diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/stage1/codegen.cpp | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/stage1/codegen.cpp b/src/stage1/codegen.cpp index 10943483f4..7a973285df 100644 --- a/src/stage1/codegen.cpp +++ b/src/stage1/codegen.cpp @@ -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: |