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update patch config to minimize git diff
1 parent 480bedf commit 3fc6064

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2 files changed

+36
-39
lines changed

2 files changed

+36
-39
lines changed

p256/src/arithmetic/scalar.rs

Lines changed: 35 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -389,55 +389,52 @@ impl Invert for Scalar {
389389
fn invert_vartime(&self) -> CtOption<Self> {
390390
#[cfg(all(target_os = "zkvm", target_arch = "riscv32"))]
391391
{
392-
self.invert()
392+
return self.invert();
393393
}
394394

395-
#[cfg(not(all(target_os = "zkvm", target_arch = "riscv32")))]
396-
{
397-
let mut u = *self;
398-
let mut v = Self(MODULUS);
399-
let mut A = Self::ONE;
400-
let mut C = Self::ZERO;
401-
402-
while !bool::from(u.is_zero()) {
403-
// u-loop
404-
while bool::from(u.is_even()) {
405-
u >>= 1;
406-
407-
let was_odd: bool = A.is_odd().into();
408-
A >>= 1;
409-
410-
if was_odd {
411-
A += FRAC_MODULUS_2;
412-
A += Self::ONE;
413-
}
414-
}
395+
let mut u = *self;
396+
let mut v = Self(MODULUS);
397+
let mut A = Self::ONE;
398+
let mut C = Self::ZERO;
415399

416-
// v-loop
417-
while bool::from(v.is_even()) {
418-
v >>= 1;
400+
while !bool::from(u.is_zero()) {
401+
// u-loop
402+
while bool::from(u.is_even()) {
403+
u >>= 1;
419404

420-
let was_odd: bool = C.is_odd().into();
421-
C >>= 1;
405+
let was_odd: bool = A.is_odd().into();
406+
A >>= 1;
422407

423-
if was_odd {
424-
C += FRAC_MODULUS_2;
425-
C += Self::ONE;
426-
}
408+
if was_odd {
409+
A += FRAC_MODULUS_2;
410+
A += Self::ONE;
427411
}
412+
}
413+
414+
// v-loop
415+
while bool::from(v.is_even()) {
416+
v >>= 1;
428417

429-
// sub-step
430-
if u >= v {
431-
u -= &v;
432-
A -= &C;
433-
} else {
434-
v -= &u;
435-
C -= &A;
418+
let was_odd: bool = C.is_odd().into();
419+
C >>= 1;
420+
421+
if was_odd {
422+
C += FRAC_MODULUS_2;
423+
C += Self::ONE;
436424
}
437425
}
438426

439-
CtOption::new(C, !self.is_zero())
427+
// sub-step
428+
if u >= v {
429+
u -= &v;
430+
A -= &C;
431+
} else {
432+
v -= &u;
433+
C -= &A;
434+
}
440435
}
436+
437+
CtOption::new(C, !self.is_zero())
441438
}
442439
}
443440

p256/src/lib.rs

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
// #![no_std]
1+
#![no_std]
22
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
33
#![doc = include_str!("../README.md")]
44
#![doc(

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