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cgen: support closures on arm64 (#12863)

pull/12868/head
spaceface 2021-12-16 17:02:05 +01:00 committed by GitHub
parent 8a34fb7857
commit c6b902d2b7
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 36 additions and 3 deletions
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10
cmd/tools/vtest-self.v
View File

@ -130,7 +130,10 @@ const (
skip_on_amd64 = [
'do_not_remove',
]
skip_on_non_amd64 = [
skip_on_arm64 = [
'do_not_remove',
]
skip_on_non_amd64_or_arm64 = [
// closures aren't implemented yet:
'vlib/v/tests/closure_test.v',
'vlib/context/cancel_test.v',
@ -232,12 +235,15 @@ fn main() {
if os.getenv('V_CI_UBUNTU_MUSL').len > 0 {
tsession.skip_files << skip_on_ubuntu_musl
}
$if !amd64 {
$if !amd64 && !arm64 {
tsession.skip_files << skip_on_non_amd64
}
$if amd64 {
tsession.skip_files << skip_on_amd64
}
$if arm64 {
tsession.skip_files << skip_on_arm64
}
$if !linux {
tsession.skip_files << skip_on_non_linux
}

29
vlib/v/gen/c/cheaders.v
View File

@ -58,6 +58,15 @@ static inline void __sort_ptr(uintptr_t a[], bool b[], int l) {
}
'
fn arm_bytes(nargs int) string {
// start:
// ldr x16, start-0x08
// ldr x<REG>, start-0x10
// br x16
bytes := '0xd0, 0xff, 0xff, 0x58, 0x6<REG>, 0xff, 0xff, 0x58, 0x00, 0x02, 0x1f, 0xd6'
return bytes.replace('<REG>', nargs.str())
}
// Heavily based on Chris Wellons's work
// https://nullprogram.com/blog/2017/01/08/
@ -65,7 +74,7 @@ fn c_closure_helpers(pref &pref.Preferences) string {
if pref.os == .windows {
verror('closures are not implemented on Windows yet')
}
if pref.arch != .amd64 {
if pref.arch !in [.amd64, .arm64] {
verror('closures are not implemented on this architecture yet: $pref.arch')
}
mut builder := strings.new_builder(2048)
@ -95,6 +104,24 @@ static unsigned char __closure_thunk[6][13] = {
0xff, 0x25, 0xeb, 0xff, 0xff, 0xff
},
};
')
} else if pref.arch == .arm64 {
builder.write_string('
static unsigned char __closure_thunk[6][12] = {
{
${arm_bytes(0)}
}, {
${arm_bytes(1)}
}, {
${arm_bytes(2)}
}, {
${arm_bytes(3)}
}, {
${arm_bytes(4)}
}, {
${arm_bytes(5)}
},
};
')
}
builder.write_string('