mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-31 12:30:06 +00:00
49683f3c96
The new target machines are: nvptx (old ptx32) => 32-bit PTX nvptx64 (old ptx64) => 64-bit PTX The sources are based on the internal NVIDIA NVPTX back-end, and contain more functionality than the current PTX back-end currently provides. NV_CONTRIB git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156196 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
//===-- NVPTXutil.cpp - Functions exported to CodeGen --*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the functions that can be used in CodeGen.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "NVPTXutil.h"
|
|
#include "NVPTX.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
|
|
bool isParamLoad(const MachineInstr *MI)
|
|
{
|
|
if ((MI->getOpcode() != NVPTX::LD_i32_avar) &&
|
|
(MI->getOpcode() != NVPTX::LD_i64_avar))
|
|
return false;
|
|
if (MI->getOperand(2).isImm() == false)
|
|
return false;
|
|
if (MI->getOperand(2).getImm() != NVPTX::PTXLdStInstCode::PARAM)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
#define DATA_MASK 0x7f
|
|
#define DIGIT_WIDTH 7
|
|
#define MORE_BYTES 0x80
|
|
|
|
static int encode_leb128(uint64_t val, int *nbytes,
|
|
char *space, int splen)
|
|
{
|
|
char *a;
|
|
char *end = space + splen;
|
|
|
|
a = space;
|
|
do {
|
|
unsigned char uc;
|
|
|
|
if (a >= end)
|
|
return 1;
|
|
uc = val & DATA_MASK;
|
|
val >>= DIGIT_WIDTH;
|
|
if (val != 0)
|
|
uc |= MORE_BYTES;
|
|
*a = uc;
|
|
a++;
|
|
} while (val);
|
|
*nbytes = a - space;
|
|
return 0;
|
|
}
|
|
|
|
#undef DATA_MASK
|
|
#undef DIGIT_WIDTH
|
|
#undef MORE_BYTES
|
|
|
|
uint64_t encode_leb128(const char *str)
|
|
{
|
|
union { uint64_t x; char a[8]; } temp64;
|
|
|
|
temp64.x = 0;
|
|
|
|
for (unsigned i=0,e=strlen(str); i!=e; ++i)
|
|
temp64.a[i] = str[e-1-i];
|
|
|
|
char encoded[16];
|
|
int nbytes;
|
|
|
|
int retval = encode_leb128(temp64.x, &nbytes, encoded, 16);
|
|
|
|
assert(retval == 0 &&
|
|
"Encoding to leb128 failed");
|
|
|
|
assert(nbytes <= 8 &&
|
|
"Cannot support register names with leb128 encoding > 8 bytes");
|
|
|
|
temp64.x = 0;
|
|
for (int i=0; i<nbytes; ++i)
|
|
temp64.a[i] = encoded[i];
|
|
|
|
return temp64.x;
|
|
}
|
|
|
|
} // end namespace llvm
|