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qemu/tcg/tcg-opc.h
Aurelien Jarno b202d41ee7 tcg: forbid ld/st function to modify globals 
Mapping a memory address using a global and accessing it through
ld/st operations is currently broken. As it doesn't make any sense
to do that performance wise, let's forbid that.

Update the TCG documentation, and remove partial support for that.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-28 14:54:22 +01:00

245 lines
9.3 KiB
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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* DEF(name, oargs, iargs, cargs, flags)
*/
/* predefined ops */
DEF(end, 0, 0, 0, 0) /* must be kept first */
DEF(nop, 0, 0, 0, 0)
DEF(nop1, 0, 0, 1, 0)
DEF(nop2, 0, 0, 2, 0)
DEF(nop3, 0, 0, 3, 0)
DEF(nopn, 0, 0, 1, 0) /* variable number of parameters */
DEF(discard, 1, 0, 0, 0)
DEF(set_label, 0, 0, 1, TCG_OPF_BB_END)
DEF(call, 0, 1, 2, TCG_OPF_CALL_CLOBBER) /* variable number of parameters */
DEF(br, 0, 0, 1, TCG_OPF_BB_END)
#define IMPL(X) (X ? 0 : TCG_OPF_NOT_PRESENT)
#if TCG_TARGET_REG_BITS == 32
# define IMPL64 TCG_OPF_64BIT | TCG_OPF_NOT_PRESENT
#else
# define IMPL64 TCG_OPF_64BIT
#endif
DEF(mov_i32, 1, 1, 0, 0)
DEF(movi_i32, 1, 0, 1, 0)
DEF(setcond_i32, 1, 2, 1, 0)
DEF(movcond_i32, 1, 4, 1, IMPL(TCG_TARGET_HAS_movcond_i32))
/* load/store */
DEF(ld8u_i32, 1, 1, 1, 0)
DEF(ld8s_i32, 1, 1, 1, 0)
DEF(ld16u_i32, 1, 1, 1, 0)
DEF(ld16s_i32, 1, 1, 1, 0)
DEF(ld_i32, 1, 1, 1, 0)
DEF(st8_i32, 0, 2, 1, 0)
DEF(st16_i32, 0, 2, 1, 0)
DEF(st_i32, 0, 2, 1, 0)
/* arith */
DEF(add_i32, 1, 2, 0, 0)
DEF(sub_i32, 1, 2, 0, 0)
DEF(mul_i32, 1, 2, 0, 0)
DEF(div_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_div_i32))
DEF(divu_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_div_i32))
DEF(rem_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_div_i32))
DEF(remu_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_div_i32))
DEF(div2_i32, 2, 3, 0, IMPL(TCG_TARGET_HAS_div2_i32))
DEF(divu2_i32, 2, 3, 0, IMPL(TCG_TARGET_HAS_div2_i32))
DEF(and_i32, 1, 2, 0, 0)
DEF(or_i32, 1, 2, 0, 0)
DEF(xor_i32, 1, 2, 0, 0)
/* shifts/rotates */
DEF(shl_i32, 1, 2, 0, 0)
DEF(shr_i32, 1, 2, 0, 0)
DEF(sar_i32, 1, 2, 0, 0)
DEF(rotl_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_rot_i32))
DEF(rotr_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_rot_i32))
DEF(deposit_i32, 1, 2, 2, IMPL(TCG_TARGET_HAS_deposit_i32))
DEF(brcond_i32, 0, 2, 2, TCG_OPF_BB_END)
DEF(add2_i32, 2, 4, 0, IMPL(TCG_TARGET_REG_BITS == 32))
DEF(sub2_i32, 2, 4, 0, IMPL(TCG_TARGET_REG_BITS == 32))
DEF(brcond2_i32, 0, 4, 2, TCG_OPF_BB_END | IMPL(TCG_TARGET_REG_BITS == 32))
DEF(mulu2_i32, 2, 2, 0, IMPL(TCG_TARGET_REG_BITS == 32))
DEF(setcond2_i32, 1, 4, 1, IMPL(TCG_TARGET_REG_BITS == 32))
DEF(ext8s_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_ext8s_i32))
DEF(ext16s_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_ext16s_i32))
DEF(ext8u_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_ext8u_i32))
DEF(ext16u_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_ext16u_i32))
DEF(bswap16_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_bswap16_i32))
DEF(bswap32_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_bswap32_i32))
DEF(not_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_not_i32))
DEF(neg_i32, 1, 1, 0, IMPL(TCG_TARGET_HAS_neg_i32))
DEF(andc_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_andc_i32))
DEF(orc_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_orc_i32))
DEF(eqv_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_eqv_i32))
DEF(nand_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_nand_i32))
DEF(nor_i32, 1, 2, 0, IMPL(TCG_TARGET_HAS_nor_i32))
DEF(mov_i64, 1, 1, 0, IMPL64)
DEF(movi_i64, 1, 0, 1, IMPL64)
DEF(setcond_i64, 1, 2, 1, IMPL64)
DEF(movcond_i64, 1, 4, 1, IMPL64 | IMPL(TCG_TARGET_HAS_movcond_i64))
/* load/store */
DEF(ld8u_i64, 1, 1, 1, IMPL64)
DEF(ld8s_i64, 1, 1, 1, IMPL64)
DEF(ld16u_i64, 1, 1, 1, IMPL64)
DEF(ld16s_i64, 1, 1, 1, IMPL64)
DEF(ld32u_i64, 1, 1, 1, IMPL64)
DEF(ld32s_i64, 1, 1, 1, IMPL64)
DEF(ld_i64, 1, 1, 1, IMPL64)
DEF(st8_i64, 0, 2, 1, IMPL64)
DEF(st16_i64, 0, 2, 1, IMPL64)
DEF(st32_i64, 0, 2, 1, IMPL64)
DEF(st_i64, 0, 2, 1, IMPL64)
/* arith */
DEF(add_i64, 1, 2, 0, IMPL64)
DEF(sub_i64, 1, 2, 0, IMPL64)
DEF(mul_i64, 1, 2, 0, IMPL64)
DEF(div_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div_i64))
DEF(divu_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div_i64))
DEF(rem_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div_i64))
DEF(remu_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div_i64))
DEF(div2_i64, 2, 3, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div2_i64))
DEF(divu2_i64, 2, 3, 0, IMPL64 | IMPL(TCG_TARGET_HAS_div2_i64))
DEF(and_i64, 1, 2, 0, IMPL64)
DEF(or_i64, 1, 2, 0, IMPL64)
DEF(xor_i64, 1, 2, 0, IMPL64)
/* shifts/rotates */
DEF(shl_i64, 1, 2, 0, IMPL64)
DEF(shr_i64, 1, 2, 0, IMPL64)
DEF(sar_i64, 1, 2, 0, IMPL64)
DEF(rotl_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_rot_i64))
DEF(rotr_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_rot_i64))
DEF(deposit_i64, 1, 2, 2, IMPL64 | IMPL(TCG_TARGET_HAS_deposit_i64))
DEF(brcond_i64, 0, 2, 2, TCG_OPF_BB_END | IMPL64)
DEF(ext8s_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext8s_i64))
DEF(ext16s_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext16s_i64))
DEF(ext32s_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext32s_i64))
DEF(ext8u_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext8u_i64))
DEF(ext16u_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext16u_i64))
DEF(ext32u_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_ext32u_i64))
DEF(bswap16_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_bswap16_i64))
DEF(bswap32_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_bswap32_i64))
DEF(bswap64_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_bswap64_i64))
DEF(not_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_not_i64))
DEF(neg_i64, 1, 1, 0, IMPL64 | IMPL(TCG_TARGET_HAS_neg_i64))
DEF(andc_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_andc_i64))
DEF(orc_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_orc_i64))
DEF(eqv_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_eqv_i64))
DEF(nand_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_nand_i64))
DEF(nor_i64, 1, 2, 0, IMPL64 | IMPL(TCG_TARGET_HAS_nor_i64))
/* QEMU specific */
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
DEF(debug_insn_start, 0, 0, 2, 0)
#else
DEF(debug_insn_start, 0, 0, 1, 0)
#endif
DEF(exit_tb, 0, 0, 1, TCG_OPF_BB_END)
DEF(goto_tb, 0, 0, 1, TCG_OPF_BB_END)
/* Note: even if TARGET_LONG_BITS is not defined, the INDEX_op
constants must be defined */
#if TCG_TARGET_REG_BITS == 32
#if TARGET_LONG_BITS == 32
DEF(qemu_ld8u, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld8u, 1, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_ld8s, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld8s, 1, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_ld16u, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld16u, 1, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_ld16s, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld16s, 1, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_ld32, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld32, 1, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_ld64, 2, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_ld64, 2, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_st8, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_st8, 0, 3, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_st16, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_st16, 0, 3, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_st32, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_st32, 0, 3, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#if TARGET_LONG_BITS == 32
DEF(qemu_st64, 0, 3, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#else
DEF(qemu_st64, 0, 4, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif
#else /* TCG_TARGET_REG_BITS == 32 */
DEF(qemu_ld8u, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld8s, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld16u, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld16s, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld32, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld32u, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld32s, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_ld64, 1, 1, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_st8, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_st16, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_st32, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
DEF(qemu_st64, 0, 2, 1, TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS)
#endif /* TCG_TARGET_REG_BITS != 32 */
#undef IMPL
#undef IMPL64
#undef DEF
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