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Fix f128 codegen on BE hosts

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This commit is contained in:
Koakuma 2020-12-30 18:08:45 +07:00
parent bbb58b10f6
commit b531caac02
1 changed files with 15 additions and 5 deletions
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20
src/stage1/codegen.cpp
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@ -19,6 +19,7 @@
#include "stage2.h"
#include "dump_analysis.hpp"
#include "softfloat.hpp"
#include "zigendian.h"
#include <stdio.h>
#include <errno.h>
@ -7421,11 +7422,20 @@ static LLVMValueRef gen_const_val(CodeGen *g, ZigValue *const_val, const char *n
return LLVMConstReal(get_llvm_type(g, type_entry), const_val->data.x_f64);
case 128:
{
// TODO make sure this is correct on big endian targets too
uint8_t buf[16];
memcpy(buf, &const_val->data.x_f128, 16);
LLVMValueRef as_int = LLVMConstIntOfArbitraryPrecision(LLVMInt128Type(), 2,
(uint64_t*)buf);
uint64_t buf[2];
// LLVM seems to require that the lower half of the f128 be placed first in the buffer.
#if defined(ZIG_BYTE_ORDER) && ZIG_BYTE_ORDER == ZIG_LITTLE_ENDIAN
buf[0] = const_val->data.x_f128.v[0];
buf[1] = const_val->data.x_f128.v[1];
#elif defined(ZIG_BYTE_ORDER) && ZIG_BYTE_ORDER == ZIG_BIG_ENDIAN
buf[0] = const_val->data.x_f128.v[1];
buf[1] = const_val->data.x_f128.v[0];
#else
#error Unsupported endian
#endif
LLVMValueRef as_int = LLVMConstIntOfArbitraryPrecision(LLVMInt128Type(), 2, buf);
return LLVMConstBitCast(as_int, get_llvm_type(g, type_entry));
}
default: