diff options
Diffstat (limited to 'target/arm/translate.c')
-rw-r--r-- | target/arm/translate.c | 97 |
1 files changed, 3 insertions, 94 deletions
diff --git a/target/arm/translate.c b/target/arm/translate.c index 499ce7d..58c0eb1 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -3092,9 +3092,8 @@ static void gen_neon_dup_high16(TCGv_i32 var) */ static int disas_vfp_insn(DisasContext *s, uint32_t insn) { - uint32_t rd, rn, rm, op, i, n, offset, delta_d, delta_m, bank_mask; + uint32_t rd, rn, rm, op, i, n, delta_d, delta_m, bank_mask; int dp, veclen; - TCGv_i32 addr; TCGv_i32 tmp; TCGv_i32 tmp2; @@ -3702,98 +3701,8 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn) break; case 0xc: case 0xd: - if ((insn & 0x03e00000) == 0x00400000) { - /* Already handled by decodetree */ - return 1; - } else { - /* Load/store */ - rn = (insn >> 16) & 0xf; - if (dp) - VFP_DREG_D(rd, insn); - else - rd = VFP_SREG_D(insn); - if ((insn & 0x01200000) == 0x01000000) { - /* Already handled by decodetree */ - return 1; - } else { - /* load/store multiple */ - int w = insn & (1 << 21); - if (dp) - n = (insn >> 1) & 0x7f; - else - n = insn & 0xff; - - if (w && !(((insn >> 23) ^ (insn >> 24)) & 1)) { - /* P == U , W == 1 => UNDEF */ - return 1; - } - if (n == 0 || (rd + n) > 32 || (dp && n > 16)) { - /* UNPREDICTABLE cases for bad immediates: we choose to - * UNDEF to avoid generating huge numbers of TCG ops - */ - return 1; - } - if (rn == 15 && w) { - /* writeback to PC is UNPREDICTABLE, we choose to UNDEF */ - return 1; - } - - if (s->thumb && rn == 15) { - /* This is actually UNPREDICTABLE */ - addr = tcg_temp_new_i32(); - tcg_gen_movi_i32(addr, s->pc & ~2); - } else { - addr = load_reg(s, rn); - } - if (insn & (1 << 24)) /* pre-decrement */ - tcg_gen_addi_i32(addr, addr, -((insn & 0xff) << 2)); - - if (s->v8m_stackcheck && rn == 13 && w) { - /* - * Here 'addr' is the lowest address we will store to, - * and is either the old SP (if post-increment) or - * the new SP (if pre-decrement). For post-increment - * where the old value is below the limit and the new - * value is above, it is UNKNOWN whether the limit check - * triggers; we choose to trigger. - */ - gen_helper_v8m_stackcheck(cpu_env, addr); - } - - if (dp) - offset = 8; - else - offset = 4; - for (i = 0; i < n; i++) { - if (insn & ARM_CP_RW_BIT) { - /* load */ - gen_vfp_ld(s, dp, addr); - gen_mov_vreg_F0(dp, rd + i); - } else { - /* store */ - gen_mov_F0_vreg(dp, rd + i); - gen_vfp_st(s, dp, addr); - } - tcg_gen_addi_i32(addr, addr, offset); - } - if (w) { - /* writeback */ - if (insn & (1 << 24)) - offset = -offset * n; - else if (dp && (insn & 1)) - offset = 4; - else - offset = 0; - - if (offset != 0) - tcg_gen_addi_i32(addr, addr, offset); - store_reg(s, rn, addr); - } else { - tcg_temp_free_i32(addr); - } - } - } - break; + /* Already handled by decodetree */ + return 1; default: /* Should never happen. */ return 1; |