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tcg/ppc: Implment bswap16/32

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Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
malc 2010-04-06 02:53:11 +04:00
parent 61d3cf93e2
commit a884dcb804
2 changed files with 77 additions and 2 deletions
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75
tcg/ppc/tcg-target.c
View file

@ -328,6 +328,7 @@ static int tcg_target_const_match(tcg_target_long val,
#define LWZU OPCD(33)
#define STWU OPCD(37)
#define RLWIMI OPCD(20)
#define RLWINM OPCD(21)
#define RLWNM OPCD(23)
@ -1715,6 +1716,77 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
tcg_out_setcond2 (s, args, const_args);
break;
case INDEX_op_bswap16_i32:
/* Stolen from gcc's builtin_bswap16 */
/* a1 = abcd */
/* r0 = (a1 << 8) & 0xff00 # 00d0 */
tcg_out32 (s, RLWINM
| RA (0)
| RS (args[1])
| SH (8)
| MB (16)
| ME (23)
);
/* a0 = rotate_left (a1, 24) & 0xff # 000c */
tcg_out32 (s, RLWINM
| RA (args[0])
| RS (args[1])
| SH (24)
| MB (24)
| ME (31)
);
/* a0 = a0 | r0 # 00dc */
tcg_out32 (s, OR | SAB (0, args[0], args[0]));
break;
case INDEX_op_bswap32_i32:
/* Stolen from gcc's builtin_bswap32 */
{
int a0 = args[0];
/* a1 = args[1] # abcd */
if (a0 == args[1]) {
a0 = 0;
}
/* a0 = rotate_left (a1, 8) # bcda */
tcg_out32 (s, RLWINM
| RA (a0)
| RS (args[1])
| SH (8)
| MB (0)
| ME (31)
);
/* a0 = (a0 & ~0xff000000) | ((a1 << 24) & 0xff000000) # dcda */
tcg_out32 (s, RLWIMI
| RA (a0)
| RS (args[1])
| SH (24)
| MB (0)
| ME (7)
);
/* a0 = (a0 & ~0x0000ff00) | ((a1 << 24) & 0x0000ff00) # dcba */
tcg_out32 (s, RLWIMI
| RA (a0)
| RS (args[1])
| SH (24)
| MB (16)
| ME (23)
);
if (!a0) {
tcg_out_mov (s, args[0], a0);
}
}
break;
default:
tcg_dump_ops (s, stderr);
tcg_abort ();
@ -1776,6 +1848,9 @@ static const TCGTargetOpDef ppc_op_defs[] = {
{ INDEX_op_setcond_i32, { "r", "r", "ri" } },
{ INDEX_op_setcond2_i32, { "r", "r", "r", "ri", "ri" } },
{ INDEX_op_bswap16_i32, { "r", "r" } },
{ INDEX_op_bswap32_i32, { "r", "r" } },
#if TARGET_LONG_BITS == 32
{ INDEX_op_qemu_ld8u, { "r", "L" } },
{ INDEX_op_qemu_ld8s, { "r", "L" } },

4
tcg/ppc/tcg-target.h
View file

@ -83,8 +83,8 @@ enum {
#define TCG_TARGET_HAS_ext16s_i32
#define TCG_TARGET_HAS_ext8u_i32
#define TCG_TARGET_HAS_ext16u_i32
/* #define TCG_TARGET_HAS_bswap16_i32 */
/* #define TCG_TARGET_HAS_bswap32_i32 */
#define TCG_TARGET_HAS_bswap16_i32
#define TCG_TARGET_HAS_bswap32_i32
#define TCG_TARGET_HAS_not_i32
#define TCG_TARGET_HAS_neg_i32
#define TCG_TARGET_HAS_andc_i32