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PPC: Clean up masked shift/rotate target settings.

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This commit is contained in:
Mike Pall 2010-08-29 12:52:20 +02:00
parent 9c16a9f705
commit 844e40d700
3 changed files with 14 additions and 17 deletions
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21
src/lj_arch.h
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@ -52,7 +52,8 @@
#define LJ_TARGET_X86 1
#define LJ_TARGET_X86ORX64 1
#define LJ_PAGESIZE 4096
#define LJ_TARGET_MASKEDSHIFT 1
#define LJ_TARGET_MASKSHIFT 1
#define LJ_TARGET_MASKROT 1
#elif LUAJIT_TARGET == LUAJIT_ARCH_X64
@ -62,7 +63,8 @@
#define LJ_TARGET_X64 1
#define LJ_TARGET_X86ORX64 1
#define LJ_PAGESIZE 4096
#define LJ_TARGET_MASKEDSHIFT 1
#define LJ_TARGET_MASKSHIFT 1
#define LJ_TARGET_MASKROT 1
#elif LUAJIT_TARGET == LUAJIT_ARCH_PPC
@ -76,7 +78,8 @@
#define LJ_TARGET_PPC 1
#define LJ_TARGET_PPCSPE 1
#define LJ_PAGESIZE 4096
#define LJ_TARGET_MASKEDSHIFT 1
#define LJ_TARGET_MASKSHIFT 0
#define LJ_TARGET_MASKROT 1
#define LJ_ARCH_NOJIT 1
#else
@ -92,6 +95,9 @@
#if defined(_LITTLE_ENDIAN)
#error "No support for little-endian PowerPC"
#endif
#if defined(_LP64)
#error "No support for PowerPC 64 bit mode"
#endif
#endif
#endif
@ -113,16 +119,9 @@
#if LJ_ARCH_BITS == 32
#define LJ_32 1
#define LJ_64 0
#elif LJ_ARCH_BITS == 64
#else
#define LJ_32 0
#define LJ_64 1
#else
#error "Bad LJ_ARCH_BITS setting"
#endif
/* Whether target CPU masks the shift count by the operand length or not. */
#ifndef LJ_TARGET_MASKEDSHIFT
#define LJ_TARGET_MASKEDSHIFT 0
#endif
#endif

5
src/lj_opt_fold.c
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@ -811,17 +811,16 @@ LJFOLD(BROL any BAND)
LJFOLD(BROR any BAND)
LJFOLDF(simplify_shift_andk)
{
#if LJ_TARGET_MASKEDSHIFT
IRIns *irk = IR(fright->op2);
PHIBARRIER(fright);
if (irk->o == IR_KINT) { /* i o (j & 31) ==> i o j */
if ((fins->o < IR_BROL ? LJ_TARGET_MASKSHIFT : LJ_TARGET_MASKROT) &&
irk->o == IR_KINT) { /* i o (j & 31) ==> i o j */
int32_t k = irk->i & 31;
if (k == 31) {
fins->op2 = fright->op1;
return RETRYFOLD;
}
}
#endif
return NEXTFOLD;
}

5
src/lj_record.c
View File

@ -1552,10 +1552,9 @@ static void LJ_FASTCALL recff_bit_shift(jit_State *J, RecordFFData *rd)
{
TRef tr = lj_ir_tobit(J, J->base[0]);
TRef tsh = lj_ir_tobit(J, J->base[1]);
#if !LJ_TARGET_MASKEDSHIFT
if (!tref_isk(tsh))
if (!(rd->data < IR_BROL ? LJ_TARGET_MASKSHIFT : LJ_TARGET_MASKROT) &&
!tref_isk(tsh))
tsh = emitir(IRTI(IR_BAND), tsh, lj_ir_kint(J, 31));
#endif
J->base[0] = emitir(IRTI(rd->data), tr, tsh);
}