diff options
Diffstat (limited to 'target/arm/translate.c')
| -rw-r--r-- | target/arm/translate.c | 89 |
1 files changed, 33 insertions, 56 deletions
diff --git a/target/arm/translate.c b/target/arm/translate.c index 5b9b303467..b7d26f7cc8 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -7870,6 +7870,34 @@ static bool trans_ADR(DisasContext *s, arg_ri *a) return true; } +static bool trans_MOVW(DisasContext *s, arg_MOVW *a) +{ + TCGv_i32 tmp; + + if (!ENABLE_ARCH_6T2) { + return false; + } + + tmp = tcg_const_i32(a->imm); + store_reg(s, a->rd, tmp); + return true; +} + +static bool trans_MOVT(DisasContext *s, arg_MOVW *a) +{ + TCGv_i32 tmp; + + if (!ENABLE_ARCH_6T2) { + return false; + } + + tmp = load_reg(s, a->rd); + tcg_gen_ext16u_i32(tmp, tmp); + tcg_gen_ori_i32(tmp, tmp, a->imm << 16); + store_reg(s, a->rd, tmp); + return true; +} + /* * Multiply and multiply accumulate */ @@ -9762,7 +9790,7 @@ static bool trans_UDIV(DisasContext *s, arg_rrr *a) static void disas_arm_insn(DisasContext *s, unsigned int insn) { - unsigned int cond, val, op1, i, rn, rd; + unsigned int cond, val, op1, i, rn; TCGv_i32 tmp; TCGv_i32 tmp2; TCGv_i32 addr; @@ -10011,26 +10039,8 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn) /* fall back to legacy decoder */ if ((insn & 0x0f900000) == 0x03000000) { - if ((insn & (1 << 21)) == 0) { - ARCH(6T2); - rd = (insn >> 12) & 0xf; - val = ((insn >> 4) & 0xf000) | (insn & 0xfff); - if ((insn & (1 << 22)) == 0) { - /* MOVW */ - tmp = tcg_temp_new_i32(); - tcg_gen_movi_i32(tmp, val); - } else { - /* MOVT */ - tmp = load_reg(s, rd); - tcg_gen_ext16u_i32(tmp, tmp); - tcg_gen_ori_i32(tmp, tmp, val << 16); - } - store_reg(s, rd, tmp); - } else { - /* MSR (immediate) and hints */ - /* All done in decodetree. Illegal ops already signalled. */ - g_assert_not_reached(); - } + /* All done in decodetree. Illegal ops reach here. */ + goto illegal_op; } else if ((insn & 0x0f900000) == 0x01000000 && (insn & 0x00000090) != 0x00000090) { /* miscellaneous instructions */ @@ -10765,42 +10775,9 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn) /* * 0b1111_0xxx_xxxx_0xxx_xxxx_xxxx * - Data-processing (modified immediate, plain binary immediate) + * All in decodetree. */ - if (insn & (1 << 25)) { - /* - * 0b1111_0x1x_xxxx_0xxx_xxxx_xxxx - * - Data-processing (plain binary immediate) - */ - if (insn & (1 << 24)) { - /* Bitfield/Saturate, in decodetree */ - goto illegal_op; - } else { - imm = ((insn & 0x04000000) >> 15) - | ((insn & 0x7000) >> 4) | (insn & 0xff); - if (insn & (1 << 22)) { - /* 16-bit immediate. */ - imm |= (insn >> 4) & 0xf000; - if (insn & (1 << 23)) { - /* movt */ - tmp = load_reg(s, rd); - tcg_gen_ext16u_i32(tmp, tmp); - tcg_gen_ori_i32(tmp, tmp, imm << 16); - } else { - /* movw */ - tmp = tcg_temp_new_i32(); - tcg_gen_movi_i32(tmp, imm); - } - store_reg(s, rd, tmp); - } else { - /* Add/sub 12-bit immediate, in decodetree */ - goto illegal_op; - } - } - } else { - /* Data-processing (modified immediate) */ - /* All done in decodetree. Reach here for illegal ops. */ - goto illegal_op; - } + goto illegal_op; } break; case 12: |