libgcc/config/i386/i386-asm.h

   1 /* Defines common perprocessor and assembly macros for use by various stubs.
   2    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   3    Contributed by Daniel Santos <daniel.santos@pobox.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef I386_ASM_H
  27 #define I386_ASM_H
  28
  29 #include "auto-host.h"
  30
  31 #define PASTE2(a, b) PASTE2a(a, b)
  32 #define PASTE2a(a, b) a ## b
  33
  34 /* These macros currently support GNU/Linux, Solaris and Darwin.  */
  35
  36 #ifdef __ELF__
  37 # define FN_TYPE(fn) .type fn,@function
  38 # define FN_SIZE(fn) .size fn,.-fn
  39 # ifdef HAVE_GAS_HIDDEN
  40 #  define FN_HIDDEN(fn) .hidden fn
  41 # endif
  42 #else
  43 # define FN_TYPE(fn)
  44 # define FN_SIZE(fn)
  45 #endif
  46
  47 #ifndef FN_HIDDEN
  48 # define FN_HIDDEN(fn)
  49 #endif
  50
  51 #ifdef __USER_LABEL_PREFIX__
  52 # define ASMNAME(name)          PASTE2(__USER_LABEL_PREFIX__, name)
  53 #else
  54 # define ASMNAME(name)          name
  55 #endif
  56
  57 #define FUNC_BEGIN(fn)          \
  58         .globl ASMNAME(fn);     \
  59         FN_TYPE (ASMNAME(fn));  \
  60 ASMNAME(fn):
  61
  62 #define HIDDEN_FUNC(fn)         \
  63         .globl ASMNAME(fn);     \
  64         FN_TYPE(ASMNAME(fn));   \
  65         FN_HIDDEN(ASMNAME(fn)); \
  66 ASMNAME(fn):
  67
  68 #define FUNC_END(fn) FN_SIZE(ASMNAME(fn))
  69
  70 #ifdef MS2SYSV_STUB_AVX
  71 # define MS2SYSV_STUB_PREFIX __avx_
  72 # define MOVAPS vmovaps
  73 #elif defined(MS2SYSV_STUB_SSE)
  74 # define MS2SYSV_STUB_PREFIX __sse_
  75 # define MOVAPS movaps
  76 #endif
  77
  78 #if defined (MS2SYSV_STUB_PREFIX) && defined (MOVAPS)
  79
  80 # define MS2SYSV_STUB_BEGIN(base_name) \
  81         HIDDEN_FUNC(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
  82
  83 # define MS2SYSV_STUB_END(base_name) \
  84         FUNC_END(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
  85
  86 /* Save SSE registers 6-15. off is the offset of rax to get to xmm6.  */
  87 # define SSE_SAVE                  \
  88         MOVAPS %xmm15,-0x30(%rax); \
  89         MOVAPS %xmm14,-0x20(%rax); \
  90         MOVAPS %xmm13,-0x10(%rax); \
  91         MOVAPS %xmm12,     (%rax); \
  92         MOVAPS %xmm11, 0x10(%rax); \
  93         MOVAPS %xmm10, 0x20(%rax); \
  94         MOVAPS %xmm9,  0x30(%rax); \
  95         MOVAPS %xmm8,  0x40(%rax); \
  96         MOVAPS %xmm7,  0x50(%rax); \
  97         MOVAPS %xmm6,  0x60(%rax)
  98
  99 /* Restore SSE registers 6-15. off is the offset of rsi to get to xmm6.  */
 100 # define SSE_RESTORE                \
 101         MOVAPS -0x30(%rsi), %xmm15; \
 102         MOVAPS -0x20(%rsi), %xmm14; \
 103         MOVAPS -0x10(%rsi), %xmm13; \
 104         MOVAPS      (%rsi), %xmm12; \
 105         MOVAPS  0x10(%rsi), %xmm11; \
 106         MOVAPS  0x20(%rsi), %xmm10; \
 107         MOVAPS  0x30(%rsi), %xmm9 ; \
 108         MOVAPS  0x40(%rsi), %xmm8 ; \
 109         MOVAPS  0x50(%rsi), %xmm7 ; \
 110         MOVAPS  0x60(%rsi), %xmm6
 111
 112 #endif /* defined (MS2SYSV_STUB_ISA) && defined (MOVAPS) */
 113 #endif /* I386_ASM_H */