# shz_xmtrx_sub_4x4

Source: https://sh4zam.com/api/xmtrx/shz_xmtrx_sub_4x4/

> Subtracts each element within mat from each element within XMTRX, storing the result in XMTRX

```c
SHZ_INLINE void shz_xmtrx_sub_4x4(const shz_mat4x4_t* mat) SHZ_NOEXCEPT;
```

Subtracts each element within `mat` from each element within XMTRX, storing the result in XMTRX.

## Parameters

| Name | Type | Description |
| --- | --- | --- |
| `mat` | `const shz_mat4x4_t *` |  |

## Returns

Nothing (`void`).

## Naming and requirements

- `shz_mat4x4_t` and `shz_mat2x2_t` arguments must be 8-byte aligned. Unaligned data goes through the `float[16]` parameters of the `_unaligned` routines.

## Availability

- **C++ equivalent:** [`shz::xmtrx::sub`](https://sh4zam.com/api/cpp/xmtrx/#sub)
- **Type-generic form:** none
- **Back-ends:** SH4: dedicated SH4 implementation · SW: portable C · SPU: shared C implementation
- **Defined in:** [`sh4zam/shz_xmtrx.h:823`](https://github.com/gyrovorbis/sh4zam/blob/ba1e30c88d49df0311870b229e1dd860ef26c477/include/sh4zam/shz_xmtrx.h#L823)
- **Module:** [XMTRX](https://sh4zam.com/api/xmtrx/), section "Component-Wise Matrix Operations"