np: backend: Add backend pirho sources

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/sys/np/codegen/piir_engine.c b/src/sys/np/codegen/piir_engine.c
new file mode 100644
index 0000000..d756c44
--- /dev/null
+++ b/src/sys/np/codegen/piir_engine.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/syslog.h>
+#include <machine/piir.h>
+#include <os/np.h>
+#include <np/piir.h>
+#include <string.h>
+
+#define pr_trace(fmt, ...) printf("pirho.piir: " fmt, ##__VA_ARGS__)
+#define pr_error(fmt, ...) printf("pirho.piir: error: " fmt, ##__VA_ARGS__)
+
+int
+piir_inject(struct np_work *work)
+{
+    struct piir_stack *stack;
+    struct piir_vm vm;
+    ir_byte_t byte;
+
+    if (work == NULL) {
+        return -EINVAL;
+    }
+
+    /* Need the stack */
+    if ((stack = work->piir_stack) == NULL) {
+        return -EIO;
+    }
+
+    /* Put the vm in a known state */
+    memset(&vm, 0, sizeof(vm));
+
+    /*
+     * Go through each byte and decode the IR, new
+     * machine code should be in `vm.code' after
+     * this loop.
+     */
+    while ((byte = piir_pop(stack)) >= 0) {
+        md_piir_decode(work, &vm, byte);
+    }
+
+    return 0;
+}