// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <dwarf-regs.h>
#include "../../../arch/s390/include/uapi/asm/perf_regs.h"

int __get_dwarf_regnum_for_perf_regnum_s390(int perf_regnum)
{
        static const int dwarf_s390_regnums[] = {
                [PERF_REG_S390_R0] = 0,
                [PERF_REG_S390_R1] = 1,
                [PERF_REG_S390_R2] = 2,
                [PERF_REG_S390_R3] = 3,
                [PERF_REG_S390_R4] = 4,
                [PERF_REG_S390_R5] = 5,
                [PERF_REG_S390_R6] = 6,
                [PERF_REG_S390_R7] = 7,
                [PERF_REG_S390_R8] = 8,
                [PERF_REG_S390_R9] = 9,
                [PERF_REG_S390_R10] = 10,
                [PERF_REG_S390_R11] = 11,
                [PERF_REG_S390_R12] = 12,
                [PERF_REG_S390_R13] = 13,
                [PERF_REG_S390_R14] = 14,
                [PERF_REG_S390_R15] = 15,
                [PERF_REG_S390_FP0] = 16,
                [PERF_REG_S390_FP1] = 20,
                [PERF_REG_S390_FP2] = 17,
                [PERF_REG_S390_FP3] = 21,
                [PERF_REG_S390_FP4] = 18,
                [PERF_REG_S390_FP5] = 22,
                [PERF_REG_S390_FP6] = 19,
                [PERF_REG_S390_FP7] = 23,
                [PERF_REG_S390_FP8] = 24,
                [PERF_REG_S390_FP9] = 28,
                [PERF_REG_S390_FP10] = 25,
                [PERF_REG_S390_FP11] = 29,
                [PERF_REG_S390_FP12] = 26,
                [PERF_REG_S390_FP13] = 30,
                [PERF_REG_S390_FP14] = 27,
                [PERF_REG_S390_FP15] = 31,
                [PERF_REG_S390_MASK] = 64,
                [PERF_REG_S390_PC] = 65,
        };

        if (perf_regnum == 0)
                return 0;

        if (perf_regnum <  0 || perf_regnum > (int)ARRAY_SIZE(dwarf_s390_regnums) ||
            dwarf_s390_regnums[perf_regnum] == 0)
                return -ENOENT;

        return dwarf_s390_regnums[perf_regnum];
}