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move frobenius macros

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Mamy André-Ratsimbazafy 2020-09-27 15:06:16 +02:00
parent fd45a790eb
commit e676e06959
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2 changed files with 29 additions and 22 deletions
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25
constantine/curves/constants_frobenius.nim
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@ -7,13 +7,28 @@
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
std/macros,
../config/curves,
./bls12_377_frobenius,
./bls12_381_frobenius,
./bn254_nogami_frobenius,
./bn254_snarks_frobenius
export
bls12_377_frobenius,
bls12_381_frobenius,
bn254_nogami_frobenius,
bn254_snarks_frobenius
{.experimental: "dynamicBindSym".}
macro frobMapConst*(C: static Curve, coef, p_pow: static int): untyped =
## Access the field Frobenius map a -> a^(p^p_pow)
## Call with
## frobMapConst(Curve, coef, p_pow)
##
## With pow the
return nnkBracketExpr.newTree(
nnkBracketExpr.newTree(
bindSym("FrobMapConst_" & $C),
newLit(p_pow-1)
),
newLit coef
)
macro frobPsiConst*(C: static Curve, psipow, coefpow: static int): untyped =
return bindSym("FrobPsiConst_" & $C & "_psi" & $psipow & "_coef" & $coefpow)

26
constantine/isogeny/frobenius.nim
View File

@ -67,17 +67,12 @@ template mulCheckSparse[Fp2](a: var Fp2, b: Fp2) =
# Frobenius map - on extension fields
# -----------------------------------------------------------------
{.experimental: "dynamicBindSym".}
macro frobMapConst(C: static Curve): untyped =
return bindSym("FrobMapConst_" & $C)
func frobenius_map*[C](r: var Fp4[C], a: Fp4[C], k: static int = 1) {.inline.} =
## Computes a^(p^k)
## The p-power frobenius automorphism on 𝔽p4
r.c0.frobenius_map(a.c0, k)
r.c1.frobenius_map(a.c1, k)
r.c1.mulCheckSparse frobMapConst(C)[k-1][3]
r.c1.mulCheckSparse frobMapConst(C, 3, k)
func frobenius_map*[C](r: var Fp6[C], a: Fp6[C], k: static int = 1) {.inline.} =
## Computes a^(p^k)
@ -85,8 +80,8 @@ func frobenius_map*[C](r: var Fp6[C], a: Fp6[C], k: static int = 1) {.inline.} =
r.c0.frobenius_map(a.c0, k)
r.c1.frobenius_map(a.c1, k)
r.c2.frobenius_map(a.c2, k)
r.c1.mulCheckSparse frobMapConst(C)[k-1][2]
r.c2.mulCheckSparse frobMapConst(C)[k-1][4]
r.c1.mulCheckSparse frobMapConst(C, 2, k)
r.c2.mulCheckSparse frobMapConst(C, 4, k)
func frobenius_map*[C](r: var Fp12[C], a: Fp12[C], k: static int = 1) {.inline.} =
## Computes a^(p^k)
@ -96,12 +91,12 @@ func frobenius_map*[C](r: var Fp12[C], a: Fp12[C], k: static int = 1) {.inline.}
for r_fp2, a_fp2 in fields(r_fp4, a_fp4):
r_fp2.frobenius_map(a_fp2, k)
r.c0.c0.mulCheckSparse frobMapConst(C)[k-1][0]
r.c0.c1.mulCheckSparse frobMapConst(C)[k-1][3]
r.c1.c0.mulCheckSparse frobMapConst(C)[k-1][1]
r.c1.c1.mulCheckSparse frobMapConst(C)[k-1][4]
r.c2.c0.mulCheckSparse frobMapConst(C)[k-1][2]
r.c2.c1.mulCheckSparse frobMapConst(C)[k-1][5]
r.c0.c0.mulCheckSparse frobMapConst(C, 0, k)
r.c0.c1.mulCheckSparse frobMapConst(C, 3, k)
r.c1.c0.mulCheckSparse frobMapConst(C, 1, k)
r.c1.c1.mulCheckSparse frobMapConst(C, 4, k)
r.c2.c0.mulCheckSparse frobMapConst(C, 2, k)
r.c2.c1.mulCheckSparse frobMapConst(C, 5, k)
# ψ (Psi) - Untwist-Frobenius-Twist Endomorphisms on twisted curves
# -----------------------------------------------------------------
@ -111,9 +106,6 @@ func frobenius_map*[C](r: var Fp12[C], a: Fp12[C], k: static int = 1) {.inline.}
# with SNR the sextic non-residue
#
macro frobPsiConst(C: static Curve, psipow, coefpow: static int): untyped =
return bindSym("FrobPsiConst_" & $C & "_psi" & $psipow & "_coef" & $coefpow)
func frobenius_psi*[PointG2](r: var PointG2, P: PointG2) =
## "Untwist-Frobenius-Twist" endomorphism
## r = ψ(P)