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Do manual byte swapping for endianness in lb_big_int_to_llvm

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gingerBill
2021-07-13 18:15:47 +01:00
parent 698eeaf7c3
commit da9870c77d
1 changed files with 12 additions and 5 deletions
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src/llvm_backend.cpp
+12 -5
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@@ -6373,11 +6373,6 @@ LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, BigInt const *
size_t size = 1;
size_t nails = 0;
mp_endian endian = MP_NATIVE_ENDIAN;
if (is_type_endian_little(original_type)) {
endian = MP_LITTLE_ENDIAN;
} else if (is_type_endian_big(original_type)) {
endian = MP_BIG_ENDIAN;
}
max_count = mp_pack_count(a, nails, size);
rop = cast(u8 *)gb_alloc_align(permanent_allocator(), max_count, gb_align_of(u64));
@@ -6387,6 +6382,18 @@ LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, BigInt const *
a);
GB_ASSERT(err == MP_OKAY);
i64 sz = type_size_of(original_type);
if (is_type_different_to_arch_endianness(original_type)) {
GB_ASSERT(sz == cast(i64)written);
for (i64 i = 0; i < sz/2; i++) {
u8 tmp = rop[i];
rop[i] = rop[sz-1-i];
rop[sz-1-i] = tmp;
}
}
LLVMValueRef value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), cast(unsigned)((written+7)/8), cast(u64 *)rop);
if (big_int_is_neg(a)) {
value = LLVMConstNeg(value);