d992373ea7
This moves the compiler support flag out of the public package as it was only put there for tests. This also files modgen under the testing subdir so that it isn't mistaken for main code. Signed-off-by: Adrian Cole <adrian@tetrate.io>
56 lines
2.0 KiB
Go
56 lines
2.0 KiB
Go
package compiler
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import (
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"math"
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"github.com/tetratelabs/wazero/internal/wazeroir"
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)
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const isSupported = true
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// init initializes variables for the arm64 architecture
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func init() {
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newArchContext = newArchContextImpl
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}
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// archContext is embedded in callEngine in order to store architecture-specific data.
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type archContext struct {
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// compilerCallReturnAddress holds the absolute return address for nativecall.
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// The value is set whenever nativecall is executed and done in compiler_arm64.s
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// Native code can return back to the ce.execWasmFunction's main loop back by
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// executing "ret" instruction with this value. See arm64Compiler.exit.
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// Note: this is only used by Compiler code so mark this as nolint.
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compilerCallReturnAddress uint64 //nolint
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// Loading large constants in arm64 is a bit costly, so we place the following
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// consts on callEngine struct so that we can quickly access them during various operations.
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// minimum32BitSignedInt is used for overflow check for 32-bit signed division.
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// Note: this can be obtained by moving $1 and doing left-shift with 31, but it is
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// slower than directly loading from this location.
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minimum32BitSignedInt int32
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// Note: this can be obtained by moving $1 and doing left-shift with 63, but it is
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// slower than directly loading from this location.
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// minimum64BitSignedInt is used for overflow check for 64-bit signed division.
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minimum64BitSignedInt int64
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}
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// newArchContextImpl implements newArchContext for amd64 architecture.
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func newArchContextImpl() archContext {
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return archContext{
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minimum32BitSignedInt: math.MinInt32,
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minimum64BitSignedInt: math.MinInt64,
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}
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}
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func init() {
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unreservedGeneralPurposeRegisters = arm64UnreservedGeneralPurposeRegisters
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unreservedVectorRegisters = arm64UnreservedVectorRegisters
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}
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// newCompiler returns a new compiler interface which can be used to compile the given function instance.
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// Note: ir param can be nil for host functions.
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func newCompiler(ir *wazeroir.CompilationResult) (compiler, error) {
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return newArm64Compiler(ir)
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}
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