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address bigendian bug

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This commit is contained in:
araq
2026-03-16 07:52:43 +01:00
parent 43ef842b36
commit ce555a2fb9
1 changed files with 5 additions and 7 deletions
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12
lib/system/strs_v3.nim
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@@ -96,13 +96,11 @@ proc cmpShortInline(abytes, bbytes: uint; aslen, bslen: int): int {.inline.} =
aslen - bslen
template ssLen(s: SmallString): int =
## Load slen via a direct byte access. A byte load (movzx) lets the C compiler
## prove that slen is at offset 0, distinct from inline char writes at offsets 1+,
## enabling register-caching of slen across char-write loops (e.g. nimAddCharV1).
when system.cpuEndian == littleEndian:
int(cast[ptr byte](unsafeAddr s.bytes)[])
else:
int(cast[ptr byte](cast[uint](unsafeAddr s.bytes) + uint(sizeof(uint) - 1))[])
## Load slen via a direct byte access at offset 0 (valid on both LE and BE).
## A byte load (movzx) lets the C compiler prove that slen is at offset 0,
## distinct from inline char writes at offsets 1+, enabling register-caching
## of slen across char-write loops (e.g. nimAddCharV1).
int(cast[ptr byte](unsafeAddr s.bytes)[])
template setSSLen(s: var SmallString; v: int) =
# Single byte store — equivalent to old `s.slen = byte(v)`.