Add real ADSP-2191 assembly examples + open21xx assembler test

examples/isa_test.dsp

@@ -0,0 +1,94 @@
+/*
+ * isa_test.dsp -- ADSP-219x ISA coverage test for disassembler validation.
+ * Assembles with open21xx as219x.
+ */
+	.section/PM program0;
+	.global _start;
+_start:
+
+	/* Type 30: NOP */
+	nop;
+
+	/* Type 6: Dreg = Imm16 */
+	ax0 = 0x1234;
+	ax1 = 0x5678;
+	ay0 = 0xAAAA;
+	mx0 = 0x4000;
+	my0 = 0x2000;
+
+	/* Type 7: Reg1/Reg2 = Imm16 */
+	i0 = 0x0100;
+	i1 = 0x0200;
+	i4 = 0x0300;
+	m0 = 1;
+	m1 = 1;
+	m3 = -1;
+	m4 = 1;
+	l0 = 0;
+	l4 = 0;
+	cntr = 10;
+
+	/* Type 17: Reg = Reg */
+	ar = ax0;
+	si = ax1;
+	mr0 = mx0;
+
+	/* Type 9: Conditional Compute */
+	ar = ax0 + ay0;
+	ar = ax0 - ay0;
+	ar = ax0 and ay0;
+	ar = ax0 or ay0;
+	ar = ax0 xor ay0;
+	ar = pass ax0;
+	ar = -ax0;
+	ar = abs ax0;
+	mr = mx0 * my0 (ss);
+
+	/* Type 10: Direct Jump */
+	jump _skip1;
+_skip1:
+	nop;
+
+	/* Type 10: Conditional Jump */
+	if eq jump _skip2;
+_skip2:
+	nop;
+
+	/* Type 10: Call */
+	call _sub1;
+	jump _after_sub;
+
+_sub1:
+	nop;
+	rts;
+
+_after_sub:
+
+	/* Type 20: Return variants */
+	nop;
+
+	/* Type 11: DO UNTIL */
+	cntr = 4;
+	do _loop_end until ce;
+	nop;
+_loop_end:
+	nop;
+
+	/* Type 15: Shift Immediate */
+	sr = lshift si by 4 (hi);
+	sr = ashift si by -2 (hi);
+
+	/* Type 18: Mode Control */
+	dis ar_sat;
+	ena ar_sat;
+
+	/* Type 25: Saturate */
+	sat mr;
+
+	/* Type 33: Reg3 = short constant */
+	se = 0;
+
+	/* Infinite loop */
+_halt:
+	jump _halt;
+