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-target.h"
  30 #include "auto-host.h"
  31
  32 #define PASTE2(a, b) PASTE2a(a, b)
  33 #define PASTE2a(a, b) a ## b
  34
  35 /* These macros currently support GNU/Linux, Solaris and Darwin.  */
  36
  37 #ifdef __ELF__
  38 # define FN_TYPE(fn) .type fn,@function
  39 # define FN_SIZE(fn) .size fn,.-fn
  40 # ifdef HAVE_GAS_HIDDEN
  41 #  define FN_HIDDEN(fn) .hidden fn
  42 # endif
  43 #else
  44 # define FN_TYPE(fn)
  45 # define FN_SIZE(fn)
  46 #endif
  47
  48 #ifndef FN_HIDDEN
  49 # define FN_HIDDEN(fn)
  50 #endif
  51
  52 #ifdef __USER_LABEL_PREFIX__
  53 # define ASMNAME(name)          PASTE2(__USER_LABEL_PREFIX__, name)
  54 #else
  55 # define ASMNAME(name)          name
  56 #endif
  57
  58 #define FUNC_BEGIN(fn)          \
  59         .globl ASMNAME(fn);     \
  60         FN_TYPE (ASMNAME(fn));  \
  61 ASMNAME(fn):
  62
  63 #define HIDDEN_FUNC(fn)         \
  64         .globl ASMNAME(fn);     \
  65         FN_TYPE(ASMNAME(fn));   \
  66         FN_HIDDEN(ASMNAME(fn)); \
  67 ASMNAME(fn):
  68
  69 #define FUNC_END(fn) FN_SIZE(ASMNAME(fn))
  70
  71 #ifdef MS2SYSV_STUB_AVX
  72 # define MS2SYSV_STUB_PREFIX __avx_
  73 # ifdef HAVE_AS_AVX
  74 #  define MOVAPS vmovaps
  75 # endif
  76 #elif defined(MS2SYSV_STUB_SSE)
  77 # define MS2SYSV_STUB_PREFIX __sse_
  78 # define MOVAPS movaps
  79 #endif
  80
  81 #ifdef MS2SYSV_STUB_PREFIX
  82
  83 # define MS2SYSV_STUB_BEGIN(base_name) \
  84         HIDDEN_FUNC(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
  85
  86 # define MS2SYSV_STUB_END(base_name) \
  87         FUNC_END(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
  88
  89 /* If expanding for sse or avx and we have assembler support.  */
  90 # ifdef MOVAPS
  91 /* Save SSE registers 6-15 using rax as the base address.  */
  92 #  define SSE_SAVE                 \
  93         MOVAPS %xmm15,-0x30(%rax); \
  94         MOVAPS %xmm14,-0x20(%rax); \
  95         MOVAPS %xmm13,-0x10(%rax); \
  96         MOVAPS %xmm12,     (%rax); \
  97         MOVAPS %xmm11, 0x10(%rax); \
  98         MOVAPS %xmm10, 0x20(%rax); \
  99         MOVAPS %xmm9,  0x30(%rax); \
 100         MOVAPS %xmm8,  0x40(%rax); \
 101         MOVAPS %xmm7,  0x50(%rax); \
 102         MOVAPS %xmm6,  0x60(%rax)
 103
 104 /* Restore SSE registers 6-15 using rsi as the base address.  */
 105 #  define SSE_RESTORE               \
 106         MOVAPS -0x30(%rsi), %xmm15; \
 107         MOVAPS -0x20(%rsi), %xmm14; \
 108         MOVAPS -0x10(%rsi), %xmm13; \
 109         MOVAPS      (%rsi), %xmm12; \
 110         MOVAPS  0x10(%rsi), %xmm11; \
 111         MOVAPS  0x20(%rsi), %xmm10; \
 112         MOVAPS  0x30(%rsi), %xmm9 ; \
 113         MOVAPS  0x40(%rsi), %xmm8 ; \
 114         MOVAPS  0x50(%rsi), %xmm7 ; \
 115         MOVAPS  0x60(%rsi), %xmm6
 116 # else /* MOVAPS */
 117 /* If the assembler doesn't support AVX then directly emit machine code
 118    for the instructions above.  */
 119 #  define SSE_SAVE                                                           \
 120         .byte 0xc5, 0x78, 0x29, 0x78, 0xd0; /* vmovaps %xmm15,-0x30(%rax) */ \
 121         .byte 0xc5, 0x78, 0x29, 0x70, 0xe0; /* vmovaps %xmm14,-0x20(%rax) */ \
 122         .byte 0xc5, 0x78, 0x29, 0x68, 0xf0; /* vmovaps %xmm13,-0x10(%rax) */ \
 123         .byte 0xc5, 0x78, 0x29, 0x20;       /* vmovaps %xmm12,     (%rax) */ \
 124         .byte 0xc5, 0x78, 0x29, 0x58, 0x10; /* vmovaps %xmm11, 0x10(%rax) */ \
 125         .byte 0xc5, 0x78, 0x29, 0x50, 0x20; /* vmovaps %xmm10, 0x20(%rax) */ \
 126         .byte 0xc5, 0x78, 0x29, 0x48, 0x30; /* vmovaps %xmm9,  0x30(%rax) */ \
 127         .byte 0xc5, 0x78, 0x29, 0x40, 0x40; /* vmovaps %xmm8,  0x40(%rax) */ \
 128         .byte 0xc5, 0xf8, 0x29, 0x78, 0x50; /* vmovaps %xmm7,  0x50(%rax) */ \
 129         .byte 0xc5, 0xf8, 0x29, 0x70, 0x60; /* vmovaps %xmm6,  0x60(%rax) */
 130 #  define SSE_RESTORE                                                        \
 131         .byte 0xc5, 0x78, 0x28, 0x7e, 0xd0; /* vmovaps -0x30(%rsi),%xmm15 */ \
 132         .byte 0xc5, 0x78, 0x28, 0x76, 0xe0; /* vmovaps -0x20(%rsi),%xmm14 */ \
 133         .byte 0xc5, 0x78, 0x28, 0x6e, 0xf0; /* vmovaps -0x10(%rsi),%xmm13 */ \
 134         .byte 0xc5, 0x78, 0x28, 0x26;       /* vmovaps      (%rsi),%xmm12 */ \
 135         .byte 0xc5, 0x78, 0x28, 0x5e, 0x10; /* vmovaps  0x10(%rsi),%xmm11 */ \
 136         .byte 0xc5, 0x78, 0x28, 0x56, 0x20; /* vmovaps  0x20(%rsi),%xmm10 */ \
 137         .byte 0xc5, 0x78, 0x28, 0x4e, 0x30; /* vmovaps  0x30(%rsi),%xmm9  */ \
 138         .byte 0xc5, 0x78, 0x28, 0x46, 0x40; /* vmovaps  0x40(%rsi),%xmm8  */ \
 139         .byte 0xc5, 0xf8, 0x28, 0x7e, 0x50; /* vmovaps  0x50(%rsi),%xmm7  */ \
 140         .byte 0xc5, 0xf8, 0x28, 0x76, 0x60; /* vmovaps  0x60(%rsi),%xmm6  */
 141 # endif /* MOVAPS */
 142 #endif /* MS2SYSV_STUB_PREFIX */
 143 #endif /* I386_ASM_H */