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Use go:linkname instead of asm jmp. #15

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merged 1 commit into from
Jan 26, 2023
Merged

Use go:linkname instead of asm jmp. #15

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36 changes: 0 additions & 36 deletions arith_386.s
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38 changes: 0 additions & 38 deletions arith_amd64.s
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36 changes: 0 additions & 36 deletions arith_arm.s
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36 changes: 0 additions & 36 deletions arith_arm64.s
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21 changes: 19 additions & 2 deletions arith_decl.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,30 @@

package bigfft

import . "math/big"
import (
"math/big"
_ "unsafe"
)

// implemented in arith_$GOARCH.s
type Word = big.Word

//go:linkname addVV math/big.addVV
func addVV(z, x, y []Word) (c Word)

//go:linkname subVV math/big.subVV
func subVV(z, x, y []Word) (c Word)

//go:linkname addVW math/big.addVW
func addVW(z, x []Word, y Word) (c Word)

//go:linkname subVW math/big.subVW
func subVW(z, x []Word, y Word) (c Word)

//go:linkname shlVU math/big.shlVU
func shlVU(z, x []Word, s uint) (c Word)

//go:linkname mulAddVWW math/big.mulAddVWW
func mulAddVWW(z, x []Word, y, r Word) (c Word)

//go:linkname addMulVVW math/big.addMulVVW
func addMulVVW(z, x []Word, y Word) (c Word)
40 changes: 0 additions & 40 deletions arith_mips64x.s
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40 changes: 0 additions & 40 deletions arith_mipsx.s
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38 changes: 0 additions & 38 deletions arith_ppc64x.s
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37 changes: 0 additions & 37 deletions arith_s390x.s
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14 changes: 9 additions & 5 deletions fermat_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,14 @@ package bigfft

import (
"fmt"
. "math/big"
"math/big"
"testing"
)

type (
Int = big.Int
)

// parseHex reads an hex-formatted number modulo 2^bits+1.
func parseHex(s string, bits int) fermat {
z := new(Int)
Expand Down Expand Up @@ -35,9 +39,9 @@ func TestFermatShift(t *testing.T) {
for i := 0; i < n; i++ {
f[i] = Word(rnd.Int63())
}
b := NewInt(1)
b := big.NewInt(1)
b = b.Lsh(b, uint(n*_W))
b = b.Add(b, NewInt(1))
b = b.Add(b, big.NewInt(1))
z := make(fermat, len(f)) // Test with uninitialized z.
for shift := -2048; shift < 2048; shift++ {
z.Shift(f, shift)
Expand All @@ -61,9 +65,9 @@ func TestFermatShiftHalf(t *testing.T) {
for i := 0; i < n; i++ {
f[i] = ^Word(0)
}
b := NewInt(1)
b := big.NewInt(1)
b = b.Lsh(b, uint(n*_W))
b = b.Add(b, NewInt(1))
b = b.Add(b, big.NewInt(1))
z := make(fermat, len(f)) // Test with uninitialized z.
tmp := make(fermat, len(f))
tmp2 := make(fermat, len(f))
Expand Down
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