From f231ef0596ae3bd810f3d89ad22f98e2e820fd39 Mon Sep 17 00:00:00 2001
From: gingerBill <gingerBill@users.noreply.github.com>
Date: Tue, 19 May 2026 15:44:31 +0100
Subject: [PATCH] Support `simd.byte_swap`

---
 core/simd/simd.odin   | 6 ++++++
 src/check_builtin.cpp | 9 ++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/core/simd/simd.odin b/core/simd/simd.odin
index 8420a1b99..11dc8129d 100644
--- a/core/simd/simd.odin
+++ b/core/simd/simd.odin
@@ -2585,6 +2585,12 @@ Reverse the bit pattern of a SIMD vector.
 */
 reverse_bits :: intrinsics.reverse_bits
 
+/*
+Swap the bytes of the elements of a SIMD vector.
+*/
+byte_swap :: intrinsics.byte_swap
+
+
 /*
 **Operation**
 
diff --git a/src/check_builtin.cpp b/src/check_builtin.cpp
index 0a7943a4d..1a6b97b49 100644
--- a/src/check_builtin.cpp
+++ b/src/check_builtin.cpp
@@ -5610,7 +5610,14 @@ gb_internal bool check_builtin_procedure(CheckerContext *c, Operand *operand, As
 				return false;
 			}
 
-			if (!is_type_integer_like(x.type) && !is_type_float(x.type)) {
+			if (is_type_simd_vector(x.type)) {
+				Type *elem = base_array_type(x.type);
+				if (!is_type_integer_like(elem)) {
+					gbString xts = type_to_string(x.type);
+					error(x.expr, "#simd values passed to '%.*s' must have an element of an integer-like type (integer, boolean, enum, bit_set), got %s", LIT(builtin_name), xts);
+					gb_string_free(xts);
+				}
+			} else if (!is_type_integer_like(x.type) && !is_type_float(x.type)) {
 				gbString xts = type_to_string(x.type);
 				error(x.expr, "Values passed to '%.*s' must be an integer-like type (integer, boolean, enum, bit_set) or float, got %s", LIT(builtin_name), xts);
 				gb_string_free(xts);