ifeq ($(vtunejit), on)
GYPFLAGS += -Dv8_enable_vtunejit=1
endif
-# vfp2=off
-ifeq ($(vfp2), off)
- GYPFLAGS += -Dv8_can_use_vfp2_instructions=false
-else
- GYPFLAGS += -Dv8_can_use_vfp2_instructions=true -Darm_fpu=vfpv2
-endif
-# vfp3=off
-ifeq ($(vfp3), off)
- GYPFLAGS += -Dv8_can_use_vfp3_instructions=false
-else
- GYPFLAGS += -Dv8_can_use_vfp3_instructions=true -Darm_fpu=vfpv3
-endif
# debuggersupport=off
ifeq ($(debuggersupport), off)
GYPFLAGS += -Dv8_enable_debugger_support=0
endif
+# unalignedaccess=on
+ifeq ($(unalignedaccess), on)
+ GYPFLAGS += -Dv8_can_use_unaligned_accesses=true
+endif
# soname_version=1.2.3
ifdef soname_version
GYPFLAGS += -Dsoname_version=$(soname_version)
ifeq ($(regexp), interpreted)
GYPFLAGS += -Dv8_interpreted_regexp=1
endif
-# hardfp=on
-ifeq ($(hardfp), on)
- GYPFLAGS += -Dv8_use_arm_eabi_hardfloat=true
-endif
-# armv7=false
+# arm specific flags.
+# armv7=false/true
ifeq ($(armv7), false)
GYPFLAGS += -Darmv7=0
+else
+ifeq ($(armv7), true)
+ GYPFLAGS += -Darmv7=1
+else
+ GYPFLAGS += -Darmv7=default
+endif
+endif
+# vfp2=off. Deprecated, use armfpu=
+# vfp3=off. Deprecated, use armfpu=
+ifeq ($(vfp3), off)
+ GYPFLAGS += -Darm_fpu=vfp
+endif
+# hardfp=on/off. Deprecated, use armfloatabi
+ifeq ($(hardfp),on)
+ GYPFLAGS += -Darm_float_abi=hard
+else
+ifeq ($(hardfp),off)
+ GYPFLAGS += -Darm_float_abi=softfp
+endif
+endif
+# armneon=on/off
+ifeq ($(armneon), on)
+ GYPFLAGS += -Darm_neon=1
+endif
+# fpu: armfpu=xxx
+# xxx: vfp, vfpv3-d16, vfpv3, neon.
+ifeq ($(armfpu),)
+ifneq ($(vfp3), off)
+ GYPFLAGS += -Darm_fpu=default
+endif
+else
+ GYPFLAGS += -Darm_fpu=$(armfpu)
+endif
+# float abi: armfloatabi=softfp/hard
+ifeq ($(armfloatabi),)
+ifeq ($(hardfp),)
+ GYPFLAGS += -Darm_float_abi=default
+endif
+else
+ GYPFLAGS += -Darm_float_abi=$(armfloatabi)
+endif
+# armthumb=on/off
+ifeq ($(armthumb), off)
+ GYPFLAGS += -Darm_thumb=0
+else
+ifeq ($(armthumb), on)
+ GYPFLAGS += -Darm_thumb=1
+else
+ GYPFLAGS += -Darm_thumb=default
+endif
+endif
+# armtest=on
+# With this flag set, by default v8 will only use features implied
+# by the compiler (no probe). This is done by modifying the default
+# values of enable_armv7, enable_vfp2, enable_vfp3 and enable_32dregs.
+# Modifying these flags when launching v8 will enable the probing for
+# the specified values.
+# When using the simulator, this flag is implied.
+ifeq ($(armtest), on)
+ GYPFLAGS += -Darm_test=on
+else
+ GYPFLAGS += -Darm_test=off
endif
# ----------------- available targets: --------------------
'defines': [
'V8_TARGET_ARCH_ARM',
],
+ 'variables': {
+ 'armsimulator': '<!($(echo <(CXX)) -v 2>&1 | grep -q "^Target: arm" && echo "no" || echo "yes")',
+ },
'conditions': [
- ['armv7==1', {
- 'defines': [
- 'CAN_USE_ARMV7_INSTRUCTIONS=1',
- ],
- }],
[ 'v8_can_use_unaligned_accesses=="true"', {
'defines': [
'CAN_USE_UNALIGNED_ACCESSES=1',
],
- }],
- [ 'v8_can_use_unaligned_accesses=="false"', {
+ }, {
'defines': [
'CAN_USE_UNALIGNED_ACCESSES=0',
],
}],
- # NEON implies VFP3 and VFP3 implies VFP2.
- [ 'v8_can_use_vfp2_instructions=="true" or arm_neon==1 or \
- arm_fpu=="vfpv3" or arm_fpu=="vfpv3-d16"', {
- 'defines': [
- 'CAN_USE_VFP2_INSTRUCTIONS',
- ],
- }],
- # NEON implies VFP3.
- [ 'v8_can_use_vfp3_instructions=="true" or arm_neon==1 or \
- arm_fpu=="vfpv3" or arm_fpu=="vfpv3-d16"', {
- 'defines': [
- 'CAN_USE_VFP3_INSTRUCTIONS',
- ],
- }],
- [ 'v8_use_arm_eabi_hardfloat=="true"', {
- 'defines': [
- 'USE_EABI_HARDFLOAT=1',
- 'CAN_USE_VFP2_INSTRUCTIONS',
- ],
+ ['armsimulator=="no"', {
'target_conditions': [
['_toolset=="target"', {
- 'cflags': ['-mfloat-abi=hard',],
+ 'conditions': [
+ [ 'armv7==1', {
+ 'cflags': ['-march=armv7-a',],
+ }],
+ [ 'armv7==1 or armv7=="default"', {
+ 'conditions': [
+ [ 'arm_neon==1', {
+ 'cflags': ['-mfpu=neon',],
+ },
+ {
+ 'conditions': [
+ [ 'arm_fpu!="default"', {
+ 'cflags': ['-mfpu=<(arm_fpu)',],
+ }],
+ ]
+ }],
+ ]
+ }],
+ [ 'arm_float_abi!="default"', {
+ 'cflags': ['-mfloat-abi=<(arm_float_abi)',],
+ }],
+ [ 'arm_thumb==1', {
+ 'cflags': ['-mthumb',],
+ }],
+ [ 'arm_thumb==0', {
+ 'cflags': ['-marm',],
+ }],
+ ],
}],
],
- }, {
- 'defines': [
- 'USE_EABI_HARDFLOAT=0',
+ 'conditions': [
+ [ 'arm_test=="on"', {
+ 'defines': [
+ 'ARM_TEST',
+ ],
+ }],
],
}],
- [ 'v8_can_use_vfp32dregs=="true"', {
+ ['armsimulator=="yes"', {
'defines': [
- 'CAN_USE_VFP32DREGS',
+ 'ARM_TEST',
],
+ 'conditions': [
+ [ 'armv7==1 or armv7=="default"', {
+ 'defines': [
+ 'CAN_USE_ARMV7_INSTRUCTIONS=1',
+ ],
+ 'conditions': [
+ [ 'arm_fpu=="default"', {
+ 'defines': [
+ 'CAN_USE_VFP3_INSTRUCTIONS',
+ ],
+ }],
+ [ 'arm_fpu=="vfpv3-d16"', {
+ 'defines': [
+ 'CAN_USE_VFP3_INSTRUCTIONS',
+ ],
+ }],
+ [ 'arm_fpu=="vfpv3"', {
+ 'defines': [
+ 'CAN_USE_VFP3_INSTRUCTIONS',
+ 'CAN_USE_VFP32DREGS',
+ ],
+ }],
+ [ 'arm_fpu=="neon" or arm_neon==1', {
+ 'defines': [
+ 'CAN_USE_VFP3_INSTRUCTIONS',
+ 'CAN_USE_VFP32DREGS',
+ ],
+ }],
+ ],
+ }],
+ [ 'arm_float_abi=="hard"', {
+ 'defines': [
+ 'USE_EABI_HARDFLOAT=1',
+ ],
+ }],
+ [ 'arm_float_abi=="softfp" or arm_float_abi=="default"', {
+ 'defines': [
+ 'USE_EABI_HARDFLOAT=0',
+ ],
+ }],
+ ]
}],
],
}], # v8_target_arch=="arm"
static unsigned CpuFeaturesImpliedByCompiler() {
unsigned answer = 0;
#ifdef CAN_USE_ARMV7_INSTRUCTIONS
- answer |= 1u << ARMv7;
+ if (FLAG_enable_armv7) {
+ answer |= 1u << ARMv7;
+ }
#endif // CAN_USE_ARMV7_INSTRUCTIONS
#ifdef CAN_USE_VFP3_INSTRUCTIONS
- answer |= 1u << VFP3 | 1u << ARMv7;
+ if (FLAG_enable_vfp3) {
+ answer |= 1u << VFP3 | 1u << ARMv7;
+ }
#endif // CAN_USE_VFP3_INSTRUCTIONS
#ifdef CAN_USE_VFP32DREGS
- answer |= 1u << VFP32DREGS;
+ if (FLAG_enable_32dregs) {
+ answer |= 1u << VFP32DREGS;
+ }
#endif // CAN_USE_VFP32DREGS
-
-#ifdef __arm__
- // If the compiler is allowed to use VFP then we can use VFP too in our code
- // generation even when generating snapshots. ARMv7 and hardware floating
- // point support implies VFPv3, see ARM DDI 0406B, page A1-6.
-#if defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(__VFP_FP__) \
- && !defined(__SOFTFP__)
- answer |= 1u << VFP3 | 1u << ARMv7;
-#endif // defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(__VFP_FP__)
- // && !defined(__SOFTFP__)
-#endif // _arm__
- if (answer & (1u << ARMv7)) {
+ if ((answer & (1u << ARMv7)) && FLAG_enable_unaligned_accesses) {
answer |= 1u << UNALIGNED_ACCESSES;
}
if (Serializer::enabled()) {
// No probing for features if we might serialize (generate snapshot).
+ printf(" ");
+ PrintFeatures();
return;
}
supported_ |= static_cast<uint64_t>(1) << VFP32DREGS;
}
+ if (FLAG_enable_unaligned_accesses) {
+ supported_ |= static_cast<uint64_t>(1) << UNALIGNED_ACCESSES;
+ }
+
#else // __arm__
// Probe for additional features not already known to be available.
- if (!IsSupported(VFP3) && OS::ArmCpuHasFeature(VFP3)) {
+ if (!IsSupported(VFP3) && FLAG_enable_vfp3 && OS::ArmCpuHasFeature(VFP3)) {
// This implementation also sets the VFP flags if runtime
// detection of VFP returns true. VFPv3 implies ARMv7, see ARM DDI
// 0406B, page A1-6.
static_cast<uint64_t>(1) << ARMv7;
}
- if (!IsSupported(ARMv7) && OS::ArmCpuHasFeature(ARMv7)) {
+ if (!IsSupported(ARMv7) && FLAG_enable_armv7 && OS::ArmCpuHasFeature(ARMv7)) {
found_by_runtime_probing_only_ |= static_cast<uint64_t>(1) << ARMv7;
}
- if (!IsSupported(SUDIV) && OS::ArmCpuHasFeature(SUDIV)) {
+ if (!IsSupported(SUDIV) && FLAG_enable_sudiv && OS::ArmCpuHasFeature(SUDIV)) {
found_by_runtime_probing_only_ |= static_cast<uint64_t>(1) << SUDIV;
}
- if (!IsSupported(UNALIGNED_ACCESSES) && OS::ArmCpuHasFeature(ARMv7)) {
+ if (!IsSupported(UNALIGNED_ACCESSES) && FLAG_enable_unaligned_accesses
+ && OS::ArmCpuHasFeature(ARMv7)) {
found_by_runtime_probing_only_ |=
static_cast<uint64_t>(1) << UNALIGNED_ACCESSES;
}
if (OS::GetCpuImplementer() == QUALCOMM_IMPLEMENTER &&
- OS::ArmCpuHasFeature(ARMv7)) {
+ FLAG_enable_movw_movt && OS::ArmCpuHasFeature(ARMv7)) {
found_by_runtime_probing_only_ |=
static_cast<uint64_t>(1) << MOVW_MOVT_IMMEDIATE_LOADS;
}
- if (!IsSupported(VFP32DREGS) && OS::ArmCpuHasFeature(VFP32DREGS)) {
+ if (!IsSupported(VFP32DREGS) && FLAG_enable_32dregs
+ && OS::ArmCpuHasFeature(VFP32DREGS)) {
found_by_runtime_probing_only_ |= static_cast<uint64_t>(1) << VFP32DREGS;
}
}
+void CpuFeatures::PrintTarget() {
+ const char* arm_arch = NULL;
+ const char* arm_test = "";
+ const char* arm_fpu = "";
+ const char* arm_thumb = "";
+ const char* arm_float_abi = NULL;
+
+#if defined CAN_USE_ARMV7_INSTRUCTIONS
+ arm_arch = "arm v7";
+#else
+ arm_arch = "arm v6";
+#endif
+
+#ifdef __arm__
+
+# ifdef ARM_TEST
+ arm_test = " test";
+# endif
+# if defined __ARM_NEON__
+ arm_fpu = " neon";
+# elif defined CAN_USE_VFP3_INSTRUCTIONS
+ arm_fpu = " vfp3";
+# else
+ arm_fpu = " vfp2";
+# endif
+# if (defined __thumb__) || (defined __thumb2__)
+ arm_thumb = " thumb";
+# endif
+ arm_float_abi = OS::ArmUsingHardFloat() ? "hard" : "softfp";
+
+#else // __arm__
+
+ arm_test = " simulator";
+# if defined CAN_USE_VFP3_INSTRUCTIONS
+# if defined CAN_USE_VFP32DREGS
+ arm_fpu = " vfp3";
+# else
+ arm_fpu = " vfp3-d16";
+# endif
+# else
+ arm_fpu = " vfp2";
+# endif
+# if USE_EABI_HARDFLOAT == 1
+ arm_float_abi = "hard";
+# else
+ arm_float_abi = "softfp";
+# endif
+
+#endif // __arm__
+
+ printf("target%s %s%s%s %s\n",
+ arm_test, arm_arch, arm_fpu, arm_thumb, arm_float_abi);
+}
+
+
+void CpuFeatures::PrintFeatures() {
+ printf(
+ "ARMv7=%d VFP3=%d VFP32DREGS=%d SUDIV=%d UNALIGNED_ACCESSES=%d "
+ "MOVW_MOVT_IMMEDIATE_LOADS=%d",
+ CpuFeatures::IsSupported(ARMv7),
+ CpuFeatures::IsSupported(VFP3),
+ CpuFeatures::IsSupported(VFP32DREGS),
+ CpuFeatures::IsSupported(SUDIV),
+ CpuFeatures::IsSupported(UNALIGNED_ACCESSES),
+ CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS));
+#ifdef __arm__
+ printf(" USE_EABI_HARDFLOAT=%d\n", OS::ArmUsingHardFloat());
+#else
+ printf(" USE_EABI_HARDFLOAT=%d\n", USE_EABI_HARDFLOAT);
+#endif
+}
+
+
// -----------------------------------------------------------------------------
// Implementation of RelocInfo
// is enabled (snapshots must be portable).
static void Probe();
+ // Display target use when compiling.
+ static void PrintTarget();
+
+ // Display features.
+ static void PrintFeatures();
+
// Check whether a feature is supported by the target CPU.
static bool IsSupported(CpuFeature f) {
ASSERT(initialized_);
- if (f == VFP3 && !FLAG_enable_vfp3) return false;
- if (f == SUDIV && !FLAG_enable_sudiv) return false;
- if (f == UNALIGNED_ACCESSES && !FLAG_enable_unaligned_accesses) {
- return false;
- }
- if (f == VFP32DREGS && !FLAG_enable_32dregs) return false;
return (supported_ & (1u << f)) != 0;
}
defined(__ARM_ARCH_7R__) || \
defined(__ARM_ARCH_7__)
# define CAN_USE_ARMV7_INSTRUCTIONS 1
+# define CAN_USE_VFP3_INSTRUCTIONS
#endif
-#if defined(__ARM_ARCH_6__) || \
- defined(__ARM_ARCH_6J__) || \
- defined(__ARM_ARCH_6K__) || \
- defined(__ARM_ARCH_6Z__) || \
+#if defined(__ARM_ARCH_6__) || \
+ defined(__ARM_ARCH_6J__) || \
+ defined(__ARM_ARCH_6K__) || \
+ defined(__ARM_ARCH_6Z__) || \
defined(__ARM_ARCH_6ZK__) || \
defined(__ARM_ARCH_6T2__) || \
defined(CAN_USE_ARMV7_INSTRUCTIONS)
# define CAN_USE_ARMV6_INSTRUCTIONS 1
#endif
-#if defined(__ARM_ARCH_5T__) || \
- defined(__ARM_ARCH_5TE__) || \
- defined(__ARM_ARCH_5TEJ__) || \
+#if defined(__ARM_ARCH_5__) || \
+ defined(__ARM_ARCH_5T__) || \
+ defined(__ARM_ARCH_5TE__) || \
+ defined(__ARM_ARCH_5TEJ__) || \
defined(CAN_USE_ARMV6_INSTRUCTIONS)
# define CAN_USE_ARMV5_INSTRUCTIONS 1
# define CAN_USE_THUMB_INSTRUCTIONS 1
// EABI variant for double arguments in use.
bool use_eabi_hardfloat() {
-#if USE_EABI_HARDFLOAT
+#ifdef __arm__
+ return OS::ArmUsingHardFloat();
+#elif USE_EABI_HARDFLOAT
return true;
#else
return false;
};
#endif
+#if (defined CAN_USE_VFP3_INSTRUCTIONS) || !(defined ARM_TEST)
+# define ENABLE_VFP3_DEFAULT true
+#else
+# define ENABLE_VFP3_DEFAULT false
+#endif
+#if (defined CAN_USE_ARMV7_INSTRUCTIONS) || !(defined ARM_TEST)
+# define ENABLE_ARMV7_DEFAULT true
+#else
+# define ENABLE_ARMV7_DEFAULT false
+#endif
+#if (defined CAN_USE_VFP32DREGS) || !(defined ARM_TEST)
+# define ENABLE_32DREGS_DEFAULT true
+#else
+# define ENABLE_32DREGS_DEFAULT false
+#endif
+
#define DEFINE_bool(nam, def, cmt) FLAG(BOOL, bool, nam, def, cmt)
#define DEFINE_int(nam, def, cmt) FLAG(INT, int, nam, def, cmt)
#define DEFINE_float(nam, def, cmt) FLAG(FLOAT, double, nam, def, cmt)
"enable use of RDTSC instruction if available")
DEFINE_bool(enable_sahf, true,
"enable use of SAHF instruction if available (X64 only)")
-DEFINE_bool(enable_vfp3, true,
+DEFINE_bool(enable_vfp3, ENABLE_VFP3_DEFAULT,
"enable use of VFP3 instructions if available")
-DEFINE_bool(enable_armv7, true,
+DEFINE_bool(enable_armv7, ENABLE_ARMV7_DEFAULT,
"enable use of ARMv7 instructions if available (ARM only)")
DEFINE_bool(enable_sudiv, true,
"enable use of SDIV and UDIV instructions if available (ARM only)")
"instruction pairs (ARM only)")
DEFINE_bool(enable_unaligned_accesses, true,
"enable unaligned accesses for ARMv7 (ARM only)")
-DEFINE_bool(enable_32dregs, true,
+DEFINE_bool(enable_32dregs, ENABLE_32DREGS_DEFAULT,
"enable use of d16-d31 registers on ARM - this requires VFP3")
DEFINE_bool(enable_vldr_imm, false,
"enable use of constant pools for double immediate (ARM only)")
#include "smart-pointers.h"
#include "string-stream.h"
+#ifdef V8_TARGET_ARCH_ARM
+#include "arm/assembler-arm-inl.h"
+#endif
namespace v8 {
namespace internal {
// static
void FlagList::PrintHelp() {
+#ifdef V8_TARGET_ARCH_ARM
+ CpuFeatures::PrintTarget();
+ CpuFeatures::Probe();
+ CpuFeatures::PrintFeatures();
+#endif // V8_TARGET_ARCH_ARM
+
printf("Usage:\n");
printf(" shell [options] -e string\n");
printf(" execute string in V8\n");
uint64_t seed = Ticks() ^ (getpid() << 16);
srandom(static_cast<unsigned int>(seed));
limit_mutex = CreateMutex();
-
-#ifdef __arm__
- // When running on ARM hardware check that the EABI used by V8 and
- // by the C code is the same.
- bool hard_float = OS::ArmUsingHardFloat();
- if (hard_float) {
-#if !USE_EABI_HARDFLOAT
- PrintF("ERROR: Binary compiled with -mfloat-abi=hard but without "
- "-DUSE_EABI_HARDFLOAT\n");
- exit(1);
-#endif
- } else {
-#if USE_EABI_HARDFLOAT
- PrintF("ERROR: Binary not compiled with -mfloat-abi=hard but with "
- "-DUSE_EABI_HARDFLOAT\n");
- exit(1);
-#endif
- }
-#endif
}
'--logfile', '<(INTERMEDIATE_DIR)/snapshot.log',
],
},
- 'conditions': [
- ['v8_target_arch=="arm"', {
- # The following rules should be consistent with chromium's
- # common.gypi and V8's runtime rule to ensure they all generate
- # the same correct machine code. The following issue is about
- # V8's runtime rule about vfpv3 and neon:
- # http://code.google.com/p/v8/issues/detail?id=914
- 'conditions': [
- ['armv7==1', {
- # The ARM Architecture Manual mandates VFPv3 if NEON is
- # available.
- # V8 does not use d16-d31 unless explicitly enabled
- # (--enable_32dregs) or detected at run-time, so for vfpv3-d16,
- # we can also enable vfp3 for the better performance.
- 'conditions': [
- ['arm_neon!=1 and arm_fpu!="vfpv3" and arm_fpu!="vfpv3-d16"', {
- 'variables': {
- 'mksnapshot_flags': [
- '--noenable_vfp3',
- ],
- },
- }],
- ],
- },{ # else: armv7!=1
- 'variables': {
- 'mksnapshot_flags': [
- '--noenable_armv7',
- '--noenable_vfp3',
- ],
- },
- }],
- ],
- }],
- ],
'action': [
'<@(_inputs)',
'<@(mksnapshot_flags)',
projects / platform / upstream / v8.git / commitdiff