diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/arm/tcg-target.inc.c | 57 |
1 files changed, 21 insertions, 36 deletions
diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c index 12a65cc..abf0c44 100644 --- a/tcg/arm/tcg-target.inc.c +++ b/tcg/arm/tcg-target.inc.c @@ -197,6 +197,24 @@ static inline bool reloc_pc24(tcg_insn_unit *code_ptr, tcg_insn_unit *target) return false; } +static inline bool reloc_pc13(tcg_insn_unit *code_ptr, tcg_insn_unit *target) +{ + ptrdiff_t offset = tcg_ptr_byte_diff(target, code_ptr) - 8; + + if (offset >= -0xfff && offset <= 0xfff) { + tcg_insn_unit insn = *code_ptr; + bool u = (offset >= 0); + if (!u) { + offset = -offset; + } + insn = deposit32(insn, 23, 1, u); + insn = deposit32(insn, 0, 12, offset); + *code_ptr = insn; + return true; + } + return false; +} + static bool patch_reloc(tcg_insn_unit *code_ptr, int type, intptr_t value, intptr_t addend) { @@ -205,39 +223,10 @@ static bool patch_reloc(tcg_insn_unit *code_ptr, int type, if (type == R_ARM_PC24) { return reloc_pc24(code_ptr, (tcg_insn_unit *)value); } else if (type == R_ARM_PC13) { - intptr_t diff = value - (uintptr_t)(code_ptr + 2); - tcg_insn_unit insn = *code_ptr; - bool u; - - if (diff >= -0xfff && diff <= 0xfff) { - u = (diff >= 0); - if (!u) { - diff = -diff; - } - } else { - int rd = extract32(insn, 12, 4); - int rt = rd == TCG_REG_PC ? TCG_REG_TMP : rd; - - if (diff < 0x1000 || diff >= 0x100000) { - return false; - } - - /* add rt, pc, #high */ - *code_ptr++ = ((insn & 0xf0000000) | (1 << 25) | ARITH_ADD - | (TCG_REG_PC << 16) | (rt << 12) - | (20 << 7) | (diff >> 12)); - /* ldr rd, [rt, #low] */ - insn = deposit32(insn, 12, 4, rt); - diff &= 0xfff; - u = 1; - } - insn = deposit32(insn, 23, 1, u); - insn = deposit32(insn, 0, 12, diff); - *code_ptr = insn; + return reloc_pc13(code_ptr, (tcg_insn_unit *)value); } else { g_assert_not_reached(); } - return true; } #define TCG_CT_CONST_ARM 0x100 @@ -605,12 +594,8 @@ static inline void tcg_out_ld8s_r(TCGContext *s, int cond, TCGReg rt, static void tcg_out_movi_pool(TCGContext *s, int cond, int rd, uint32_t arg) { - /* The 12-bit range on the ldr insn is sometimes a bit too small. - In order to get around that we require two insns, one of which - will usually be a nop, but may be replaced in patch_reloc. */ new_pool_label(s, arg, R_ARM_PC13, s->code_ptr, 0); tcg_out_ld32_12(s, cond, rd, TCG_REG_PC, 0); - tcg_out_nop(s); } static void tcg_out_movi32(TCGContext *s, int cond, int rd, uint32_t arg) @@ -1069,8 +1054,8 @@ static void tcg_out_call(TCGContext *s, tcg_insn_unit *addr) tcg_out_movi32(s, COND_AL, TCG_REG_TMP, addri); tcg_out_blx(s, COND_AL, TCG_REG_TMP); } else { - /* ??? Know that movi_pool emits exactly 2 insns. */ - tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 4); + /* ??? Know that movi_pool emits exactly 1 insn. */ + tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 0); tcg_out_movi_pool(s, COND_AL, TCG_REG_PC, addri); } } |