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8073583: C2 support for CRC32C on SPARC

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Reviewed-by: jrose, kvn
This commit is contained in:
James Cheng 2015-06-29 00:10:01 -07:00 • committed by Vladimir Kozlov
parent 4a826139e3
commit e2533553f6
21 changed files with 746 additions and 19 deletions
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56
hotspot/src/cpu/sparc/vm/macroAssembler_sparc.cpp
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@ -956,6 +956,7 @@ void MacroAssembler::set64(jlong value, Register d, Register tmp) {
int hi = (int)(value >> 32);
int lo = (int)(value & ~0);
int bits_33to2 = (int)((value >> 2) & ~0);
// (Matcher::isSimpleConstant64 knows about the following optimizations.)
if (Assembler::is_simm13(lo) && value == lo) {
or3(G0, lo, d);
@ -964,6 +965,12 @@ void MacroAssembler::set64(jlong value, Register d, Register tmp) {
if (low10(lo) != 0)
or3(d, low10(lo), d);
}
else if ((hi >> 2) == 0) {
Assembler::sethi(bits_33to2, d); // hardware version zero-extends to upper 32
sllx(d, 2, d);
if (low12(lo) != 0)
or3(d, low12(lo), d);
}
else if (hi == -1) {
Assembler::sethi(~lo, d); // hardware version zero-extends to upper 32
xor3(d, low10(lo) ^ ~low10(~0), d);
@ -4351,3 +4358,52 @@ void MacroAssembler::bis_zeroing(Register to, Register count, Register temp, Lab
cmp_and_brx_short(to, end, Assembler::lessUnsigned, Assembler::pt, small_loop);
nop(); // Separate short branches
}
/**
* Update CRC-32[C] with a byte value according to constants in table
*
* @param [in,out]crc Register containing the crc.
* @param [in]val Register containing the byte to fold into the CRC.
* @param [in]table Register containing the table of crc constants.
*
* uint32_t crc;
* val = crc_table[(val ^ crc) & 0xFF];
* crc = val ^ (crc >> 8);
*/
void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) {
xor3(val, crc, val);
and3(val, 0xFF, val);
sllx(val, 2, val);
lduw(table, val, val);
srlx(crc, 8, crc);
xor3(val, crc, crc);
}
// Reverse byte order of lower 32 bits, assuming upper 32 bits all zeros
void MacroAssembler::reverse_bytes_32(Register src, Register dst, Register tmp) {
srlx(src, 24, dst);
sllx(src, 32+8, tmp);
srlx(tmp, 32+24, tmp);
sllx(tmp, 8, tmp);
or3(dst, tmp, dst);
sllx(src, 32+16, tmp);
srlx(tmp, 32+24, tmp);
sllx(tmp, 16, tmp);
or3(dst, tmp, dst);
sllx(src, 32+24, tmp);
srlx(tmp, 32, tmp);
or3(dst, tmp, dst);
}
void MacroAssembler::movitof_revbytes(Register src, FloatRegister dst, Register tmp1, Register tmp2) {
reverse_bytes_32(src, tmp1, tmp2);
movxtod(tmp1, dst);
}
void MacroAssembler::movftoi_revbytes(FloatRegister src, Register dst, Register tmp1, Register tmp2) {
movdtox(src, tmp1);
reverse_bytes_32(tmp1, dst, tmp2);
}