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qemu-irix/tcg/arm/tcg-target.c

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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2008 Andrzej Zaborowski
*
* 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.
*/
#ifndef NDEBUG
static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
"%r0",
"%r1",
"%r2",
"%r3",
"%r4",
"%r5",
"%r6",
"%r7",
"%r8",
"%r9",
"%r10",
"%r11",
"%r12",
"%r13",
"%r14",
};
#endif
static const int tcg_target_reg_alloc_order[] = {
TCG_REG_R0,
TCG_REG_R1,
TCG_REG_R2,
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
TCG_REG_R13,
TCG_REG_R14,
};
static const int tcg_target_call_iarg_regs[4] = {
TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
};
static const int tcg_target_call_oarg_regs[2] = {
TCG_REG_R0, TCG_REG_R1
};
static void patch_reloc(uint8_t *code_ptr, int type,
tcg_target_long value, tcg_target_long addend)
{
switch (type) {
case R_ARM_ABS32:
*(uint32_t *) code_ptr = value;
break;
case R_ARM_CALL:
case R_ARM_JUMP24:
default:
tcg_abort();
case R_ARM_PC24:
*(uint32_t *) code_ptr = ((*(uint32_t *) code_ptr) & 0xff000000) |
(((value - ((tcg_target_long) code_ptr + 8)) >> 2) & 0xffffff);
break;
}
}
/* maximum number of register used for input function arguments */
static inline int tcg_target_get_call_iarg_regs_count(int flags)
{
return 4;
}
/* parse target specific constraints */
static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
{
const char *ct_str;
ct_str = *pct_str;
switch (ct_str[0]) {
case 'I':
ct->ct |= TCG_CT_CONST_ARM;
break;
case 'r':
#ifndef CONFIG_SOFTMMU
case 'd':
case 'D':
case 'x':
case 'X':
#endif
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
break;
#ifdef CONFIG_SOFTMMU
/* qemu_ld/st inputs (unless 'X', 'd' or 'D') */
case 'x':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
break;
/* qemu_ld64 data_reg */
case 'd':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
/* r1 is still needed to load data_reg2, so don't use it. */
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
break;
/* qemu_ld/st64 data_reg2 */
case 'D':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
/* r0, r1 and optionally r2 will be overwritten by the address
* and the low word of data, so don't use these. */
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
# if TARGET_LONG_BITS == 64
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
# endif
break;
# if TARGET_LONG_BITS == 64
/* qemu_ld/st addr_reg2 */
case 'X':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
/* r0 will be overwritten by the low word of base, so don't use it. */
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
break;
# endif
#endif
case '1':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
break;
case '2':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
break;
default:
return -1;
}
ct_str++;
*pct_str = ct_str;
return 0;
}
static inline uint32_t rotl(uint32_t val, int n)
{
return (val << n) | (val >> (32 - n));
}
/* ARM immediates for ALU instructions are made of an unsigned 8-bit
right-rotated by an even amount between 0 and 30. */
static inline int encode_imm(uint32_t imm)
{
int shift;
/* simple case, only lower bits */
if ((imm & ~0xff) == 0)
return 0;
/* then try a simple even shift */
shift = ctz32(imm) & ~1;
if (((imm >> shift) & ~0xff) == 0)
return 32 - shift;
/* now try harder with rotations */
if ((rotl(imm, 2) & ~0xff) == 0)
return 2;
if ((rotl(imm, 4) & ~0xff) == 0)
return 4;
if ((rotl(imm, 6) & ~0xff) == 0)
return 6;
/* imm can't be encoded */
return -1;
}
static inline int check_fit_imm(uint32_t imm)
{
return encode_imm(imm) >= 0;
}
/* Test if a constant matches the constraint.
* TODO: define constraints for:
*
* ldr/str offset: between -0xfff and 0xfff
* ldrh/strh offset: between -0xff and 0xff
* mov operand2: values represented with x << (2 * y), x < 0x100
* add, sub, eor...: ditto
*/
static inline int tcg_target_const_match(tcg_target_long val,
const TCGArgConstraint *arg_ct)
{
int ct;
ct = arg_ct->ct;
if (ct & TCG_CT_CONST)
return 1;
else if ((ct & TCG_CT_CONST_ARM) && check_fit_imm(val))
return 1;
else
return 0;
}
enum arm_data_opc_e {
ARITH_AND = 0x0,
ARITH_EOR = 0x1,
ARITH_SUB = 0x2,
ARITH_RSB = 0x3,
ARITH_ADD = 0x4,
ARITH_ADC = 0x5,
ARITH_SBC = 0x6,
ARITH_RSC = 0x7,
ARITH_TST = 0x8,
ARITH_CMP = 0xa,
ARITH_CMN = 0xb,
ARITH_ORR = 0xc,
ARITH_MOV = 0xd,
ARITH_BIC = 0xe,
ARITH_MVN = 0xf,
};
#define TO_CPSR(opc) \
((opc == ARITH_CMP || opc == ARITH_CMN || opc == ARITH_TST) << 20)
#define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00)
#define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20)
#define SHIFT_IMM_ASR(im) (((im) << 7) | 0x40)
#define SHIFT_IMM_ROR(im) (((im) << 7) | 0x60)
#define SHIFT_REG_LSL(rs) (((rs) << 8) | 0x10)
#define SHIFT_REG_LSR(rs) (((rs) << 8) | 0x30)
#define SHIFT_REG_ASR(rs) (((rs) << 8) | 0x50)
#define SHIFT_REG_ROR(rs) (((rs) << 8) | 0x70)
enum arm_cond_code_e {
COND_EQ = 0x0,
COND_NE = 0x1,
COND_CS = 0x2, /* Unsigned greater or equal */
COND_CC = 0x3, /* Unsigned less than */
COND_MI = 0x4, /* Negative */
COND_PL = 0x5, /* Zero or greater */
COND_VS = 0x6, /* Overflow */
COND_VC = 0x7, /* No overflow */
COND_HI = 0x8, /* Unsigned greater than */
COND_LS = 0x9, /* Unsigned less or equal */
COND_GE = 0xa,
COND_LT = 0xb,
COND_GT = 0xc,
COND_LE = 0xd,
COND_AL = 0xe,
};
static const uint8_t tcg_cond_to_arm_cond[10] = {
[TCG_COND_EQ] = COND_EQ,
[TCG_COND_NE] = COND_NE,
[TCG_COND_LT] = COND_LT,
[TCG_COND_GE] = COND_GE,
[TCG_COND_LE] = COND_LE,
[TCG_COND_GT] = COND_GT,
/* unsigned */
[TCG_COND_LTU] = COND_CC,
[TCG_COND_GEU] = COND_CS,
[TCG_COND_LEU] = COND_LS,
[TCG_COND_GTU] = COND_HI,
};
static inline void tcg_out_bx(TCGContext *s, int cond, int rn)
{
tcg_out32(s, (cond << 28) | 0x012fff10 | rn);
}
static inline void tcg_out_b(TCGContext *s, int cond, int32_t offset)
{
tcg_out32(s, (cond << 28) | 0x0a000000 |
(((offset - 8) >> 2) & 0x00ffffff));
}
static inline void tcg_out_b_noaddr(TCGContext *s, int cond)
{
#ifdef HOST_WORDS_BIGENDIAN
tcg_out8(s, (cond << 4) | 0x0a);
s->code_ptr += 3;
#else
s->code_ptr += 3;
tcg_out8(s, (cond << 4) | 0x0a);
#endif
}
static inline void tcg_out_bl(TCGContext *s, int cond, int32_t offset)
{
tcg_out32(s, (cond << 28) | 0x0b000000 |
(((offset - 8) >> 2) & 0x00ffffff));
}
static inline void tcg_out_dat_reg(TCGContext *s,
int cond, int opc, int rd, int rn, int rm, int shift)
{
tcg_out32(s, (cond << 28) | (0 << 25) | (opc << 21) | TO_CPSR(opc) |
(rn << 16) | (rd << 12) | shift | rm);
}
static inline void tcg_out_dat_reg2(TCGContext *s,
int cond, int opc0, int opc1, int rd0, int rd1,
int rn0, int rn1, int rm0, int rm1, int shift)
{
if (rd0 == rn1 || rd0 == rm1) {
tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) |
(rn0 << 16) | (8 << 12) | shift | rm0);
tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) |
(rn1 << 16) | (rd1 << 12) | shift | rm1);
tcg_out_dat_reg(s, cond, ARITH_MOV,
rd0, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
} else {
tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) |
(rn0 << 16) | (rd0 << 12) | shift | rm0);
tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) |
(rn1 << 16) | (rd1 << 12) | shift | rm1);
}
}
static inline void tcg_out_dat_imm(TCGContext *s,
int cond, int opc, int rd, int rn, int im)
{
tcg_out32(s, (cond << 28) | (1 << 25) | (opc << 21) | TO_CPSR(opc) |
(rn << 16) | (rd << 12) | im);
}
static inline void tcg_out_movi32(TCGContext *s,
int cond, int rd, int32_t arg)
{
int offset = (uint32_t) arg - ((uint32_t) s->code_ptr + 8);
/* TODO: This is very suboptimal, we can easily have a constant
* pool somewhere after all the instructions. */
if (arg < 0 && arg > -0x100)
return tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, (~arg) & 0xff);
if (offset < 0x100 && offset > -0x100)
return offset >= 0 ?
tcg_out_dat_imm(s, cond, ARITH_ADD, rd, 15, offset) :
tcg_out_dat_imm(s, cond, ARITH_SUB, rd, 15, -offset);
#ifdef __ARM_ARCH_7A__
/* use movw/movt */
/* movw */
tcg_out32(s, (cond << 28) | 0x03000000 | (rd << 12)
| ((arg << 4) & 0x000f0000) | (arg & 0xfff));
if (arg & 0xffff0000)
/* movt */
tcg_out32(s, (cond << 28) | 0x03400000 | (rd << 12)
| ((arg >> 12) & 0x000f0000) | ((arg >> 16) & 0xfff));
#else
tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0, arg & 0xff);
if (arg & 0x0000ff00)
tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
((arg >> 8) & 0xff) | 0xc00);
if (arg & 0x00ff0000)
tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
((arg >> 16) & 0xff) | 0x800);
if (arg & 0xff000000)
tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
((arg >> 24) & 0xff) | 0x400);
#endif
}
static inline void tcg_out_mul32(TCGContext *s,
int cond, int rd, int rs, int rm)
{
if (rd != rm)
tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
(rs << 8) | 0x90 | rm);
else if (rd != rs)
tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
(rm << 8) | 0x90 | rs);
else {
tcg_out32(s, (cond << 28) | ( 8 << 16) | (0 << 12) |
(rs << 8) | 0x90 | rm);
tcg_out_dat_reg(s, cond, ARITH_MOV,
rd, 0, 8, SHIFT_IMM_LSL(0));
}
}
static inline void tcg_out_umull32(TCGContext *s,
int cond, int rd0, int rd1, int rs, int rm)
{
if (rd0 != rm && rd1 != rm)
tcg_out32(s, (cond << 28) | 0x800090 |
(rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
else if (rd0 != rs && rd1 != rs)
tcg_out32(s, (cond << 28) | 0x800090 |
(rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
else {
tcg_out_dat_reg(s, cond, ARITH_MOV,
TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
tcg_out32(s, (cond << 28) | 0x800098 |
(rd1 << 16) | (rd0 << 12) | (rs << 8));
}
}
static inline void tcg_out_smull32(TCGContext *s,
int cond, int rd0, int rd1, int rs, int rm)
{
if (rd0 != rm && rd1 != rm)
tcg_out32(s, (cond << 28) | 0xc00090 |
(rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
else if (rd0 != rs && rd1 != rs)
tcg_out32(s, (cond << 28) | 0xc00090 |
(rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
else {
tcg_out_dat_reg(s, cond, ARITH_MOV,
TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
tcg_out32(s, (cond << 28) | 0xc00098 |
(rd1 << 16) | (rd0 << 12) | (rs << 8));
}
}
static inline void tcg_out_ld32_12(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x05900000 |
(rn << 16) | (rd << 12) | (im & 0xfff));
else
tcg_out32(s, (cond << 28) | 0x05100000 |
(rn << 16) | (rd << 12) | ((-im) & 0xfff));
}
static inline void tcg_out_st32_12(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x05800000 |
(rn << 16) | (rd << 12) | (im & 0xfff));
else
tcg_out32(s, (cond << 28) | 0x05000000 |
(rn << 16) | (rd << 12) | ((-im) & 0xfff));
}
static inline void tcg_out_ld32_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07900000 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st32_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07800000 |
(rn << 16) | (rd << 12) | rm);
}
/* Register pre-increment with base writeback. */
static inline void tcg_out_ld32_rwb(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07b00000 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st32_rwb(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07a00000 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_ld16u_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01d000b0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x015000b0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_st16u_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01c000b0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x014000b0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_ld16u_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x019000b0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st16u_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x018000b0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_ld16s_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01d000f0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x015000f0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_st16s_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01c000f0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x014000f0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_ld16s_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x019000f0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st16s_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x018000f0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_ld8_12(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x05d00000 |
(rn << 16) | (rd << 12) | (im & 0xfff));
else
tcg_out32(s, (cond << 28) | 0x05500000 |
(rn << 16) | (rd << 12) | ((-im) & 0xfff));
}
static inline void tcg_out_st8_12(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x05c00000 |
(rn << 16) | (rd << 12) | (im & 0xfff));
else
tcg_out32(s, (cond << 28) | 0x05400000 |
(rn << 16) | (rd << 12) | ((-im) & 0xfff));
}
static inline void tcg_out_ld8_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07d00000 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st8_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x07c00000 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_ld8s_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01d000d0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x015000d0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_st8s_8(TCGContext *s, int cond,
int rd, int rn, tcg_target_long im)
{
if (im >= 0)
tcg_out32(s, (cond << 28) | 0x01c000d0 |
(rn << 16) | (rd << 12) |
((im & 0xf0) << 4) | (im & 0xf));
else
tcg_out32(s, (cond << 28) | 0x014000d0 |
(rn << 16) | (rd << 12) |
(((-im) & 0xf0) << 4) | ((-im) & 0xf));
}
static inline void tcg_out_ld8s_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x019000d0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_st8s_r(TCGContext *s, int cond,
int rd, int rn, int rm)
{
tcg_out32(s, (cond << 28) | 0x018000d0 |
(rn << 16) | (rd << 12) | rm);
}
static inline void tcg_out_ld32u(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xfff || offset < -0xfff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_ld32_12(s, cond, rd, rn, offset);
}
static inline void tcg_out_st32(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xfff || offset < -0xfff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_st32_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_st32_12(s, cond, rd, rn, offset);
}
static inline void tcg_out_ld16u(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xff || offset < -0xff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_ld16u_8(s, cond, rd, rn, offset);
}
static inline void tcg_out_ld16s(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xff || offset < -0xff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_ld16s_8(s, cond, rd, rn, offset);
}
static inline void tcg_out_st16u(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xff || offset < -0xff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_st16u_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_st16u_8(s, cond, rd, rn, offset);
}
static inline void tcg_out_ld8u(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xfff || offset < -0xfff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_ld8_12(s, cond, rd, rn, offset);
}
static inline void tcg_out_ld8s(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xff || offset < -0xff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_ld8s_8(s, cond, rd, rn, offset);
}
static inline void tcg_out_st8u(TCGContext *s, int cond,
int rd, int rn, int32_t offset)
{
if (offset > 0xfff || offset < -0xfff) {
tcg_out_movi32(s, cond, TCG_REG_R8, offset);
tcg_out_st8_r(s, cond, rd, rn, TCG_REG_R8);
} else
tcg_out_st8_12(s, cond, rd, rn, offset);
}
static inline void tcg_out_goto(TCGContext *s, int cond, uint32_t addr)
{
int32_t val;
val = addr - (tcg_target_long) s->code_ptr;
if (val - 8 < 0x01fffffd && val - 8 > -0x01fffffd)
tcg_out_b(s, cond, val);
else {
#if 1
tcg_abort();
#else
if (cond == COND_AL) {
tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
} else {
tcg_out_movi32(s, cond, TCG_REG_R8, val - 8);
tcg_out_dat_reg(s, cond, ARITH_ADD,
15, 15, TCG_REG_R8, SHIFT_IMM_LSL(0));
}
#endif
}
}
static inline void tcg_out_call(TCGContext *s, int cond, uint32_t addr)
{
int32_t val;
#ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
#endif
val = addr - (tcg_target_long) s->code_ptr;
if (val < 0x01fffffd && val > -0x01fffffd)
tcg_out_bl(s, cond, val);
else {
#if 1
tcg_abort();
#else
if (cond == COND_AL) {
tcg_out_dat_imm(s, cond, ARITH_ADD, 14, 15, 4);
tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
} else {
tcg_out_movi32(s, cond, TCG_REG_R9, addr);
tcg_out_dat_imm(s, cond, ARITH_MOV, 14, 0, 15);
tcg_out_bx(s, cond, TCG_REG_R9);
}
#endif
}
#ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
#endif
}
static inline void tcg_out_callr(TCGContext *s, int cond, int arg)
{
#ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
#endif
/* TODO: on ARMv5 and ARMv6 replace with tcg_out_blx(s, cond, arg); */
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 15, SHIFT_IMM_LSL(0));
tcg_out_bx(s, cond, arg);
#ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
#endif
}
static inline void tcg_out_goto_label(TCGContext *s, int cond, int label_index)
{
TCGLabel *l = &s->labels[label_index];
if (l->has_value)
tcg_out_goto(s, cond, l->u.value);
else if (cond == COND_AL) {
tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
tcg_out_reloc(s, s->code_ptr, R_ARM_ABS32, label_index, 31337);
s->code_ptr += 4;
} else {
/* Probably this should be preferred even for COND_AL... */
tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, label_index, 31337);
tcg_out_b_noaddr(s, cond);
}
}
static void tcg_out_div_helper(TCGContext *s, int cond, const TCGArg *args,
void *helper_div, void *helper_rem, int shift)
{
int div_reg = args[0];
int rem_reg = args[1];
/* stmdb sp!, { r0 - r3, ip, lr } */
/* (Note that we need an even number of registers as per EABI) */
tcg_out32(s, (cond << 28) | 0x092d500f);
tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
tcg_out_call(s, cond, (uint32_t) helper_div);
tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 0, SHIFT_IMM_LSL(0));
/* ldmia sp, { r0 - r3, fp, lr } */
tcg_out32(s, (cond << 28) | 0x089d500f);
tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
tcg_out_call(s, cond, (uint32_t) helper_rem);
tcg_out_dat_reg(s, cond, ARITH_MOV, rem_reg, 0, 0, SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, cond, ARITH_MOV, div_reg, 0, 8, SHIFT_IMM_LSL(0));
/* ldr r0, [sp], #4 */
if (rem_reg != 0 && div_reg != 0)
tcg_out32(s, (cond << 28) | 0x04bd0004);
/* ldr r1, [sp], #4 */
if (rem_reg != 1 && div_reg != 1)
tcg_out32(s, (cond << 28) | 0x04bd1004);
/* ldr r2, [sp], #4 */
if (rem_reg != 2 && div_reg != 2)
tcg_out32(s, (cond << 28) | 0x04bd2004);
/* ldr r3, [sp], #4 */
if (rem_reg != 3 && div_reg != 3)
tcg_out32(s, (cond << 28) | 0x04bd3004);
/* ldr ip, [sp], #4 */
if (rem_reg != 12 && div_reg != 12)
tcg_out32(s, (cond << 28) | 0x04bdc004);
/* ldr lr, [sp], #4 */
if (rem_reg != 14 && div_reg != 14)
tcg_out32(s, (cond << 28) | 0x04bde004);
}
#ifdef CONFIG_SOFTMMU
#include "../../softmmu_defs.h"
static void *qemu_ld_helpers[4] = {
__ldb_mmu,
__ldw_mmu,
__ldl_mmu,
__ldq_mmu,
};
static void *qemu_st_helpers[4] = {
__stb_mmu,
__stw_mmu,
__stl_mmu,
__stq_mmu,
};
#endif
#define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
const TCGArg *args, int opc)
{
int addr_reg, data_reg, data_reg2;
#ifdef CONFIG_SOFTMMU
int mem_index, s_bits;
# if TARGET_LONG_BITS == 64
int addr_reg2;
# endif
uint32_t *label_ptr;
#endif
data_reg = *args++;
if (opc == 3)
data_reg2 = *args++;
else
data_reg2 = 0; /* suppress warning */
addr_reg = *args++;
#ifdef CONFIG_SOFTMMU
# if TARGET_LONG_BITS == 64
addr_reg2 = *args++;
# endif
mem_index = *args;
s_bits = opc & 3;
/* Should generate something like the following:
* shr r8, addr_reg, #TARGET_PAGE_BITS
* and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
* add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
*/
# if CPU_TLB_BITS > 8
# error
# endif
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
tcg_out_dat_imm(s, COND_AL, ARITH_AND,
0, 8, CPU_TLB_SIZE - 1);
tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
/* In the
* ldr r1 [r0, #(offsetof(CPUState, tlb_table[mem_index][0].addr_read))]
* below, the offset is likely to exceed 12 bits if mem_index != 0 and
* not exceed otherwise, so use an
* add r0, r0, #(mem_index * sizeof *CPUState.tlb_table)
* before.
*/
if (mem_index)
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 0, 0,
(mem_index << (TLB_SHIFT & 1)) |
((16 - (TLB_SHIFT >> 1)) << 8));
tcg_out_ld32_12(s, COND_AL, 1, 0,
offsetof(CPUState, tlb_table[0][0].addr_read));
tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
/* Check alignment. */
if (s_bits)
tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
0, addr_reg, (1 << s_bits) - 1);
# if TARGET_LONG_BITS == 64
/* XXX: possibly we could use a block data load or writeback in
* the first access. */
tcg_out_ld32_12(s, COND_EQ, 1, 0,
offsetof(CPUState, tlb_table[0][0].addr_read) + 4);
tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
0, 1, addr_reg2, SHIFT_IMM_LSL(0));
# endif
tcg_out_ld32_12(s, COND_EQ, 1, 0,
offsetof(CPUState, tlb_table[0][0].addend));
switch (opc) {
case 0:
tcg_out_ld8_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 0 | 4:
tcg_out_ld8s_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 1:
tcg_out_ld16u_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 1 | 4:
tcg_out_ld16s_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 2:
default:
tcg_out_ld32_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 3:
tcg_out_ld32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
tcg_out_ld32_12(s, COND_EQ, data_reg2, 1, 4);
break;
}
label_ptr = (void *) s->code_ptr;
tcg_out_b(s, COND_EQ, 8);
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
# endif
/* TODO: move this code to where the constants pool will be */
if (addr_reg)
tcg_out_dat_reg(s, cond, ARITH_MOV,
0, 0, addr_reg, SHIFT_IMM_LSL(0));
# if TARGET_LONG_BITS == 32
tcg_out_dat_imm(s, cond, ARITH_MOV, 1, 0, mem_index);
# else
if (addr_reg2 != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, addr_reg2, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
# endif
tcg_out_bl(s, cond, (tcg_target_long) qemu_ld_helpers[s_bits] -
(tcg_target_long) s->code_ptr);
switch (opc) {
case 0 | 4:
tcg_out_dat_reg(s, cond, ARITH_MOV,
0, 0, 0, SHIFT_IMM_LSL(24));
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg, 0, 0, SHIFT_IMM_ASR(24));
break;
case 1 | 4:
tcg_out_dat_reg(s, cond, ARITH_MOV,
0, 0, 0, SHIFT_IMM_LSL(16));
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg, 0, 0, SHIFT_IMM_ASR(16));
break;
case 0:
case 1:
case 2:
default:
if (data_reg)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg, 0, 0, SHIFT_IMM_LSL(0));
break;
case 3:
if (data_reg != 0)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg, 0, 0, SHIFT_IMM_LSL(0));
if (data_reg2 != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg2, 0, 1, SHIFT_IMM_LSL(0));
break;
}
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
# endif
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
#else /* !CONFIG_SOFTMMU */
if (GUEST_BASE) {
uint32_t offset = GUEST_BASE;
int i;
int rot;
while (offset) {
i = ctz32(offset) & ~1;
rot = ((32 - i) << 7) & 0xf00;
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 8, addr_reg,
((offset >> i) & 0xff) | rot);
addr_reg = 8;
offset &= ~(0xff << i);
}
}
switch (opc) {
case 0:
tcg_out_ld8_12(s, COND_AL, data_reg, addr_reg, 0);
break;
case 0 | 4:
tcg_out_ld8s_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 1:
tcg_out_ld16u_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 1 | 4:
tcg_out_ld16s_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 2:
default:
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
break;
case 3:
/* TODO: use block load -
* check that data_reg2 > data_reg or the other way */
if (data_reg == addr_reg) {
tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
} else {
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
}
break;
}
#endif
}
static inline void tcg_out_qemu_st(TCGContext *s, int cond,
const TCGArg *args, int opc)
{
int addr_reg, data_reg, data_reg2;
#ifdef CONFIG_SOFTMMU
int mem_index, s_bits;
# if TARGET_LONG_BITS == 64
int addr_reg2;
# endif
uint32_t *label_ptr;
#endif
data_reg = *args++;
if (opc == 3)
data_reg2 = *args++;
else
data_reg2 = 0; /* suppress warning */
addr_reg = *args++;
#ifdef CONFIG_SOFTMMU
# if TARGET_LONG_BITS == 64
addr_reg2 = *args++;
# endif
mem_index = *args;
s_bits = opc & 3;
/* Should generate something like the following:
* shr r8, addr_reg, #TARGET_PAGE_BITS
* and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
* add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
*/
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
tcg_out_dat_imm(s, COND_AL, ARITH_AND,
0, 8, CPU_TLB_SIZE - 1);
tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
/* In the
* ldr r1 [r0, #(offsetof(CPUState, tlb_table[mem_index][0].addr_write))]
* below, the offset is likely to exceed 12 bits if mem_index != 0 and
* not exceed otherwise, so use an
* add r0, r0, #(mem_index * sizeof *CPUState.tlb_table)
* before.
*/
if (mem_index)
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 0, 0,
(mem_index << (TLB_SHIFT & 1)) |
((16 - (TLB_SHIFT >> 1)) << 8));
tcg_out_ld32_12(s, COND_AL, 1, 0,
offsetof(CPUState, tlb_table[0][0].addr_write));
tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
/* Check alignment. */
if (s_bits)
tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
0, addr_reg, (1 << s_bits) - 1);
# if TARGET_LONG_BITS == 64
/* XXX: possibly we could use a block data load or writeback in
* the first access. */
tcg_out_ld32_12(s, COND_EQ, 1, 0,
offsetof(CPUState, tlb_table[0][0].addr_write)
+ 4);
tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
0, 1, addr_reg2, SHIFT_IMM_LSL(0));
# endif
tcg_out_ld32_12(s, COND_EQ, 1, 0,
offsetof(CPUState, tlb_table[0][0].addend));
switch (opc) {
case 0:
tcg_out_st8_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 0 | 4:
tcg_out_st8s_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 1:
tcg_out_st16u_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 1 | 4:
tcg_out_st16s_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 2:
default:
tcg_out_st32_r(s, COND_EQ, data_reg, addr_reg, 1);
break;
case 3:
tcg_out_st32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
tcg_out_st32_12(s, COND_EQ, data_reg2, 1, 4);
break;
}
label_ptr = (void *) s->code_ptr;
tcg_out_b(s, COND_EQ, 8);
/* TODO: move this code to where the constants pool will be */
if (addr_reg)
tcg_out_dat_reg(s, cond, ARITH_MOV,
0, 0, addr_reg, SHIFT_IMM_LSL(0));
# if TARGET_LONG_BITS == 32
switch (opc) {
case 0:
tcg_out_dat_imm(s, cond, ARITH_AND, 1, data_reg, 0xff);
tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
break;
case 1:
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, data_reg, SHIFT_IMM_LSL(16));
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, 1, SHIFT_IMM_LSR(16));
tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
break;
case 2:
if (data_reg != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, data_reg, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
break;
case 3:
if (data_reg != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, data_reg, SHIFT_IMM_LSL(0));
if (data_reg2 != 2)
tcg_out_dat_reg(s, cond, ARITH_MOV,
2, 0, data_reg2, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
break;
}
# else
if (addr_reg2 != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
1, 0, addr_reg2, SHIFT_IMM_LSL(0));
switch (opc) {
case 0:
tcg_out_dat_imm(s, cond, ARITH_AND, 2, data_reg, 0xff);
tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
break;
case 1:
tcg_out_dat_reg(s, cond, ARITH_MOV,
2, 0, data_reg, SHIFT_IMM_LSL(16));
tcg_out_dat_reg(s, cond, ARITH_MOV,
2, 0, 2, SHIFT_IMM_LSR(16));
tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
break;
case 2:
if (data_reg != 2)
tcg_out_dat_reg(s, cond, ARITH_MOV,
2, 0, data_reg, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
break;
case 3:
tcg_out_dat_imm(s, cond, ARITH_MOV, 8, 0, mem_index);
tcg_out32(s, (cond << 28) | 0x052d8010); /* str r8, [sp, #-0x10]! */
if (data_reg != 2)
tcg_out_dat_reg(s, cond, ARITH_MOV,
2, 0, data_reg, SHIFT_IMM_LSL(0));
if (data_reg2 != 3)
tcg_out_dat_reg(s, cond, ARITH_MOV,
3, 0, data_reg2, SHIFT_IMM_LSL(0));
break;
}
# endif
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
# endif
tcg_out_bl(s, cond, (tcg_target_long) qemu_st_helpers[s_bits] -
(tcg_target_long) s->code_ptr);
# if TARGET_LONG_BITS == 64
if (opc == 3)
tcg_out_dat_imm(s, cond, ARITH_ADD, 13, 13, 0x10);
# endif
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
# endif
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
#else /* !CONFIG_SOFTMMU */
if (GUEST_BASE) {
uint32_t offset = GUEST_BASE;
int i;
int rot;
while (offset) {
i = ctz32(offset) & ~1;
rot = ((32 - i) << 7) & 0xf00;
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 8, addr_reg,
((offset >> i) & 0xff) | rot);
addr_reg = 8;
offset &= ~(0xff << i);
}
}
switch (opc) {
case 0:
tcg_out_st8_12(s, COND_AL, data_reg, addr_reg, 0);
break;
case 0 | 4:
tcg_out_st8s_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 1:
tcg_out_st16u_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 1 | 4:
tcg_out_st16s_8(s, COND_AL, data_reg, addr_reg, 0);
break;
case 2:
default:
tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
break;
case 3:
/* TODO: use block store -
* check that data_reg2 > data_reg or the other way */
tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
tcg_out_st32_12(s, COND_AL, data_reg2, addr_reg, 4);
break;
}
#endif
}
static uint8_t *tb_ret_addr;
static inline void tcg_out_op(TCGContext *s, int opc,
const TCGArg *args, const int *const_args)
{
int c;
switch (opc) {
case INDEX_op_exit_tb:
#ifdef SAVE_LR
if (args[0] >> 8)
tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
else
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R0, 0, args[0]);
tcg_out_dat_reg(s, COND_AL, ARITH_MOV, 15, 0, 14, SHIFT_IMM_LSL(0));
if (args[0] >> 8)
tcg_out32(s, args[0]);
#else
{
uint8_t *ld_ptr = s->code_ptr;
if (args[0] >> 8)
tcg_out_ld32_12(s, COND_AL, 0, 15, 0);
else
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, 0, 0, args[0]);
tcg_out_goto(s, COND_AL, (tcg_target_ulong) tb_ret_addr);
if (args[0] >> 8) {
*ld_ptr = (uint8_t) (s->code_ptr - ld_ptr) - 8;
tcg_out32(s, args[0]);
}
}
#endif
break;
case INDEX_op_goto_tb:
if (s->tb_jmp_offset) {
/* Direct jump method */
#if defined(USE_DIRECT_JUMP)
s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
tcg_out_b(s, COND_AL, 8);
#else
tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
tcg_out32(s, 0);
#endif
} else {
/* Indirect jump method */
#if 1
c = (int) (s->tb_next + args[0]) - ((int) s->code_ptr + 8);
if (c > 0xfff || c < -0xfff) {
tcg_out_movi32(s, COND_AL, TCG_REG_R0,
(tcg_target_long) (s->tb_next + args[0]));
tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
} else
tcg_out_ld32_12(s, COND_AL, 15, 15, c);
#else
tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
tcg_out32(s, (tcg_target_long) (s->tb_next + args[0]));
#endif
}
s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
break;
case INDEX_op_call:
if (const_args[0])
tcg_out_call(s, COND_AL, args[0]);
else
tcg_out_callr(s, COND_AL, args[0]);
break;
case INDEX_op_jmp:
if (const_args[0])
tcg_out_goto(s, COND_AL, args[0]);
else
tcg_out_bx(s, COND_AL, args[0]);
break;
case INDEX_op_br:
tcg_out_goto_label(s, COND_AL, args[0]);
break;
case INDEX_op_ld8u_i32:
tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_ld8s_i32:
tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_ld16u_i32:
tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_ld16s_i32:
tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_ld_i32:
tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_st8_i32:
tcg_out_st8u(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_st16_i32:
tcg_out_st16u(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_st_i32:
tcg_out_st32(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_mov_i32:
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
args[0], 0, args[1], SHIFT_IMM_LSL(0));
break;
case INDEX_op_movi_i32:
tcg_out_movi32(s, COND_AL, args[0], args[1]);
break;
case INDEX_op_add_i32:
c = ARITH_ADD;
goto gen_arith;
case INDEX_op_sub_i32:
c = ARITH_SUB;
goto gen_arith;
case INDEX_op_and_i32:
c = ARITH_AND;
goto gen_arith;
case INDEX_op_or_i32:
c = ARITH_ORR;
goto gen_arith;
case INDEX_op_xor_i32:
c = ARITH_EOR;
/* Fall through. */
gen_arith:
if (const_args[2]) {
int rot;
rot = encode_imm(args[2]);
tcg_out_dat_imm(s, COND_AL, c,
args[0], args[1], rotl(args[2], rot) | (rot << 7));
} else
tcg_out_dat_reg(s, COND_AL, c,
args[0], args[1], args[2], SHIFT_IMM_LSL(0));
break;
case INDEX_op_add2_i32:
tcg_out_dat_reg2(s, COND_AL, ARITH_ADD, ARITH_ADC,
args[0], args[1], args[2], args[3],
args[4], args[5], SHIFT_IMM_LSL(0));
break;
case INDEX_op_sub2_i32:
tcg_out_dat_reg2(s, COND_AL, ARITH_SUB, ARITH_SBC,
args[0], args[1], args[2], args[3],
args[4], args[5], SHIFT_IMM_LSL(0));
break;
case INDEX_op_neg_i32:
tcg_out_dat_imm(s, COND_AL, ARITH_RSB, args[0], args[1], 0);
break;
case INDEX_op_not_i32:
tcg_out_dat_reg(s, COND_AL,
ARITH_MVN, args[0], 0, args[1], SHIFT_IMM_LSL(0));
break;
case INDEX_op_mul_i32:
tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]);
break;
case INDEX_op_mulu2_i32:
tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]);
break;
case INDEX_op_div2_i32:
tcg_out_div_helper(s, COND_AL, args,
tcg_helper_div_i64, tcg_helper_rem_i64,
SHIFT_IMM_ASR(31));
break;
case INDEX_op_divu2_i32:
tcg_out_div_helper(s, COND_AL, args,
tcg_helper_divu_i64, tcg_helper_remu_i64,
SHIFT_IMM_LSR(31));
break;
/* XXX: Perhaps args[2] & 0x1f is wrong */
case INDEX_op_shl_i32:
c = const_args[2] ?
SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]);
goto gen_shift32;
case INDEX_op_shr_i32:
c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) :
SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]);
goto gen_shift32;
case INDEX_op_sar_i32:
c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) :
SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]);
/* Fall through. */
gen_shift32:
tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c);
break;
case INDEX_op_brcond_i32:
tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
args[0], args[1], SHIFT_IMM_LSL(0));
tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], args[3]);
break;
case INDEX_op_brcond2_i32:
/* The resulting conditions are:
* TCG_COND_EQ --> a0 == a2 && a1 == a3,
* TCG_COND_NE --> (a0 != a2 && a1 == a3) || a1 != a3,
* TCG_COND_LT(U) --> (a0 < a2 && a1 == a3) || a1 < a3,
* TCG_COND_GE(U) --> (a0 >= a2 && a1 == a3) || (a1 >= a3 && a1 != a3),
* TCG_COND_LE(U) --> (a0 <= a2 && a1 == a3) || (a1 <= a3 && a1 != a3),
* TCG_COND_GT(U) --> (a0 > a2 && a1 == a3) || a1 > a3,
*/
tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
args[1], args[3], SHIFT_IMM_LSL(0));
tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0,
args[0], args[2], SHIFT_IMM_LSL(0));
tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[4]], args[5]);
break;
case INDEX_op_qemu_ld8u:
tcg_out_qemu_ld(s, COND_AL, args, 0);
break;
case INDEX_op_qemu_ld8s:
tcg_out_qemu_ld(s, COND_AL, args, 0 | 4);
break;
case INDEX_op_qemu_ld16u:
tcg_out_qemu_ld(s, COND_AL, args, 1);
break;
case INDEX_op_qemu_ld16s:
tcg_out_qemu_ld(s, COND_AL, args, 1 | 4);
break;
case INDEX_op_qemu_ld32u:
tcg_out_qemu_ld(s, COND_AL, args, 2);
break;
case INDEX_op_qemu_ld64:
tcg_out_qemu_ld(s, COND_AL, args, 3);
break;
case INDEX_op_qemu_st8:
tcg_out_qemu_st(s, COND_AL, args, 0);
break;
case INDEX_op_qemu_st16:
tcg_out_qemu_st(s, COND_AL, args, 1);
break;
case INDEX_op_qemu_st32:
tcg_out_qemu_st(s, COND_AL, args, 2);
break;
case INDEX_op_qemu_st64:
tcg_out_qemu_st(s, COND_AL, args, 3);
break;
case INDEX_op_ext8s_i32:
#ifdef __ARM_ARCH_7A__
/* sxtb */
tcg_out32(s, 0xe6af0070 | (args[0] << 12) | args[1]);
#else
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
args[0], 0, args[1], SHIFT_IMM_LSL(24));
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
args[0], 0, args[0], SHIFT_IMM_ASR(24));
#endif
break;
case INDEX_op_ext16s_i32:
#ifdef __ARM_ARCH_7A__
/* sxth */
tcg_out32(s, 0xe6bf0070 | (args[0] << 12) | args[1]);
#else
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
args[0], 0, args[1], SHIFT_IMM_LSL(16));
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
args[0], 0, args[0], SHIFT_IMM_ASR(16));
#endif
break;
default:
tcg_abort();
}
}
static const TCGTargetOpDef arm_op_defs[] = {
{ INDEX_op_exit_tb, { } },
{ INDEX_op_goto_tb, { } },
{ INDEX_op_call, { "ri" } },
{ INDEX_op_jmp, { "ri" } },
{ INDEX_op_br, { } },
{ INDEX_op_mov_i32, { "r", "r" } },
{ INDEX_op_movi_i32, { "r" } },
{ INDEX_op_ld8u_i32, { "r", "r" } },
{ INDEX_op_ld8s_i32, { "r", "r" } },
{ INDEX_op_ld16u_i32, { "r", "r" } },
{ INDEX_op_ld16s_i32, { "r", "r" } },
{ INDEX_op_ld_i32, { "r", "r" } },
{ INDEX_op_st8_i32, { "r", "r" } },
{ INDEX_op_st16_i32, { "r", "r" } },
{ INDEX_op_st_i32, { "r", "r" } },
/* TODO: "r", "r", "ri" */
{ INDEX_op_add_i32, { "r", "r", "rI" } },
{ INDEX_op_sub_i32, { "r", "r", "rI" } },
{ INDEX_op_mul_i32, { "r", "r", "r" } },
{ INDEX_op_mulu2_i32, { "r", "r", "r", "r" } },
{ INDEX_op_div2_i32, { "r", "r", "r", "1", "2" } },
{ INDEX_op_divu2_i32, { "r", "r", "r", "1", "2" } },
{ INDEX_op_and_i32, { "r", "r", "rI" } },
{ INDEX_op_or_i32, { "r", "r", "rI" } },
{ INDEX_op_xor_i32, { "r", "r", "rI" } },
{ INDEX_op_neg_i32, { "r", "r" } },
{ INDEX_op_not_i32, { "r", "r" } },
{ INDEX_op_shl_i32, { "r", "r", "ri" } },
{ INDEX_op_shr_i32, { "r", "r", "ri" } },
{ INDEX_op_sar_i32, { "r", "r", "ri" } },
{ INDEX_op_brcond_i32, { "r", "r" } },
/* TODO: "r", "r", "r", "r", "ri", "ri" */
{ INDEX_op_add2_i32, { "r", "r", "r", "r", "r", "r" } },
{ INDEX_op_sub2_i32, { "r", "r", "r", "r", "r", "r" } },
{ INDEX_op_brcond2_i32, { "r", "r", "r", "r" } },
{ INDEX_op_qemu_ld8u, { "r", "x", "X" } },
{ INDEX_op_qemu_ld8s, { "r", "x", "X" } },
{ INDEX_op_qemu_ld16u, { "r", "x", "X" } },
{ INDEX_op_qemu_ld16s, { "r", "x", "X" } },
{ INDEX_op_qemu_ld32u, { "r", "x", "X" } },
{ INDEX_op_qemu_ld64, { "d", "r", "x", "X" } },
{ INDEX_op_qemu_st8, { "x", "x", "X" } },
{ INDEX_op_qemu_st16, { "x", "x", "X" } },
{ INDEX_op_qemu_st32, { "x", "x", "X" } },
{ INDEX_op_qemu_st64, { "x", "D", "x", "X" } },
{ INDEX_op_ext8s_i32, { "r", "r" } },
{ INDEX_op_ext16s_i32, { "r", "r" } },
{ -1 },
};
void tcg_target_init(TCGContext *s)
{
/* fail safe */
if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
tcg_abort();
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0,
((2 << TCG_REG_R14) - 1) & ~(1 << TCG_REG_R8));
tcg_regset_set32(tcg_target_call_clobber_regs, 0,
((2 << TCG_REG_R3) - 1) |
(1 << TCG_REG_R12) | (1 << TCG_REG_R14));
tcg_regset_clear(s->reserved_regs);
#ifdef SAVE_LR
tcg_regset_set_reg(s->reserved_regs, TCG_REG_R14);
#endif
tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
tcg_regset_set_reg(s->reserved_regs, TCG_REG_R8);
tcg_add_target_add_op_defs(arm_op_defs);
}
static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_out_ld32u(s, COND_AL, arg, arg1, arg2);
}
static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
int arg1, tcg_target_long arg2)
{
tcg_out_st32(s, COND_AL, arg, arg1, arg2);
}
static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
{
if (val > 0)
if (val < 0x100)
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, reg, reg, val);
else
tcg_abort();
else if (val < 0) {
if (val > -0x100)
tcg_out_dat_imm(s, COND_AL, ARITH_SUB, reg, reg, -val);
else
tcg_abort();
}
}
static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
{
tcg_out_dat_reg(s, COND_AL, ARITH_MOV, ret, 0, arg, SHIFT_IMM_LSL(0));
}
static inline void tcg_out_movi(TCGContext *s, TCGType type,
int ret, tcg_target_long arg)
{
tcg_out_movi32(s, COND_AL, ret, arg);
}
void tcg_target_qemu_prologue(TCGContext *s)
{
/* stmdb sp!, { r9 - r11, lr } */
tcg_out32(s, (COND_AL << 28) | 0x092d4e00);
tcg_out_bx(s, COND_AL, TCG_REG_R0);
tb_ret_addr = s->code_ptr;
/* ldmia sp!, { r9 - r11, pc } */
tcg_out32(s, (COND_AL << 28) | 0x08bd8e00);
}
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