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library: Build some functions as ARM to increase performance

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Using `mulf32()` while compiling functions to Thumb makes the compiler
add calls to `__aeabi_lmul()` once per multiplication. This routine is
quite slow, so the cost of any function that uses `mulf32()` a lot is
quite high.

Switching math-heavy functions to ARM increases performance and reduces
code size.
This commit is contained in:
Antonio Niño Díaz 2024-03-16 03:04:02 +01:00
parent 82171bbf69
commit b0d9151455
1 changed files with 7 additions and 6 deletions
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13
source/NECamera.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: MIT
//
// Copyright (c) 2008-2022 Antonio Niño Díaz
// Copyright (c) 2008-2024 Antonio Niño Díaz
//
// This file is part of Nitro Engine
@ -13,7 +13,7 @@ static int NE_MAX_CAMERAS;
static bool ne_camera_system_inited = false;
// Internal use only
static void __NE_CameraUpdateMatrix(NE_Camera * cam)
ARM_CODE static void __NE_CameraUpdateMatrix(NE_Camera * cam)
{
// From libnds, modified a bit
int32 side[3], forward[3], up[3];
@ -118,7 +118,7 @@ void NE_CameraUse(NE_Camera *cam)
glLoadMatrix4x4(&cam->matrix);
}
void NE_CameraMoveFreeI(NE_Camera *cam, int front, int right, int up)
ARM_CODE void NE_CameraMoveFreeI(NE_Camera *cam, int front, int right, int up)
{
NE_AssertPointer(cam, "NULL pointer");
@ -189,7 +189,7 @@ void NE_CameraMoveI(NE_Camera *cam, int x, int y, int z)
cam->to[2] += z;
}
void NE_CameraRotate(NE_Camera *cam, int rx, int ry, int rz)
ARM_CODE void NE_CameraRotate(NE_Camera *cam, int rx, int ry, int rz)
{
NE_AssertPointer(cam, "NULL pointer");
@ -250,7 +250,8 @@ void NE_CameraRotate(NE_Camera *cam, int rx, int ry, int rz)
}
// Internal use only
static void __NE_RotateVectorAxis(int32 *vector, int angle, int x, int y, int z)
ARM_CODE static void __NE_RotateVectorAxis(int32 *vector, int angle,
int x, int y, int z)
{
// Vector must be an array of 3 ints with your vector in f32 format!
int sin = sinLerp(angle << 6);
@ -314,7 +315,7 @@ void NE_CameraRotateAxisI(NE_Camera *cam, int angle, int x, int y, int z)
cam->to[i] = cam->from[i] + cam_vector[i];
}
void NE_CameraRotateFree(NE_Camera *cam, int rx, int ry, int rz)
ARM_CODE void NE_CameraRotateFree(NE_Camera *cam, int rx, int ry, int rz)
{
NE_AssertPointer(cam, "NULL pointer");