52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
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// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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package lint
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import (
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"testing"
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"sourcedock.dev/petrbalvin/gasm-sdk/arch"
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"sourcedock.dev/petrbalvin/gasm-sdk/asm"
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)
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// TestExtensionInstructionsAreKnown pins the lint side of the
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// extended-instruction layer: every mnemonic the arm64 registry carries
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// lints without unknown-instruction, and a kernel the encoder accepts lints
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// clean, because the wired layer is the acceptance rather than a gap of the
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// generated table.
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func TestExtensionInstructionsAreKnown(t *testing.T) {
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src := `#include "textflag.h"
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TEXT ·f(SB), NOSPLIT, $0
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ADD Z1.S, Z2.S, Z0.S
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SUBR Z1.S, P0/M, Z0.S
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SQADD Z0.D, Z1.D, Z2.D
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UQADD Z0.D, Z1.D, Z2.D
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SQSUB Z0.D, Z1.D, Z2.D
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UQSUB Z0.D, Z1.D, Z2.D
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SMULH Z3.D, Z4.D, Z5.D
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ADD $255, Z0.S
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MUL $-128, Z0.B
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RET
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`
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diags := lintArchFile(t, "ext_arm64.s", src, arch.ARM64, asm.AssembleFileARM64)
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for _, code := range []string{CodeUnknownInstr, CodeUnencodable} {
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if n := codes(diags)[code]; n != 0 {
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t.Errorf("%s fired %d times on the wired extension: %+v", code, n, diags)
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}
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}
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if len(diags) != 0 {
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t.Errorf("a kernel the encoder accepts must lint clean, got %+v", diags)
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}
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// The registry consult is the layer's own, not a loosening of the rule:
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// a mnemonic neither table nor registry carries still fires.
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diags = lintSrcArch(t, "ext_arm64.s", `#include "textflag.h"
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TEXT ·f(SB), NOSPLIT, $0
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FROBNICATE Z0.S, Z1.S, Z2.S
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RET
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`)
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if codes(diags)[CodeUnknownInstr] != 1 {
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t.Errorf("an unregistered mnemonic must fire unknown-instruction once: %+v", diags)
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}
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}
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