diff options
| author | Gavin Lam <gavin.oss@tutamail.com> | 2026-01-15 04:22:13 +0000 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2026-01-22 12:48:33 -0800 |
| commit | e9e05687dee08ba0f0fb07b076f1c3f47bb57f34 (patch) | |
| tree | 004cb6d4462d87c3ecee4f77758577cbf7c51bff /src/internal | |
| parent | 1996c22f0a58a32f5f415e1a6c84bcb305f04c36 (diff) | |
| download | go-e9e05687dee08ba0f0fb07b076f1c3f47bb57f34.tar.xz | |
internal/runtime: remove math.Mul64
internal/runtime/math.Mul64 is a copy of math/bits.Mul64 and redundant.
Change-Id: I4dd2ab531a32da97839c6b45cf90df6430811967
GitHub-Last-Rev: 1a73e16049ee346ccfa8f052856e49e10e202d70
GitHub-Pull-Request: golang/go#77187
Reviewed-on: https://go-review.googlesource.com/c/go/+/736500
Auto-Submit: Keith Randall <khr@google.com>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'src/internal')
| -rw-r--r-- | src/internal/runtime/math/math.go | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/src/internal/runtime/math/math.go b/src/internal/runtime/math/math.go index 0af5aa3f76..e3b277a505 100644 --- a/src/internal/runtime/math/math.go +++ b/src/internal/runtime/math/math.go @@ -25,27 +25,6 @@ func MulUintptr(a, b uintptr) (uintptr, bool) { return a * b, overflow } -// Mul64 returns the 128-bit product of x and y: (hi, lo) = x * y -// with the product bits' upper half returned in hi and the lower -// half returned in lo. -// This is a copy from math/bits.Mul64 -// On supported platforms this is an intrinsic lowered by the compiler. -func Mul64(x, y uint64) (hi, lo uint64) { - const mask32 = 1<<32 - 1 - x0 := x & mask32 - x1 := x >> 32 - y0 := y & mask32 - y1 := y >> 32 - w0 := x0 * y0 - t := x1*y0 + w0>>32 - w1 := t & mask32 - w2 := t >> 32 - w1 += x0 * y1 - hi = x1*y1 + w2 + w1>>32 - lo = x * y - return -} - // Add64 returns the sum with carry of x, y and carry: sum = x + y + carry. // The carry input must be 0 or 1; otherwise the behavior is undefined. // The carryOut output is guaranteed to be 0 or 1. |