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Issue 329963002: Fix detection of VFP3D16 on Galaxy Tab 10.1. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 6 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/cpu.h" 5 #include "src/cpu.h"
6 6
7 #if V8_LIBC_MSVCRT 7 #if V8_LIBC_MSVCRT
8 #include <intrin.h> // __cpuid() 8 #include <intrin.h> // __cpuid()
9 #endif 9 #endif
10 #if V8_OS_POSIX 10 #if V8_OS_POSIX
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388 has_vfp3_ = (hwcaps & (HWCAP_VFPv3 | HWCAP_VFPv3D16 | HWCAP_VFPv4)) != 0; 388 has_vfp3_ = (hwcaps & (HWCAP_VFPv3 | HWCAP_VFPv3D16 | HWCAP_VFPv4)) != 0;
389 has_vfp3_d32_ = (has_vfp3_ && ((hwcaps & HWCAP_VFPv3D16) == 0 || 389 has_vfp3_d32_ = (has_vfp3_ && ((hwcaps & HWCAP_VFPv3D16) == 0 ||
390 (hwcaps & HWCAP_VFPD32) != 0)); 390 (hwcaps & HWCAP_VFPD32) != 0));
391 } else { 391 } else {
392 // Try to fallback to "Features" CPUInfo field. 392 // Try to fallback to "Features" CPUInfo field.
393 char* features = cpu_info.ExtractField("Features"); 393 char* features = cpu_info.ExtractField("Features");
394 has_idiva_ = HasListItem(features, "idiva"); 394 has_idiva_ = HasListItem(features, "idiva");
395 has_neon_ = HasListItem(features, "neon"); 395 has_neon_ = HasListItem(features, "neon");
396 has_thumbee_ = HasListItem(features, "thumbee"); 396 has_thumbee_ = HasListItem(features, "thumbee");
397 has_vfp_ = HasListItem(features, "vfp"); 397 has_vfp_ = HasListItem(features, "vfp");
398 if (HasListItem(features, "vfpv3")) { 398 if (HasListItem(features, "vfpv3d16")) {
399 has_vfp3_ = true;
400 } else if (HasListItem(features, "vfpv3")) {
399 has_vfp3_ = true; 401 has_vfp3_ = true;
400 has_vfp3_d32_ = true; 402 has_vfp3_d32_ = true;
401 } else if (HasListItem(features, "vfpv3d16")) {
402 has_vfp3_ = true;
403 } 403 }
404 delete[] features; 404 delete[] features;
405 } 405 }
406 406
407 // Some old kernels will report vfp not vfpv3. Here we make an attempt 407 // Some old kernels will report vfp not vfpv3. Here we make an attempt
408 // to detect vfpv3 by checking for vfp *and* neon, since neon is only 408 // to detect vfpv3 by checking for vfp *and* neon, since neon is only
409 // available on architectures with vfpv3. Checking neon on its own is 409 // available on architectures with vfpv3. Checking neon on its own is
410 // not enough as it is possible to have neon without vfp. 410 // not enough as it is possible to have neon without vfp.
411 if (has_vfp_ && has_neon_) { 411 if (has_vfp_ && has_neon_) {
412 has_vfp3_ = true; 412 has_vfp3_ = true;
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490 if (end == part) { 490 if (end == part) {
491 part_ = 0; 491 part_ = 0;
492 } 492 }
493 delete[] part; 493 delete[] part;
494 } 494 }
495 495
496 #endif 496 #endif
497 } 497 }
498 498
499 } } // namespace v8::internal 499 } } // namespace v8::internal
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