From c4719e75fd1cc209b46ec3844110e1d87266c5d2 Mon Sep 17 00:00:00 2001
From: gingerBill <bill@gingerbill.org>
Date: Mon, 5 May 2025 11:43:19 +0100
Subject: [PATCH] Add `simd.indices` and docs

---
 base/intrinsics/intrinsics.odin |  2 +-
 core/simd/simd.odin             | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/base/intrinsics/intrinsics.odin b/base/intrinsics/intrinsics.odin
index bec452007..c275dedaf 100644
--- a/base/intrinsics/intrinsics.odin
+++ b/base/intrinsics/intrinsics.odin
@@ -298,7 +298,7 @@ simd_masked_store :: proc(ptr: rawptr, val: #simd[N]T, mask: #simd[N]U)
 simd_masked_expand_load    :: proc(ptr: rawptr, val: #simd[N]T, mask: #simd[N]U) -> #simd[N]T where type_is_integer(U) || type_is_boolean(U) ---
 simd_masked_compress_store :: proc(ptr: rawptr, val: #simd[N]T, mask: #simd[N]U)              where type_is_integer(U) || type_is_boolean(U) ---
 
-
+simd_indices :: proc($T: typeid/#simd[$N]$E) -> T where type_is_numeric(T) ---
 
 simd_shuffle :: proc(a, b: #simd[N]T, indices: ..int) -> #simd[len(indices)]T ---
 simd_select  :: proc(cond: #simd[N]boolean_or_integer, true, false: #simd[N]T) -> #simd[N]T ---
diff --git a/core/simd/simd.odin b/core/simd/simd.odin
index 37cc19ebd..0e69304c3 100644
--- a/core/simd/simd.odin
+++ b/core/simd/simd.odin
@@ -2510,3 +2510,17 @@ Example:
 recip :: #force_inline proc "contextless" (v: $T/#simd[$LANES]$E) -> T where intrinsics.type_is_float(E) {
 	return T(1) / v
 }
+
+
+/*
+Create a vector where each lane contains the index of that lane.
+Inputs:
+- `V`: The type of the vector to create.
+Result:
+- A vector of the given type, where each lane contains the index of that lane.
+**Operation**:
+	for i in 0 ..< N {
+		res[i] = i
+	}
+*/
+indices :: intrinsics.simd_indices
\ No newline at end of file