2005-08-04 07:12:09 +00:00
|
|
|
//===-- X86Subtarget.cpp - X86 Subtarget Information ------------*- C++ -*-===//
|
2005-07-12 01:41:54 +00:00
|
|
|
//
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
//
|
|
|
|
// This file was developed by Nate Begeman and is distributed under the
|
|
|
|
// University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//
|
|
|
|
// This file implements the X86 specific subclass of TargetSubtarget.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#include "X86Subtarget.h"
|
|
|
|
#include "llvm/Module.h"
|
2006-01-26 09:53:06 +00:00
|
|
|
#include "X86GenSubtarget.inc"
|
2005-07-12 01:41:54 +00:00
|
|
|
using namespace llvm;
|
|
|
|
|
2006-01-27 21:49:34 +00:00
|
|
|
// FIXME: temporary.
|
|
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
namespace {
|
|
|
|
cl::opt<bool> EnableSSE("enable-x86-sse", cl::Hidden,
|
|
|
|
cl::desc("Enable sse on X86"));
|
|
|
|
}
|
|
|
|
|
2006-01-28 06:05:41 +00:00
|
|
|
/// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
|
|
|
|
/// specified arguments. If we can't run cpuid on the host, return true.
|
2006-01-28 18:09:06 +00:00
|
|
|
static bool GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
|
|
|
|
unsigned *rECX, unsigned *rEDX) {
|
2006-01-27 08:10:46 +00:00
|
|
|
#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
|
|
|
|
#if defined(__GNUC__)
|
|
|
|
asm ("pushl\t%%ebx\n\t"
|
|
|
|
"cpuid\n\t"
|
2006-01-27 19:30:30 +00:00
|
|
|
"movl\t%%ebx, %%esi\n\t"
|
2006-01-27 08:10:46 +00:00
|
|
|
"popl\t%%ebx"
|
2006-01-28 18:09:06 +00:00
|
|
|
: "=a" (*rEAX),
|
|
|
|
"=S" (*rEBX),
|
|
|
|
"=c" (*rECX),
|
|
|
|
"=d" (*rEDX)
|
2006-01-27 08:10:46 +00:00
|
|
|
: "a" (value));
|
2006-01-28 06:05:41 +00:00
|
|
|
return false;
|
2006-01-28 18:09:06 +00:00
|
|
|
#elif defined(_MSC_VER)
|
|
|
|
__asm {
|
|
|
|
mov eax,value
|
|
|
|
cpuid
|
|
|
|
mov esi,rEAX
|
|
|
|
mov dword ptr [esi],eax
|
|
|
|
mov esi,rEBX
|
|
|
|
mov dword ptr [esi],ebx
|
|
|
|
mov esi,rECX
|
|
|
|
mov dword ptr [esi],ecx
|
|
|
|
mov esi,rEDX
|
|
|
|
mov dword ptr [esi],edx
|
|
|
|
}
|
|
|
|
return false;
|
2006-01-27 08:10:46 +00:00
|
|
|
#endif
|
|
|
|
#endif
|
2006-01-28 06:05:41 +00:00
|
|
|
return true;
|
2006-01-27 08:10:46 +00:00
|
|
|
}
|
2006-01-26 09:53:06 +00:00
|
|
|
|
|
|
|
static const char *GetCurrentX86CPU() {
|
2006-01-27 19:30:30 +00:00
|
|
|
unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
|
2006-01-28 06:05:41 +00:00
|
|
|
if (GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX))
|
|
|
|
return "generic";
|
2006-01-27 08:10:46 +00:00
|
|
|
unsigned Family = (EAX & (0xffffffff >> (32 - 4)) << 8) >> 8; // Bits 8 - 11
|
|
|
|
unsigned Model = (EAX & (0xffffffff >> (32 - 4)) << 4) >> 4; // Bits 4 - 7
|
2006-01-27 19:30:30 +00:00
|
|
|
GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
|
2006-01-27 08:10:46 +00:00
|
|
|
bool Em64T = EDX & (1 << 29);
|
2006-01-26 09:53:06 +00:00
|
|
|
|
2006-01-28 18:09:06 +00:00
|
|
|
unsigned text[12];
|
|
|
|
GetCpuIDAndInfo(0x80000002, text+0, text+1, text+2, text+3);
|
|
|
|
GetCpuIDAndInfo(0x80000003, text+4, text+5, text+6, text+7);
|
|
|
|
GetCpuIDAndInfo(0x80000004, text+8, text+9, text+10, text+11);
|
|
|
|
char *t = reinterpret_cast<char *>(&text[0]);
|
|
|
|
|
|
|
|
if (memcmp(t, "Intel", 5) == 0) {
|
|
|
|
switch (Family) {
|
2006-01-27 08:10:46 +00:00
|
|
|
case 3:
|
2006-01-28 18:09:06 +00:00
|
|
|
return "i386";
|
2006-01-27 08:10:46 +00:00
|
|
|
case 4:
|
2006-01-28 18:09:06 +00:00
|
|
|
return "i486";
|
|
|
|
case 5:
|
|
|
|
switch (Model) {
|
|
|
|
case 4: return "pentium-mmx";
|
|
|
|
default: return "pentium";
|
|
|
|
}
|
|
|
|
case 6:
|
|
|
|
switch (Model) {
|
|
|
|
case 1: return "pentiumpro";
|
|
|
|
case 3:
|
|
|
|
case 5:
|
|
|
|
case 6: return "pentium2";
|
|
|
|
case 7:
|
|
|
|
case 8:
|
|
|
|
case 10:
|
|
|
|
case 11: return "pentium3";
|
|
|
|
case 9:
|
|
|
|
case 13: return "pentium-m";
|
|
|
|
case 14: return "yonah";
|
|
|
|
default: return "i686";
|
|
|
|
}
|
|
|
|
case 15: {
|
|
|
|
switch (Model) {
|
|
|
|
case 3:
|
|
|
|
case 4:
|
|
|
|
return (Em64T) ? "nocona" : "prescott";
|
|
|
|
default:
|
|
|
|
return (Em64T) ? "x86-64" : "pentium4";
|
|
|
|
}
|
2006-01-27 08:10:46 +00:00
|
|
|
}
|
2006-01-28 18:09:06 +00:00
|
|
|
|
|
|
|
default:
|
|
|
|
return "generic";
|
2006-01-27 08:10:46 +00:00
|
|
|
}
|
2006-01-28 18:09:06 +00:00
|
|
|
} else if (memcmp(t, "AMD", 3) == 0) {
|
|
|
|
// FIXME: fill in remaining family/model combinations
|
|
|
|
switch (Family) {
|
|
|
|
case 15:
|
|
|
|
return (Em64T) ? "athlon64" : "athlon";
|
|
|
|
|
|
|
|
default:
|
|
|
|
return "generic";
|
|
|
|
}
|
|
|
|
} else {
|
2006-01-27 08:10:46 +00:00
|
|
|
return "generic";
|
2006-01-26 09:53:06 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-01-27 22:37:09 +00:00
|
|
|
X86Subtarget::X86Subtarget(const Module &M, const std::string &FS) {
|
|
|
|
stackAlignment = 8;
|
|
|
|
indirectExternAndWeakGlobals = false;
|
|
|
|
X86SSELevel = NoMMXSSE;
|
|
|
|
X863DNowLevel = NoThreeDNow;
|
|
|
|
Is64Bit = false;
|
|
|
|
|
2006-01-26 09:53:06 +00:00
|
|
|
// Determine default and user specified characteristics
|
2006-01-27 08:10:46 +00:00
|
|
|
std::string CPU = GetCurrentX86CPU();
|
2006-01-26 09:53:06 +00:00
|
|
|
|
|
|
|
// Parse features string.
|
|
|
|
ParseSubtargetFeatures(FS, CPU);
|
|
|
|
|
2005-11-21 22:31:58 +00:00
|
|
|
// Default to ELF unless otherwise specified.
|
|
|
|
TargetType = isELF;
|
2006-01-27 18:30:50 +00:00
|
|
|
|
|
|
|
// FIXME: Force these off until they work. An llc-beta option should turn
|
|
|
|
// them back on.
|
2006-01-27 21:49:34 +00:00
|
|
|
if (!EnableSSE) {
|
|
|
|
X86SSELevel = NoMMXSSE;
|
|
|
|
X863DNowLevel = NoThreeDNow;
|
|
|
|
}
|
2005-11-21 22:31:58 +00:00
|
|
|
|
2005-07-12 01:41:54 +00:00
|
|
|
// Set the boolean corresponding to the current target triple, or the default
|
|
|
|
// if one cannot be determined, to true.
|
|
|
|
const std::string& TT = M.getTargetTriple();
|
|
|
|
if (TT.length() > 5) {
|
2005-11-21 22:31:58 +00:00
|
|
|
if (TT.find("cygwin") != std::string::npos ||
|
|
|
|
TT.find("mingw") != std::string::npos)
|
|
|
|
TargetType = isCygwin;
|
|
|
|
else if (TT.find("darwin") != std::string::npos)
|
|
|
|
TargetType = isDarwin;
|
|
|
|
else if (TT.find("win32") != std::string::npos)
|
|
|
|
TargetType = isWindows;
|
2005-07-12 01:41:54 +00:00
|
|
|
} else if (TT.empty()) {
|
|
|
|
#if defined(__CYGWIN__) || defined(__MINGW32__)
|
2005-11-21 22:31:58 +00:00
|
|
|
TargetType = isCygwin;
|
2005-07-12 01:41:54 +00:00
|
|
|
#elif defined(__APPLE__)
|
2005-11-21 22:31:58 +00:00
|
|
|
TargetType = isDarwin;
|
2005-07-12 01:41:54 +00:00
|
|
|
#elif defined(_WIN32)
|
2005-11-21 22:31:58 +00:00
|
|
|
TargetType = isWindows;
|
2005-07-12 01:41:54 +00:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2005-11-21 22:43:58 +00:00
|
|
|
if (TargetType == isDarwin) {
|
2005-07-12 01:41:54 +00:00
|
|
|
stackAlignment = 16;
|
|
|
|
indirectExternAndWeakGlobals = true;
|
|
|
|
}
|
|
|
|
}
|