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Use fmadd method in Jakob spectrum eval.

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This commit is contained in:
Nathan Vegdahl 2019-06-19 17:49:52 +09:00
parent b3cc5c070a
commit 5eeaec0a8b
1 changed files with 4 additions and 2 deletions
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6
sub_crates/spectral_upsampling/src/jakob.rs
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@ -11,7 +11,7 @@ const RGB2SPEC_N_COEFFS: usize = 3;
const TABLE_RES: usize = 64; const TABLE_RES: usize = 64;
// For the small table, what is the middle value used? // For the small table, what is the middle value used?
const MID_VALUE: f32 = 0.434; const MID_VALUE: f32 = 0.5;
lazy_static! { lazy_static! {
static ref ACES_TABLE: RGB2Spec = rgb2spec_load(""); static ref ACES_TABLE: RGB2Spec = rgb2spec_load("");
@ -257,12 +257,14 @@ pub struct RGB2Spec {
//============================================================ //============================================================
// Coefficient -> eval functions // Coefficient -> eval functions
#[inline(always)]
fn rgb2spec_fma(a: f32, b: f32, c: f32) -> f32 { fn rgb2spec_fma(a: f32, b: f32, c: f32) -> f32 {
a * b + c a * b + c
} }
#[inline(always)]
fn rgb2spec_fma_4(a: Float4, b: Float4, c: Float4) -> Float4 { fn rgb2spec_fma_4(a: Float4, b: Float4, c: Float4) -> Float4 {
a * b + c a.fmadd(b, c)
} }
fn rgb2spec_eval(coeff: [f32; RGB2SPEC_N_COEFFS], lambda: f32) -> f32 { fn rgb2spec_eval(coeff: [f32; RGB2SPEC_N_COEFFS], lambda: f32) -> f32 {