63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
// 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-devkit/asm"
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)
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func TestUnencodableInstruction(t *testing.T) {
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// MOVBE is a real x86 instruction the architecture table knows about;
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// before the encoder grows it, lint must flag the gap at edit time.
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diags := lintSrc(t, `
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#include "textflag.h"
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TEXT ·f(SB), NOSPLIT, $0
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MOVQ AX, BX
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RET
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`)
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if codes(diags)[CodeUnencodable] != 0 {
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t.Fatalf("encodable instructions must not be flagged: %+v", diags)
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}
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// A mnemonic that is neither in the table nor encodable fires
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// unknown-instruction, not unencodable.
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diags = lintSrc(t, `
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#include "textflag.h"
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TEXT ·f(SB), NOSPLIT, $0
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FROBNICATE AX, BX
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RET
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`)
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if codes(diags)[CodeUnencodable] != 0 || codes(diags)[CodeUnknownInstr] != 1 {
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t.Fatalf("unknown instruction must fire unknown-instruction only: %+v", diags)
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}
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}
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func TestEncodableMirror(t *testing.T) {
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// Spot-check the predicate against instructions from every dispatch
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// family of the encoder.
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yes := []string{
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"RET", "NOP", "CALL", "JMP", "JEQ", "JLT",
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"MOVQ", "MOVL", "ADDQ", "CMPQ", "LEAQ", "TESTL",
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"NOTL", "DECL", "SHRQ", "IMULQ", "PUSHQ", "POPQ",
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"BSWAPL", "TZCNTQ", "MOVBLZX", "MOVOU", "MOVSD",
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"PREFETCHT0", "PREFETCHNTA",
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"VMOVDQU", "VPCMPUB", "VPCOMPRESSD", "VPERMB", "VPGATHERDD", "VPSCATTERDD",
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"KMOVQ", "KANDNW", "VPMOVMSKB",
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"CMOVLGT", "SETNE", "PSHUFB", "PADDB",
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}
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for _, m := range yes {
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if !asm.Encodable(m) {
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t.Errorf("Encodable(%q) = false, want true", m)
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}
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}
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no := []string{"FROBNICATE", "MOVXX", "CMOVXX", "SETXX"}
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for _, m := range no {
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if asm.Encodable(m) {
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t.Errorf("Encodable(%q) = true, want false", m)
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}
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}
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}
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