test(disasm): pin decode parity with the toolchain and the round-trip invariant

Assisted-by: GLM 5.3 Flash

disasm/testdata/parity_amd64_sys.txt

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+cd04	INT $0x4
+4883ef04	SUBQ $0x4, DI
+49836c240804	SUBQ $0x4, 0x8(R12)
+72e9	JB 0x598
+7202	JB 0x5b9
+7205	JB 0x5c7
+7204	JB 0x5d4
+7202	JB 0x5de
+ff20	JMP 0(AX)
+7203	JB 0x5f2
+7204	JB 0x5fe
+43ff24ac	JMP 0(R12)(R13*4)
+ff2424	JMP 0(SP)
+7203	JB 0x61b
+410fa5c3	SHLDL CL, AX, R11
+660fafda	IMULW DX, BX
+660fc2150000000004	CMPPD $0x4, 0(IP), X2
+ca0400	LRET $0x4
+f20fd6c9	MOVDQ2Q X1, M1
+488b544c20	MOVQ 0x20(SP)(CX*2), DX
+468bac64437e0000	MOVL 0x7e43(SP)(R12*2), R13
+8a0444	MOVB 0(SP)(AX*2), AL
+64488b142500000000	MOVQ FS:0, DX