diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-02-01 23:43:42 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-04-15 19:55:27 +0200 |
| commit | a9249dff4dc233f9377e7a3025aa124d8941b096 (patch) | |
| tree | 712ef296984b134d6861c0514de060b447100b36 /tcg | |
| parent | dce74c57bbf9839e72a2f83e3d994d4dd86f93c6 (diff) | |
| download | qemu-a9249dff4dc233f9377e7a3025aa124d8941b096.tar.gz qemu-a9249dff4dc233f9377e7a3025aa124d8941b096.tar.bz2 qemu-a9249dff4dc233f9377e7a3025aa124d8941b096.zip | |
tcg-ppc64: Improve and_i32 with constant
Use RLWINM
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/ppc64/tcg-target.c | 50 | ||||
| -rw-r--r-- | tcg/ppc64/tcg-target.h | 6 |
2 files changed, 53 insertions, 3 deletions
diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c index c8cae72e4a..1b0563fc41 100644 --- a/tcg/ppc64/tcg-target.c +++ b/tcg/ppc64/tcg-target.c @@ -527,6 +527,48 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg ret, } } +static inline bool mask_operand(uint32_t c, int *mb, int *me) +{ + uint32_t lsb, test; + + /* Accept a bit pattern like: + 0....01....1 + 1....10....0 + 0..01..10..0 + Keep track of the transitions. */ + if (c == 0 || c == -1) { + return false; + } + test = c; + lsb = test & -test; + test += lsb; + if (test & (test - 1)) { + return false; + } + + *me = clz32(lsb); + *mb = test ? clz32(test & -test) + 1 : 0; + return true; +} + +static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c) +{ + int mb, me; + + if ((c & 0xffff) == c) { + tcg_out32(s, ANDI | SAI(src, dst, c)); + return; + } else if ((c & 0xffff0000) == c) { + tcg_out32(s, ANDIS | SAI(src, dst, c >> 16)); + return; + } else if (mask_operand(c, &mb, &me)) { + tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me); + } else { + tcg_out_movi(s, TCG_TYPE_I32, 0, c); + tcg_out32(s, AND | SAB(src, dst, 0)); + } +} + static void tcg_out_zori32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c, int op_lo, int op_hi) { @@ -1352,9 +1394,15 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args, } break; - case INDEX_op_and_i64: case INDEX_op_and_i32: if (const_args[2]) { + tcg_out_andi32(s, args[0], args[1], args[2]); + } else { + tcg_out32(s, AND | SAB(args[1], args[0], args[2])); + } + break; + case INDEX_op_and_i64: + if (const_args[2]) { if ((args[2] & 0xffff) == args[2]) { tcg_out32(s, ANDI | SAI(args[1], args[0], args[2])); } else if ((args[2] & 0xffff0000) == args[2]) { diff --git a/tcg/ppc64/tcg-target.h b/tcg/ppc64/tcg-target.h index aa6a0f0306..f1c3067095 100644 --- a/tcg/ppc64/tcg-target.h +++ b/tcg/ppc64/tcg-target.h @@ -67,13 +67,15 @@ typedef enum { #define TCG_TARGET_STACK_ALIGN 16 #define TCG_TARGET_CALL_STACK_OFFSET 48 +/* optional instructions automatically implemented */ +#define TCG_TARGET_HAS_ext8u_i32 0 /* andi */ +#define TCG_TARGET_HAS_ext16u_i32 0 + /* optional instructions */ #define TCG_TARGET_HAS_div_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_ext8u_i32 0 -#define TCG_TARGET_HAS_ext16u_i32 0 #define TCG_TARGET_HAS_bswap16_i32 0 #define TCG_TARGET_HAS_bswap32_i32 0 #define TCG_TARGET_HAS_not_i32 1 |