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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Support for Floating Point and Vector Instructions
*
*/
#ifndef __ASM_S390_FPU_INSN_H
#define __ASM_S390_FPU_INSN_H
#include <asm/fpu-insn-asm.h>
#ifndef __ASSEMBLY__
#include <asm/asm-extable.h>
asm(".include \"asm/fpu-insn-asm.h\"\n");
/**
* sfpc_safe - Set floating point control register safely.
* @fpc: new value for floating point control register
*
* Set floating point control register. This may lead to an exception,
* since a saved value may have been modified by user space (ptrace,
* signal return, kvm registers) to an invalid value. In such a case
* set the floating point control register to zero.
*/
static inline void sfpc_safe(u32 fpc)
{
asm volatile("\n"
"0: sfpc %[fpc]\n"
"1: nopr %%r7\n"
".pushsection .fixup, \"ax\"\n"
"2: lghi %[fpc],0\n"
" jg 0b\n"
".popsection\n"
EX_TABLE(1b, 2b)
: [fpc] "+d" (fpc)
: : "memory");
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_S390_FPU_INSN_H */
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