gfx/cairo/libpixman/src/pixman-x86.c@b8a032363ba2 (annotated)
gfx/cairo/libpixman/src/pixman-x86.c
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright © 2000 SuSE, Inc. |
| michael@0 | 3 | * Copyright © 2007 Red Hat, Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Permission to use, copy, modify, distribute, and sell this software and its |
| michael@0 | 6 | * documentation for any purpose is hereby granted without fee, provided that |
| michael@0 | 7 | * the above copyright notice appear in all copies and that both that |
| michael@0 | 8 | * copyright notice and this permission notice appear in supporting |
| michael@0 | 9 | * documentation, and that the name of SuSE not be used in advertising or |
| michael@0 | 10 | * publicity pertaining to distribution of the software without specific, |
| michael@0 | 11 | * written prior permission. SuSE makes no representations about the |
| michael@0 | 12 | * suitability of this software for any purpose. It is provided "as is" |
| michael@0 | 13 | * without express or implied warranty. |
| michael@0 | 14 | * |
| michael@0 | 15 | * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL |
| michael@0 | 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE |
| michael@0 | 17 | * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| michael@0 | 18 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| michael@0 | 19 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| michael@0 | 20 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| michael@0 | 21 | */ |
| michael@0 | 22 | #ifdef HAVE_CONFIG_H |
| michael@0 | 23 | #include <config.h> |
| michael@0 | 24 | #endif |
| michael@0 | 25 | |
| michael@0 | 26 | #include "pixman-private.h" |
| michael@0 | 27 | |
| michael@0 | 28 | #if defined(USE_X86_MMX) || defined (USE_SSE2) |
| michael@0 | 29 | |
| michael@0 | 30 | /* The CPU detection code needs to be in a file not compiled with |
| michael@0 | 31 | * "-mmmx -msse", as gcc would generate CMOV instructions otherwise |
| michael@0 | 32 | * that would lead to SIGILL instructions on old CPUs that don't have |
| michael@0 | 33 | * it. |
| michael@0 | 34 | */ |
| michael@0 | 35 | |
| michael@0 | 36 | typedef enum |
| michael@0 | 37 | { |
| michael@0 | 38 | X86_MMX = (1 << 0), |
| michael@0 | 39 | X86_MMX_EXTENSIONS = (1 << 1), |
| michael@0 | 40 | X86_SSE = (1 << 2) | X86_MMX_EXTENSIONS, |
| michael@0 | 41 | X86_SSE2 = (1 << 3), |
| michael@0 | 42 | X86_CMOV = (1 << 4) |
| michael@0 | 43 | } cpu_features_t; |
| michael@0 | 44 | |
| michael@0 | 45 | #ifdef HAVE_GETISAX |
| michael@0 | 46 | |
| michael@0 | 47 | #include <sys/auxv.h> |
| michael@0 | 48 | |
| michael@0 | 49 | static cpu_features_t |
| michael@0 | 50 | detect_cpu_features (void) |
| michael@0 | 51 | { |
| michael@0 | 52 | cpu_features_t features = 0; |
| michael@0 | 53 | unsigned int result = 0; |
| michael@0 | 54 | |
| michael@0 | 55 | if (getisax (&result, 1)) |
| michael@0 | 56 | { |
| michael@0 | 57 | if (result & AV_386_CMOV) |
| michael@0 | 58 | features |= X86_CMOV; |
| michael@0 | 59 | if (result & AV_386_MMX) |
| michael@0 | 60 | features |= X86_MMX; |
| michael@0 | 61 | if (result & AV_386_AMD_MMX) |
| michael@0 | 62 | features |= X86_MMX_EXTENSIONS; |
| michael@0 | 63 | if (result & AV_386_SSE) |
| michael@0 | 64 | features |= X86_SSE; |
| michael@0 | 65 | if (result & AV_386_SSE2) |
| michael@0 | 66 | features |= X86_SSE2; |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | return features; |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | #else |
| michael@0 | 73 | |
| michael@0 | 74 | #define _PIXMAN_X86_64 \ |
| michael@0 | 75 | (defined(__amd64__) || defined(__x86_64__) || defined(_M_AMD64)) |
| michael@0 | 76 | |
| michael@0 | 77 | static pixman_bool_t |
| michael@0 | 78 | have_cpuid (void) |
| michael@0 | 79 | { |
| michael@0 | 80 | #if _PIXMAN_X86_64 || defined (_MSC_VER) |
| michael@0 | 81 | |
| michael@0 | 82 | return TRUE; |
| michael@0 | 83 | |
| michael@0 | 84 | #elif defined (__GNUC__) |
| michael@0 | 85 | uint32_t result; |
| michael@0 | 86 | |
| michael@0 | 87 | __asm__ volatile ( |
| michael@0 | 88 | "pushf" "\n\t" |
| michael@0 | 89 | "pop %%eax" "\n\t" |
| michael@0 | 90 | "mov %%eax, %%ecx" "\n\t" |
| michael@0 | 91 | "xor $0x00200000, %%eax" "\n\t" |
| michael@0 | 92 | "push %%eax" "\n\t" |
| michael@0 | 93 | "popf" "\n\t" |
| michael@0 | 94 | "pushf" "\n\t" |
| michael@0 | 95 | "pop %%eax" "\n\t" |
| michael@0 | 96 | "xor %%ecx, %%eax" "\n\t" |
| michael@0 | 97 | "mov %%eax, %0" "\n\t" |
| michael@0 | 98 | : "=r" (result) |
| michael@0 | 99 | : |
| michael@0 | 100 | : "%eax", "%ecx"); |
| michael@0 | 101 | |
| michael@0 | 102 | return !!result; |
| michael@0 | 103 | |
| michael@0 | 104 | #else |
| michael@0 | 105 | #error "Unknown compiler" |
| michael@0 | 106 | #endif |
| michael@0 | 107 | } |
| michael@0 | 108 | |
| michael@0 | 109 | static void |
| michael@0 | 110 | pixman_cpuid (uint32_t feature, |
| michael@0 | 111 | uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d) |
| michael@0 | 112 | { |
| michael@0 | 113 | #if defined (__GNUC__) |
| michael@0 | 114 | |
| michael@0 | 115 | #if _PIXMAN_X86_64 |
| michael@0 | 116 | __asm__ volatile ( |
| michael@0 | 117 | "cpuid" "\n\t" |
| michael@0 | 118 | : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d) |
| michael@0 | 119 | : "a" (feature)); |
| michael@0 | 120 | #else |
| michael@0 | 121 | /* On x86-32 we need to be careful about the handling of %ebx |
| michael@0 | 122 | * and %esp. We can't declare either one as clobbered |
| michael@0 | 123 | * since they are special registers (%ebx is the "PIC |
| michael@0 | 124 | * register" holding an offset to global data, %esp the |
| michael@0 | 125 | * stack pointer), so we need to make sure that %ebx is |
| michael@0 | 126 | * preserved, and that %esp has its original value when |
| michael@0 | 127 | * accessing the output operands. |
| michael@0 | 128 | */ |
| michael@0 | 129 | __asm__ volatile ( |
| michael@0 | 130 | "xchg %%ebx, %1" "\n\t" |
| michael@0 | 131 | "cpuid" "\n\t" |
| michael@0 | 132 | "xchg %%ebx, %1" "\n\t" |
| michael@0 | 133 | : "=a" (*a), "=r" (*b), "=c" (*c), "=d" (*d) |
| michael@0 | 134 | : "a" (feature)); |
| michael@0 | 135 | #endif |
| michael@0 | 136 | |
| michael@0 | 137 | #elif defined (_MSC_VER) |
| michael@0 | 138 | int info[4]; |
| michael@0 | 139 | |
| michael@0 | 140 | __cpuid (info, feature); |
| michael@0 | 141 | |
| michael@0 | 142 | *a = info[0]; |
| michael@0 | 143 | *b = info[1]; |
| michael@0 | 144 | *c = info[2]; |
| michael@0 | 145 | *d = info[3]; |
| michael@0 | 146 | #else |
| michael@0 | 147 | #error Unknown compiler |
| michael@0 | 148 | #endif |
| michael@0 | 149 | } |
| michael@0 | 150 | |
| michael@0 | 151 | static cpu_features_t |
| michael@0 | 152 | detect_cpu_features (void) |
| michael@0 | 153 | { |
| michael@0 | 154 | uint32_t a, b, c, d; |
| michael@0 | 155 | cpu_features_t features = 0; |
| michael@0 | 156 | |
| michael@0 | 157 | if (!have_cpuid()) |
| michael@0 | 158 | return features; |
| michael@0 | 159 | |
| michael@0 | 160 | /* Get feature bits */ |
| michael@0 | 161 | pixman_cpuid (0x01, &a, &b, &c, &d); |
| michael@0 | 162 | if (d & (1 << 15)) |
| michael@0 | 163 | features |= X86_CMOV; |
| michael@0 | 164 | if (d & (1 << 23)) |
| michael@0 | 165 | features |= X86_MMX; |
| michael@0 | 166 | if (d & (1 << 25)) |
| michael@0 | 167 | features |= X86_SSE; |
| michael@0 | 168 | if (d & (1 << 26)) |
| michael@0 | 169 | features |= X86_SSE2; |
| michael@0 | 170 | |
| michael@0 | 171 | /* Check for AMD specific features */ |
| michael@0 | 172 | if ((features & X86_MMX) && !(features & X86_SSE)) |
| michael@0 | 173 | { |
| michael@0 | 174 | char vendor[13]; |
| michael@0 | 175 | |
| michael@0 | 176 | /* Get vendor string */ |
| michael@0 | 177 | memset (vendor, 0, sizeof vendor); |
| michael@0 | 178 | |
| michael@0 | 179 | pixman_cpuid (0x00, &a, &b, &c, &d); |
| michael@0 | 180 | memcpy (vendor + 0, &b, 4); |
| michael@0 | 181 | memcpy (vendor + 4, &d, 4); |
| michael@0 | 182 | memcpy (vendor + 8, &c, 4); |
| michael@0 | 183 | |
| michael@0 | 184 | if (strcmp (vendor, "AuthenticAMD") == 0 || |
| michael@0 | 185 | strcmp (vendor, "Geode by NSC") == 0) |
| michael@0 | 186 | { |
| michael@0 | 187 | pixman_cpuid (0x80000000, &a, &b, &c, &d); |
| michael@0 | 188 | if (a >= 0x80000001) |
| michael@0 | 189 | { |
| michael@0 | 190 | pixman_cpuid (0x80000001, &a, &b, &c, &d); |
| michael@0 | 191 | |
| michael@0 | 192 | if (d & (1 << 22)) |
| michael@0 | 193 | features |= X86_MMX_EXTENSIONS; |
| michael@0 | 194 | } |
| michael@0 | 195 | } |
| michael@0 | 196 | } |
| michael@0 | 197 | |
| michael@0 | 198 | return features; |
| michael@0 | 199 | } |
| michael@0 | 200 | |
| michael@0 | 201 | #endif |
| michael@0 | 202 | |
| michael@0 | 203 | static pixman_bool_t |
| michael@0 | 204 | have_feature (cpu_features_t feature) |
| michael@0 | 205 | { |
| michael@0 | 206 | static pixman_bool_t initialized; |
| michael@0 | 207 | static cpu_features_t features; |
| michael@0 | 208 | |
| michael@0 | 209 | if (!initialized) |
| michael@0 | 210 | { |
| michael@0 | 211 | features = detect_cpu_features(); |
| michael@0 | 212 | initialized = TRUE; |
| michael@0 | 213 | } |
| michael@0 | 214 | |
| michael@0 | 215 | return (features & feature) == feature; |
| michael@0 | 216 | } |
| michael@0 | 217 | |
| michael@0 | 218 | #endif |
| michael@0 | 219 | |
| michael@0 | 220 | pixman_implementation_t * |
| michael@0 | 221 | _pixman_x86_get_implementations (pixman_implementation_t *imp) |
| michael@0 | 222 | { |
| michael@0 | 223 | #define MMX_BITS (X86_MMX | X86_MMX_EXTENSIONS) |
| michael@0 | 224 | #define SSE2_BITS (X86_MMX | X86_MMX_EXTENSIONS | X86_SSE | X86_SSE2) |
| michael@0 | 225 | |
| michael@0 | 226 | #ifdef USE_X86_MMX |
| michael@0 | 227 | if (!_pixman_disabled ("mmx") && have_feature (MMX_BITS)) |
| michael@0 | 228 | imp = _pixman_implementation_create_mmx (imp); |
| michael@0 | 229 | #endif |
| michael@0 | 230 | |
| michael@0 | 231 | #ifdef USE_SSE2 |
| michael@0 | 232 | if (!_pixman_disabled ("sse2") && have_feature (SSE2_BITS)) |
| michael@0 | 233 | imp = _pixman_implementation_create_sse2 (imp); |
| michael@0 | 234 | #endif |
| michael@0 | 235 | |
| michael@0 | 236 | return imp; |
| michael@0 | 237 | } |
