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Sped up min and max functions in Float4.

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Turns out that the standard min/max functions were slow for
some reason, and simple if statements are much faster.  This
simple change improves render times by over 30%.  Crazy.
This commit is contained in:
Nathan Vegdahl 2016-07-16 15:56:14 -07:00
parent 76f074f866
commit 1571c1634e
1 changed files with 103 additions and 78 deletions
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181
src/float4.rs
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@ -16,53 +16,94 @@ impl Float4 {
}
pub fn h_sum(&self) -> f32 {
unsafe {
*self.data.get_unchecked(0) + *self.data.get_unchecked(1) +
*self.data.get_unchecked(2) + *self.data.get_unchecked(3)
}
self.get_0() + self.get_1() + self.get_2() + self.get_3()
}
pub fn h_product(&self) -> f32 {
unsafe {
*self.data.get_unchecked(0) * *self.data.get_unchecked(1) *
*self.data.get_unchecked(2) * *self.data.get_unchecked(3)
}
self.get_0() * self.get_1() * self.get_2() * self.get_3()
}
pub fn h_min(&self) -> f32 {
unsafe {
self.data
.get_unchecked(0)
.min(*self.data.get_unchecked(1))
.min(self.data.get_unchecked(2).min(*self.data.get_unchecked(3)))
let n1 = if self.get_0() < self.get_1() {
self.get_0()
} else {
self.get_1()
};
let n2 = if self.get_2() < self.get_3() {
self.get_2()
} else {
self.get_3()
};
if n1 < n2 {
n1
} else {
n2
}
}
pub fn h_max(&self) -> f32 {
unsafe {
self.data
.get_unchecked(0)
.max(*self.data.get_unchecked(1))
.max(self.data.get_unchecked(2).max(*self.data.get_unchecked(3)))
let n1 = if self.get_0() > self.get_1() {
self.get_0()
} else {
self.get_1()
};
let n2 = if self.get_2() > self.get_3() {
self.get_2()
} else {
self.get_3()
};
if n1 > n2 {
n1
} else {
n2
}
}
pub fn v_min(&self, other: Float4) -> Float4 {
unsafe {
Float4::new(self.data.get_unchecked(0).min(*other.data.get_unchecked(0)),
self.data.get_unchecked(1).min(*other.data.get_unchecked(1)),
self.data.get_unchecked(2).min(*other.data.get_unchecked(2)),
self.data.get_unchecked(3).min(*other.data.get_unchecked(3)))
}
Float4::new(if self.get_0() < other.get_0() {
self.get_0()
} else {
other.get_0()
},
if self.get_1() < other.get_1() {
self.get_1()
} else {
other.get_1()
},
if self.get_2() < other.get_2() {
self.get_2()
} else {
other.get_2()
},
if self.get_3() < other.get_3() {
self.get_3()
} else {
other.get_3()
})
}
pub fn v_max(&self, other: Float4) -> Float4 {
unsafe {
Float4::new(self.data.get_unchecked(0).max(*other.data.get_unchecked(0)),
self.data.get_unchecked(1).max(*other.data.get_unchecked(1)),
self.data.get_unchecked(2).max(*other.data.get_unchecked(2)),
self.data.get_unchecked(3).max(*other.data.get_unchecked(3)))
}
Float4::new(if self.get_0() > other.get_0() {
self.get_0()
} else {
other.get_0()
},
if self.get_1() > other.get_1() {
self.get_1()
} else {
other.get_1()
},
if self.get_2() > other.get_2() {
self.get_2()
} else {
other.get_2()
},
if self.get_3() > other.get_3() {
self.get_3()
} else {
other.get_3()
})
}
pub fn set_0(&mut self, n: f32) {
@ -124,12 +165,8 @@ impl IndexMut<usize> for Float4 {
impl PartialEq for Float4 {
fn eq(&self, other: &Float4) -> bool {
unsafe {
*self.data.get_unchecked(0) == *other.data.get_unchecked(0) &&
*self.data.get_unchecked(1) == *other.data.get_unchecked(1) &&
*self.data.get_unchecked(2) == *other.data.get_unchecked(2) &&
*self.data.get_unchecked(3) == *other.data.get_unchecked(3)
}
self.get_0() == other.get_0() && self.get_1() == other.get_1() &&
self.get_2() == other.get_2() && self.get_3() == other.get_3()
}
}
@ -138,13 +175,11 @@ impl Add for Float4 {
type Output = Float4;
fn add(self, other: Float4) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) + *other.data.get_unchecked(0),
*self.data.get_unchecked(1) + *other.data.get_unchecked(1),
*self.data.get_unchecked(2) + *other.data.get_unchecked(2),
*self.data.get_unchecked(3) + *other.data.get_unchecked(3)],
}
Float4 {
data: [self.get_0() + other.get_0(),
self.get_1() + other.get_1(),
self.get_2() + other.get_2(),
self.get_3() + other.get_3()],
}
}
}
@ -154,13 +189,11 @@ impl Sub for Float4 {
type Output = Float4;
fn sub(self, other: Float4) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) - *other.data.get_unchecked(0),
*self.data.get_unchecked(1) - *other.data.get_unchecked(1),
*self.data.get_unchecked(2) - *other.data.get_unchecked(2),
*self.data.get_unchecked(3) - *other.data.get_unchecked(3)],
}
Float4 {
data: [self.get_0() - other.get_0(),
self.get_1() - other.get_1(),
self.get_2() - other.get_2(),
self.get_3() - other.get_3()],
}
}
}
@ -170,13 +203,11 @@ impl Mul for Float4 {
type Output = Float4;
fn mul(self, other: Float4) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) * *other.data.get_unchecked(0),
*self.data.get_unchecked(1) * *other.data.get_unchecked(1),
*self.data.get_unchecked(2) * *other.data.get_unchecked(2),
*self.data.get_unchecked(3) * *other.data.get_unchecked(3)],
}
Float4 {
data: [self.get_0() * other.get_0(),
self.get_1() * other.get_1(),
self.get_2() * other.get_2(),
self.get_3() * other.get_3()],
}
}
}
@ -185,13 +216,11 @@ impl Mul<f32> for Float4 {
type Output = Float4;
fn mul(self, other: f32) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) * other,
*self.data.get_unchecked(1) * other,
*self.data.get_unchecked(2) * other,
*self.data.get_unchecked(3) * other],
}
Float4 {
data: [self.get_0() * other,
self.get_1() * other,
self.get_2() * other,
self.get_3() * other],
}
}
}
@ -201,13 +230,11 @@ impl Div for Float4 {
type Output = Float4;
fn div(self, other: Float4) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) / *other.data.get_unchecked(0),
*self.data.get_unchecked(1) / *other.data.get_unchecked(1),
*self.data.get_unchecked(2) / *other.data.get_unchecked(2),
*self.data.get_unchecked(3) / *other.data.get_unchecked(3)],
}
Float4 {
data: [self.get_0() / other.get_0(),
self.get_1() / other.get_1(),
self.get_2() / other.get_2(),
self.get_3() / other.get_3()],
}
}
}
@ -216,13 +243,11 @@ impl Div<f32> for Float4 {
type Output = Float4;
fn div(self, other: f32) -> Float4 {
unsafe {
Float4 {
data: [*self.data.get_unchecked(0) / other,
*self.data.get_unchecked(1) / other,
*self.data.get_unchecked(2) / other,
*self.data.get_unchecked(3) / other],
}
Float4 {
data: [self.get_0() / other,
self.get_1() / other,
self.get_2() / other,
self.get_3() / other],
}
}
}