compiler(arm64): fixes B.cond offset limits (#2183)

mathetake · web-flow · commit 378956d2fd5c · 2024-04-15T14:20:05.000+09:00
Signed-off-by: Takeshi Yoneda &lt;t.y.mathetake@gmail.com&gt;
diff --git a/internal/engine/wazevo/backend/isa/arm64/machine.go b/internal/engine/wazevo/backend/isa/arm64/machine.go
@@ -391,8 +391,8 @@ const (
 	maxSignedInt26 = 1<<25 - 1
 	minSignedInt26 = -(1 << 25)
 
-	maxSignedInt19 = 1<<19 - 1
-	minSignedInt19 = -(1 << 19)
+	maxSignedInt19 = 1<<18 - 1
+	minSignedInt19 = -(1 << 18)
 )
 
 func (m *machine) insertConditionalJumpTrampoline(cbr *instruction, currentBlk *labelPosition, nextLabel label) {

Original file line number	Diff line number	Diff line change
`@@ -391,8 +391,8 @@ const (`
`391`	`391`	`maxSignedInt26 = 1<<25 - 1`
`392`	`392`	`minSignedInt26 = -(1 << 25)`
`393`	`393`
`394`		`- maxSignedInt19 = 1<<19 - 1`
`395`		`- minSignedInt19 = -(1 << 19)`
	`394`	`+ maxSignedInt19 = 1<<18 - 1`
	`395`	`+ minSignedInt19 = -(1 << 18)`
`396`	`396`	`)`
`397`	`397`
`398`	`398`	`func (m machine) insertConditionalJumpTrampoline(cbr instruction, currentBlk *labelPosition, nextLabel label) {`