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compiler: make toShortForm accept an opcode

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This commit is contained in:
Evgenii Stratonikov 2020-08-23 13:56:55 +03:00
parent 1be1b8de9e
commit 4d04c56efb
1 changed files with 14 additions and 14 deletions
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28
pkg/compiler/codegen.go
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@ -1699,13 +1699,13 @@ func shortenJumps(b []byte, offsets []int) []byte {
// 2. Convert instructions. // 2. Convert instructions.
copyOffset := 0 copyOffset := 0
l := len(offsets) l := len(offsets)
b[offsets[0]] = toShortForm(b[offsets[0]]) b[offsets[0]] = byte(toShortForm(opcode.Opcode(b[offsets[0]])))
for i := 0; i < l; i++ { for i := 0; i < l; i++ {
start := offsets[i] + 2 start := offsets[i] + 2
end := len(b) end := len(b)
if i != l-1 { if i != l-1 {
end = offsets[i+1] + 2 end = offsets[i+1] + 2
b[offsets[i+1]] = toShortForm(b[offsets[i+1]]) b[offsets[i+1]] = byte(toShortForm(opcode.Opcode(b[offsets[i+1]])))
} }
copy(b[start-copyOffset:], b[start+3:end]) copy(b[start-copyOffset:], b[start+3:end])
copyOffset += longToShortRemoveCount copyOffset += longToShortRemoveCount
@ -1731,28 +1731,28 @@ func calcOffsetCorrection(ip, target int, offsets []int) int {
return cnt return cnt
} }
func toShortForm(b byte) byte { func toShortForm(op opcode.Opcode) opcode.Opcode {
switch op := opcode.Opcode(b); op { switch op {
case opcode.JMPL: case opcode.JMPL:
return byte(opcode.JMP) return opcode.JMP
case opcode.JMPIFL: case opcode.JMPIFL:
return byte(opcode.JMPIF) return opcode.JMPIF
case opcode.JMPIFNOTL: case opcode.JMPIFNOTL:
return byte(opcode.JMPIFNOT) return opcode.JMPIFNOT
case opcode.JMPEQL: case opcode.JMPEQL:
return byte(opcode.JMPEQ) return opcode.JMPEQ
case opcode.JMPNEL: case opcode.JMPNEL:
return byte(opcode.JMPNE) return opcode.JMPNE
case opcode.JMPGTL: case opcode.JMPGTL:
return byte(opcode.JMPGT) return opcode.JMPGT
case opcode.JMPGEL: case opcode.JMPGEL:
return byte(opcode.JMPGE) return opcode.JMPGE
case opcode.JMPLEL: case opcode.JMPLEL:
return byte(opcode.JMPLE) return opcode.JMPLE
case opcode.JMPLTL: case opcode.JMPLTL:
return byte(opcode.JMPLT) return opcode.JMPLT
case opcode.CALLL: case opcode.CALLL:
return byte(opcode.CALL) return opcode.CALL
default: default:
panic(fmt.Errorf("invalid opcode: %s", op)) panic(fmt.Errorf("invalid opcode: %s", op))
} }