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Fix compilation failure for arch other than amd64/i386

This commit is contained in:
jangko 2023-09-12 19:51:30 +07:00
parent d198ec031e
commit bfa299f3ae
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1 changed files with 9 additions and 6 deletions
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15
stint/private/primitives/addcarry_subborrow.nim
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@ -113,9 +113,11 @@ func addC*(cOut: var Carry, sum: var uint32, a, b: uint32, cIn: Carry) {.inline.
when X86:
cOut = addcarry_u32(cIn, a, b, sum)
else:
let dblPrec = uint64(cIn) + uint64(a) + uint64(b)
sum = uint32(dblPrec)
cOut = Carry(dblPrec shr 32)
# on arch e.g. arm: nim will complaints "Error: redefinition of 'dblPrec'"
# so we use dlbPrec2 here
let dblPrec2 = uint64(cIn) + uint64(a) + uint64(b)
sum = uint32(dblPrec2)
cOut = Carry(dblPrec2 shr 32)
func subB*(bOut: var Borrow, diff: var uint32, a, b: uint32, bIn: Borrow) {.inline.} =
## Substraction with borrow
@ -129,10 +131,11 @@ func subB*(bOut: var Borrow, diff: var uint32, a, b: uint32, bIn: Borrow) {.inli
when X86:
bOut = subborrow_u32(bIn, a, b, diff)
else:
let dblPrec = uint64(a) - uint64(b) - uint64(bIn)
diff = uint32(dblPrec)
# ditto
let dblPrec2 = uint64(a) - uint64(b) - uint64(bIn)
diff = uint32(dblPrec2)
# On borrow the high word will be 0b1111...1111 and needs to be masked
bOut = Borrow((dblPrec shr 32) and 1)
bOut = Borrow((dblPrec2 shr 32) and 1)
func addC*(cOut: var Carry, sum: var uint64, a, b: uint64, cIn: Carry) {.inline.} =
## Addition with carry