libgcc/config/i386/i386-asm.h

   1 /* Defines common perprocessor and assembly macros for use by various stubs.
   2    Copyright (C) 2016-2018 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 #undef PACKAGE_VERSION
  31 #undef PACKAGE_NAME
  32 #undef PACKAGE_STRING
  33 #undef PACKAGE_TARNAME
  34 #undef PACKAGE_URL
  35 #include "auto-host.h"
  36
  37 #ifndef USE_GAS_CFI_DIRECTIVES
  38 # ifdef __GCC_HAVE_DWARF2_CFI_ASM
  39 #  define USE_GAS_CFI_DIRECTIVES 1
  40 # else
  41 #  define USE_GAS_CFI_DIRECTIVES 0
  42 # endif
  43 #endif
  44 #if USE_GAS_CFI_DIRECTIVES
  45 # define cfi_startproc()                .cfi_startproc
  46 # define cfi_endproc()                  .cfi_endproc
  47 # define cfi_adjust_cfa_offset(X)       .cfi_adjust_cfa_offset X
  48 # define cfi_def_cfa_register(X)        .cfi_def_cfa_register X
  49 # define cfi_def_cfa(R,O)               .cfi_def_cfa R, O
  50 # define cfi_register(D,S)              .cfi_register D, S
  51 # define cfi_offset(R,O)                .cfi_offset R, O
  52 # ifdef __x86_64__
  53 #  define cfi_push(X)           .cfi_adjust_cfa_offset 8; .cfi_rel_offset X, 0
  54 #  define cfi_pop(X)            .cfi_adjust_cfa_offset -8; .cfi_restore X
  55 # else
  56 #  define cfi_push(X)           .cfi_adjust_cfa_offset 4; .cfi_rel_offset X, 0
  57 #  define cfi_pop(X)            .cfi_adjust_cfa_offset -4; .cfi_restore X
  58 # endif
  59 #else
  60 # define cfi_startproc()
  61 # define cfi_endproc()
  62 # define cfi_adjust_cfa_offset(X)
  63 # define cfi_def_cfa_register(X)
  64 # define cfi_def_cfa(R,O)
  65 # define cfi_register(D,S)
  66 # define cfi_offset(R,O)
  67 # define cfi_push(X)
  68 # define cfi_pop(X)
  69 #endif
  70
  71 #define PASTE2(a, b) PASTE2a(a, b)
  72 #define PASTE2a(a, b) a ## b
  73
  74 /* These macros currently support GNU/Linux, Solaris and Darwin.  */
  75
  76 #ifdef __ELF__
  77 # define FN_TYPE(fn) .type fn,@function
  78 # define FN_SIZE(fn) .size fn,.-fn
  79 # ifdef HAVE_GAS_HIDDEN
  80 #  define FN_HIDDEN(fn) .hidden fn
  81 # endif
  82 #else
  83 # define FN_TYPE(fn)
  84 # define FN_SIZE(fn)
  85 #endif
  86
  87 #ifndef FN_HIDDEN
  88 # define FN_HIDDEN(fn)
  89 #endif
  90
  91 #ifdef __USER_LABEL_PREFIX__
  92 # define ASMNAME(name)          PASTE2(__USER_LABEL_PREFIX__, name)
  93 #else
  94 # define ASMNAME(name)          name
  95 #endif
  96
  97 #define FUNC_BEGIN(fn)          \
  98         .globl ASMNAME(fn);     \
  99         FN_TYPE (ASMNAME(fn));  \
 100 ASMNAME(fn):
 101
 102 #define HIDDEN_FUNC(fn)         \
 103         .globl ASMNAME(fn);     \
 104         FN_TYPE(ASMNAME(fn));   \
 105         FN_HIDDEN(ASMNAME(fn)); \
 106 ASMNAME(fn):
 107
 108 #define FUNC_END(fn) FN_SIZE(ASMNAME(fn))
 109
 110 #ifdef MS2SYSV_STUB_AVX
 111 # define MS2SYSV_STUB_PREFIX __avx_
 112 # ifdef HAVE_AS_AVX
 113 #  define MOVAPS vmovaps
 114 # endif
 115 #elif defined(MS2SYSV_STUB_SSE)
 116 # define MS2SYSV_STUB_PREFIX __sse_
 117 # define MOVAPS movaps
 118 #endif
 119
 120 #ifdef MS2SYSV_STUB_PREFIX
 121
 122 # define MS2SYSV_STUB_BEGIN(base_name) \
 123         HIDDEN_FUNC(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
 124
 125 # define MS2SYSV_STUB_END(base_name) \
 126         FUNC_END(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
 127
 128 /* If expanding for sse or avx and we have assembler support.  */
 129 # ifdef MOVAPS
 130 /* Save SSE registers 6-15 using rax as the base address.  */
 131 #  define SSE_SAVE                 \
 132         MOVAPS %xmm15,-0x30(%rax); \
 133         MOVAPS %xmm14,-0x20(%rax); \
 134         MOVAPS %xmm13,-0x10(%rax); \
 135         MOVAPS %xmm12,     (%rax); \
 136         MOVAPS %xmm11, 0x10(%rax); \
 137         MOVAPS %xmm10, 0x20(%rax); \
 138         MOVAPS %xmm9,  0x30(%rax); \
 139         MOVAPS %xmm8,  0x40(%rax); \
 140         MOVAPS %xmm7,  0x50(%rax); \
 141         MOVAPS %xmm6,  0x60(%rax)
 142
 143 /* Restore SSE registers 6-15 using rsi as the base address.  */
 144 #  define SSE_RESTORE               \
 145         MOVAPS -0x30(%rsi), %xmm15; \
 146         MOVAPS -0x20(%rsi), %xmm14; \
 147         MOVAPS -0x10(%rsi), %xmm13; \
 148         MOVAPS      (%rsi), %xmm12; \
 149         MOVAPS  0x10(%rsi), %xmm11; \
 150         MOVAPS  0x20(%rsi), %xmm10; \
 151         MOVAPS  0x30(%rsi), %xmm9 ; \
 152         MOVAPS  0x40(%rsi), %xmm8 ; \
 153         MOVAPS  0x50(%rsi), %xmm7 ; \
 154         MOVAPS  0x60(%rsi), %xmm6
 155 # else /* MOVAPS */
 156 /* If the assembler doesn't support AVX then directly emit machine code
 157    for the instructions above.  */
 158 #  define SSE_SAVE                                                           \
 159         .byte 0xc5, 0x78, 0x29, 0x78, 0xd0; /* vmovaps %xmm15,-0x30(%rax) */ \
 160         .byte 0xc5, 0x78, 0x29, 0x70, 0xe0; /* vmovaps %xmm14,-0x20(%rax) */ \
 161         .byte 0xc5, 0x78, 0x29, 0x68, 0xf0; /* vmovaps %xmm13,-0x10(%rax) */ \
 162         .byte 0xc5, 0x78, 0x29, 0x20;       /* vmovaps %xmm12,     (%rax) */ \
 163         .byte 0xc5, 0x78, 0x29, 0x58, 0x10; /* vmovaps %xmm11, 0x10(%rax) */ \
 164         .byte 0xc5, 0x78, 0x29, 0x50, 0x20; /* vmovaps %xmm10, 0x20(%rax) */ \
 165         .byte 0xc5, 0x78, 0x29, 0x48, 0x30; /* vmovaps %xmm9,  0x30(%rax) */ \
 166         .byte 0xc5, 0x78, 0x29, 0x40, 0x40; /* vmovaps %xmm8,  0x40(%rax) */ \
 167         .byte 0xc5, 0xf8, 0x29, 0x78, 0x50; /* vmovaps %xmm7,  0x50(%rax) */ \
 168         .byte 0xc5, 0xf8, 0x29, 0x70, 0x60; /* vmovaps %xmm6,  0x60(%rax) */
 169 #  define SSE_RESTORE                                                        \
 170         .byte 0xc5, 0x78, 0x28, 0x7e, 0xd0; /* vmovaps -0x30(%rsi),%xmm15 */ \
 171         .byte 0xc5, 0x78, 0x28, 0x76, 0xe0; /* vmovaps -0x20(%rsi),%xmm14 */ \
 172         .byte 0xc5, 0x78, 0x28, 0x6e, 0xf0; /* vmovaps -0x10(%rsi),%xmm13 */ \
 173         .byte 0xc5, 0x78, 0x28, 0x26;       /* vmovaps      (%rsi),%xmm12 */ \
 174         .byte 0xc5, 0x78, 0x28, 0x5e, 0x10; /* vmovaps  0x10(%rsi),%xmm11 */ \
 175         .byte 0xc5, 0x78, 0x28, 0x56, 0x20; /* vmovaps  0x20(%rsi),%xmm10 */ \
 176         .byte 0xc5, 0x78, 0x28, 0x4e, 0x30; /* vmovaps  0x30(%rsi),%xmm9  */ \
 177         .byte 0xc5, 0x78, 0x28, 0x46, 0x40; /* vmovaps  0x40(%rsi),%xmm8  */ \
 178         .byte 0xc5, 0xf8, 0x28, 0x7e, 0x50; /* vmovaps  0x50(%rsi),%xmm7  */ \
 179         .byte 0xc5, 0xf8, 0x28, 0x76, 0x60; /* vmovaps  0x60(%rsi),%xmm6  */
 180 # endif /* MOVAPS */
 181 #endif /* MS2SYSV_STUB_PREFIX */
 182 #endif /* I386_ASM_H */