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| author | Richard Henderson <rth@twiddle.net> | 2013-09-05 12:11:27 -0400 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-11-18 15:56:30 +1000 |
| commit | 6f65c780b952485d7d1edbb72bf199e9803995e2 (patch) | |
| tree | ad1126698b7e5b294d8119ddf0652922c424bb29 /tcg/ia64/tcg-target.c | |
| parent | 5f7b16877a431c477d8dac92d0bb553d05c6402e (diff) | |
| download | qemu-6f65c780b952485d7d1edbb72bf199e9803995e2.zip qemu-6f65c780b952485d7d1edbb72bf199e9803995e2.tar.gz qemu-6f65c780b952485d7d1edbb72bf199e9803995e2.tar.bz2 | |
tcg-ia64: Handle constant calls
Using only indirect calls results in 3 bundles (one to load the
descriptor address), and 4 stop bits. By looking through the
descriptor to the constants, we can perform the call with 2
bundles and only 1 stop bit.
Acked-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/ia64/tcg-target.c')
| -rw-r--r-- | tcg/ia64/tcg-target.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c index 0581455..4566a33 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -226,6 +226,7 @@ enum { OPC_BR_CALL_SPTK_MANY_B5 = 0x02100001000ull, OPC_BR_RET_SPTK_MANY_B4 = 0x00108001100ull, OPC_BRL_SPTK_MANY_X3 = 0x18000001000ull, + OPC_BRL_CALL_SPTK_MANY_X4 = 0x1a000001000ull, OPC_CMP_LT_A6 = 0x18000000000ull, OPC_CMP_LTU_A6 = 0x1a000000000ull, OPC_CMP_EQ_A6 = 0x1c000000000ull, @@ -584,6 +585,8 @@ static inline uint64_t tcg_opc_l3(uint64_t imm) return (imm & 0x07fffffffff00000ull) >> 18; } +#define tcg_opc_l4 tcg_opc_l3 + static inline uint64_t tcg_opc_m1(int qp, uint64_t opc, int r1, int r3) { return opc @@ -668,6 +671,15 @@ static inline uint64_t tcg_opc_x3(int qp, uint64_t opc, uint64_t imm) | (qp & 0x3f); } +static inline uint64_t tcg_opc_x4(int qp, uint64_t opc, int b1, uint64_t imm) +{ + return opc + | ((imm & 0x0800000000000000ull) >> 23) /* i */ + | ((imm & 0x00000000000fffffull) << 13) /* imm20b */ + | ((b1 & 0x7) << 6) + | (qp & 0x3f); +} + /* * Relocations @@ -893,7 +905,23 @@ static void tcg_out_br(TCGContext *s, int label_index) } } -static inline void tcg_out_call(TCGContext *s, TCGArg addr) +static inline void tcg_out_calli(TCGContext *s, uintptr_t addr) +{ + /* Look through the function descriptor. */ + uintptr_t disp, *desc = (uintptr_t *)addr; + tcg_out_bundle(s, mlx, + INSN_NOP_M, + tcg_opc_l2 (desc[1]), + tcg_opc_x2 (TCG_REG_P0, OPC_MOVL_X2, TCG_REG_R1, desc[1])); + disp = (desc[0] - (uintptr_t)s->code_ptr) >> 4; + tcg_out_bundle(s, mLX, + INSN_NOP_M, + tcg_opc_l4 (disp), + tcg_opc_x4 (TCG_REG_P0, OPC_BRL_CALL_SPTK_MANY_X4, + TCG_REG_B0, disp)); +} + +static inline void tcg_out_callr(TCGContext *s, TCGReg addr) { tcg_out_bundle(s, MmI, tcg_opc_m1 (TCG_REG_P0, OPC_LD8_M1, TCG_REG_R2, addr), @@ -2004,7 +2032,11 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_br(s, args[0]); break; case INDEX_op_call: - tcg_out_call(s, args[0]); + if (likely(const_args[0])) { + tcg_out_calli(s, args[0]); + } else { + tcg_out_callr(s, args[0]); + } break; case INDEX_op_goto_tb: tcg_out_goto_tb(s, args[0]); @@ -2257,7 +2289,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, static const TCGTargetOpDef ia64_op_defs[] = { { INDEX_op_br, { } }, - { INDEX_op_call, { "r" } }, + { INDEX_op_call, { "ri" } }, { INDEX_op_exit_tb, { } }, { INDEX_op_goto_tb, { } }, |