From ef9e77447da6211902ca0daeb1f06c0ef07f07ce Mon Sep 17 00:00:00 2001
From: Adrian Siekierka <kontakt@asie.pl>
Date: Sat, 29 May 2021 10:02:41 +0200
Subject: [PATCH] uxn core: this way of handling u->ram.ptr saves a few cycles
 (~0.1%)

---
 arm9/source/uxn.c | 10 ++++++----
 include/uxn.h     |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/arm9/source/uxn.c b/arm9/source/uxn.c
index 6858cbc..e7d9a87 100644
--- a/arm9/source/uxn.c
+++ b/arm9/source/uxn.c
@@ -510,14 +510,15 @@ evaluxn(Uxn *u, Uint16 vec)
 		case 0xa1: /* LIT2k */
 			__asm__( "evaluxn_21_LIT2:" );
 			{
-				u->wst.dat[u->wst.ptr] = mempeek8(u->ram.dat, u->ram.ptr++);
-				u->wst.dat[u->wst.ptr + 1] = mempeek8(u->ram.dat, u->ram.ptr++);
+				u->wst.dat[u->wst.ptr] = mempeek8(u->ram.dat, u->ram.ptr);
+				u->wst.dat[u->wst.ptr + 1] = mempeek8(u->ram.dat, u->ram.ptr + 1);
 #ifndef NO_STACK_CHECKS
 				if(__builtin_expect(u->wst.ptr > 253, 0)) {
 					u->wst.error = 2;
 					goto error;
 				}
 #endif
+				u->ram.ptr += 2;
 				u->wst.ptr += 2;
 			}
 			break;
@@ -1433,14 +1434,15 @@ evaluxn(Uxn *u, Uint16 vec)
 		case 0xe1: /* LIT2kr */
 			__asm__( "evaluxn_61_LIT2r:" );
 			{
-				u->rst.dat[u->rst.ptr] = mempeek8(u->ram.dat, u->ram.ptr++);
-				u->rst.dat[u->rst.ptr + 1] = mempeek8(u->ram.dat, u->ram.ptr++);
+				u->rst.dat[u->rst.ptr] = mempeek8(u->ram.dat, u->ram.ptr);
+				u->rst.dat[u->rst.ptr + 1] = mempeek8(u->ram.dat, u->ram.ptr + 1);
 #ifndef NO_STACK_CHECKS
 				if(__builtin_expect(u->rst.ptr > 253, 0)) {
 					u->rst.error = 2;
 					goto error;
 				}
 #endif
+				u->ram.ptr += 2;
 				u->rst.ptr += 2;
 			}
 			break;
diff --git a/include/uxn.h b/include/uxn.h
index 98692b5..fdf9e67 100644
--- a/include/uxn.h
+++ b/include/uxn.h
@@ -46,7 +46,7 @@ typedef struct Device {
 } Device;
 
 typedef struct Uxn {
-	Stack wst, rst, *src, *dst;
+	Stack wst, rst;
 	Memory ram;
 	Device dev[16];
 } Uxn;