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Fix bit fitting checks

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4460 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-05-15 17:30:17 +00:00
parent b8b6a50b55
commit f02ca5cbea
1 changed files with 15 additions and 11 deletions
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26
tcg/sparc/tcg-target.c
View file

@ -134,7 +134,12 @@ static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
return 0;
}
#define ABS(x) ((x) < 0? -(x) : (x))
static inline int check_fit(tcg_target_long val, unsigned int bits)
{
return ((val << ((sizeof(tcg_target_long) * 8 - bits))
>> (sizeof(tcg_target_long) * 8 - bits)) == val);
}
/* test if a constant matches the constraint */
static inline int tcg_target_const_match(tcg_target_long val,
const TCGArgConstraint *arg_ct)
@ -144,9 +149,9 @@ static inline int tcg_target_const_match(tcg_target_long val,
ct = arg_ct->ct;
if (ct & TCG_CT_CONST)
return 1;
else if ((ct & TCG_CT_CONST_S11) && ABS(val) == (ABS(val) & 0x3ff))
else if ((ct & TCG_CT_CONST_S11) && check_fit(val, 11))
return 1;
else if ((ct & TCG_CT_CONST_S13) && ABS(val) == (ABS(val) & 0xfff))
else if ((ct & TCG_CT_CONST_S13) && check_fit(val, 13))
return 1;
else
return 0;
@ -217,10 +222,10 @@ static inline void tcg_out_movi(TCGContext *s, TCGType type,
int ret, tcg_target_long arg)
{
#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)
if (arg != (arg & 0xffffffff))
if (!check_fit(arg, 32))
fprintf(stderr, "unimplemented %s with constant %ld\n", __func__, arg);
#endif
if (arg == (arg & 0xfff))
if (check_fit(arg, 13))
tcg_out32(s, ARITH_OR | INSN_RD(ret) | INSN_RS1(TCG_REG_G0) |
INSN_IMM13(arg));
else {
@ -243,9 +248,9 @@ static inline void tcg_out_ld_ptr(TCGContext *s, int ret,
tcg_target_long arg)
{
#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)
if (arg != (arg & 0xffffffff))
if (!check_fit(arg, 32))
fprintf(stderr, "unimplemented %s with offset %ld\n", __func__, arg);
if (arg != (arg & 0xfff))
if (!check_fit(arg, 13))
tcg_out32(s, SETHI | INSN_RD(ret) | (((uint32_t)arg & 0xfffffc00) >> 10));
tcg_out32(s, LDX | INSN_RD(ret) | INSN_RS1(ret) |
INSN_IMM13(arg & 0x3ff));
@ -256,7 +261,7 @@ static inline void tcg_out_ld_ptr(TCGContext *s, int ret,
static inline void tcg_out_ldst(TCGContext *s, int ret, int addr, int offset, int op)
{
if (offset == (offset & 0xfff))
if (check_fit(offset, 13))
tcg_out32(s, op | INSN_RD(ret) | INSN_RS1(addr) |
INSN_IMM13(offset));
else
@ -306,7 +311,7 @@ static inline void tcg_out_sety(TCGContext *s, tcg_target_long val)
static inline void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
{
if (val != 0) {
if (val == (val & 0xfff))
if (check_fit(val, 13))
tcg_out_arithi(s, reg, reg, val, ARITH_ADD);
else
fprintf(stderr, "unimplemented addi %ld\n", (long)val);
@ -344,8 +349,7 @@ static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
case INDEX_op_goto_tb:
if (s->tb_jmp_offset) {
/* direct jump method */
if (ABS(args[0] - (unsigned long)s->code_ptr) ==
(ABS(args[0] - (unsigned long)s->code_ptr) & 0x1fffff)) {
if (check_fit(args[0] - (unsigned long)s->code_ptr, 26)) {
tcg_out32(s, BA |
INSN_OFF22(args[0] - (unsigned long)s->code_ptr));
} else {