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[Qemu-devel] [PATCH 06/19] tcg-ia64: Avoid unnecessary stop bit in tcg_o
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 06/19] tcg-ia64: Avoid unnecessary stop bit in tcg_out_alu |
Date: |
Thu, 5 Sep 2013 23:50:28 -0700 |
When performing an operation with two input registers, we'd leave
the stop bit (and thus an extra cycle) that's only needed when one
or the other input is a constant.
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/ia64/tcg-target.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c
index ad5a6b9..f0c5e0b 100644
--- a/tcg/ia64/tcg-target.c
+++ b/tcg/ia64/tcg-target.c
@@ -1042,31 +1042,26 @@ static inline void tcg_out_st(TCGContext *s, TCGType
type, TCGReg arg,
}
}
-static inline void tcg_out_alu(TCGContext *s, uint64_t opc_a1, TCGArg ret,
- TCGArg arg1, int const_arg1,
- TCGArg arg2, int const_arg2)
+static void tcg_out_alu(TCGContext *s, uint64_t opc_a1, TCGReg ret, TCGArg
arg1,
+ int const_arg1, TCGArg arg2, int const_arg2)
{
- uint64_t opc1, opc2;
+ uint64_t opc1 = 0, opc2 = 0;
if (const_arg1 && arg1 != 0) {
opc1 = tcg_opc_a5(TCG_REG_P0, OPC_ADDL_A5,
TCG_REG_R2, arg1, TCG_REG_R0);
arg1 = TCG_REG_R2;
- } else {
- opc1 = INSN_NOP_M;
}
if (const_arg2 && arg2 != 0) {
opc2 = tcg_opc_a5(TCG_REG_P0, OPC_ADDL_A5,
TCG_REG_R3, arg2, TCG_REG_R0);
arg2 = TCG_REG_R3;
- } else {
- opc2 = INSN_NOP_I;
}
- tcg_out_bundle(s, mII,
- opc1,
- opc2,
+ tcg_out_bundle(s, (opc1 || opc2 ? mII : miI),
+ opc1 ? opc1 : INSN_NOP_M,
+ opc2 ? opc2 : INSN_NOP_I,
tcg_opc_a1(TCG_REG_P0, opc_a1, ret, arg1, arg2));
}
--
1.8.3.1
- [Qemu-devel] [PATCH 00/19] tcg-ia64 fixes and improvements, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 01/19] tcg-ia64: Use TCGMemOp within qemu_ldst routines, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 02/19] tcg-ia64: Use shortcuts for nop insns, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 04/19] tcg-ia64: Simplify brcond, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 03/19] tcg-ia64: Handle constant calls, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 05/19] tcg-ia64: Move AREG0 to R32, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 06/19] tcg-ia64: Avoid unnecessary stop bit in tcg_out_alu,
Richard Henderson <=
- [Qemu-devel] [PATCH 08/19] tcg-ia64: Use SUB_A3 and ADDS_A4 for subtraction, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 07/19] tcg-ia64: Use ADDS for small addition, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 09/19] tcg-ia64: Use A3 form of logical operations, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 10/19] tcg-ia64 Introduce tcg_opc_mov_a, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 11/19] tcg-ia64 Introduce tcg_opc_movi_a, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 12/19] tcg-ia64 Introduce tcg_opc_ext_i, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 13/19] tcg-ia64 Introduce tcg_opc_bswap64_i, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 14/19] tcg-ia64: Re-bundle the tlb load, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 15/19] tcg-ia64: Move bswap for store into tlb load, Richard Henderson, 2013/09/06
- [Qemu-devel] [PATCH 16/19] tcg-ia64: Move tlb addend load into tlb read, Richard Henderson, 2013/09/06