1 /* 2 * Copyright (c) 2011 - 2019, Max Filippov, Open Source and Linux Lab. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of the Open Source and Linux Lab nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "qemu/osdep.h" 29 #include "qemu/main-loop.h" 30 #include "cpu.h" 31 #include "exec/helper-proto.h" 32 #include "qemu/host-utils.h" 33 #include "exec/exec-all.h" 34 #include "fpu/softfloat.h" 35 36 void HELPER(wur_fcr)(CPUXtensaState *env, uint32_t v) 37 { 38 static const int rounding_mode[] = { 39 float_round_nearest_even, 40 float_round_to_zero, 41 float_round_up, 42 float_round_down, 43 }; 44 45 env->uregs[FCR] = v & 0xfffff07f; 46 set_float_rounding_mode(rounding_mode[v & 3], &env->fp_status); 47 } 48 49 float32 HELPER(abs_s)(float32 v) 50 { 51 return float32_abs(v); 52 } 53 54 float32 HELPER(neg_s)(float32 v) 55 { 56 return float32_chs(v); 57 } 58 59 float32 HELPER(add_s)(CPUXtensaState *env, float32 a, float32 b) 60 { 61 return float32_add(a, b, &env->fp_status); 62 } 63 64 float32 HELPER(sub_s)(CPUXtensaState *env, float32 a, float32 b) 65 { 66 return float32_sub(a, b, &env->fp_status); 67 } 68 69 float32 HELPER(mul_s)(CPUXtensaState *env, float32 a, float32 b) 70 { 71 return float32_mul(a, b, &env->fp_status); 72 } 73 74 float32 HELPER(madd_s)(CPUXtensaState *env, float32 a, float32 b, float32 c) 75 { 76 return float32_muladd(b, c, a, 0, &env->fp_status); 77 } 78 79 float32 HELPER(msub_s)(CPUXtensaState *env, float32 a, float32 b, float32 c) 80 { 81 return float32_muladd(b, c, a, float_muladd_negate_product, 82 &env->fp_status); 83 } 84 85 uint32_t HELPER(ftoi)(float32 v, uint32_t rounding_mode, uint32_t scale) 86 { 87 float_status fp_status = {0}; 88 89 set_float_rounding_mode(rounding_mode, &fp_status); 90 return float32_to_int32(float32_scalbn(v, scale, &fp_status), &fp_status); 91 } 92 93 uint32_t HELPER(ftoui)(float32 v, uint32_t rounding_mode, uint32_t scale) 94 { 95 float_status fp_status = {0}; 96 float32 res; 97 98 set_float_rounding_mode(rounding_mode, &fp_status); 99 100 res = float32_scalbn(v, scale, &fp_status); 101 102 if (float32_is_neg(v) && !float32_is_any_nan(v)) { 103 return float32_to_int32(res, &fp_status); 104 } else { 105 return float32_to_uint32(res, &fp_status); 106 } 107 } 108 109 float32 HELPER(itof)(CPUXtensaState *env, uint32_t v, uint32_t scale) 110 { 111 return float32_scalbn(int32_to_float32(v, &env->fp_status), 112 (int32_t)scale, &env->fp_status); 113 } 114 115 float32 HELPER(uitof)(CPUXtensaState *env, uint32_t v, uint32_t scale) 116 { 117 return float32_scalbn(uint32_to_float32(v, &env->fp_status), 118 (int32_t)scale, &env->fp_status); 119 } 120 121 static inline void set_br(CPUXtensaState *env, bool v, uint32_t br) 122 { 123 if (v) { 124 env->sregs[BR] |= br; 125 } else { 126 env->sregs[BR] &= ~br; 127 } 128 } 129 130 void HELPER(un_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 131 { 132 set_br(env, float32_unordered_quiet(a, b, &env->fp_status), br); 133 } 134 135 void HELPER(oeq_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 136 { 137 set_br(env, float32_eq_quiet(a, b, &env->fp_status), br); 138 } 139 140 void HELPER(ueq_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 141 { 142 int v = float32_compare_quiet(a, b, &env->fp_status); 143 set_br(env, v == float_relation_equal || v == float_relation_unordered, br); 144 } 145 146 void HELPER(olt_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 147 { 148 set_br(env, float32_lt_quiet(a, b, &env->fp_status), br); 149 } 150 151 void HELPER(ult_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 152 { 153 int v = float32_compare_quiet(a, b, &env->fp_status); 154 set_br(env, v == float_relation_less || v == float_relation_unordered, br); 155 } 156 157 void HELPER(ole_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 158 { 159 set_br(env, float32_le_quiet(a, b, &env->fp_status), br); 160 } 161 162 void HELPER(ule_s)(CPUXtensaState *env, uint32_t br, float32 a, float32 b) 163 { 164 int v = float32_compare_quiet(a, b, &env->fp_status); 165 set_br(env, v != float_relation_greater, br); 166 } 167