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runtime: use divRoundUp

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There are a handful of places where the runtime wants to round up the
result of a division. We just introduced a helper to do this. This CL
replaces all of the hand-coded round-ups (that I could find) with this
helper.

Change-Id: I465d152157ff0f3cad40c0aa57491e4f2de510ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/224385
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Austin Clements 2020-03-20 11:37:54 -04:00
parent ab5a40c5e3
commit d965bb6130
4 changed files with 6 additions and 6 deletions
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4
src/runtime/malloc.go
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@ -1035,9 +1035,9 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer {
} else {
var sizeclass uint8
if size <= smallSizeMax-8 {
sizeclass = size_to_class8[(size+smallSizeDiv-1)/smallSizeDiv]
sizeclass = size_to_class8[divRoundUp(size, smallSizeDiv)]
} else {
sizeclass = size_to_class128[(size-smallSizeMax+largeSizeDiv-1)/largeSizeDiv]
sizeclass = size_to_class128[divRoundUp(size-smallSizeMax, largeSizeDiv)]
}
size = uintptr(class_to_size[sizeclass])
spc := makeSpanClass(sizeclass, noscan)