1 // Copyright 2010 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4 5 //go:build !math_big_pure_go
6 7 //go:generate go test ./internal/asmgen -generate
8 9 package big
10 11 import _ "unsafe" // for linkname
12 13 // implemented in arith_$GOARCH.s
14 15 // addVV should be an internal detail,
16 // but widely used packages access it using linkname.
17 // Notable members of the hall of shame include:
18 // - github.com/remyoudompheng/bigfft
19 //
20 // Do not remove or change the type signature.
21 // See go.dev/issue/67401.
22 //
23 //go:linkname addVV
24 //go:noescape
25 func addVV(z, x, y []Word) (c Word)
26 27 // subVV should be an internal detail,
28 // but widely used packages access it using linkname.
29 // Notable members of the hall of shame include:
30 // - github.com/remyoudompheng/bigfft
31 //
32 // Do not remove or change the type signature.
33 // See go.dev/issue/67401.
34 //
35 //go:linkname subVV
36 //go:noescape
37 func subVV(z, x, y []Word) (c Word)
38 39 // shlVU should be an internal detail (and a stale one at that),
40 // but widely used packages access it using linkname.
41 // Notable members of the hall of shame include:
42 // - github.com/remyoudompheng/bigfft
43 //
44 // Do not remove or change the type signature.
45 // See go.dev/issue/67401.
46 //
47 //go:linkname shlVU
48 func shlVU(z, x []Word, s uint) (c Word) {
49 if s == 0 {
50 copy(z, x)
51 return 0
52 }
53 return lshVU(z, x, s)
54 }
55 56 // lshVU sets z = x<<s, returning the high bits c. 1 ≤ s ≤ _B-1.
57 //
58 //go:noescape
59 func lshVU(z, x []Word, s uint) (c Word)
60 61 // rshVU sets z = x>>s, returning the low bits c. 1 ≤ s ≤ _B-1.
62 //
63 //go:noescape
64 func rshVU(z, x []Word, s uint) (c Word)
65 66 // mulAddVWW should be an internal detail,
67 // but widely used packages access it using linkname.
68 // Notable members of the hall of shame include:
69 // - github.com/remyoudompheng/bigfft
70 //
71 // Do not remove or change the type signature.
72 // See go.dev/issue/67401.
73 //
74 //go:linkname mulAddVWW
75 //go:noescape
76 func mulAddVWW(z, x []Word, m, a Word) (c Word)
77 78 // addMulVVW should be an internal detail (and a stale one at that),
79 // but widely used packages access it using linkname.
80 // Notable members of the hall of shame include:
81 // - github.com/remyoudompheng/bigfft
82 //
83 // Do not remove or change the type signature.
84 // See go.dev/issue/67401.
85 //
86 //go:linkname addMulVVW
87 func addMulVVW(z, x []Word, y Word) (c Word) {
88 return addMulVVWW(z, z, x, y, 0)
89 }
90 91 // addMulVVWW sets z = x+y*m+a.
92 //
93 //go:noescape
94 func addMulVVWW(z, x, y []Word, m, a Word) (c Word)
95