56 lines
1.8 KiB
Go
56 lines
1.8 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 asm
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import "testing"
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// amd64XsaveCorpus holds every line the Go toolchain's own
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// amd64enc.s carries for the XSAVE family (XSAVE, XSAVEOPT, XSAVEC, XSAVES and the restores, plain and 64), with the bytes go tool asm
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// emits for each: the differential ground truth the family is proven
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// against, line for line.
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var amd64XsaveCorpus = []struct {
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line string
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want string
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}{
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{"XRSTOR (BX)", "0f ae 2b"},
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{"XRSTOR (R11)", "41 0f ae 2b"},
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{"XRSTOR64 (BX)", "48 0f ae 2b"},
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{"XRSTOR64 (R11)", "49 0f ae 2b"},
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{"XRSTORS (BX)", "0f c7 1b"},
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{"XRSTORS (R11)", "41 0f c7 1b"},
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{"XRSTORS64 (BX)", "48 0f c7 1b"},
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{"XRSTORS64 (R11)", "49 0f c7 1b"},
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{"XSAVE (BX)", "0f ae 23"},
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{"XSAVE (R11)", "41 0f ae 23"},
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{"XSAVE64 (BX)", "48 0f ae 23"},
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{"XSAVE64 (R11)", "49 0f ae 23"},
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{"XSAVEC (BX)", "0f c7 23"},
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{"XSAVEC (R11)", "41 0f c7 23"},
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{"XSAVEC64 (BX)", "48 0f c7 23"},
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{"XSAVEC64 (R11)", "49 0f c7 23"},
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{"XSAVEOPT (BX)", "0f ae 33"},
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{"XSAVEOPT (R11)", "41 0f ae 33"},
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{"XSAVEOPT64 (BX)", "48 0f ae 33"},
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{"XSAVEOPT64 (R11)", "49 0f ae 33"},
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{"XSAVES (BX)", "0f c7 2b"},
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{"XSAVES (R11)", "41 0f c7 2b"},
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{"XSAVES64 (BX)", "48 0f c7 2b"},
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{"XSAVES64 (R11)", "49 0f c7 2b"},
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}
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// TestAmd64XsaveCorpus assembles every corpus line and requires the same bytes
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// go tool asm emits for it.
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func TestAmd64XsaveCorpus(t *testing.T) {
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for _, tc := range amd64XsaveCorpus {
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fn := firstText(t, "TEXT ·p(SB), 4, $0\n\t"+tc.line+"\n")
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code, _, err := Assemble(fn)
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if err != nil {
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t.Errorf("%s: %v", tc.line, err)
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continue
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}
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if got := hexBytes(code); got != tc.want {
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t.Errorf("%s: got %s, want %s", tc.line, got, tc.want)
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}
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}
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}
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