add NEON optimization

1 files changed, 14 insertions, 0 deletions

diff --git a/fmdsp/fmdsp-vramlookup-c.c b/fmdsp/fmdsp-vramlookup-c.c
new file mode 100644
index 0000000..f900c8d
--- /dev/null
+++ b/fmdsp/fmdsp-vramlookup-c.c
@@ -0,0 +1,14 @@
+#include "fmdsp/fmdsp.h"
+
+void fmdsp_vramlookup_c(uint8_t *vram32, const uint8_t *vram, const uint8_t *palette, int stride) {
+  for (int y = 0; y < PC98_H; y++) {
+    for (int x = 0; x < PC98_W; x++) {
+      uint8_t r = palette[vram[y*PC98_W+x]*3+0];
+      uint8_t g = palette[vram[y*PC98_W+x]*3+1];
+      uint8_t b = palette[vram[y*PC98_W+x]*3+2];
+      uint32_t data = (((uint32_t)r)<<16) | (((uint32_t)g)<<8) | ((uint32_t)b);
+      uint32_t *row = (uint32_t *)(vram32 + y*stride);
+      row[x] = data;
+    }
+  }
+}