lm32: opcode testsuite

This patch creates tests/lm32 directory and adds tests for every
LatticeMico32 opcode.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

tests/lm32/macros.inc

@@ -0,0 +1,79 @@
+
+.macro test_name name
+	.data
+tn_\name:
+	.asciz "\name"
+	.text
+	mvhi r13, hi(tn_\name)
+	ori r13, r13, lo(tn_\name)
+	sw (r12+8), r13
+.endm
+
+.macro load reg val
+	mvhi \reg, hi(\val)
+	ori \reg, \reg, lo(\val)
+.endm
+
+.macro tc_pass
+	mvi r13, 0
+	sw (r12+4), r13
+.endm
+
+.macro tc_fail
+	mvi r13, 1
+	sw (r12+4), r13
+.endm
+
+.macro check_r3 val
+	mvhi r13, hi(\val)
+	ori r13, r13, lo(\val)
+	be r3, r13, 1f
+	tc_fail
+	bi 2f
+1:
+	tc_pass
+2:
+.endm
+
+.macro check_mem adr val
+	mvhi r13, hi(\adr)
+	ori r13, r13, lo(\adr)
+	mvhi r14, hi(\val)
+	ori r14, r14, lo(\val)
+	lw r13, (r13+0)
+	be r13, r14, 1f
+	tc_fail
+	bi 2f
+1:
+	tc_pass
+2:
+.endm
+
+.macro check_excp excp
+	andi r13, r25, \excp
+	bne r13, r0, 1f
+	tc_fail
+	bi 2f
+1:
+	tc_pass
+2:
+.endm
+
+.macro start
+	.global _main
+	.text
+_main:
+	mvhi r12, hi(0xffff0000)      # base address of test block
+	ori r12, r12, lo(0xffff0000)
+.endm
+
+.macro end
+	sw (r12+0), r0
+1:
+	bi 1b
+.endm
+
+# base +
+#  0  ctrl
+#  4  pass/fail
+#  8  ptr to test name