110 lines
3.0 KiB
Go
110 lines
3.0 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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// amd64X87Corpus holds every line the Go toolchain's own
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// amd64enc.s carries for the x87 family (stack controls, the arithmetic pair, the compares, the memory loads and the FXSAVE pair), 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 amd64X87Corpus = []struct {
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line string
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want string
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}{
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{"F2XM1", "d9 f0"},
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{"FABS", "d9 e1"},
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{"FADDD F2, F0", "d8 c2"},
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{"FADDD F3, F0", "d8 c3"},
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{"FADDD F0, F2", "dc c2"},
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{"FADDD F0, F3", "dc c3"},
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{"FADDD (BX), F0", "dc 03"},
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{"FADDD (R11), F0", "41 dc 03"},
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{"FADDDP F0, F2", "de c2"},
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{"FADDDP F0, F3", "de c3"},
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{"FBLD (BX)", "df 23"},
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{"FBLD (R11)", "41 df 23"},
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{"FBSTP (BX)", "df 33"},
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{"FBSTP (R11)", "41 df 33"},
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{"FCHS", "d9 e0"},
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{"FCMOVB F2, F0", "da c2"},
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{"FCMOVB F3, F0", "da c3"},
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{"FCMOVBE F2, F0", "da d2"},
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{"FCMOVBE F3, F0", "da d3"},
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{"FCMOVE F2, F0", "da ca"},
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{"FCMOVE F3, F0", "da cb"},
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{"FCMOVNB F2, F0", "db c2"},
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{"FCMOVNB F3, F0", "db c3"},
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{"FCMOVNBE F2, F0", "db d2"},
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{"FCMOVNBE F3, F0", "db d3"},
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{"FCMOVNE F2, F0", "db ca"},
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{"FCMOVNE F3, F0", "db cb"},
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{"FCMOVNU F2, F0", "db da"},
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{"FCMOVNU F3, F0", "db db"},
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{"FCMOVU F2, F0", "da da"},
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{"FCMOVU F3, F0", "da db"},
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{"FCOMD F2, F0", "d8 d2"},
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{"FCOMD F3, F0", "d8 d3"},
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{"FCOMD (BX), F0", "dc 13"},
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{"FCOMD (R11), F0", "41 dc 13"},
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{"FCOMI F2, F0", "db f2"},
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{"FCOMI F3, F0", "db f3"},
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{"FCOMIP F2, F0", "df f2"},
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{"FCOMIP F3, F0", "df f3"},
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{"FCOS", "d9 ff"},
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{"FDECSTP", "d9 f6"},
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{"FDIVD F2, F0", "d8 f2"},
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{"FDIVD F3, F0", "d8 f3"},
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{"FDIVD F0, F2", "dc fa"},
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{"FDIVD F0, F3", "dc fb"},
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{"FDIVD (BX), F0", "dc 33"},
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{"FDIVD (R11), F0", "41 dc 33"},
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{"FINCSTP", "d9 f7"},
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{"FLD1", "d9 e8"},
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{"FLDCW (BX)", "d9 2b"},
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{"FLDCW (R11)", "41 d9 2b"},
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{"FLDL2E", "d9 ea"},
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{"FLDL2T", "d9 e9"},
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{"FLDLG2", "d9 ec"},
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{"FLDPI", "d9 eb"},
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{"FNOP", "d9 d0"},
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{"FPATAN", "d9 f3"},
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{"FPREM", "d9 f8"},
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{"FPREM1", "d9 f5"},
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{"FPTAN", "d9 f2"},
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{"FRNDINT", "d9 fc"},
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{"FSCALE", "d9 fd"},
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{"FSIN", "d9 fe"},
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{"FSINCOS", "d9 fb"},
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{"FSQRT", "d9 fa"},
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{"FTST", "d9 e4"},
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{"FXAM", "d9 e5"},
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{"FXRSTOR (BX)", "0f ae 0b"},
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{"FXRSTOR (R11)", "41 0f ae 0b"},
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{"FXRSTOR64 (BX)", "48 0f ae 0b"},
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{"FXRSTOR64 (R11)", "49 0f ae 0b"},
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{"FXSAVE (BX)", "0f ae 03"},
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{"FXSAVE (R11)", "41 0f ae 03"},
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{"FXSAVE64 (BX)", "48 0f ae 03"},
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{"FXSAVE64 (R11)", "49 0f ae 03"},
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{"FXTRACT", "d9 f4"},
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{"FYL2X", "d9 f1"},
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{"FYL2XP1", "d9 f9"},
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}
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// TestAmd64X87Corpus assembles every corpus line and requires the same bytes
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// go tool asm emits for it.
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func TestAmd64X87Corpus(t *testing.T) {
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for _, tc := range amd64X87Corpus {
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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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