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tcg/aarch64: Split out target constraints to tcg-target-con-str.h 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-10-15 19:47:04 +00:00
parent 3440d583d6
commit abc730e18e
3 changed files with 33 additions and 43 deletions
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24
tcg/aarch64/tcg-target-con-str.h Normal file
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@ -0,0 +1,24 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Define AArch64 target-specific operand constraints.
* Copyright (c) 2021 Linaro
*/
/*
* Define constraint letters for register sets:
* REGS(letter, register_mask)
*/
REGS('r', ALL_GENERAL_REGS)
REGS('l', ALL_QLDST_REGS)
REGS('w', ALL_VECTOR_REGS)
/*
* Define constraint letters for constants:
* CONST(letter, TCG_CT_CONST_* bit set)
*/
CONST('A', TCG_CT_CONST_AIMM)
CONST('L', TCG_CT_CONST_LIMM)
CONST('M', TCG_CT_CONST_MONE)
CONST('O', TCG_CT_CONST_ORRI)
CONST('N', TCG_CT_CONST_ANDI)
CONST('Z', TCG_CT_CONST_ZERO)

51
tcg/aarch64/tcg-target.c.inc
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@ -126,51 +126,16 @@ static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
#define TCG_CT_CONST_ORRI 0x1000
#define TCG_CT_CONST_ANDI 0x2000
/* parse target specific constraints */
static const char *target_parse_constraint(TCGArgConstraint *ct,
const char *ct_str, TCGType type)
{
switch (*ct_str++) {
case 'r': /* general registers */
ct->regs |= 0xffffffffu;
break;
case 'w': /* advsimd registers */
ct->regs |= 0xffffffff00000000ull;
break;
case 'l': /* qemu_ld / qemu_st address, data_reg */
ct->regs = 0xffffffffu;
#define ALL_GENERAL_REGS 0xffffffffu
#define ALL_VECTOR_REGS 0xffffffff00000000ull
#ifdef CONFIG_SOFTMMU
/* x0 and x1 will be overwritten when reading the tlb entry,
and x2, and x3 for helper args, better to avoid using them. */
tcg_regset_reset_reg(ct->regs, TCG_REG_X0);
tcg_regset_reset_reg(ct->regs, TCG_REG_X1);
tcg_regset_reset_reg(ct->regs, TCG_REG_X2);
tcg_regset_reset_reg(ct->regs, TCG_REG_X3);
#define ALL_QLDST_REGS \
(ALL_GENERAL_REGS & ~((1 << TCG_REG_X0) | (1 << TCG_REG_X1) | \
(1 << TCG_REG_X2) | (1 << TCG_REG_X3)))
#else
#define ALL_QLDST_REGS ALL_GENERAL_REGS
#endif
break;
case 'A': /* Valid for arithmetic immediate (positive or negative). */
ct->ct |= TCG_CT_CONST_AIMM;
break;
case 'L': /* Valid for logical immediate. */
ct->ct |= TCG_CT_CONST_LIMM;
break;
case 'M': /* minus one */
ct->ct |= TCG_CT_CONST_MONE;
break;
case 'O': /* vector orr/bic immediate */
ct->ct |= TCG_CT_CONST_ORRI;
break;
case 'N': /* vector orr/bic immediate, inverted */
ct->ct |= TCG_CT_CONST_ANDI;
break;
case 'Z': /* zero */
ct->ct |= TCG_CT_CONST_ZERO;
break;
default:
return NULL;
}
return ct_str;
}
/* Match a constant valid for addition (12-bit, optionally shifted). */
static inline bool is_aimm(uint64_t val)

1
tcg/aarch64/tcg-target.h
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@ -155,5 +155,6 @@ void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t, uintptr_t);
#define TCG_TARGET_NEED_LDST_LABELS
#endif
#define TCG_TARGET_NEED_POOL_LABELS
#define TCG_TARGET_CON_STR_H
#endif /* AARCH64_TCG_TARGET_H */