| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * Copyright (c) 2021 Loongson Technology Corporation Limited |
| 4 | */ |
| 5 | |
| 6 | /* bit0(signaling/quiet) bit1(lt) bit2(eq) bit3(un) bit4(neq) */ |
| 7 | static uint32_t get_fcmp_flags(DisasContext *ctx, int cond) |
| 8 | { |
| 9 | uint32_t flags = 0; |
| 10 | |
| 11 | /*check cond , cond =[0-8,10,12] */ |
| 12 | if ((cond > 8) &&(cond != 10) && (cond != 12)) { |
| 13 | return -1; |
| 14 | } |
| 15 | |
| 16 | if (cond & 0x1) { |
| 17 | flags |= FCMP_LT; |
| 18 | } |
| 19 | if (cond & 0x2) { |
| 20 | flags |= FCMP_EQ; |
| 21 | } |
| 22 | if (cond & 0x4) { |
| 23 | flags |= FCMP_UN; |
| 24 | } |
| 25 | if (cond & 0x8) { |
| 26 | flags |= FCMP_GT | FCMP_LT; |
| 27 | } |
| 28 | return flags; |
| 29 | } |
| 30 | |
| 31 | static bool trans_fcmp_cond_s(DisasContext *ctx, arg_fcmp_cond_s *a) |
| 32 | { |
| 33 | TCGv var, src1, src2; |
| 34 | uint32_t flags = get_fcmp_flags(ctx, a->fcond >>1); |
| 35 | void (*fn)(TCGv, TCGv_env, TCGv, TCGv, TCGv_i32); |
| 36 | |
| 37 | if (flags == -1) { |
| 38 | generate_exception(ctx, EXCCODE_INE); |
| 39 | return true; |
| 40 | } |
| 41 | |
| 42 | if (!avail_FP_SP(ctx)) { |
| 43 | return false; |
| 44 | } |
| 45 | |
| 46 | CHECK_FPE; |
| 47 | |
| 48 | var = tcg_temp_new(); |
| 49 | src1 = get_fpr(ctx, a->fj); |
| 50 | src2 = get_fpr(ctx, a->fk); |
| 51 | fn = (a->fcond & 1 ? gen_helper_fcmp_s_s : gen_helper_fcmp_c_s); |
| 52 | fn(var, tcg_env, src1, src2, tcg_constant_i32(flags)); |
| 53 | |
| 54 | tcg_gen_st8_tl(var, tcg_env, offsetof(CPULoongArchState, cf[a->cd])); |
| 55 | return true; |
| 56 | } |
| 57 | |
| 58 | static bool trans_fcmp_cond_d(DisasContext *ctx, arg_fcmp_cond_d *a) |
| 59 | { |
| 60 | TCGv var, src1, src2; |
| 61 | uint32_t flags = get_fcmp_flags(ctx, a->fcond >> 1); |
| 62 | void (*fn)(TCGv, TCGv_env, TCGv, TCGv, TCGv_i32); |
| 63 | |
| 64 | if (flags == -1) { |
| 65 | generate_exception(ctx, EXCCODE_INE); |
| 66 | return true; |
| 67 | } |
| 68 | |
| 69 | if (!avail_FP_DP(ctx)) { |
| 70 | return false; |
| 71 | } |
| 72 | |
| 73 | CHECK_FPE; |
| 74 | |
| 75 | var = tcg_temp_new(); |
| 76 | src1 = get_fpr(ctx, a->fj); |
| 77 | src2 = get_fpr(ctx, a->fk); |
| 78 | fn = (a->fcond & 1 ? gen_helper_fcmp_s_d : gen_helper_fcmp_c_d); |
| 79 | fn(var, tcg_env, src1, src2, tcg_constant_i32(flags)); |
| 80 | |
| 81 | tcg_gen_st8_tl(var, tcg_env, offsetof(CPULoongArchState, cf[a->cd])); |
| 82 | return true; |
| 83 | } |