add x86_64 target

src/bn256/fq.rs

@@ -7,7 +7,7 @@ use rand::RngCore;
 use std::io::{self, Read, Write};
 use subtle::{Choice, ConditionallySelectable, ConstantTimeEq, CtOption};
 
-#[cfg(feature = "asm")]
+#[cfg(all(feature = "asm", target_arch = "x86_64"))]
 use super::assembly::assembly_field;
 
 #[derive(Clone, Copy, Eq)]
@@ -214,7 +214,7 @@ impl<'a, 'b> Mul<&'b Fq> for &'a Fq {
 impl_binops_additive!(Fq, Fq);
 impl_binops_multiplicative!(Fq, Fq);
 
-#[cfg(feature = "asm")]
+#[cfg(all(feature = "asm", target_arch = "x86_64"))]
 assembly_field!(Fq, MODULUS, INV);
 
 impl Fq {
@@ -254,10 +254,10 @@ impl Fq {
     pub fn to_bytes(&self) -> [u8; 32] {
         // Turn into canonical form by computing
         // (a.R) / R = a
-        #[cfg(feature = "asm")]
+        #[cfg(all(feature = "asm", target_arch = "x86_64"))]
         let tmp = Fq::montgomery_reduce(&[self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0]);
 
-        #[cfg(not(feature = "asm"))]
+        #[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
         let tmp = Fq::montgomery_reduce(self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0);
 
         let mut res = [0; 32];
@@ -289,7 +289,7 @@ impl Fq {
     }
 }
 
-#[cfg(not(feature = "asm"))]
+#[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
 impl Fq {
     /// Returns zero, the additive identity.
     #[inline]
@@ -598,11 +598,11 @@ impl ff::PrimeField for Fq {
     fn to_repr(&self) -> Self::Repr {
         // Turn into canonical form by computing
         // (a.R) / R = a
-        #[cfg(feature = "asm")]
+        #[cfg(all(feature = "asm", target_arch = "x86_64"))]
         let tmp =
             Self::montgomery_reduce(&[self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0]);
 
-        #[cfg(not(feature = "asm"))]
+        #[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
         let tmp = Self::montgomery_reduce(self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0);
 
         let mut res = [0; 32];
@@ -690,10 +690,10 @@ impl FieldExt for Fq {
     /// Gets the lower 128 bits of this field element when expressed
     /// canonically.
     fn get_lower_128(&self) -> u128 {
-        #[cfg(feature = "asm")]
+        #[cfg(all(feature = "asm", target_arch = "x86_64"))]
         let tmp = Fq::montgomery_reduce(&[self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0]);
 
-        #[cfg(not(feature = "asm"))]
+        #[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
         let tmp = Fq::montgomery_reduce(self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0);
 
         u128::from(tmp.0[0]) | (u128::from(tmp.0[1]) << 64)

src/bn256/fr.rs

@@ -8,7 +8,7 @@ use subtle::{Choice, ConditionallySelectable, ConstantTimeEq, CtOption};
 
 use crate::arithmetic::{adc, mac, sbb, BaseExt, FieldExt, Group};
 
-#[cfg(feature = "asm")]
+#[cfg(all(feature = "asm", target_arch = "x86_64"))]
 use super::assembly::assembly_field;
 
 #[derive(Clone, Copy, Eq, Hash)]
@@ -222,7 +222,7 @@ impl<'a, 'b> Mul<&'b Fr> for &'a Fr {
 impl_binops_additive!(Fr, Fr);
 impl_binops_multiplicative!(Fr, Fr);
 
-#[cfg(feature = "asm")]
+#[cfg(all(feature = "asm", target_arch = "x86_64"))]
 assembly_field!(Fr, MODULUS, INV);
 
 impl Fr {
@@ -231,7 +231,7 @@ impl Fr {
     }
 }
 
-#[cfg(not(feature = "asm"))]
+#[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
 impl Fr {
     /// Returns zero, the additive identity.
     #[inline]
@@ -538,10 +538,10 @@ impl ff::PrimeField for Fr {
     fn to_repr(&self) -> Self::Repr {
         // Turn into canonical form by computing
         // (a.R) / R = a
-        #[cfg(feature = "asm")]
+        #[cfg(all(feature = "asm", target_arch = "x86_64"))]
         let tmp = Fr::montgomery_reduce(&[self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0]);
 
-        #[cfg(not(feature = "asm"))]
+        #[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
         let tmp = Fr::montgomery_reduce(self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0);
 
         let mut res = [0; 32];
@@ -672,10 +672,10 @@ impl FieldExt for Fr {
     /// Gets the lower 128 bits of this field element when expressed
     /// canonically.
     fn get_lower_128(&self) -> u128 {
-        #[cfg(feature = "asm")]
+        #[cfg(all(feature = "asm", target_arch = "x86_64"))]
         let tmp = Fr::montgomery_reduce(&[self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0]);
 
-        #[cfg(not(feature = "asm"))]
+        #[cfg(any(not(feature = "asm"), not(target_arch = "x86_64")))]
         let tmp = Fr::montgomery_reduce(self.0[0], self.0[1], self.0[2], self.0[3], 0, 0, 0, 0);
 
         u128::from(tmp.0[0]) | (u128::from(tmp.0[1]) << 64)

src/bn256/mod.rs

@@ -6,7 +6,7 @@ mod fq6;
 mod fr;
 mod g;
 
-#[cfg(feature = "asm")]
+#[cfg(all(feature = "asm", target_arch = "x86_64"))]
 mod assembly;
 
 pub use engine::*;