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sm9/bn256: add test cases and refactoring

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This commit is contained in:
emmansun 2023-06-24 09:38:45 +08:00
parent b84bd335dc
commit 9b4a77482a
4 changed files with 73 additions and 109 deletions
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2
sm9/bn256/gfp.go
View File

@ -78,7 +78,7 @@ func (e *gfP) exp(f *gfP, bits [4]uint64) {
if (bits[word]>>bit)&1 == 1 {
gfpMul(sum, sum, power)
}
gfpMul(power, power, power)
gfpSqr(power, power, 1)
}
}

4
sm9/bn256/gfp2.go
View File

@ -218,9 +218,9 @@ func (e *gfP2) Invert(a *gfP2) *gfP2 {
// See "Implementing cryptographic pairings", M. Scott, section 3.2.
// ftp://136.206.11.249/pub/crypto/pairings.pdf
t1, t2, t3 := &gfP{}, &gfP{}, &gfP{}
gfpMul(t1, &a.x, &a.x)
gfpSqr(t1, &a.x, 1)
gfpAdd(t3, t1, t1)
gfpMul(t2, &a.y, &a.y)
gfpSqr(t2, &a.y, 1)
gfpAdd(t3, t3, t2)
inv := &gfP{}

136
sm9/bn256/gfp_amd64.s
View File

@ -28,13 +28,12 @@
MOVQ 16+r, a2 \
MOVQ 24+r, a3
#define gfpCarry(a0,a1,a2,a3,a4, b0,b1,b2,b3,b4) \
#define gfpCarry(a0,a1,a2,a3, b0,b1,b2,b3,b4) \
\ // b = a-p
MOVQ a0, b0 \
MOVQ a1, b1 \
MOVQ a2, b2 \
MOVQ a3, b3 \
MOVQ a4, b4 \
\
SUBQ ·p2+0(SB), b0 \
SBBQ ·p2+8(SB), b1 \
@ -49,6 +48,25 @@
CMOVQCC b2, a2 \
CMOVQCC b3, a3
#define gfpCarryWithoutCarry(a0,a1,a2,a3, b0,b1,b2,b3) \
\ // b = a-p
MOVQ a0, b0 \
MOVQ a1, b1 \
MOVQ a2, b2 \
MOVQ a3, b3 \
\
SUBQ ·p2+0(SB), b0 \
SBBQ ·p2+8(SB), b1 \
SBBQ ·p2+16(SB), b2 \
SBBQ ·p2+24(SB), b3 \
\
\ // if b is negative then return a
\ // else return b
CMOVQCC b0, a0 \
CMOVQCC b1, a1 \
CMOVQCC b2, a2 \
CMOVQCC b3, a3
TEXT ·gfpNeg(SB),0,$0-16
MOVQ ·p2+0(SB), R8
MOVQ ·p2+8(SB), R9
@ -61,8 +79,7 @@ TEXT ·gfpNeg(SB),0,$0-16
SBBQ 16(DI), R10
SBBQ 24(DI), R11
MOVQ $0, AX
gfpCarry(R8,R9,R10,R11,AX, R12,R13,R14,CX,BX)
gfpCarryWithoutCarry(R8,R9,R10,R11, R12,R13,R14,CX)
MOVQ c+0(FP), DI
storeBlock(R8,R9,R10,R11, 0(DI))
@ -81,7 +98,7 @@ TEXT ·gfpAdd(SB),0,$0-24
ADCQ 24(SI), R11
ADCQ $0, R12
gfpCarry(R8,R9,R10,R11,R12, R13,R14,CX,AX,BX)
gfpCarry(R8,R9,R10,R11, R13,R14,CX,AX,R12)
MOVQ c+0(FP), DI
storeBlock(R8,R9,R10,R11, 0(DI))
@ -306,26 +323,8 @@ TEXT ·gfpMul(SB),0,$0-24
ADCQ t1, acc1
ADCQ $0, acc2
// Copy result [255:0]
MOVQ acc4, x_ptr
MOVQ acc5, acc3
MOVQ acc0, t0
MOVQ acc1, t1
// Subtract p2
SUBQ ·p2+0x00(SB), acc4
SBBQ ·p2+0x08(SB) ,acc5
SBBQ ·p2+0x10(SB), acc0
SBBQ ·p2+0x18(SB), acc1
SBBQ $0, acc2
CMOVQCS x_ptr, acc4
CMOVQCS acc3, acc5
CMOVQCS t0, acc0
CMOVQCS t1, acc1
MOVQ acc4, (8*0)(res_ptr)
MOVQ acc5, (8*1)(res_ptr)
MOVQ acc0, (8*2)(res_ptr)
MOVQ acc1, (8*3)(res_ptr)
gfpCarry(acc4,acc5,acc0,acc1, x_ptr,acc3,t0,t1,acc2)
storeBlock(acc4,acc5,acc0,acc1, 0(res_ptr))
RET
nobmi2Mul:
@ -588,26 +587,8 @@ nobmi2Mul:
ADCQ DX, acc1
ADCQ $0, acc2
// Copy result [255:0]
MOVQ acc4, x_ptr
MOVQ acc5, acc3
MOVQ acc0, t0
MOVQ acc1, t1
// Subtract p2
SUBQ ·p2+0x00(SB), acc4
SBBQ ·p2+0x08(SB) ,acc5
SBBQ ·p2+0x10(SB), acc0
SBBQ ·p2+0x18(SB), acc1
SBBQ $0, acc2
CMOVQCS x_ptr, acc4
CMOVQCS acc3, acc5
CMOVQCS t0, acc0
CMOVQCS t1, acc1
MOVQ acc4, (8*0)(res_ptr)
MOVQ acc5, (8*1)(res_ptr)
MOVQ acc0, (8*2)(res_ptr)
MOVQ acc1, (8*3)(res_ptr)
gfpCarry(acc4,acc5,acc0,acc1, x_ptr,acc3,t0,t1,acc2)
storeBlock(acc4,acc5,acc0,acc1, 0(res_ptr))
RET
@ -780,26 +761,9 @@ gfpSqrLoopBMI2:
ADCQ x_ptr, acc3
ADCQ $0, t0
MOVQ acc0, acc4
MOVQ acc1, acc5
MOVQ acc2, y_ptr
MOVQ acc3, t1
// Subtract p2
SUBQ ·p2+0x00(SB), acc0
SBBQ ·p2+0x08(SB) ,acc1
SBBQ ·p2+0x10(SB), acc2
SBBQ ·p2+0x18(SB), acc3
SBBQ $0, t0
gfpCarry(acc0,acc1,acc2,acc3, acc4,acc5,y_ptr,t1,t0)
storeBlock(acc0,acc1,acc2,acc3, 0(res_ptr))
CMOVQCS acc4, acc0
CMOVQCS acc5, acc1
CMOVQCS y_ptr, acc2
CMOVQCS t1, acc3
MOVQ acc0, (8*0)(res_ptr)
MOVQ acc1, (8*1)(res_ptr)
MOVQ acc2, (8*2)(res_ptr)
MOVQ acc3, (8*3)(res_ptr)
MOVQ res_ptr, x_ptr
DECQ BX
JNE gfpSqrLoopBMI2
@ -1039,26 +1003,8 @@ gfpSqrLoop:
ADCQ x_ptr, acc3
ADCQ $0, t0
MOVQ acc0, acc4
MOVQ acc1, acc5
MOVQ acc2, y_ptr
MOVQ acc3, t1
// Subtract p2
SUBQ ·p2+0x00(SB), acc0
SBBQ ·p2+0x08(SB) ,acc1
SBBQ ·p2+0x10(SB), acc2
SBBQ ·p2+0x18(SB), acc3
SBBQ $0, t0
CMOVQCS acc4, acc0
CMOVQCS acc5, acc1
CMOVQCS y_ptr, acc2
CMOVQCS t1, acc3
MOVQ acc0, (8*0)(res_ptr)
MOVQ acc1, (8*1)(res_ptr)
MOVQ acc2, (8*2)(res_ptr)
MOVQ acc3, (8*3)(res_ptr)
gfpCarry(acc0,acc1,acc2,acc3, acc4,acc5,y_ptr,t1,t0)
storeBlock(acc0,acc1,acc2,acc3, 0(res_ptr))
MOVQ res_ptr, x_ptr
DECQ BX
JNE gfpSqrLoop
@ -1222,24 +1168,6 @@ TEXT ·gfpFromMont(SB),NOSPLIT,$0
ADDQ AX, acc0
ADCQ DX, acc1
MOVQ acc4, x_ptr
MOVQ acc5, acc3
MOVQ acc0, t0
MOVQ acc1, t1
SUBQ ·p2+0x00(SB), acc4
SBBQ ·p2+0x08(SB) ,acc5
SBBQ ·p2+0x10(SB), acc0
SBBQ ·p2+0x18(SB), acc1
CMOVQCS x_ptr, acc4
CMOVQCS acc3, acc5
CMOVQCS t0, acc0
CMOVQCS t1, acc1
MOVQ acc4, (8*0)(res_ptr)
MOVQ acc5, (8*1)(res_ptr)
MOVQ acc0, (8*2)(res_ptr)
MOVQ acc1, (8*3)(res_ptr)
gfpCarryWithoutCarry(acc4, acc5, acc0, acc1, x_ptr, acc3, t0, t1)
storeBlock(acc4,acc5,acc0,acc1, 0(res_ptr))
RET

40
sm9/bn256/gfp_test.go
View File

@ -36,10 +36,26 @@ func Test_gfpBasicOperations(t *testing.T) {
t.Errorf("mul not same")
}
gfpMul(ret, ret, ret)
if *expectedMul2 != *ret {
ret1, ret2 := &gfP{}, &gfP{}
gfpMul(ret1, ret, ret)
if *ret1 != *expectedMul2 {
t.Errorf("mul not same")
}
gfpMul(ret1, ret1, ret1)
gfpSqr(ret2, ret, 2)
if *ret1 != *ret2 {
t.Errorf("mul/sqr not same")
}
}
func TestFromMont(t *testing.T) {
x := fromBigInt(bigFromHex("85AEF3D078640C98597B6027B441A01FF1DD2C190F5E93C454806C11D8806141"))
ret1, ret2 := &gfP{}, &gfP{}
gfpFromMont(ret1, x)
gfpMul(ret2, x, &gfP{1})
if *ret1 != *ret2 {
t.Errorf("mul/fromMont not same")
}
}
func TestGfpExp(t *testing.T) {
@ -140,3 +156,23 @@ func TestInvert(t *testing.T) {
t.Errorf("got %v, expected %v", y, one)
}
}
func BenchmarkGfPMul(b *testing.B) {
x := fromBigInt(bigFromHex("9093a2b979e6186f43a9b28d41ba644d533377f2ede8c66b19774bf4a9c7a596"))
b.ReportAllocs()
b.ResetTimer()
ret := &gfP{}
for i := 0; i < b.N; i++ {
gfpMul(ret, x, x)
}
}
func BenchmarkGfPSqr(b *testing.B) {
x := fromBigInt(bigFromHex("9093a2b979e6186f43a9b28d41ba644d533377f2ede8c66b19774bf4a9c7a596"))
b.ReportAllocs()
b.ResetTimer()
ret := &gfP{}
for i := 0; i < b.N; i++ {
gfpSqr(ret, x, 1)
}
}