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| author | Richard Henderson <rth@twiddle.net> | 2013-01-30 21:16:38 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-04-15 20:09:44 +0200 |
| commit | 5d221582009d942de77a538d21b09c9120929dc5 (patch) | |
| tree | 534388d03e5ddd476c88940c20fe9d57ac3ac92b /tcg | |
| parent | 313d91c778e9a2a684d5aacc09750421a6612416 (diff) | |
| download | qemu-5d221582009d942de77a538d21b09c9120929dc5.zip qemu-5d221582009d942de77a538d21b09c9120929dc5.tar.gz qemu-5d221582009d942de77a538d21b09c9120929dc5.tar.bz2 | |
tcg-ppc64: Implement bswap16 and bswap32
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/ppc64/tcg-target.c | 43 | ||||
| -rw-r--r-- | tcg/ppc64/tcg-target.h | 8 |
2 files changed, 47 insertions, 4 deletions
diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c index 18338a2..1c6be96 100644 --- a/tcg/ppc64/tcg-target.c +++ b/tcg/ppc64/tcg-target.c @@ -1676,6 +1676,44 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args, const_args[2]); break; + case INDEX_op_bswap16_i32: + case INDEX_op_bswap16_i64: + a0 = args[0], a1 = args[1]; + /* a1 = abcd */ + if (a0 != a1) { + /* a0 = (a1 r<< 24) & 0xff # 000c */ + tcg_out_rlw(s, RLWINM, a0, a1, 24, 24, 31); + /* a0 = (a0 & ~0xff00) | (a1 r<< 8) & 0xff00 # 00dc */ + tcg_out_rlw(s, RLWIMI, a0, a1, 8, 16, 23); + } else { + /* r0 = (a1 r<< 8) & 0xff00 # 00d0 */ + tcg_out_rlw(s, RLWINM, TCG_REG_R0, a1, 8, 16, 23); + /* a0 = (a1 r<< 24) & 0xff # 000c */ + tcg_out_rlw(s, RLWINM, a0, a1, 24, 24, 31); + /* a0 = a0 | r0 # 00dc */ + tcg_out32(s, OR | SAB(TCG_REG_R0, a0, a0)); + } + break; + + case INDEX_op_bswap32_i32: + case INDEX_op_bswap32_i64: + /* Stolen from gcc's builtin_bswap32 */ + a1 = args[1]; + a0 = args[0] == a1 ? TCG_REG_R0 : args[0]; + + /* a1 = args[1] # abcd */ + /* a0 = rotate_left (a1, 8) # bcda */ + tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31); + /* a0 = (a0 & ~0xff000000) | ((a1 r<< 24) & 0xff000000) # dcda */ + tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7); + /* a0 = (a0 & ~0x0000ff00) | ((a1 r<< 24) & 0x0000ff00) # dcba */ + tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23); + + if (a0 == TCG_REG_R0) { + tcg_out_mov(s, TCG_TYPE_I64, args[0], a0); + } + break; + default: tcg_dump_ops (s); tcg_abort (); @@ -1781,6 +1819,11 @@ static const TCGTargetOpDef ppc_op_defs[] = { { INDEX_op_setcond_i32, { "r", "r", "ri" } }, { INDEX_op_setcond_i64, { "r", "r", "ri" } }, + { INDEX_op_bswap16_i32, { "r", "r" } }, + { INDEX_op_bswap16_i64, { "r", "r" } }, + { INDEX_op_bswap32_i32, { "r", "r" } }, + { INDEX_op_bswap32_i64, { "r", "r" } }, + { -1 }, }; diff --git a/tcg/ppc64/tcg-target.h b/tcg/ppc64/tcg-target.h index b2713a0..7cd1e98 100644 --- a/tcg/ppc64/tcg-target.h +++ b/tcg/ppc64/tcg-target.h @@ -79,8 +79,8 @@ typedef enum { #define TCG_TARGET_HAS_rot_i32 1 #define TCG_TARGET_HAS_ext8s_i32 1 #define TCG_TARGET_HAS_ext16s_i32 1 -#define TCG_TARGET_HAS_bswap16_i32 0 -#define TCG_TARGET_HAS_bswap32_i32 0 +#define TCG_TARGET_HAS_bswap16_i32 1 +#define TCG_TARGET_HAS_bswap32_i32 1 #define TCG_TARGET_HAS_not_i32 1 #define TCG_TARGET_HAS_neg_i32 1 #define TCG_TARGET_HAS_andc_i32 0 @@ -100,8 +100,8 @@ typedef enum { #define TCG_TARGET_HAS_ext8s_i64 1 #define TCG_TARGET_HAS_ext16s_i64 1 #define TCG_TARGET_HAS_ext32s_i64 1 -#define TCG_TARGET_HAS_bswap16_i64 0 -#define TCG_TARGET_HAS_bswap32_i64 0 +#define TCG_TARGET_HAS_bswap16_i64 1 +#define TCG_TARGET_HAS_bswap32_i64 1 #define TCG_TARGET_HAS_bswap64_i64 0 #define TCG_TARGET_HAS_not_i64 1 #define TCG_TARGET_HAS_neg_i64 1 |