Mercurial > projects > ldc

comparison gen/tollvm.cpp @ 1138:4c8bb03e4fbc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update DtoConstFP() to be correct after LLVM r67562, which changed the way the APFloat constructor expects its i80 APInts to be formatted. (They're now actually consistent with the x87 format)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 24 Mar 2009 15:24:59 +0100
parents f0b6549055ab
children 71479f6e2a01
comparison
equal deleted inserted replaced
1137:45d73f0a9b43 1138:4c8bb03e4fbc
18 #include "gen/classes.h" 18 #include "gen/classes.h"
19 #include "gen/typeinf.h" 19 #include "gen/typeinf.h"
20 #include "gen/complex.h" 20 #include "gen/complex.h"
21 #include "gen/llvmhelpers.h" 21 #include "gen/llvmhelpers.h"
22 #include "gen/linkage.h" 22 #include "gen/linkage.h"
23 #include "gen/llvm-version.h"
23 24
24 bool DtoIsPassedByRef(Type* type) 25 bool DtoIsPassedByRef(Type* type)
25 { 26 {
26 Type* typ = type->toBasetype(); 27 Type* typ = type->toBasetype();
27 TY t = typ->ty; 28 TY t = typ->ty;
519 520
520 if(llty == LLType::FloatTy || llty == LLType::DoubleTy) 521 if(llty == LLType::FloatTy || llty == LLType::DoubleTy)
521 return LLConstantFP::get(llty, value); 522 return LLConstantFP::get(llty, value);
522 else if(llty == LLType::X86_FP80Ty) { 523 else if(llty == LLType::X86_FP80Ty) {
523 uint64_t bits[] = {0, 0}; 524 uint64_t bits[] = {0, 0};
525 #if LLVM_REV < 67562
526 // Prior to r67562, the i80 APInt format expected by the APFloat
527 // constructor was different than the memory layout on the actual
528 // processor.
524 bits[1] = *(uint16_t*)&value; 529 bits[1] = *(uint16_t*)&value;
525 bits[0] = *(uint64_t*)((uint16_t*)&value + 1); 530 bits[0] = *(uint64_t*)((uint16_t*)&value + 1);
531 #else
532 bits[0] = *(uint64_t*)&value;
533 bits[1] = *(uint16_t*)((uint64_t*)&value + 1);
534 #endif
526 return LLConstantFP::get(APFloat(APInt(80, 2, bits))); 535 return LLConstantFP::get(APFloat(APInt(80, 2, bits)));
527 } else { 536 } else {
528 assert(0 && "Unknown floating point type encountered"); 537 assert(0 && "Unknown floating point type encountered");
529 } 538 }
530 } 539 }