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e936243aca
qemu-e2k/tcg/arm/tcg-target.c
balrog e936243aca A branch insn must not overwrite the branch target before relocation. 
When a branch to label is translated it generates a reloc that is filled in
when the label is translated.  However, when handling an exception and
searching for the pc we abort the translation early and we sometimes
translate the branch but not the corresponding label and so no relocation
is done.  When the block is executed again the branch points to no-where.

It seems tcg/sparc/ is going to suffer from the same issue.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4547 c046a42c-6fe2-441c-8c8c-71466251a162
2008-05-23 18:50:44 +00:00

1572 lines
49 KiB
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.
*/
const char *tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
"%r0",
"%r1",
"%r2",
"%r3",
"%r4",
"%r5",
"%r6",
"%r7",
"%r8",
"%r9",
"%r10",
"%r11",
"%r12",
"%r13",
"%r14",
};
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,
};
const int tcg_target_call_iarg_regs[4] = {
TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
};
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;
}
#define USE_TLB
/* parse target specific constraints */
int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
{
const char *ct_str;
ct_str = *pct_str;
switch (ct_str[0]) {
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 'd', 'D' or 'X') */
case 'x':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
# ifdef USE_TLB
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
# endif
break;
/* qemu_ld/st data_reg */
case 'd':
ct->ct |= TCG_CT_REG;
tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
/* r0 and optionally r1 will be overwritten by the address
* so don't use these. */
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
# if TARGET_LONG_BITS == 64 || defined(USE_TLB)
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
# endif
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);
# ifdef USE_TLB
tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
# endif
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;
}
/* 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
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_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) << 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 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)
{
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) |
(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);
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);
}
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);
}
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
extern void __ldb_mmu(void);
extern void __ldw_mmu(void);
extern void __ldl_mmu(void);
extern void __ldq_mmu(void);
extern void __stb_mmu(void);
extern void __stw_mmu(void);
extern void __stl_mmu(void);
extern void __stq_mmu(void);
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
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
# ifdef USE_TLB
uint32_t *label_ptr;
# endif
#endif
data_reg = *args++;
if (opc == 3)
data_reg2 = *args++;
else
data_reg2 = 0; /* surpress warning */
addr_reg = *args++;
#if TARGET_LONG_BITS == 64
addr_reg2 = *args++;
#endif
#ifdef CONFIG_SOFTMMU
mem_index = *args;
s_bits = opc & 3;
# ifdef USE_TLB
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
8, 0, addr_reg, SHIFT_IMM_ROR(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));
# define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
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));
/* TODO: alignment check?
* if (s_bits)
* tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
* 0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
*/
# 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:
/* TODO: must write back */
tcg_out_ld32_r(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);
# endif
# 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_reg2 != 1)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg2, 0, 1, SHIFT_IMM_LSL(0));
if (data_reg != 0)
tcg_out_dat_reg(s, cond, ARITH_MOV,
data_reg, 0, 0, SHIFT_IMM_LSL(0));
break;
}
# ifdef SAVE_LR
tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
# endif
# ifdef USE_TLB
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
# endif
#else
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 */
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
# ifdef USE_TLB
uint32_t *label_ptr;
# endif
#endif
data_reg = *args++;
if (opc == 3)
data_reg2 = *args++;
else
data_reg2 = 0; /* surpress warning */
addr_reg = *args++;
#if TARGET_LONG_BITS == 64
addr_reg2 = *args++;
#endif
#ifdef CONFIG_SOFTMMU
mem_index = *args;
s_bits = opc & 3;
# ifdef USE_TLB
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
8, 0, addr_reg, SHIFT_IMM_ROR(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));
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));
/* TODO: alignment check?
* if (s_bits)
* tcg_out_data_reg(s, COND_EQ, ARITH_EOR,
* 0, 1, 8, SHIFT_IMM_LSR(32 - s_bits));
*/
# 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:
/* TODO: must write back */
tcg_out_st32_r(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);
# endif
# 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
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, 3, 0, mem_index);
tcg_out32(s, (cond << 28) | 0x052d3010); /* str r3, [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
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
# ifdef USE_TLB
*label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
# endif
#else
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 */
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
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)
tcg_out32(s, args[0]);
#endif
break;
case INDEX_op_goto_tb:
if (s->tb_jmp_offset) {
/* Direct jump method */
#if 1
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:
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_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:
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));
break;
case INDEX_op_ext16s_i32:
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));
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", "r" } },
{ INDEX_op_sub_i32, { "r", "r", "r" } },
{ 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", "r" } },
{ INDEX_op_or_i32, { "r", "r", "r" } },
{ INDEX_op_xor_i32, { "r", "r", "r" } },
{ INDEX_op_neg_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, { "r", "d", "x", "X" } },
{ INDEX_op_qemu_st8, { "d", "x", "X" } },
{ INDEX_op_qemu_st16, { "d", "x", "X" } },
{ INDEX_op_qemu_st32, { "d", "x", "X" } },
{ INDEX_op_qemu_st64, { "d", "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);
}
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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