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| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-21 18:20:26 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-22 15:10:20 +0200 |
| commit | 9a152519a9f767297c92b5840c91a22235295c8d (patch) | |
| tree | 51b4843de8404c7180737216b340c1d9a8a1a76a /tcg | |
| parent | c1cf85c9acb847c4871c0b241ced8fabf410d502 (diff) | |
| download | qemu-9a152519a9f767297c92b5840c91a22235295c8d.tar.gz qemu-9a152519a9f767297c92b5840c91a22235295c8d.tar.bz2 qemu-9a152519a9f767297c92b5840c91a22235295c8d.zip | |
tcg/mips: implement rotl/rotr ops on MIPS32R2
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.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/mips/tcg-target.c | 20 | ||||
| -rw-r--r-- | tcg/mips/tcg-target.h | 3 |
2 files changed, 22 insertions, 1 deletions
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c index 8b2f9fc7d6..592e42a2bc 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 c5c13f71d3..470314cc99 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 */ |