libgcc/config/i386/i386-asm.h

   1 /* Defines common perprocessor and assembly macros for use by various stubs.
   2    Copyright (C) 2016-2024 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
  31 #ifdef __GCC_HAVE_DWARF2_CFI_ASM
  32 # define cfi_startproc()                .cfi_startproc
  33 # define cfi_endproc()                  .cfi_endproc
  34 # define cfi_adjust_cfa_offset(X)       .cfi_adjust_cfa_offset X
  35 # define cfi_def_cfa_register(X)        .cfi_def_cfa_register X
  36 # define cfi_def_cfa(R,O)               .cfi_def_cfa R, O
  37 # define cfi_register(D,S)              .cfi_register D, S
  38 # define cfi_offset(R,O)                .cfi_offset R, O
  39 # ifdef __x86_64__
  40 #  define cfi_push(X)           .cfi_adjust_cfa_offset 8; .cfi_rel_offset X, 0
  41 #  define cfi_pop(X)            .cfi_adjust_cfa_offset -8; .cfi_restore X
  42 # else
  43 #  define cfi_push(X)           .cfi_adjust_cfa_offset 4; .cfi_rel_offset X, 0
  44 #  define cfi_pop(X)            .cfi_adjust_cfa_offset -4; .cfi_restore X
  45 # endif
  46 #else
  47 # define cfi_startproc()
  48 # define cfi_endproc()
  49 # define cfi_adjust_cfa_offset(X)
  50 # define cfi_def_cfa_register(X)
  51 # define cfi_def_cfa(R,O)
  52 # define cfi_register(D,S)
  53 # define cfi_offset(R,O)
  54 # define cfi_push(X)
  55 # define cfi_pop(X)
  56 #endif
  57
  58 #define PASTE2(a, b) PASTE2a(a, b)
  59 #define PASTE2a(a, b) a ## b
  60
  61 /* These macros currently support GNU/Linux, Solaris and Darwin.  */
  62
  63 #ifdef __ELF__
  64 # define FN_TYPE(fn) .type fn,@function
  65 # define FN_SIZE(fn) .size fn,.-fn
  66 # ifdef AS_HIDDEN_DIRECTIVE
  67 #  define FN_HIDDEN(fn) AS_HIDDEN_DIRECTIVE fn
  68 # endif
  69 #else
  70 # define FN_TYPE(fn)
  71 # define FN_SIZE(fn)
  72 #endif
  73
  74 #ifndef FN_HIDDEN
  75 # define FN_HIDDEN(fn)
  76 #endif
  77
  78 #ifdef __USER_LABEL_PREFIX__
  79 # define ASMNAME(name)          PASTE2(__USER_LABEL_PREFIX__, name)
  80 #else
  81 # define ASMNAME(name)          name
  82 #endif
  83
  84 #define FUNC_BEGIN(fn)          \
  85         .globl ASMNAME(fn);     \
  86         FN_TYPE (ASMNAME(fn));  \
  87 ASMNAME(fn):
  88
  89 #define HIDDEN_FUNC(fn)         \
  90         .globl ASMNAME(fn);     \
  91         FN_TYPE(ASMNAME(fn));   \
  92         FN_HIDDEN(ASMNAME(fn)); \
  93 ASMNAME(fn):
  94
  95 #define FUNC_END(fn) FN_SIZE(ASMNAME(fn))
  96
  97 #ifdef MS2SYSV_STUB_AVX
  98 # define MS2SYSV_STUB_PREFIX __avx_
  99 # ifdef HAVE_AS_AVX
 100 #  define MOVAPS vmovaps
 101 # endif
 102 #elif defined(MS2SYSV_STUB_SSE)
 103 # define MS2SYSV_STUB_PREFIX __sse_
 104 # define MOVAPS movaps
 105 #endif
 106
 107 #ifdef MS2SYSV_STUB_PREFIX
 108
 109 # define MS2SYSV_STUB_BEGIN(base_name) \
 110         HIDDEN_FUNC(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
 111
 112 # define MS2SYSV_STUB_END(base_name) \
 113         FUNC_END(PASTE2(MS2SYSV_STUB_PREFIX, base_name))
 114
 115 /* If expanding for sse or avx and we have assembler support.  */
 116 # ifdef MOVAPS
 117 /* Save SSE registers 6-15 using rax as the base address.  */
 118 #  define SSE_SAVE                 \
 119         MOVAPS %xmm15,-0x30(%rax); \
 120         MOVAPS %xmm14,-0x20(%rax); \
 121         MOVAPS %xmm13,-0x10(%rax); \
 122         MOVAPS %xmm12,     (%rax); \
 123         MOVAPS %xmm11, 0x10(%rax); \
 124         MOVAPS %xmm10, 0x20(%rax); \
 125         MOVAPS %xmm9,  0x30(%rax); \
 126         MOVAPS %xmm8,  0x40(%rax); \
 127         MOVAPS %xmm7,  0x50(%rax); \
 128         MOVAPS %xmm6,  0x60(%rax)
 129
 130 /* Restore SSE registers 6-15 using rsi as the base address.  */
 131 #  define SSE_RESTORE               \
 132         MOVAPS -0x30(%rsi), %xmm15; \
 133         MOVAPS -0x20(%rsi), %xmm14; \
 134         MOVAPS -0x10(%rsi), %xmm13; \
 135         MOVAPS      (%rsi), %xmm12; \
 136         MOVAPS  0x10(%rsi), %xmm11; \
 137         MOVAPS  0x20(%rsi), %xmm10; \
 138         MOVAPS  0x30(%rsi), %xmm9 ; \
 139         MOVAPS  0x40(%rsi), %xmm8 ; \
 140         MOVAPS  0x50(%rsi), %xmm7 ; \
 141         MOVAPS  0x60(%rsi), %xmm6
 142 # else /* MOVAPS */
 143 /* If the assembler doesn't support AVX then directly emit machine code
 144    for the instructions above.  */
 145 #  define SSE_SAVE                                                           \
 146         .byte 0xc5, 0x78, 0x29, 0x78, 0xd0; /* vmovaps %xmm15,-0x30(%rax) */ \
 147         .byte 0xc5, 0x78, 0x29, 0x70, 0xe0; /* vmovaps %xmm14,-0x20(%rax) */ \
 148         .byte 0xc5, 0x78, 0x29, 0x68, 0xf0; /* vmovaps %xmm13,-0x10(%rax) */ \
 149         .byte 0xc5, 0x78, 0x29, 0x20;       /* vmovaps %xmm12,     (%rax) */ \
 150         .byte 0xc5, 0x78, 0x29, 0x58, 0x10; /* vmovaps %xmm11, 0x10(%rax) */ \
 151         .byte 0xc5, 0x78, 0x29, 0x50, 0x20; /* vmovaps %xmm10, 0x20(%rax) */ \
 152         .byte 0xc5, 0x78, 0x29, 0x48, 0x30; /* vmovaps %xmm9,  0x30(%rax) */ \
 153         .byte 0xc5, 0x78, 0x29, 0x40, 0x40; /* vmovaps %xmm8,  0x40(%rax) */ \
 154         .byte 0xc5, 0xf8, 0x29, 0x78, 0x50; /* vmovaps %xmm7,  0x50(%rax) */ \
 155         .byte 0xc5, 0xf8, 0x29, 0x70, 0x60; /* vmovaps %xmm6,  0x60(%rax) */
 156 #  define SSE_RESTORE                                                        \
 157         .byte 0xc5, 0x78, 0x28, 0x7e, 0xd0; /* vmovaps -0x30(%rsi),%xmm15 */ \
 158         .byte 0xc5, 0x78, 0x28, 0x76, 0xe0; /* vmovaps -0x20(%rsi),%xmm14 */ \
 159         .byte 0xc5, 0x78, 0x28, 0x6e, 0xf0; /* vmovaps -0x10(%rsi),%xmm13 */ \
 160         .byte 0xc5, 0x78, 0x28, 0x26;       /* vmovaps      (%rsi),%xmm12 */ \
 161         .byte 0xc5, 0x78, 0x28, 0x5e, 0x10; /* vmovaps  0x10(%rsi),%xmm11 */ \
 162         .byte 0xc5, 0x78, 0x28, 0x56, 0x20; /* vmovaps  0x20(%rsi),%xmm10 */ \
 163         .byte 0xc5, 0x78, 0x28, 0x4e, 0x30; /* vmovaps  0x30(%rsi),%xmm9  */ \
 164         .byte 0xc5, 0x78, 0x28, 0x46, 0x40; /* vmovaps  0x40(%rsi),%xmm8  */ \
 165         .byte 0xc5, 0xf8, 0x28, 0x7e, 0x50; /* vmovaps  0x50(%rsi),%xmm7  */ \
 166         .byte 0xc5, 0xf8, 0x28, 0x76, 0x60; /* vmovaps  0x60(%rsi),%xmm6  */
 167 # endif /* MOVAPS */
 168 #endif /* MS2SYSV_STUB_PREFIX */
 169 #endif /* I386_ASM_H */