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feat(arch): the SVE2.1 narrowing two-to-one family

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Assisted-by: GLM 5.3 Flash
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petrbalvin committed 2026-10-07 20:35:41 +02:00
1 parent ee2c6d51b3
commit 31ab584eee
4 files changed
+254 -3
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arch/arm64_ext_test.go
+56
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@@ -1338,6 +1338,62 @@ func TestArm64ExtStage3Golden(t *testing.T) {
}
}
// TestArm64ExtStage4Golden pins the SVE2.1 narrowing two-to-one family
// (ZADDHNB and friends) against the toolchain-generated corpus, the same
// provenance as the families above: every row is one arm64sveenc.s line and
// the want word is that line's own encoding, with two extra vectors pinning
// the widths the corpus line does not show (.H over .B, .D over .S).
func TestArm64ExtStage4Golden(t *testing.T) {
for _, tt := range []struct {
name string
mnem string
form ExtForm
ops []ExtOperand
want uint32
}{
{"ZADDHNB Z22.S, Z10.S, Z8.H", "ZADDHNB", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b66148},
{"ZADDHNT Z22.S, Z10.S, Z8.H", "ZADDHNT", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b66548},
{"ZRADDHNB Z22.S, Z10.S, Z8.H", "ZRADDHNB", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b66948},
{"ZRADDHNT Z22.S, Z10.S, Z8.H", "ZRADDHNT", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b66d48},
{"ZRSUBHNB Z22.S, Z10.S, Z8.H", "ZRSUBHNB", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b67948},
{"ZRSUBHNT Z22.S, Z10.S, Z8.H", "ZRSUBHNT", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b67d48},
{"ZSUBHNB Z22.S, Z10.S, Z8.H", "ZSUBHNB", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b67148},
{"ZSUBHNT Z22.S, Z10.S, Z8.H", "ZSUBHNT", ExtFormNarrow,
[]ExtOperand{ExtVector(22, ExtArrS), ExtVector(10, ExtArrS), ExtVector(8, ExtArrH)},
0x45b67548},
{"ZADDHNB Z8.H, Z10.H, Z11.B", "ZADDHNB", ExtFormNarrow,
[]ExtOperand{ExtVector(8, ExtArrH), ExtVector(10, ExtArrH), ExtVector(11, ExtArrB)},
0x4568614b},
{"ZSUBHNT Z26.D, Z4.D, Z13.S", "ZSUBHNT", ExtFormNarrow,
[]ExtOperand{ExtVector(26, ExtArrD), ExtVector(4, ExtArrD), ExtVector(13, ExtArrS)},
0x45fa748d},
} {
in := extInstructionMeta(t, tt.mnem, tt.form, ExtQualNone, ExtArrNone)
got, err := in.Encode(tt.ops)
if err != nil {
t.Errorf("%s: encode: %v", tt.name, err)
continue
}
if want := hex.EncodeToString(extWordLE(tt.want)); hex.EncodeToString(got) != want {
t.Errorf("%s:\n got %x\n want %s", tt.name, got, want)
}
}
}
// extSveRow finds the gather/scatter row whose mnemonic, addressing mode,
// base size, shift and list arrangement all match.
func extSveRow(t *testing.T, mnem string, mode uint8, shift int, base, arr ExtArrangement) ExtInstr {