--- a/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp Thu Jul 21 08:38:25 2011 -0700
+++ b/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp Thu Jul 21 11:25:07 2011 -0700
@@ -761,7 +761,7 @@
mwtos_opf = 0x119
};
- enum RCondition { rc_z = 1, rc_lez = 2, rc_lz = 3, rc_nz = 5, rc_gz = 6, rc_gez = 7 };
+ enum RCondition { rc_z = 1, rc_lez = 2, rc_lz = 3, rc_nz = 5, rc_gz = 6, rc_gez = 7, rc_last = rc_gez };
enum Condition {
// for FBfcc & FBPfcc instruction
@@ -866,9 +866,18 @@
return is_simm(d, nbits + 2);
}
+ address target_distance(Label& L) {
+ // Assembler::target(L) should be called only when
+ // a branch instruction is emitted since non-bound
+ // labels record current pc() as a branch address.
+ if (L.is_bound()) return target(L);
+ // Return current address for non-bound labels.
+ return pc();
+ }
+
// test if label is in simm16 range in words (wdisp16).
bool is_in_wdisp16_range(Label& L) {
- return is_in_wdisp_range(target(L), pc(), 16);
+ return is_in_wdisp_range(target_distance(L), pc(), 16);
}
// test if the distance between two addresses fits in simm30 range in words
static bool is_in_wdisp30_range(address a, address b) {
@@ -975,6 +984,20 @@
static int sx( int i) { return u_field(i, 12, 12); } // shift x=1 means 64-bit
static int opf( int x) { return u_field(x, 13, 5); }
+ static bool is_cbcond( int x ) {
+ return (VM_Version::has_cbcond() && (inv_cond(x) > rc_last) &&
+ inv_op(x) == branch_op && inv_op2(x) == bpr_op2);
+ }
+ static bool is_cxb( int x ) {
+ assert(is_cbcond(x), "wrong instruction");
+ return (x & (1<<21)) != 0;
+ }
+ static int cond_cbcond( int x) { return u_field((((x & 8)<<1) + 8 + (x & 7)), 29, 25); }
+ static int inv_cond_cbcond(int x) {
+ assert(is_cbcond(x), "wrong instruction");
+ return inv_u_field(x, 27, 25) | (inv_u_field(x, 29, 29)<<3);
+ }
+
static int opf_cc( CC c, bool useFloat ) { return u_field((useFloat ? 0 : 4) + c, 13, 11); }
static int mov_cc( CC c, bool useFloat ) { return u_field(useFloat ? 0 : 1, 18, 18) | u_field(c, 12, 11); }
@@ -1026,6 +1049,26 @@
return r;
}
+ // compute inverse of wdisp10
+ static intptr_t inv_wdisp10(int x, intptr_t pos) {
+ assert(is_cbcond(x), "wrong instruction");
+ int lo = inv_u_field(x, 12, 5);
+ int hi = (x >> 19) & 3;
+ if (hi >= 2) hi |= ~1;
+ return (((hi << 8) | lo) << 2) + pos;
+ }
+
+ // word offset for cbcond, 8 bits at [B12,B5], 2 bits at [B20,B19]
+ static int wdisp10(intptr_t x, intptr_t off) {
+ assert(VM_Version::has_cbcond(), "This CPU does not have CBCOND instruction");
+ intptr_t xx = x - off;
+ assert_signed_word_disp_range(xx, 10);
+ int r = ( ( (xx >> 2 ) & ((1 << 8) - 1) ) << 5 )
+ | ( ( (xx >> (2+8)) & 3 ) << 19 );
+ // Have to fake cbcond instruction to pass assert in inv_wdisp10()
+ assert(inv_wdisp10((r | op(branch_op) | cond_cbcond(rc_last+1) | op2(bpr_op2)), off) == x, "inverse is not inverse");
+ return r;
+ }
// word displacement in low-order nbits bits
@@ -1138,6 +1181,24 @@
#endif
}
+ // cbcond instruction should not be generated one after an other
+ bool cbcond_before() {
+ if (offset() == 0) return false; // it is first instruction
+ int x = *(int*)(intptr_t(pc()) - 4); // previous instruction
+ return is_cbcond(x);
+ }
+
+ void no_cbcond_before() {
+ assert(offset() == 0 || !cbcond_before(), "cbcond should not follow an other cbcond");
+ }
+
+ bool use_cbcond(Label& L) {
+ if (!UseCBCond || cbcond_before()) return false;
+ intptr_t x = intptr_t(target_distance(L)) - intptr_t(pc());
+ assert( (x & 3) == 0, "not word aligned");
+ return is_simm(x, 12);
+ }
+
public:
// Tells assembler you know that next instruction is delayed
Assembler* delayed() {
@@ -1181,10 +1242,11 @@
void addccc( Register s1, Register s2, Register d ) { emit_long( op(arith_op) | rd(d) | op3(addc_op3 | cc_bit_op3) | rs1(s1) | rs2(s2) ); }
void addccc( Register s1, int simm13a, Register d ) { emit_long( op(arith_op) | rd(d) | op3(addc_op3 | cc_bit_op3) | rs1(s1) | immed(true) | simm(simm13a, 13) ); }
+
// pp 136
- inline void bpr( RCondition c, bool a, Predict p, Register s1, address d, relocInfo::relocType rt = relocInfo::none );
- inline void bpr( RCondition c, bool a, Predict p, Register s1, Label& L);
+ inline void bpr(RCondition c, bool a, Predict p, Register s1, address d, relocInfo::relocType rt = relocInfo::none);
+ inline void bpr(RCondition c, bool a, Predict p, Register s1, Label& L);
protected: // use MacroAssembler::br instead
@@ -1198,8 +1260,6 @@
inline void fbp( Condition c, bool a, CC cc, Predict p, address d, relocInfo::relocType rt = relocInfo::none );
inline void fbp( Condition c, bool a, CC cc, Predict p, Label& L );
- public:
-
// pp 144
inline void br( Condition c, bool a, address d, relocInfo::relocType rt = relocInfo::none );
@@ -1215,11 +1275,17 @@
inline void cb( Condition c, bool a, address d, relocInfo::relocType rt = relocInfo::none );
inline void cb( Condition c, bool a, Label& L );
+ // compare and branch
+ inline void cbcond(Condition c, CC cc, Register s1, Register s2, Label& L);
+ inline void cbcond(Condition c, CC cc, Register s1, int simm5, Label& L);
+
// pp 149
inline void call( address d, relocInfo::relocType rt = relocInfo::runtime_call_type );
inline void call( Label& L, relocInfo::relocType rt = relocInfo::runtime_call_type );
+ public:
+
// pp 150
// These instructions compare the contents of s2 with the contents of
@@ -1862,8 +1928,8 @@
inline void fb( Condition c, bool a, Predict p, address d, relocInfo::relocType rt = relocInfo::none );
inline void fb( Condition c, bool a, Predict p, Label& L );
- // compares register with zero and branches (V9 and V8 instructions)
- void br_zero( Condition c, bool a, Predict p, Register s1, Label& L);
+ // compares register with zero (32 bit) and branches (V9 and V8 instructions)
+ void cmp_zero_and_br( Condition c, Register s1, Label& L, bool a = false, Predict p = pn );
// Compares a pointer register with zero and branches on (not)null.
// Does a test & branch on 32-bit systems and a register-branch on 64-bit.
void br_null ( Register s1, bool a, Predict p, Label& L );
@@ -1875,6 +1941,26 @@
void br_on_reg_cond( RCondition c, bool a, Predict p, Register s1, address d, relocInfo::relocType rt = relocInfo::none );
void br_on_reg_cond( RCondition c, bool a, Predict p, Register s1, Label& L);
+ //
+ // Compare registers and branch with nop in delay slot or cbcond without delay slot.
+ //
+ // ATTENTION: use these instructions with caution because cbcond instruction
+ // has very short distance: 512 instructions (2Kbyte).
+
+ // Compare integer (32 bit) values (icc only).
+ void cmp_and_br_short(Register s1, Register s2, Condition c, Predict p, Label& L);
+ void cmp_and_br_short(Register s1, int simm13a, Condition c, Predict p, Label& L);
+ // Platform depending version for pointer compare (icc on !LP64 and xcc on LP64).
+ void cmp_and_brx_short(Register s1, Register s2, Condition c, Predict p, Label& L);
+ void cmp_and_brx_short(Register s1, int simm13a, Condition c, Predict p, Label& L);
+
+ // Short branch version for compares a pointer pwith zero.
+ void br_null_short ( Register s1, Predict p, Label& L );
+ void br_notnull_short( Register s1, Predict p, Label& L );
+
+ // unconditional short branch
+ void ba_short(Label& L);
+
inline void bp( Condition c, bool a, CC cc, Predict p, address d, relocInfo::relocType rt = relocInfo::none );
inline void bp( Condition c, bool a, CC cc, Predict p, Label& L );
@@ -1882,8 +1968,8 @@
inline void brx( Condition c, bool a, Predict p, address d, relocInfo::relocType rt = relocInfo::none );
inline void brx( Condition c, bool a, Predict p, Label& L );
- // unconditional short branch
- inline void ba( bool a, Label& L );
+ // unconditional branch
+ inline void ba( Label& L );
// Branch that tests fp condition codes
inline void fbp( Condition c, bool a, CC cc, Predict p, address d, relocInfo::relocType rt = relocInfo::none );
@@ -2167,7 +2253,6 @@
inline void stbool(Register d, const Address& a) { stb(d, a); }
inline void ldbool(const Address& a, Register d) { ldsb(a, d); }
- inline void tstbool( Register s ) { tst(s); }
inline void movbool( bool boolconst, Register d) { mov( (int) boolconst, d); }
// klass oop manipulations if compressed
@@ -2469,8 +2554,7 @@
Label* L_success,
Label* L_failure,
Label* L_slow_path,
- RegisterOrConstant super_check_offset = RegisterOrConstant(-1),
- Register instanceof_hack = noreg);
+ RegisterOrConstant super_check_offset = RegisterOrConstant(-1));
// The rest of the type check; must be wired to a corresponding fast path.
// It does not repeat the fast path logic, so don't use it standalone.