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Correct lb_big_int_to_llvm

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gingerBill
2021-07-13 18:32:53 +01:00
parent a745bb8f42
commit 74c019f271
1 changed files with 10 additions and 9 deletions
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src/llvm_backend.cpp
+10 -9
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@@ -6367,32 +6367,33 @@ LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, BigInt const *
return LLVMConstNull(lb_type(m, original_type)); return LLVMConstNull(lb_type(m, original_type));
} }
u8 *rop = nullptr; size_t sz = cast(size_t)type_size_of(original_type);
u8 rop[64] = {};
size_t max_count = 0; size_t max_count = 0;
size_t written = 0; size_t written = 0;
size_t size = 1; size_t size = 1;
size_t nails = 0; size_t nails = 0;
mp_endian endian = MP_NATIVE_ENDIAN; mp_endian endian = MP_LITTLE_ENDIAN;
max_count = mp_pack_count(a, nails, size); max_count = mp_pack_count(a, nails, size);
rop = cast(u8 *)gb_alloc_align(permanent_allocator(), max_count, gb_align_of(u64)); GB_ASSERT(max_count <= sz);
mp_err err = mp_pack(rop, max_count, &written,
mp_err err = mp_pack(rop, sz, &written,
MP_LSB_FIRST, MP_LSB_FIRST,
size, endian, nails, size, endian, nails,
a); a);
GB_ASSERT(err == MP_OKAY); GB_ASSERT(err == MP_OKAY);
i64 sz = type_size_of(original_type); if (!is_type_endian_little(original_type)) {
if (is_type_different_to_arch_endianness(original_type)) { GB_ASSERT_MSG(sz >= max_count, "max_count: %tu, sz: %tu, written: %tu", max_count, sz, written);
GB_ASSERT_MSG(sz == cast(i64)written, "max_count: %tu, sz: %lld, written: %tu", max_count, sz, written); for (size_t i = 0; i < sz/2; i++) {
for (i64 i = 0; i < sz/2; i++) {
u8 tmp = rop[i]; u8 tmp = rop[i];
rop[i] = rop[sz-1-i]; rop[i] = rop[sz-1-i];
rop[sz-1-i] = tmp; rop[sz-1-i] = tmp;
} }
} }
LLVMValueRef value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), cast(unsigned)((written+7)/8), cast(u64 *)rop); LLVMValueRef value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), cast(unsigned)(sz+7/8), cast(u64 *)rop);
if (big_int_is_neg(a)) { if (big_int_is_neg(a)) {
value = LLVMConstNeg(value); value = LLVMConstNeg(value);
} }