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target-tilegx: Implement crc instructions 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-09-23 10:12:16 -07:00
parent 38c949ffe7
commit ba1fc78f65
3 changed files with 29 additions and 2 deletions
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19
target-tilegx/helper.c
View File

@ -21,6 +21,7 @@
#include "cpu.h"
#include "qemu-common.h"
#include "exec/helper-proto.h"
#include <zlib.h> /* For crc32 */
void helper_exception(CPUTLGState *env, uint32_t excp)
{
@ -78,3 +79,21 @@ uint64_t helper_shufflebytes(uint64_t dest, uint64_t srca, uint64_t srcb)
return vdst;
}
uint64_t helper_crc32_8(uint64_t accum, uint64_t input)
{
uint8_t buf = input;
/* zlib crc32 converts the accumulator and output to one's complement. */
return crc32(accum ^ 0xffffffff, &buf, 1) ^ 0xffffffff;
}
uint64_t helper_crc32_32(uint64_t accum, uint64_t input)
{
uint8_t buf[4];
stl_le_p(buf, input);
/* zlib crc32 converts the accumulator and output to one's complement. */
return crc32(accum ^ 0xffffffff, buf, 4) ^ 0xffffffff;
}

2
target-tilegx/helper.h
View File

@ -4,6 +4,8 @@ DEF_HELPER_FLAGS_1(cnttz, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_1(pcnt, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_1(revbits, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_3(shufflebytes, TCG_CALL_NO_RWG_SE, i64, i64, i64, i64)
DEF_HELPER_FLAGS_2(crc32_8, TCG_CALL_NO_RWG_SE, i64, i64, i64)
DEF_HELPER_FLAGS_2(crc32_32, TCG_CALL_NO_RWG_SE, i64, i64, i64)
DEF_HELPER_FLAGS_2(v1multu, TCG_CALL_NO_RWG_SE, i64, i64, i64)
DEF_HELPER_FLAGS_2(v1shl, TCG_CALL_NO_RWG_SE, i64, i64, i64)

10
target-tilegx/translate.c
View File

@ -750,9 +750,15 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
case OE_RRR(CMULHR, 0, X0):
case OE_RRR(CMULH, 0, X0):
case OE_RRR(CMUL, 0, X0):
case OE_RRR(CRC32_32, 0, X0):
case OE_RRR(CRC32_8, 0, X0):
return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
case OE_RRR(CRC32_32, 0, X0):
gen_helper_crc32_32(tdest, tsrca, tsrcb);
mnemonic = "crc32_32";
break;
case OE_RRR(CRC32_8, 0, X0):
gen_helper_crc32_8(tdest, tsrca, tsrcb);
mnemonic = "crc32_8";
break;
case OE_RRR(DBLALIGN2, 0, X0):
case OE_RRR(DBLALIGN2, 0, X1):
gen_dblaligni(tdest, tsrca, tsrcb, 16);