File: arm-asm-variable.c

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (32 lines) | stat: -rw-r--r-- 874 bytes parent folder | download | duplicates (21) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
// REQUIRES: arm-registered-target
// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -w -o - %s | FileCheck %s

typedef long long int64_t;
typedef unsigned int uint32_t;

int64_t foo(int64_t v, volatile int64_t *p)
{
  register uint32_t rl asm("r1");
  register uint32_t rh asm("r2");

  int64_t r;
  uint32_t t;

  __asm__ __volatile__(							\
		       "ldrexd%[_rl], %[_rh], [%[_p]]"			\
		       : [_rl] "=&r" (rl), [_rh] "=&r" (rh)		\
		       : [_p] "p" (p) : "memory");

  // CHECK: call { i32, i32 } asm sideeffect "ldrexd$0, $1, [$2]", "=&{r1},=&{r2},r,~{memory}"(i64*

  return r;
}

// Make sure we translate register names properly.
void bar (void) {
  register unsigned int rn asm("r14");
  register unsigned int d asm("r2");

  // CHECK: call i32 asm sideeffect "sub $1, $1, #32", "={r2},{lr}"
  asm volatile ("sub %1, %1, #32" : "=r"(d) : "r"(rn));
}