mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
3639ce2575
Hopefully this resolves any outstanding style issues and gives us an automated way of ensuring we conform to the style guidelines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178415 91177308-0d34-0410-b5e6-96231b3b80d8
91 lines
1.9 KiB
C++
91 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);
|
|
|
|
(void) retval;
|
|
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
|