20b6643324
The old ppc64 implementation replaces 2 or 4 insns, which leaves a race condition in which a thread could be stopped at a PC in the middle of the sequence, and when restarted does not see the complete address computation and branches to nowhere. The new implemetation replaces only one insn, swapping between b <dest> and mtctr r31 falling through to a general-case indirect branch. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
187 lines
7.0 KiB
C
187 lines
7.0 KiB
C
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef PPC_TCG_TARGET_H
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#define PPC_TCG_TARGET_H
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#ifdef _ARCH_PPC64
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# define TCG_TARGET_REG_BITS 64
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#else
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# define TCG_TARGET_REG_BITS 32
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#endif
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#define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1)
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#define TCG_TARGET_NB_REGS 64
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#define TCG_TARGET_INSN_UNIT_SIZE 4
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#define TCG_TARGET_TLB_DISPLACEMENT_BITS 16
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typedef enum {
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TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3,
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TCG_REG_R4, TCG_REG_R5, TCG_REG_R6, TCG_REG_R7,
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TCG_REG_R8, TCG_REG_R9, TCG_REG_R10, TCG_REG_R11,
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TCG_REG_R12, TCG_REG_R13, TCG_REG_R14, TCG_REG_R15,
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TCG_REG_R16, TCG_REG_R17, TCG_REG_R18, TCG_REG_R19,
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TCG_REG_R20, TCG_REG_R21, TCG_REG_R22, TCG_REG_R23,
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TCG_REG_R24, TCG_REG_R25, TCG_REG_R26, TCG_REG_R27,
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TCG_REG_R28, TCG_REG_R29, TCG_REG_R30, TCG_REG_R31,
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TCG_REG_V0, TCG_REG_V1, TCG_REG_V2, TCG_REG_V3,
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TCG_REG_V4, TCG_REG_V5, TCG_REG_V6, TCG_REG_V7,
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TCG_REG_V8, TCG_REG_V9, TCG_REG_V10, TCG_REG_V11,
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TCG_REG_V12, TCG_REG_V13, TCG_REG_V14, TCG_REG_V15,
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TCG_REG_V16, TCG_REG_V17, TCG_REG_V18, TCG_REG_V19,
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TCG_REG_V20, TCG_REG_V21, TCG_REG_V22, TCG_REG_V23,
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TCG_REG_V24, TCG_REG_V25, TCG_REG_V26, TCG_REG_V27,
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TCG_REG_V28, TCG_REG_V29, TCG_REG_V30, TCG_REG_V31,
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TCG_REG_CALL_STACK = TCG_REG_R1,
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TCG_AREG0 = TCG_REG_R27
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} TCGReg;
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typedef enum {
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tcg_isa_base,
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tcg_isa_2_06,
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tcg_isa_2_07,
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tcg_isa_3_00,
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tcg_isa_3_10,
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} TCGPowerISA;
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extern TCGPowerISA have_isa;
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extern bool have_altivec;
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extern bool have_vsx;
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#define have_isa_2_06 (have_isa >= tcg_isa_2_06)
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#define have_isa_2_07 (have_isa >= tcg_isa_2_07)
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#define have_isa_3_00 (have_isa >= tcg_isa_3_00)
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#define have_isa_3_10 (have_isa >= tcg_isa_3_10)
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/* optional instructions automatically implemented */
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#define TCG_TARGET_HAS_ext8u_i32 0 /* andi */
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#define TCG_TARGET_HAS_ext16u_i32 0
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/* optional instructions */
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#define TCG_TARGET_HAS_div_i32 1
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#define TCG_TARGET_HAS_rem_i32 have_isa_3_00
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#define TCG_TARGET_HAS_rot_i32 1
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#define TCG_TARGET_HAS_ext8s_i32 1
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#define TCG_TARGET_HAS_ext16s_i32 1
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#define TCG_TARGET_HAS_bswap16_i32 1
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#define TCG_TARGET_HAS_bswap32_i32 1
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#define TCG_TARGET_HAS_not_i32 1
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#define TCG_TARGET_HAS_neg_i32 1
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#define TCG_TARGET_HAS_andc_i32 1
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#define TCG_TARGET_HAS_orc_i32 1
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#define TCG_TARGET_HAS_eqv_i32 1
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#define TCG_TARGET_HAS_nand_i32 1
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#define TCG_TARGET_HAS_nor_i32 1
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#define TCG_TARGET_HAS_clz_i32 1
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#define TCG_TARGET_HAS_ctz_i32 have_isa_3_00
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#define TCG_TARGET_HAS_ctpop_i32 have_isa_2_06
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#define TCG_TARGET_HAS_deposit_i32 1
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#define TCG_TARGET_HAS_extract_i32 1
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#define TCG_TARGET_HAS_sextract_i32 0
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#define TCG_TARGET_HAS_extract2_i32 0
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#define TCG_TARGET_HAS_movcond_i32 1
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#define TCG_TARGET_HAS_mulu2_i32 0
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#define TCG_TARGET_HAS_muls2_i32 0
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#define TCG_TARGET_HAS_muluh_i32 1
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#define TCG_TARGET_HAS_mulsh_i32 1
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#define TCG_TARGET_HAS_qemu_st8_i32 0
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#if TCG_TARGET_REG_BITS == 64
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#define TCG_TARGET_HAS_add2_i32 0
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#define TCG_TARGET_HAS_sub2_i32 0
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#define TCG_TARGET_HAS_extrl_i64_i32 0
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#define TCG_TARGET_HAS_extrh_i64_i32 0
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#define TCG_TARGET_HAS_div_i64 1
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#define TCG_TARGET_HAS_rem_i64 have_isa_3_00
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#define TCG_TARGET_HAS_rot_i64 1
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#define TCG_TARGET_HAS_ext8s_i64 1
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#define TCG_TARGET_HAS_ext16s_i64 1
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#define TCG_TARGET_HAS_ext32s_i64 1
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#define TCG_TARGET_HAS_ext8u_i64 0
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#define TCG_TARGET_HAS_ext16u_i64 0
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#define TCG_TARGET_HAS_ext32u_i64 0
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#define TCG_TARGET_HAS_bswap16_i64 1
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#define TCG_TARGET_HAS_bswap32_i64 1
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#define TCG_TARGET_HAS_bswap64_i64 1
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#define TCG_TARGET_HAS_not_i64 1
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#define TCG_TARGET_HAS_neg_i64 1
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#define TCG_TARGET_HAS_andc_i64 1
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#define TCG_TARGET_HAS_orc_i64 1
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#define TCG_TARGET_HAS_eqv_i64 1
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#define TCG_TARGET_HAS_nand_i64 1
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#define TCG_TARGET_HAS_nor_i64 1
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#define TCG_TARGET_HAS_clz_i64 1
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#define TCG_TARGET_HAS_ctz_i64 have_isa_3_00
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#define TCG_TARGET_HAS_ctpop_i64 have_isa_2_06
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#define TCG_TARGET_HAS_deposit_i64 1
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#define TCG_TARGET_HAS_extract_i64 1
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#define TCG_TARGET_HAS_sextract_i64 0
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#define TCG_TARGET_HAS_extract2_i64 0
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#define TCG_TARGET_HAS_movcond_i64 1
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#define TCG_TARGET_HAS_add2_i64 1
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#define TCG_TARGET_HAS_sub2_i64 1
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#define TCG_TARGET_HAS_mulu2_i64 0
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#define TCG_TARGET_HAS_muls2_i64 0
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#define TCG_TARGET_HAS_muluh_i64 1
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#define TCG_TARGET_HAS_mulsh_i64 1
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#endif
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/*
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* While technically Altivec could support V64, it has no 64-bit store
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* instruction and substituting two 32-bit stores makes the generated
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* code quite large.
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*/
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#define TCG_TARGET_HAS_v64 have_vsx
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#define TCG_TARGET_HAS_v128 have_altivec
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#define TCG_TARGET_HAS_v256 0
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#define TCG_TARGET_HAS_andc_vec 1
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#define TCG_TARGET_HAS_orc_vec have_isa_2_07
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#define TCG_TARGET_HAS_nand_vec have_isa_2_07
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#define TCG_TARGET_HAS_nor_vec 1
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#define TCG_TARGET_HAS_eqv_vec have_isa_2_07
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#define TCG_TARGET_HAS_not_vec 1
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#define TCG_TARGET_HAS_neg_vec have_isa_3_00
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#define TCG_TARGET_HAS_abs_vec 0
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#define TCG_TARGET_HAS_roti_vec 0
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#define TCG_TARGET_HAS_rots_vec 0
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#define TCG_TARGET_HAS_rotv_vec 1
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#define TCG_TARGET_HAS_shi_vec 0
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#define TCG_TARGET_HAS_shs_vec 0
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#define TCG_TARGET_HAS_shv_vec 1
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#define TCG_TARGET_HAS_mul_vec 1
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#define TCG_TARGET_HAS_sat_vec 1
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#define TCG_TARGET_HAS_minmax_vec 1
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#define TCG_TARGET_HAS_bitsel_vec have_vsx
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#define TCG_TARGET_HAS_cmpsel_vec 0
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#define TCG_TARGET_DEFAULT_MO (0)
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#define TCG_TARGET_HAS_MEMORY_BSWAP 1
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#define TCG_TARGET_NEED_LDST_LABELS
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#define TCG_TARGET_NEED_POOL_LABELS
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#endif
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