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tcg/ia64: slightly optimize TLB access code 

It is possible to slightly optimize the TLB access code, by replacing
the movi + and instructions by a deposit instruction.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
master
Aurelien Jarno 2012-10-09 21:53:55 +02:00
parent 2174d1e1ff
commit 63975ea7df
1 changed files with 17 additions and 5 deletions
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22
tcg/ia64/tcg-target.c
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@ -230,6 +230,7 @@ enum {
OPC_CMP4_LT_A6 = 0x18400000000ull,
OPC_CMP4_LTU_A6 = 0x1a400000000ull,
OPC_CMP4_EQ_A6 = 0x1c400000000ull,
OPC_DEP_I14 = 0x0ae00000000ull,
OPC_DEP_Z_I12 = 0x0a600000000ull,
OPC_EXTR_I11 = 0x0a400002000ull,
OPC_EXTR_U_I11 = 0x0a400000000ull,
@ -501,6 +502,18 @@ static inline uint64_t tcg_opc_i12(int qp, uint64_t opc, int r1,
| (qp & 0x3f);
}
static inline uint64_t tcg_opc_i14(int qp, uint64_t opc, int r1, uint64_t imm,
int r3, uint64_t pos, uint64_t len)
{
return opc
| ((imm & 0x01) << 36)
| ((len & 0x3f) << 27)
| ((r3 & 0x7f) << 20)
| ((pos & 0x3f) << 14)
| ((r1 & 0x7f) << 6)
| (qp & 0x3f);
}
static inline uint64_t tcg_opc_i18(int qp, uint64_t opc, uint64_t imm)
{
return opc
@ -1444,9 +1457,7 @@ static inline void tcg_out_qemu_tlb(TCGContext *s, TCGArg addr_reg,
uint64_t offset_addend)
{
tcg_out_bundle(s, mII,
tcg_opc_a5 (TCG_REG_P0, OPC_ADDL_A5, TCG_REG_R3,
TARGET_PAGE_MASK | ((1 << s_bits) - 1),
TCG_REG_R0),
tcg_opc_m48(TCG_REG_P0, OPC_NOP_M48, 0),
tcg_opc_i11(TCG_REG_P0, OPC_EXTR_U_I11, TCG_REG_R2,
addr_reg, TARGET_PAGE_BITS, CPU_TLB_BITS - 1),
tcg_opc_i12(TCG_REG_P0, OPC_DEP_Z_I12, TCG_REG_R2,
@ -1468,8 +1479,9 @@ static inline void tcg_out_qemu_tlb(TCGContext *s, TCGArg addr_reg,
(TARGET_LONG_BITS == 32
? OPC_LD4_M3 : OPC_LD8_M3), TCG_REG_R56,
TCG_REG_R2, offset_addend - offset_rw),
tcg_opc_a1 (TCG_REG_P0, OPC_AND_A1, TCG_REG_R3,
TCG_REG_R3, TCG_REG_R57),
tcg_opc_i14(TCG_REG_P0, OPC_DEP_I14, TCG_REG_R3, 0,
TCG_REG_R57, 63 - s_bits,
TARGET_PAGE_BITS - s_bits - 1),
tcg_opc_a6 (TCG_REG_P0, OPC_CMP_EQ_A6, TCG_REG_P6,
TCG_REG_P7, TCG_REG_R3, TCG_REG_R56));
}