diff --git a/vendor/directx/d3d12/d3d12.odin b/vendor/directx/d3d12/d3d12.odin
index e707b0885..3e078a5ed 100644
--- a/vendor/directx/d3d12/d3d12.odin
+++ b/vendor/directx/d3d12/d3d12.odin
@@ -1571,7 +1571,7 @@ VIEW_INSTANCING_DESC :: struct {
 	Flags:                  VIEW_INSTANCING_FLAGS,
 }
 
-SHADER_COMPONENT_MAPPING :: enum i32 {
+SHADER_COMPONENT_MAPPING :: enum u32 {
 	FROM_MEMORY_COMPONENT_0 = 0,
 	FROM_MEMORY_COMPONENT_1 = 1,
 	FROM_MEMORY_COMPONENT_2 = 2,
@@ -1579,6 +1579,16 @@ SHADER_COMPONENT_MAPPING :: enum i32 {
 	FORCE_VALUE_0           = 4,
 	FORCE_VALUE_1           = 5,
 }
+ENCODE_SHADER_4_COMPONENT_MAPPING :: #force_inline proc "contextless" (Src0, Src1, Src2, Src3: u32) -> u32 {
+    return (Src0 & SHADER_COMPONENT_MAPPING_MASK) |
+           ((Src1 & SHADER_COMPONENT_MAPPING_MASK) << SHADER_COMPONENT_MAPPING_SHIFT) |
+           ((Src2 & SHADER_COMPONENT_MAPPING_MASK) << (SHADER_COMPONENT_MAPPING_SHIFT * 2)) |
+           ((Src3 & SHADER_COMPONENT_MAPPING_MASK) << (SHADER_COMPONENT_MAPPING_SHIFT * 3)) |
+           SHADER_COMPONENT_MAPPING_ALWAYS_SET_BIT_AVOIDING_ZEROMEM_MISTAKES
+}
+DECODE_SHADER_4_COMPONENT_MAPPING :: #force_inline proc "contextless" (ComponentToExtract, Mapping: u32) -> u32 {
+    return Mapping >> (SHADER_COMPONENT_MAPPING_SHIFT * ComponentToExtract) & SHADER_COMPONENT_MAPPING_MASK
+}
 
 BUFFER_SRV_FLAGS :: distinct bit_set[BUFFER_SRV_FLAG; u32]
 BUFFER_SRV_FLAG :: enum u32 {
diff --git a/vendor/directx/d3d12/d3d12_constants.odin b/vendor/directx/d3d12/d3d12_constants.odin
index a30296cc1..62725656a 100644
--- a/vendor/directx/d3d12/d3d12_constants.odin
+++ b/vendor/directx/d3d12/d3d12_constants.odin
@@ -498,6 +498,12 @@ WHQL_DRAW_VERTEX_COUNT_2_TO_EXP :: 25
 
 SHADER_COMPONENT_MAPPING_MASK :: 0x7
 SHADER_COMPONENT_MAPPING_SHIFT :: 3
+SHADER_COMPONENT_MAPPING_ALWAYS_SET_BIT_AVOIDING_ZEROMEM_MISTAKES :: 1 << (SHADER_COMPONENT_MAPPING_SHIFT * 4)
+DEFAULT_SHADER_4_COMPONENT_MAPPING :: (0 & SHADER_COMPONENT_MAPPING_MASK) |
+    ((1 & SHADER_COMPONENT_MAPPING_MASK) << SHADER_COMPONENT_MAPPING_SHIFT) |
+    ((2 & SHADER_COMPONENT_MAPPING_MASK) << (SHADER_COMPONENT_MAPPING_SHIFT * 2)) |
+    ((3 & SHADER_COMPONENT_MAPPING_MASK) << (SHADER_COMPONENT_MAPPING_SHIFT * 3)) |
+    SHADER_COMPONENT_MAPPING_ALWAYS_SET_BIT_AVOIDING_ZEROMEM_MISTAKES
 
 FILTER_REDUCTION_TYPE_MASK :: 0x3
 FILTER_REDUCTION_TYPE_SHIFT :: 7