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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if V8_TARGET_ARCH_ARM64
#include "src/codegen/arm64/register-arm64.h"
namespace v8 {
namespace internal {
VectorFormat VectorFormatHalfWidth(VectorFormat vform) {
DCHECK(vform == kFormat8H || vform == kFormat4S || vform == kFormat2D ||
vform == kFormatH || vform == kFormatS || vform == kFormatD);
switch (vform) {
case kFormat8H:
return kFormat8B;
case kFormat4S:
return kFormat4H;
case kFormat2D:
return kFormat2S;
case kFormatH:
return kFormatB;
case kFormatS:
return kFormatH;
case kFormatD:
return kFormatS;
default:
UNREACHABLE();
}
}
VectorFormat VectorFormatDoubleWidth(VectorFormat vform) {
DCHECK(vform == kFormat8B || vform == kFormat4H || vform == kFormat2S ||
vform == kFormatB || vform == kFormatH || vform == kFormatS);
switch (vform) {
case kFormat8B:
return kFormat8H;
case kFormat4H:
return kFormat4S;
case kFormat2S:
return kFormat2D;
case kFormatB:
return kFormatH;
case kFormatH:
return kFormatS;
case kFormatS:
return kFormatD;
default:
UNREACHABLE();
}
}
VectorFormat VectorFormatFillQ(VectorFormat vform) {
switch (vform) {
case kFormatB:
case kFormat8B:
case kFormat16B:
return kFormat16B;
case kFormatH:
case kFormat4H:
case kFormat8H:
return kFormat8H;
case kFormatS:
case kFormat2S:
case kFormat4S:
return kFormat4S;
case kFormatD:
case kFormat1D:
case kFormat2D:
return kFormat2D;
default:
UNREACHABLE();
}
}
VectorFormat VectorFormatHalfWidthDoubleLanes(VectorFormat vform) {
switch (vform) {
case kFormat4H:
return kFormat8B;
case kFormat8H:
return kFormat16B;
case kFormat2S:
return kFormat4H;
case kFormat4S:
return kFormat8H;
case kFormat1D:
return kFormat2S;
case kFormat2D:
return kFormat4S;
default:
UNREACHABLE();
}
}
VectorFormat VectorFormatDoubleLanes(VectorFormat vform) {
DCHECK(vform == kFormat8B || vform == kFormat4H || vform == kFormat2S);
switch (vform) {
case kFormat8B:
return kFormat16B;
case kFormat4H:
return kFormat8H;
case kFormat2S:
return kFormat4S;
default:
UNREACHABLE();
}
}
VectorFormat VectorFormatHalfLanes(VectorFormat vform) {
DCHECK(vform == kFormat16B || vform == kFormat8H || vform == kFormat4S);
switch (vform) {
case kFormat16B:
return kFormat8B;
case kFormat8H:
return kFormat4H;
case kFormat4S:
return kFormat2S;
default:
UNREACHABLE();
}
}
VectorFormat ScalarFormatFromLaneSize(int laneSize) {
switch (laneSize) {
case 8:
return kFormatB;
case 16:
return kFormatH;
case 32:
return kFormatS;
case 64:
return kFormatD;
default:
UNREACHABLE();
}
}
VectorFormat ScalarFormatFromFormat(VectorFormat vform) {
return ScalarFormatFromLaneSize(LaneSizeInBitsFromFormat(vform));
}
unsigned RegisterSizeInBytesFromFormat(VectorFormat vform) {
return RegisterSizeInBitsFromFormat(vform) / 8;
}
unsigned RegisterSizeInBitsFromFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormatB:
return kBRegSizeInBits;
case kFormatH:
return kHRegSizeInBits;
case kFormatS:
return kSRegSizeInBits;
case kFormatD:
return kDRegSizeInBits;
case kFormat8B:
case kFormat4H:
case kFormat2S:
case kFormat1D:
return kDRegSizeInBits;
default:
return kQRegSizeInBits;
}
}
unsigned LaneSizeInBitsFromFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormatB:
case kFormat8B:
case kFormat16B:
return 8;
case kFormatH:
case kFormat4H:
case kFormat8H:
return 16;
case kFormatS:
case kFormat2S:
case kFormat4S:
return 32;
case kFormatD:
case kFormat1D:
case kFormat2D:
return 64;
default:
UNREACHABLE();
}
}
int LaneSizeInBytesFromFormat(VectorFormat vform) {
return LaneSizeInBitsFromFormat(vform) / 8;
}
int LaneSizeInBytesLog2FromFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormatB:
case kFormat8B:
case kFormat16B:
return 0;
case kFormatH:
case kFormat4H:
case kFormat8H:
return 1;
case kFormatS:
case kFormat2S:
case kFormat4S:
return 2;
case kFormatD:
case kFormat1D:
case kFormat2D:
return 3;
default:
UNREACHABLE();
}
}
int LaneCountFromFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormat16B:
return 16;
case kFormat8B:
case kFormat8H:
return 8;
case kFormat4H:
case kFormat4S:
return 4;
case kFormat2S:
case kFormat2D:
return 2;
case kFormat1D:
case kFormatB:
case kFormatH:
case kFormatS:
case kFormatD:
return 1;
default:
UNREACHABLE();
}
}
int MaxLaneCountFromFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormatB:
case kFormat8B:
case kFormat16B:
return 16;
case kFormatH:
case kFormat4H:
case kFormat8H:
return 8;
case kFormatS:
case kFormat2S:
case kFormat4S:
return 4;
case kFormatD:
case kFormat1D:
case kFormat2D:
return 2;
default:
UNREACHABLE();
}
}
// Does 'vform' indicate a vector format or a scalar format?
bool IsVectorFormat(VectorFormat vform) {
DCHECK_NE(vform, kFormatUndefined);
switch (vform) {
case kFormatB:
case kFormatH:
case kFormatS:
case kFormatD:
return false;
default:
return true;
}
}
int64_t MaxIntFromFormat(VectorFormat vform) {
return INT64_MAX >> (64 - LaneSizeInBitsFromFormat(vform));
}
int64_t MinIntFromFormat(VectorFormat vform) {
return INT64_MIN >> (64 - LaneSizeInBitsFromFormat(vform));
}
uint64_t MaxUintFromFormat(VectorFormat vform) {
return UINT64_MAX >> (64 - LaneSizeInBitsFromFormat(vform));
}
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_ARM64
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