diff options
Diffstat (limited to 'tcg/ppc')
| -rw-r--r-- | tcg/ppc/tcg-target.inc.c | 67 |
1 files changed, 39 insertions, 28 deletions
diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c index 74f9b4aa34..86f7de5f7e 100644 --- a/tcg/ppc/tcg-target.inc.c +++ b/tcg/ppc/tcg-target.inc.c @@ -222,33 +222,6 @@ static inline void tcg_out_bc_noaddr(TCGContext *s, int insn) tcg_out32(s, insn | retrans); } -static void patch_reloc(tcg_insn_unit *code_ptr, int type, - intptr_t value, intptr_t addend) -{ - tcg_insn_unit *target; - tcg_insn_unit old; - - value += addend; - target = (tcg_insn_unit *)value; - - switch (type) { - case R_PPC_REL14: - reloc_pc14(code_ptr, target); - break; - case R_PPC_REL24: - reloc_pc24(code_ptr, target); - break; - case R_PPC_ADDR16: - assert(value == (int16_t)value); - old = *code_ptr; - old = deposit32(old, 0, 16, value); - *code_ptr = old; - break; - default: - tcg_abort(); - } -} - /* parse target specific constraints */ static const char *target_parse_constraint(TCGArgConstraint *ct, const char *ct_str, TCGType type) @@ -552,6 +525,43 @@ static const uint32_t tcg_to_isel[] = { [TCG_COND_GTU] = ISEL | BC_(7, CR_GT), }; +static void patch_reloc(tcg_insn_unit *code_ptr, int type, + intptr_t value, intptr_t addend) +{ + tcg_insn_unit *target; + tcg_insn_unit old; + + value += addend; + target = (tcg_insn_unit *)value; + + switch (type) { + case R_PPC_REL14: + reloc_pc14(code_ptr, target); + break; + case R_PPC_REL24: + reloc_pc24(code_ptr, target); + break; + case R_PPC_ADDR16: + /* We are abusing this relocation type. This points to a pair + of insns, addis + load. If the displacement is small, we + can nop out the addis. */ + if (value == (int16_t)value) { + code_ptr[0] = NOP; + old = deposit32(code_ptr[1], 0, 16, value); + code_ptr[1] = deposit32(old, 16, 5, TCG_REG_TB); + } else { + int16_t lo = value; + int hi = value - lo; + assert(hi + lo == value); + code_ptr[0] = deposit32(code_ptr[0], 0, 16, hi >> 16); + code_ptr[1] = deposit32(code_ptr[1], 0, 16, lo); + } + break; + default: + g_assert_not_reached(); + } +} + static void tcg_out_mem_long(TCGContext *s, int opi, int opx, TCGReg rt, TCGReg base, tcg_target_long offset); @@ -690,7 +700,8 @@ static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret, if (!in_prologue && USE_REG_TB) { new_pool_label(s, arg, R_PPC_ADDR16, s->code_ptr, -(intptr_t)s->code_gen_ptr); - tcg_out32(s, LD | TAI(ret, TCG_REG_TB, 0)); + tcg_out32(s, ADDIS | TAI(ret, TCG_REG_TB, 0)); + tcg_out32(s, LD | TAI(ret, ret, 0)); return; } |