py/emitinlinerv32: Add inline assembler support for RV32.

This commit adds support for writing inline assembler functions when
targeting a RV32IMC processor.

Given that this takes up a bit of rodata space due to its large
instruction decoding table and its extensive error messages, it is
enabled by default only on offline targets such as mpy-cross and the
qemu port.

Signed-off-by: Alessandro Gatti <a.gatti@frob.it>

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/inlineasm/rv32/asmargs.py b/tests/inlineasm/rv32/asmargs.py
new file mode 100644
index 000000000..78afd5111
--- /dev/null
+++ b/tests/inlineasm/rv32/asmargs.py
@@ -0,0 +1,44 @@
+# test passing arguments
+
+
+@micropython.asm_rv32
+def arg0():
+    c_li(a0, 1)
+
+
+print(arg0())
+
+
+@micropython.asm_rv32
+def arg1(a0):
+    addi(a0, a0, 1)
+
+
+print(arg1(1))
+
+
+@micropython.asm_rv32
+def arg2(a0, a1):
+    add(a0, a0, a1)
+
+
+print(arg2(1, 2))
+
+
+@micropython.asm_rv32
+def arg3(a0, a1, a2):
+    add(a0, a0, a1)
+    add(a0, a0, a2)
+
+
+print(arg3(1, 2, 3))
+
+
+@micropython.asm_rv32
+def arg4(a0, a1, a2, a3):
+    add(a0, a0, a1)
+    add(a0, a0, a2)
+    add(a0, a0, a3)
+
+
+print(arg4(1, 2, 3, 4))