Changeset cc74cb5 in mainline for kernel/arch/ia64/include/arch/context.h

Timestamp:

2018-09-14T23:15:04Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

6f58770

Parents:

09ab0a9a

Message:

Set FPSR.sf1 controls to standard values

The Itanium Software Conventions and Runtime Architecture Guide reserves
the Status Field 1 of FPSR to be used by the divide and square root code
and requires that it has certain standard values.

File:

• kernel/arch/ia64/include/arch/context.h (modified) (1 diff)

kernel/arch/ia64/include/arch/context.h

@@ -57 +57 @@
                 (c)->bsp = ((uintptr_t) stack) + ALIGN_UP((size / 2), REGISTER_STACK_ALIGNMENT); \
                 (c)->ar_pfs &= PFM_MASK; \
-                (c)->ar_fpsr = FPSR_TRAPS_ALL; \
+                (c)->ar_fpsr = FPSR_TRAPS_ALL | FPSR_SF1_CTRL; \
                 (c)->sp = ((uintptr_t) stack) + ALIGN_UP((size / 2), STACK_ALIGNMENT) - SP_DELTA; \
                 (c)->r1 = (uintptr_t) &__gp; \