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tcg-ppc64: Improve and_i64 with constant

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Use RLDICL and RLDICR.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-02-01 23:58:17 -08:00
parent a9249dff4d
commit 637af30c76
1 changed files with 50 additions and 14 deletions
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64
tcg/ppc64/tcg-target.c
View file

@ -527,7 +527,7 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg ret,
}
}
static inline bool mask_operand(uint32_t c, int *mb, int *me)
static bool mask_operand(uint32_t c, int *mb, int *me)
{
uint32_t lsb, test;
@ -551,6 +551,30 @@ static inline bool mask_operand(uint32_t c, int *mb, int *me)
return true;
}
static bool mask64_operand(uint64_t c, int *mb, int *me)
{
uint64_t lsb;
if (c == 0) {
return false;
}
lsb = c & -c;
/* Accept 1..10..0. */
if (c == -lsb) {
*mb = 0;
*me = clz64(lsb);
return true;
}
/* Accept 0..01..1. */
if (lsb == 1 && (c & (c + 1)) == 0) {
*mb = clz64(c + 1) + 1;
*me = 63;
return true;
}
return false;
}
static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c)
{
int mb, me;
@ -569,6 +593,28 @@ static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c)
}
}
static void tcg_out_andi64(TCGContext *s, TCGReg dst, TCGReg src, uint64_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 (mask64_operand(c, &mb, &me)) {
if (mb == 0) {
tcg_out_rld(s, RLDICR, dst, src, 0, me);
} else {
tcg_out_rld(s, RLDICL, dst, src, 0, mb);
}
} else {
tcg_out_movi(s, TCG_TYPE_I64, 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)
{
@ -1403,20 +1449,10 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args,
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]) {
tcg_out32(s, ANDIS | SAI(args[1], args[0], args[2] >> 16));
} else {
tcg_out_movi (s, (opc == INDEX_op_and_i32
? TCG_TYPE_I32
: TCG_TYPE_I64),
0, args[2]);
tcg_out32 (s, AND | SAB (args[1], args[0], 0));
}
tcg_out_andi64(s, args[0], args[1], args[2]);
} else {
tcg_out32(s, AND | SAB(args[1], args[0], args[2]));
}
else
tcg_out32 (s, AND | SAB (args[1], args[0], args[2]));
break;
case INDEX_op_or_i64:
case INDEX_op_or_i32: