, %ecx
+        jne       .LBL_1_3
+
+.LBL_1_2:
+        cfi_remember_state
+        movdqa    %xmm1, %xmm0
+        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, 192(%rsp)
+        movups    %xmm1, 256(%rsp)
+        je        .LBL_1_2
+
+        xorb      %dl, %dl
+        xorl      %eax, %eax
+        movups    %xmm8, 112(%rsp)
+        movups    %xmm9, 96(%rsp)
+        movups    %xmm10, 80(%rsp)
+        movups    %xmm11, 64(%rsp)
+        movups    %xmm12, 48(%rsp)
+        movups    %xmm13, 32(%rsp)
+        movups    %xmm14, 16(%rsp)
+        movups    %xmm15, (%rsp)
+        movq      %rsi, 136(%rsp)
+        movq      %rdi, 128(%rsp)
+        movq      %r12, 168(%rsp)
+        cfi_offset_rel_rsp (12, 168)
+        movb      %dl, %r12b
+        movq      %r13, 160(%rsp)
+        cfi_offset_rel_rsp (13, 160)
+        movl      %ecx, %r13d
+        movq      %r14, 152(%rsp)
+        cfi_offset_rel_rsp (14, 152)
+        movl      %eax, %r14d
+        movq      %r15, 144(%rsp)
+        cfi_offset_rel_rsp (15, 144)
+        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
+
+        movups    112(%rsp), %xmm8
+        movups    96(%rsp), %xmm9
+        movups    80(%rsp), %xmm10
+        movups    64(%rsp), %xmm11
+        movups    48(%rsp), %xmm12
+        movups    32(%rsp), %xmm13
+        movups    16(%rsp), %xmm14
+        movups    (%rsp), %xmm15
+        movq      136(%rsp), %rsi
+        movq      128(%rsp), %rdi
+        movq      168(%rsp), %r12
+        cfi_restore (%r12)
+        movq      160(%rsp), %r13
+        cfi_restore (%r13)
+        movq      152(%rsp), %r14
+        cfi_restore (%r14)
+        movq      144(%rsp), %r15
+        cfi_restore (%r15)
+        movups    256(%rsp), %xmm1
+        jmp       .LBL_1_2
+
+.LBL_1_10:
+        cfi_restore_state
+        movzbl    %r12b, %r15d
+        movss     196(%rsp,%r15,8), %xmm0
+
+        call      JUMPTARGET(__logf_finite)
+
+        movss     %xmm0, 260(%rsp,%r15,8)
+        jmp       .LBL_1_8
+
+.LBL_1_12:
+        movzbl    %r12b, %r15d
+        movss     192(%rsp,%r15,8), %xmm0
+
+        call      JUMPTARGET(__logf_finite)
+
+        movss     %xmm0, 256(%rsp,%r15,8)
+        jmp       .LBL_1_7
+
+END (_ZGVbN4v_logf_sse4)