diff options
Diffstat (limited to 'target/unicore32/op_helper.c')
| -rw-r--r-- | target/unicore32/op_helper.c | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/target/unicore32/op_helper.c b/target/unicore32/op_helper.c deleted file mode 100644 index eeaa78601a..0000000000 --- a/target/unicore32/op_helper.c +++ /dev/null @@ -1,244 +0,0 @@ -/* - * UniCore32 helper routines - * - * Copyright (C) 2010-2012 Guan Xuetao - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation, or (at your option) any - * later version. See the COPYING file in the top-level directory. - */ -#include "qemu/osdep.h" -#include "cpu.h" -#include "exec/helper-proto.h" -#include "exec/exec-all.h" -#include "exec/cpu_ldst.h" - -#define SIGNBIT (uint32_t)0x80000000 -#define SIGNBIT64 ((uint64_t)1 << 63) - -void HELPER(exception)(CPUUniCore32State *env, uint32_t excp) -{ - CPUState *cs = env_cpu(env); - - cs->exception_index = excp; - cpu_loop_exit(cs); -} - -static target_ulong asr_read(CPUUniCore32State *env) -{ - int ZF; - ZF = (env->ZF == 0); - return env->uncached_asr | (env->NF & 0x80000000) | (ZF << 30) | - (env->CF << 29) | ((env->VF & 0x80000000) >> 3); -} - -target_ulong cpu_asr_read(CPUUniCore32State *env) -{ - return asr_read(env); -} - -target_ulong HELPER(asr_read)(CPUUniCore32State *env) -{ - return asr_read(env); -} - -static void asr_write(CPUUniCore32State *env, target_ulong val, - target_ulong mask) -{ - if (mask & ASR_NZCV) { - env->ZF = (~val) & ASR_Z; - env->NF = val; - env->CF = (val >> 29) & 1; - env->VF = (val << 3) & 0x80000000; - } - - if ((env->uncached_asr ^ val) & mask & ASR_M) { - switch_mode(env, val & ASR_M); - } - mask &= ~ASR_NZCV; - env->uncached_asr = (env->uncached_asr & ~mask) | (val & mask); -} - -void cpu_asr_write(CPUUniCore32State *env, target_ulong val, target_ulong mask) -{ - asr_write(env, val, mask); -} - -void HELPER(asr_write)(CPUUniCore32State *env, target_ulong val, - target_ulong mask) -{ - asr_write(env, val, mask); -} - -/* Access to user mode registers from privileged modes. */ -uint32_t HELPER(get_user_reg)(CPUUniCore32State *env, uint32_t regno) -{ - uint32_t val; - - if (regno == 29) { - val = env->banked_r29[0]; - } else if (regno == 30) { - val = env->banked_r30[0]; - } else { - val = env->regs[regno]; - } - return val; -} - -void HELPER(set_user_reg)(CPUUniCore32State *env, uint32_t regno, uint32_t val) -{ - if (regno == 29) { - env->banked_r29[0] = val; - } else if (regno == 30) { - env->banked_r30[0] = val; - } else { - env->regs[regno] = val; - } -} - -/* ??? Flag setting arithmetic is awkward because we need to do comparisons. - The only way to do that in TCG is a conditional branch, which clobbers - all our temporaries. For now implement these as helper functions. */ - -uint32_t HELPER(add_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b) -{ - uint32_t result; - result = a + b; - env->NF = env->ZF = result; - env->CF = result < a; - env->VF = (a ^ b ^ -1) & (a ^ result); - return result; -} - -uint32_t HELPER(adc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b) -{ - uint32_t result; - if (!env->CF) { - result = a + b; - env->CF = result < a; - } else { - result = a + b + 1; - env->CF = result <= a; - } - env->VF = (a ^ b ^ -1) & (a ^ result); - env->NF = env->ZF = result; - return result; -} - -uint32_t HELPER(sub_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b) -{ - uint32_t result; - result = a - b; - env->NF = env->ZF = result; - env->CF = a >= b; - env->VF = (a ^ b) & (a ^ result); - return result; -} - -uint32_t HELPER(sbc_cc)(CPUUniCore32State *env, uint32_t a, uint32_t b) -{ - uint32_t result; - if (!env->CF) { - result = a - b - 1; - env->CF = a > b; - } else { - result = a - b; - env->CF = a >= b; - } - env->VF = (a ^ b) & (a ^ result); - env->NF = env->ZF = result; - return result; -} - -/* Similarly for variable shift instructions. */ - -uint32_t HELPER(shl)(uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - return 0; - } - return x << shift; -} - -uint32_t HELPER(shr)(uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - return 0; - } - return (uint32_t)x >> shift; -} - -uint32_t HELPER(sar)(uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - shift = 31; - } - return (int32_t)x >> shift; -} - -uint32_t HELPER(shl_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - if (shift == 32) { - env->CF = x & 1; - } else { - env->CF = 0; - } - return 0; - } else if (shift != 0) { - env->CF = (x >> (32 - shift)) & 1; - return x << shift; - } - return x; -} - -uint32_t HELPER(shr_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - if (shift == 32) { - env->CF = (x >> 31) & 1; - } else { - env->CF = 0; - } - return 0; - } else if (shift != 0) { - env->CF = (x >> (shift - 1)) & 1; - return x >> shift; - } - return x; -} - -uint32_t HELPER(sar_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i) -{ - int shift = i & 0xff; - if (shift >= 32) { - env->CF = (x >> 31) & 1; - return (int32_t)x >> 31; - } else if (shift != 0) { - env->CF = (x >> (shift - 1)) & 1; - return (int32_t)x >> shift; - } - return x; -} - -uint32_t HELPER(ror_cc)(CPUUniCore32State *env, uint32_t x, uint32_t i) -{ - int shift1, shift; - shift1 = i & 0xff; - shift = shift1 & 0x1f; - if (shift == 0) { - if (shift1 != 0) { - env->CF = (x >> 31) & 1; - } - return x; - } else { - env->CF = (x >> (shift - 1)) & 1; - return ((uint32_t)x >> shift) | (x << (32 - shift)); - } -} |