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[Qemu-devel] [PATCH 08/10] tcg/mips: implement rotl/rotr ops on MIPS32R2
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 08/10] tcg/mips: implement rotl/rotr ops on MIPS32R2 |
Date: |
Fri, 21 Sep 2012 18:43:27 +0200 |
rotr operations can be optimized on MIPS32 Release 2 using the ROTR and
ROTRV instructions. Also implemented rotl operations by subtracting the
shift from 32.
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/mips/tcg-target.c | 20 ++++++++++++++++++++
tcg/mips/tcg-target.h | 3 ++-
2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c
index 8b2f9fc..592e42a 100644
--- a/tcg/mips/tcg-target.c
+++ b/tcg/mips/tcg-target.c
@@ -300,9 +300,11 @@ enum {
OPC_SPECIAL = 0x00 << 26,
OPC_SLL = OPC_SPECIAL | 0x00,
OPC_SRL = OPC_SPECIAL | 0x02,
+ OPC_ROTR = OPC_SPECIAL | (0x01 << 21) | 0x02,
OPC_SRA = OPC_SPECIAL | 0x03,
OPC_SLLV = OPC_SPECIAL | 0x04,
OPC_SRLV = OPC_SPECIAL | 0x06,
+ OPC_ROTRV = OPC_SPECIAL | (0x01 << 6) | 0x06,
OPC_SRAV = OPC_SPECIAL | 0x07,
OPC_JR = OPC_SPECIAL | 0x08,
OPC_JALR = OPC_SPECIAL | 0x09,
@@ -1420,6 +1422,22 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode
opc,
tcg_out_opc_reg(s, OPC_SRLV, args[0], args[2], args[1]);
}
break;
+ case INDEX_op_rotl_i32:
+ if (const_args[2]) {
+ tcg_out_opc_sa(s, OPC_ROTR, args[0], args[1], 0x20 - args[2]);
+ } else {
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_AT, 32);
+ tcg_out_opc_reg(s, OPC_SUBU, TCG_REG_AT, TCG_REG_AT, args[2]);
+ tcg_out_opc_reg(s, OPC_ROTRV, args[0], TCG_REG_AT, args[1]);
+ }
+ break;
+ case INDEX_op_rotr_i32:
+ if (const_args[2]) {
+ tcg_out_opc_sa(s, OPC_ROTR, args[0], args[1], args[2]);
+ } else {
+ tcg_out_opc_reg(s, OPC_ROTRV, args[0], args[2], args[1]);
+ }
+ break;
/* The bswap routines do not work on non-R2 CPU. In that case
we let TCG generating the corresponding code. */
@@ -1523,6 +1541,8 @@ static const TCGTargetOpDef mips_op_defs[] = {
{ INDEX_op_shl_i32, { "r", "rZ", "ri" } },
{ INDEX_op_shr_i32, { "r", "rZ", "ri" } },
{ INDEX_op_sar_i32, { "r", "rZ", "ri" } },
+ { INDEX_op_rotr_i32, { "r", "rZ", "ri" } },
+ { INDEX_op_rotl_i32, { "r", "rZ", "ri" } },
{ INDEX_op_bswap16_i32, { "r", "r" } },
{ INDEX_op_bswap32_i32, { "r", "r" } },
diff --git a/tcg/mips/tcg-target.h b/tcg/mips/tcg-target.h
index c5c13f7..470314c 100644
--- a/tcg/mips/tcg-target.h
+++ b/tcg/mips/tcg-target.h
@@ -80,7 +80,6 @@ typedef enum {
#define TCG_TARGET_HAS_div_i32 1
#define TCG_TARGET_HAS_not_i32 1
#define TCG_TARGET_HAS_nor_i32 1
-#define TCG_TARGET_HAS_rot_i32 0
#define TCG_TARGET_HAS_ext8s_i32 1
#define TCG_TARGET_HAS_ext16s_i32 1
#define TCG_TARGET_HAS_andc_i32 0
@@ -94,9 +93,11 @@ typedef enum {
#ifdef _MIPS_ARCH_MIPS32R2
#define TCG_TARGET_HAS_bswap16_i32 1
#define TCG_TARGET_HAS_bswap32_i32 1
+#define TCG_TARGET_HAS_rot_i32 1
#else
#define TCG_TARGET_HAS_bswap16_i32 0
#define TCG_TARGET_HAS_bswap32_i32 0
+#define TCG_TARGET_HAS_rot_i32 0
#endif
/* optional instructions automatically implemented */
--
1.7.10.4
- [Qemu-devel] [PATCH 00/10] tcg/mips: cleanup and improvements, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 09/10] tcg/mips: implement deposit op on MIPS32R2, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 07/10] tcg/mips: optimize bswap{16, 16s, 32} on MIPS32R2, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 01/10] tcg-mips: fix wrong usage of 'Z' constraint, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 04/10] tcg/mips: don't use global pointer, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 10/10] tcg/mips: implement movcond op on MIPS32R2, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH 08/10] tcg/mips: implement rotl/rotr ops on MIPS32R2,
Aurelien Jarno <=
- [Qemu-devel] [PATCH 05/10] tcg/mips: use stack for TCG temps, Aurelien Jarno, 2012/09/21
[Qemu-devel] [PATCH 02/10] tcg/mips: kill warnings in user mode, Aurelien Jarno, 2012/09/21
[Qemu-devel] [PATCH 06/10] tcg/mips: optimize brcond arg, 0, Aurelien Jarno, 2012/09/21
[Qemu-devel] [PATCH 03/10] tcg/mips: use TCGArg or TCGReg instead of int, Aurelien Jarno, 2012/09/21
Re: [Qemu-devel] [PATCH 00/10] tcg/mips: cleanup and improvements, Richard Henderson, 2012/09/21