Add vshuf.b

README.md

@@ -12,12 +12,6 @@ Vector Float Compare
 
 <cmp>: See fcmp.cond.s/d instruction
 
-### vshuf.b
-
-Vector Shuffle
-
-`__m128i __lsx_vshuf_b (__m128i a, __m128i b, __m128i c)`
-
 ### vld
 
 Vector Load

docs/lsx_misc/vshuf.md

@@ -0,0 +1,28 @@
+# Shuffling
+
+## __m128i __lsx_vshuf_b (__m128i a, __m128i b, __m128i c)
+
+### Synopsis
+
+```c++
+__m128i __lsx_vshuf_b (__m128i a, __m128i b, __m128i c)
+#include <lsxintrin.h>
+Instruction: vshuf.b vr, vr, vr
+CPU Flags: LSX
+```
+
+### Description
+
+Shuffle bytes from `a` and `b` with indices from `c`.
+
+### Operation
+
+```c++
+for (int i = 0;i < 16;i++) {
+    if (c.byte[i] % 32 < 16) {
+        dst.byte[i] = b.byte[c.byte[i] % 16];
+    } else {
+        dst.byte[i] = a.byte[c.byte[i] % 16];
+    }
+}
+```