From c904bc2b78045bd81cfc3603422c385cbf7adc75 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 2 Oct 2025 20:06:06 -0400
Subject: kern: np: Add support for return statements

This commit introduces lexical, parsing and code generation support for
the return statements. As of now, one is only able to return unsigned integers
but this will be expanded upon in the future

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 src/sys/include/np/lex.h  | 2 ++
 src/sys/include/np/piir.h | 1 +
 2 files changed, 3 insertions(+)

(limited to 'src/sys/include/np')

diff --git a/src/sys/include/np/lex.h b/src/sys/include/np/lex.h
index ebd6f32..ba581b7 100644
--- a/src/sys/include/np/lex.h
+++ b/src/sys/include/np/lex.h
@@ -41,6 +41,7 @@ struct np_work;
 #define TOKEN_BEGIN "begin"
 #define TOKEN_PROC "proc"
 #define TOKEN_END "end"
+#define TOKEN_RETURN "return"
 
 /* Types */
 #define TOKEN_U8    "u8"
@@ -93,6 +94,7 @@ typedef enum {
     TT_BEGIN,           /* 'begin' */
     TT_PROC,            /* 'proc' */
     TT_END,             /* 'end' */
+    TT_RETURN,          /* 'return' */
 } tt_t;
 
 typedef uint64_t tokval_t;
diff --git a/src/sys/include/np/piir.h b/src/sys/include/np/piir.h
index d108776..5625409 100644
--- a/src/sys/include/np/piir.h
+++ b/src/sys/include/np/piir.h
@@ -56,6 +56,7 @@ typedef int8_t md_byte_t;
 #define PIIR_LOAD_R32 0x03  /* Load 32-bit register */
 #define PIIR_LOAD_R64 0x04  /* Load 64-bit register */
 #define PIIR_RET_NIL  0x05  /* Return nothing */
+#define PIIR_RET_NUM  0x06  /* Return a number */
 
 /*
  * Represents the PIIR virtual machine for storing
-- 
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