OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [gcc.target/] [mips/] [ins-2.c] - Rev 691

Compare with Previous | Blame | View Log

/* { dg-do compile } */
/* { dg-options "-O -meb isa_rev>=2 -mgp64" } */
/* { dg-final { scan-assembler-times "\tins\t|\tdins\t" 1 } } */
/* { dg-final { scan-assembler-times "\tsll\t|\tins\t" 1 } } */
 
/* When inserting something into the top bit of a 32-bit structure,
   we must make sure that the register remains properly sign-extended.
   There are two ways of doing this:
 
     - use purely 32-bit bit manipulations (a single INS, matched twice here).
     - use a 64-bit bit manipulation (DINS), and sign-extend the result.  We
     check for this extension using SLL.  */
 
struct s
{
  int a:3;
  int b:29;
};
 
NOMIPS16 void
f (int a)
{
  struct s s;
  asm volatile ("" : "=r"(s));
  s.a = a;
  asm volatile ("" :: "r"(s));
}
 

Compare with Previous | Blame | View Log

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.