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Binary.go
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Binary.go
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package instructions
import (
"github.com/iotaledger/wart/utils"
"github.com/iotaledger/wart/wasm/consts/op"
"github.com/iotaledger/wart/wasm/instructions/helper"
"math"
"math/bits"
)
type Binary struct {
Base
}
func NewBinary() helper.Instruction {
return &Binary{}
}
func (o *Binary) setRunner() {
sp := o.SP
switch o.opcode {
//@formatter:off
case op.I32_ADD : o.run = func(vm *Runner) { vm.Frame[sp].I32 += vm.Frame[sp+1].I32 }
case op.I32_SUB : o.run = func(vm *Runner) { vm.Frame[sp].I32 -= vm.Frame[sp+1].I32 }
case op.I32_MUL : o.run = func(vm *Runner) { vm.Frame[sp].I32 *= vm.Frame[sp+1].I32 }
case op.I32_DIV_S : o.run = func(vm *Runner) { i32Div(vm, sp) }
case op.I32_DIV_U : o.run = func(vm *Runner) { u32Div(vm, sp) }
case op.I32_REM_S : o.run = func(vm *Runner) { i32Rem(vm, sp) }
case op.I32_REM_U : o.run = func(vm *Runner) { u32Rem(vm, sp) }
case op.I32_AND : o.run = func(vm *Runner) { vm.Frame[sp].I32 &= vm.Frame[sp+1].I32 }
case op.I32_OR : o.run = func(vm *Runner) { vm.Frame[sp].I32 |= vm.Frame[sp+1].I32 }
case op.I32_XOR : o.run = func(vm *Runner) { vm.Frame[sp].I32 ^= vm.Frame[sp+1].I32 }
case op.I32_SHL : o.run = func(vm *Runner) { vm.Frame[sp].I32 <<= vm.Frame[sp+1].I32 }
case op.I32_SHR_S : o.run = func(vm *Runner) { vm.Frame[sp].I32 >>= vm.Frame[sp+1].I32 }
case op.I32_SHR_U : o.run = func(vm *Runner) { vm.Frame[sp].I32 = int32(uint32(vm.Frame[sp].I32) >> vm.Frame[sp+1].I32) }
case op.I32_ROTL : o.run = func(vm *Runner) { vm.Frame[sp].I32 = int32(bits.RotateLeft32(uint32(vm.Frame[sp].I32), int(vm.Frame[sp+1].I32))) }
case op.I32_ROTR : o.run = func(vm *Runner) { vm.Frame[sp].I32 = int32(bits.RotateLeft32(uint32(vm.Frame[sp].I32), -int(vm.Frame[sp+1].I32))) }
case op.I64_ADD : o.run = func(vm *Runner) { vm.Frame[sp].I64 += vm.Frame[sp+1].I64 }
case op.I64_SUB : o.run = func(vm *Runner) { vm.Frame[sp].I64 -= vm.Frame[sp+1].I64 }
case op.I64_MUL : o.run = func(vm *Runner) { vm.Frame[sp].I64 *= vm.Frame[sp+1].I64 }
case op.I64_DIV_S : o.run = func(vm *Runner) { i64Div(vm, sp) }
case op.I64_DIV_U : o.run = func(vm *Runner) { u64Div(vm, sp) }
case op.I64_REM_S : o.run = func(vm *Runner) { i64Rem(vm, sp) }
case op.I64_REM_U : o.run = func(vm *Runner) { u64Rem(vm, sp) }
case op.I64_AND : o.run = func(vm *Runner) { vm.Frame[sp].I64 &= vm.Frame[sp+1].I64 }
case op.I64_OR : o.run = func(vm *Runner) { vm.Frame[sp].I64 |= vm.Frame[sp+1].I64 }
case op.I64_XOR : o.run = func(vm *Runner) { vm.Frame[sp].I64 ^= vm.Frame[sp+1].I64 }
case op.I64_SHL : o.run = func(vm *Runner) { vm.Frame[sp].I64 <<= vm.Frame[sp+1].I64 }
case op.I64_SHR_S : o.run = func(vm *Runner) { vm.Frame[sp].I64 >>= vm.Frame[sp+1].I64 }
case op.I64_SHR_U : o.run = func(vm *Runner) { vm.Frame[sp].I64 = int64(uint64(vm.Frame[sp].I64) >> vm.Frame[sp+1].I64) }
case op.I64_ROTL : o.run = func(vm *Runner) { vm.Frame[sp].I64 = int64(bits.RotateLeft64(uint64(vm.Frame[sp].I64), int(vm.Frame[sp+1].I64))) }
case op.I64_ROTR : o.run = func(vm *Runner) { vm.Frame[sp].I64 = int64(bits.RotateLeft64(uint64(vm.Frame[sp].I64), -int(vm.Frame[sp+1].I64))) }
case op.F32_ADD : o.run = func(vm *Runner) { vm.Frame[sp].F32 += vm.Frame[sp+1].F32 }
case op.F32_SUB : o.run = func(vm *Runner) { vm.Frame[sp].F32 -= vm.Frame[sp+1].F32 }
case op.F32_MUL : o.run = func(vm *Runner) { vm.Frame[sp].F32 *= vm.Frame[sp+1].F32 }
case op.F32_DIV : o.run = func(vm *Runner) { vm.Frame[sp].F32 /= vm.Frame[sp+1].F32 }
case op.F32_MIN : o.run = func(vm *Runner) { vm.Frame[sp].F32 = float32(f64Min(float64(vm.Frame[sp].F32), float64(vm.Frame[sp+1].F32))) }
case op.F32_MAX : o.run = func(vm *Runner) { vm.Frame[sp].F32 = float32(f64Max(float64(vm.Frame[sp].F32), float64(vm.Frame[sp+1].F32))) }
case op.F32_COPYSIGN: o.run = func(vm *Runner) { vm.Frame[sp].F32 = float32(math.Copysign(float64(vm.Frame[sp].F32), float64(vm.Frame[sp+1].F32))) }
case op.F64_ADD : o.run = func(vm *Runner) { vm.Frame[sp].F64 += vm.Frame[sp+1].F64 }
case op.F64_SUB : o.run = func(vm *Runner) { vm.Frame[sp].F64 -= vm.Frame[sp+1].F64 }
case op.F64_MUL : o.run = func(vm *Runner) { vm.Frame[sp].F64 *= vm.Frame[sp+1].F64 }
case op.F64_DIV : o.run = func(vm *Runner) { vm.Frame[sp].F64 /= vm.Frame[sp+1].F64 }
case op.F64_MIN : o.run = func(vm *Runner) { vm.Frame[sp].F64 = f64Min(vm.Frame[sp].F64, vm.Frame[sp+1].F64) }
case op.F64_MAX : o.run = func(vm *Runner) { vm.Frame[sp].F64 = f64Max(vm.Frame[sp].F64, vm.Frame[sp+1].F64) }
case op.F64_COPYSIGN: o.run = func(vm *Runner) { vm.Frame[sp].F64 = math.Copysign(vm.Frame[sp].F64, vm.Frame[sp+1].F64) }
//@formatter:on
default:
panic("Invalid binary opcode")
}
}
func f64Max(x, y float64) float64 {
// special cases, order in math.Max is wrong
switch {
case math.IsNaN(x) || math.IsNaN(y):
return math.NaN()
case math.IsInf(x, 1) || math.IsInf(y, 1):
return math.Inf(1)
case x == 0 && x == y:
if math.Signbit(x) {
return y
}
return x
}
if x > y {
return x
}
return y
}
func f64Min(x, y float64) float64 {
// special cases, order in math.Min is wrong
switch {
case math.IsNaN(x) || math.IsNaN(y):
return math.NaN()
case math.IsInf(x, -1) || math.IsInf(y, -1):
return math.Inf(-1)
case x == 0 && x == y:
if math.Signbit(x) {
return x
}
return y
}
if x < y {
return x
}
return y
}
func i32Div(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I32
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
if rhs == -1 && vm.Frame[sp].I32 == -0x80000000 {
vm.Error = utils.Error("integer overflow")
return
}
vm.Frame[sp].I32 /= rhs
}
func i32Rem(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I32
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I32 %= rhs
}
func i64Div(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I64
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
if rhs == -1 && vm.Frame[sp].I64 == -0x8000000000000000 {
vm.Error = utils.Error("integer overflow")
return
}
vm.Frame[sp].I64 /= rhs
}
func i64Rem(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I64
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I64 %= rhs
}
func u32Div(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I32
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I32 = int32(uint32(vm.Frame[sp].I32) / uint32(rhs))
}
func u32Rem(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I32
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I32 = int32(uint32(vm.Frame[sp].I32) % uint32(rhs))
}
func u64Div(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I64
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I64 = int64(uint64(vm.Frame[sp].I64) / uint64(rhs))
}
func u64Rem(vm *Runner, sp int) {
rhs := vm.Frame[sp+1].I64
if rhs == 0 {
vm.Error = utils.Error("integer divide by zero")
return
}
vm.Frame[sp].I64 = int64(uint64(vm.Frame[sp].I64) % uint64(rhs))
}