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xmath.c
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xmath.c
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/**
* This file belongs to the 'xlab' game engine.
* Copyright 2009 xfacter
* Copyright 2016 wickles
* This work is licensed under the LGPLv3
* subject to all terms as reproduced in the included LICENSE file.
*/
#include <stdio.h>
#include <psptypes.h>
#include <psprtc.h>
#include "xmath.h"
//#define ASM_SAFE
static SceKernelUtilsMt19937Context x_mt19937_ctx;
void x_srand(u32 s)
{
sceKernelUtilsMt19937Init(&x_mt19937_ctx, s);
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %0, S000\n"
"vrnds.s S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
:: "r"(s)
);
}
void x_auto_srand()
{
u64 time;
sceRtcGetCurrentTick(&time);
x_srand(time);
}
int x_randi(int min, int max)
{
return (min >= max ? min : min + sceKernelUtilsMt19937UInt(&x_mt19937_ctx) % (max - min + 1));
}
float x_randf(float min, float max)
{
if (min >= max) return min;
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"mtv %2, S001\n"
"vsub.s S001, S001, S000\n"
"vone.s S002\n"
"vrndf1.s S003\n"
"vsub.s S003, S003, S002\n"
"vmul.s S001, S003, S001\n"
"vadd.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(min), "r"(max)
);
return result;
}
float x_sqrtf(float x)
{
float result;
#if 0
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vsqrt.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
#else
result = sqrtf(x);
#endif
return result;
}
float x_modf(float x, float y)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %2, S001\n"
"mtv %1, S000\n"
"vrcp.s S002, S001\n"
"vmul.s S003, S000, S002\n"
"vf2iz.s S002, S003, 0\n"
"vi2f.s S003, S002, 0\n"
"vmul.s S003, S003, S001\n"
"vsub.s S000, S000, S003\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x), "r"(y)
);
return result;
}
float x_sinf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_2_PI\n"
"vmul.s S000, S000, S001\n"
"vsin.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_cosf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_2_PI\n"
"vmul.s S000, S000, S001\n"
"vcos.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_tanf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_2_PI\n"
"vmul.s S000, S000, S001\n"
"vrot.p C002, S000, [s, c]\n"
"vdiv.s S000, S002, S003\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_asinf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_PI_2\n"
"vasin.s S000, S000\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_acosf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_PI_2\n"
"vasin.s S000, S000\n"
"vocp.s S000, S000\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_atanf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vmul.s S001, S000, S000\n"
"vadd.s S001, S001, S001[1]\n"
"vrsq.s S001, S001\n"
"vmul.s S000, S000, S001\n"
"vasin.s S000, S000\n"
"vcst.s S001, VFPU_PI_2\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_atan2f(float y, float x)
{
if (x == 0 && y == 0) return 0;
float result;
if (fabsf(x) >= fabsf(y))
{
result = x_atanf(y/x);
if (x < 0.0f) result += (y>=0.0f ? X_PI : -X_PI);
}
else
{
result = -x_atanf(x/y);
result += (y < 0.0f ? -X_PI/2 : X_PI/2);
}
return result;
}
float x_sinhf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_LN2\n"
"vrcp.s S001, S001\n"
"vmov.s S002, S000[|x|]\n"
"vcmp.s NE, S000, S002\n"
"vmul.s S002, S001, S002\n"
"vexp2.s S002, S002\n"
"vrcp.s S003, S002\n"
"vsub.s S002, S002, S003\n"
"vmul.s S002, S002, S002[1/2]\n"
"vcmov.s S002, S002[-x], 0\n"
"mfv %0, S002\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_coshf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_LN2\n"
"vrcp.s S001, S001\n"
"vmov.s S002, S000[|x|]\n"
"vmul.s S002, S001, S002\n"
"vexp2.s S002, S002\n"
"vrcp.s S003, S002\n"
"vadd.s S002, S002, S003\n"
"vmul.s S002, S002, S002[1/2]\n"
"mfv %0, S002\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_tanhf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %0, S000\n"
"vadd.s S000, S000, S000\n"
"vcst.s S001, VFPU_LN2\n"
"vrcp.s S001, S001\n"
"vmul.s S000, S000, S001\n"
"vexp2.s S000, S000\n"
"vone.s S001\n"
"vbfy1.p C002, C000\n"
"vdiv.s S000, S003, S002\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
void x_sincos(float rad, float* sin, float* cos)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %2, S002\n"
"vcst.s S003, VFPU_2_PI\n"
"vmul.s S002, S002, S003\n"
"vrot.p C000, S002, [s, c]\n"
"mfv %0, S000\n"
"mfv %1, S001\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(*sin), "=r"(*cos)
: "r"(rad)
);
}
float x_expf(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_LN2\n"
"vrcp.s S001, S001\n"
"vmul.s S000, S000, S001\n"
"vexp2.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_log10f(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_LOG2TEN\n"
"vrcp.s S001, S001\n"
"vlog2.s S000, S000\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_logbf(float b, float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"mtv %2, S001\n"
"vlog2.s S000, S000\n"
"vlog2.s S001, S001\n"
"vrcp.s S001, S001\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x), "r"(b)
);
return result;
}
float x_logef(float x)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"vcst.s S001, VFPU_LOG2E\n"
"vrcp.s S001, S001\n"
"vlog2.s S000, S000\n"
"vmul.s S000, S000, S001\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x)
);
return result;
}
float x_powf(float x, float pow)
{
float result;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %1, S000\n"
"mtv %2, S001\n"
"vlog2.s S001, S001\n"
"vmul.s S000, S000, S001\n"
"vexp2.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "r"(x), "r"(pow)
);
return result;
}
inline int x_next_pow2(int x)
{
if (x <= 0) return 0;
int pow2 = 1;
while (pow2 < x) pow2 <<= 1;
return pow2;
}
inline int x_num_align(int x, int num)
{
return (x % num == 0 ? x : x + num - (x % num));
}
inline int x_absi(int x)
{
return (x < 0 ? -x : x);
}
inline float x_absf(float x)
{
return fabsf(x);
}
inline int x_mini(int x, int y)
{
return (x < y ? x : y);
}
inline float x_minf(float x, float y)
{
return (x < y ? x : y);
}
inline int x_maxi(int x, int y)
{
return (x > y ? x : y);
}
inline float x_maxf(float x, float y)
{
return (x > y ? x : y);
}
inline float x_floorf(float x)
{
return floorf(x);
}
inline float x_ceilf(float x)
{
return ceilf(x);
}
inline float x_ipart(float x)
{
return (float)((int)x);
}
inline float x_fpart(float x)
{
return x - x_ipart(x);
}
float x_roundf(float x)
{
float dec = x_absf(x_fpart(x));
float result = x_floorf(x);
if ((x >= 0 && dec >= 0.5f) || (x < 0 && dec < 0.5f)) result += 1;
return result;
}
inline float x_angle_to_target(float eye_x, float eye_y, float target_x, float target_y)
{
return x_atan2f(target_y - eye_y, target_x - eye_x);
}
void x_lerp(ScePspFVector3* r, ScePspFVector3* v0, ScePspFVector3* v1, float t)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"mtv %3, S020\n"
"vsub.t C010, C010, C000\n"
"vscl.t C010, C010, S020\n"
"vadd.t C000, C000, C010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*v0), "m"(*v1), "r"(t)
);
}
float x_magnitude(ScePspFVector3* v)
{
float result;
#if 0
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"vdot.t S000, C000, C000\n"
"vsqrt.s S000, S000\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "m"(*v)
);
#else
result = x_sqrtf(SQR(v->x) + SQR(v->y) + SQR(v->z));
#endif
return result;
}
void x_normalize(ScePspFVector3* v, float mag)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %0\n"
"lv.s S001, 4 + %0\n"
"lv.s S002, 8 + %0\n"
"vdot.t S010, C000, C000\n"
"vrsq.s S010, S010\n"
"mtv %1, S020\n"
"vmul.s S010, S010, S020\n"
"vscl.t C000, C000, S010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "+m"(*v)
: "r"(mag)
);
}
float x_dotproduct(ScePspFVector3* v0, ScePspFVector3* v1)
{
float result;
#if 1
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vdot.t S000, C000, C010\n"
"mfv %0, S000\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=r"(result)
: "m"(*v0), "m"(*v1)
);
#else
result = v0->x*v1->x + v0->y*v1->y + v0->z*v1->z;
#endif
return result;
}
void x_crossproduct(ScePspFVector3* r, ScePspFVector3* v0, ScePspFVector3* v1)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vcrsp.t C020, C000, C010\n"
"sv.s S020, 0 + %0\n"
"sv.s S021, 4 + %0\n"
"sv.s S022, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*v0), "m"(*v1)
);
}
/* calculates normal from 3 points and normalizes it */
void x_normal(ScePspFVector3* r, ScePspFVector3* p1, ScePspFVector3* p2, ScePspFVector3* p3)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"lv.s S020, 0 + %3\n"
"lv.s S021, 4 + %3\n"
"lv.s S022, 8 + %3\n"
"vsub.t C000, C000, C010\n"
"vsub.t C010, C020, C010\n"
"vcrsp.t C020, C000, C010\n"
"vdot.t S000, C020, C020\n"
"vrsq.s S000, S000\n"
"vscl.t C020, C020, S000\n"
"sv.s S020, 0 + %0\n"
"sv.s S021, 4 + %0\n"
"sv.s S022, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*p1), "m"(*p2), "m"(*p3)
);
}
void x_translate(ScePspFVector3* v, ScePspFVector3* trans)
{
v->x += trans->x;
v->y += trans->y;
v->z += trans->z;
}
void x_rotatex(ScePspFVector3* v, float x)
{
float sin, cos;
x_sincos(x, &sin, &cos);
ScePspFVector3 vec = *v;
v->y = (cos * vec.y) - (sin * vec.z);
v->z = (sin * vec.y) + (cos * vec.z);
}
void x_rotatey(ScePspFVector3* v, float x)
{
float sin, cos;
x_sincos(x, &sin, &cos);
ScePspFVector3 vec = *v;
v->x = (cos * vec.x) + (sin * vec.z);
v->z = -(sin * vec.x) + (cos * vec.z);
}
void x_rotatez(ScePspFVector3* v, float x)
{
float sin, cos;
x_sincos(x, &sin, &cos);
ScePspFVector3 vec = *v;
v->x = (cos * vec.x) - (sin * vec.y);
v->y = (sin * vec.x) + (cos * vec.y);
}
void x_billboard(ScePspFVector3* r, ScePspFVector3* pos, ScePspFMatrix4* view_mat)
{
r->x = pos->x*view_mat->x.x + pos->y*view_mat->y.x + pos->z*view_mat->z.x + view_mat->w.x;
r->y = pos->x*view_mat->x.y + pos->y*view_mat->y.y + pos->z*view_mat->z.y + view_mat->w.y;
r->z = pos->x*view_mat->x.z + pos->y*view_mat->y.z + pos->z*view_mat->z.z + view_mat->w.z;
}
void x_billboard_dir(ScePspFVector3* r, ScePspFVector3* eye, ScePspFVector3* pos, ScePspFVector3* dir)
{
ScePspFVector3 fwd = {eye->x - pos->x, eye->y - pos->y, eye->z - pos->z};
x_crossproduct(r, dir, &fwd);
x_normalize(r, 0.5f);
}
inline float x_dist2(float x1, float y1, float x2, float y2)
{
return x_sqrtf(SQR(x2 - x1) + SQR(y2 - y1));
}
inline float x_dist3(ScePspFVector3* p1, ScePspFVector3* p2)
{
return x_sqrtf(SQR(p2->x - p1->x) + SQR(p2->y - p1->y) + SQR(p2->z - p1->z));
}
inline float x_ease_to_target(float cur, float target, float p, float dt)
{
return cur + (target - cur) * p * dt;
}
inline void x_ease_to_target2(float* cur_x, float* cur_y, float target_x, float target_y, float p, float dt)
{
*cur_x = x_ease_to_target(*cur_x, target_x, p, dt);
*cur_y = x_ease_to_target(*cur_y, target_y, p, dt);
}
inline void x_ease_to_target3(ScePspFVector3* cur, ScePspFVector3* target, float p, float dt)
{
cur->x = x_ease_to_target(cur->x, target->x, p, dt);
cur->y = x_ease_to_target(cur->y, target->y, p, dt);
cur->z = x_ease_to_target(cur->z, target->z, p, dt);
}
int x_dist_test2(float x1, float y1, float x2, float y2, float d)
{
return (SQR(x2-x1) + SQR(y2-y1) < SQR(d));
}
int x_dist_test3(ScePspFVector3* p1, ScePspFVector3* p2, float d)
{
return (SQR(p1->x - p2->x) + SQR(p1->y - p2->y) + SQR(p1->z - p2->z) < SQR(d));
}
xVector3f* xVec3Set(xVector3f* a, float x, float y, float z)
{
a->x = x;
a->y = y;
a->z = z;
return a;
}
xVector3f* xVec3Add(xVector3f* r, xVector3f* a, xVector3f* b)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vadd.t C000, C000, C010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a), "m"(*b)
);
return r;
}
xVector3f* xVec3Sub(xVector3f* r, xVector3f* a, xVector3f* b)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vsub.t C000, C000, C010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a), "m"(*b)
);
return r;
}
xVector3f* xVec3Mul(xVector3f* r, xVector3f* a, xVector3f* b)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vmul.t C000, C000, C010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a), "m"(*b)
);
return r;
}
xVector3f* xVec3Div(xVector3f* r, xVector3f* a, xVector3f* b)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"lv.s S010, 0 + %2\n"
"lv.s S011, 4 + %2\n"
"lv.s S012, 8 + %2\n"
"vdiv.t C000, C000, C010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a), "m"(*b)
);
return r;
}
xVector3f* xVec3Scale(xVector3f* r, xVector3f* a, float s)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"mtv %2, S010\n"
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"vscl.t C000, C000, S010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a), "r"(s)
);
return r;
}
xVector3f* xVec3Normalize(xVector3f* r, xVector3f* a)
{
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"
"lv.s S001, 4 + %1\n"
"lv.s S002, 8 + %1\n"
"vdot.t S010, C000, C000\n"
"vrsq.s S010, S010\n"
"vscl.t C000, C000, S010\n"
"sv.s S000, 0 + %0\n"
"sv.s S001, 4 + %0\n"
"sv.s S002, 8 + %0\n"
#ifdef ASM_SAFE
".set pop\n"
#endif
: "=m"(*r)
: "m"(*a)
);
return r;
}
float xVec3Length(xVector3f* a)
{
float r;
__asm__ volatile (
#ifdef ASM_SAFE
".set push\n"
".set noreorder\n"
#endif
"lv.s S000, 0 + %1\n"