aboutsummaryrefslogtreecommitdiff
path: root/target-tilegx
diff options
context:
space:
mode:
authorRichard Henderson <rth@twiddle.net>2015-08-20 21:30:51 -0700
committerRichard Henderson <rth@twiddle.net>2015-09-15 07:45:33 -0700
commit7f41a8d67232bee48ede90ea43f962fdb9e98371 (patch)
tree5a019cc1c9371f4af57566436424429e869512a9 /target-tilegx
parent42fedbca8f5b54324ed89be3484d4a3dc9946387 (diff)
downloadqemu-arm-7f41a8d67232bee48ede90ea43f962fdb9e98371.tar.gz
target-tilegx: Handle most bit manipulation instructions
The crc instructions are omitted from this set. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-tilegx')
-rw-r--r--target-tilegx/helper.c10
-rw-r--r--target-tilegx/helper.h2
-rw-r--r--target-tilegx/translate.c68
3 files changed, 79 insertions, 1 deletions
diff --git a/target-tilegx/helper.c b/target-tilegx/helper.c
index 5b37a8cac3..a01bb8d513 100644
--- a/target-tilegx/helper.c
+++ b/target-tilegx/helper.c
@@ -40,6 +40,16 @@ uint64_t helper_cnttz(uint64_t arg)
return ctz64(arg);
}
+uint64_t helper_pcnt(uint64_t arg)
+{
+ return ctpop64(arg);
+}
+
+uint64_t helper_revbits(uint64_t arg)
+{
+ return revbit64(arg);
+}
+
/*
* Functional Description
* uint64_t a = rf[SrcA];
diff --git a/target-tilegx/helper.h b/target-tilegx/helper.h
index fd5517ede4..644d313e79 100644
--- a/target-tilegx/helper.h
+++ b/target-tilegx/helper.h
@@ -1,4 +1,6 @@
DEF_HELPER_2(exception, noreturn, env, i32)
DEF_HELPER_FLAGS_1(cntlz, TCG_CALL_NO_RWG_SE, i64, i64)
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)
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 6b5de5530c..e581fc5eb4 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -177,6 +177,43 @@ static void gen_saturate_op(TCGv tdest, TCGv tsrca, TCGv tsrcb,
tcg_temp_free(t0);
}
+/* Shift the 128-bit value TSRCA:TSRCD right by the number of bytes
+ specified by the bottom 3 bits of TSRCB, and set TDEST to the
+ low 64 bits of the resulting value. */
+static void gen_dblalign(TCGv tdest, TCGv tsrcd, TCGv tsrca, TCGv tsrcb)
+{
+ TCGv t0 = tcg_temp_new();
+
+ tcg_gen_andi_tl(t0, tsrcb, 7);
+ tcg_gen_shli_tl(t0, t0, 3);
+ tcg_gen_shr_tl(tdest, tsrcd, t0);
+
+ /* We want to do "t0 = tsrca << (64 - t0)". Two's complement
+ arithmetic on a 6-bit field tells us that 64 - t0 is equal
+ to (t0 ^ 63) + 1. So we can do the shift in two parts,
+ neither of which will be an invalid shift by 64. */
+ tcg_gen_xori_tl(t0, t0, 63);
+ tcg_gen_shl_tl(t0, tsrca, t0);
+ tcg_gen_shli_tl(t0, t0, 1);
+ tcg_gen_or_tl(tdest, tdest, t0);
+
+ tcg_temp_free(t0);
+}
+
+/* Similarly, except that the 128-bit value is TSRCA:TSRCB, and the
+ right shift is an immediate. */
+static void gen_dblaligni(TCGv tdest, TCGv tsrca, TCGv tsrcb, int shr)
+{
+ TCGv t0 = tcg_temp_new();
+
+ tcg_gen_shri_tl(t0, tsrcb, shr);
+ tcg_gen_shli_tl(tdest, tsrca, 64 - shr);
+ tcg_gen_or_tl(tdest, tdest, t0);
+
+ tcg_temp_free(t0);
+}
+
+
static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
unsigned dest, unsigned srca)
{
@@ -210,8 +247,14 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
switch (opext) {
case OE_RR_X0(CNTLZ):
case OE_RR_Y0(CNTLZ):
+ gen_helper_cntlz(tdest, tsrca);
+ mnemonic = "cntlz";
+ break;
case OE_RR_X0(CNTTZ):
case OE_RR_Y0(CNTTZ):
+ gen_helper_cnttz(tdest, tsrca);
+ mnemonic = "cnttz";
+ break;
case OE_RR_X1(DRAIN):
case OE_RR_X1(DTLBPR):
case OE_RR_X1(FINV):
@@ -251,11 +294,17 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
case OE_RR_Y1(LNK):
case OE_RR_X1(MF):
case OE_RR_X1(NAP):
+ return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
case OE_RR_X0(PCNT):
case OE_RR_Y0(PCNT):
+ gen_helper_pcnt(tdest, tsrca);
+ mnemonic = "pcnt";
+ break;
case OE_RR_X0(REVBITS):
case OE_RR_Y0(REVBITS):
- return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
+ gen_helper_revbits(tdest, tsrca);
+ mnemonic = "revbits";
+ break;
case OE_RR_X0(REVBYTES):
case OE_RR_Y0(REVBYTES):
tcg_gen_bswap64_tl(tdest, tsrca);
@@ -358,13 +407,26 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
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(DBLALIGN2, 0, X0):
case OE_RRR(DBLALIGN2, 0, X1):
+ gen_dblaligni(tdest, tsrca, tsrcb, 16);
+ mnemonic = "dblalign2";
+ break;
case OE_RRR(DBLALIGN4, 0, X0):
case OE_RRR(DBLALIGN4, 0, X1):
+ gen_dblaligni(tdest, tsrca, tsrcb, 32);
+ mnemonic = "dblalign4";
+ break;
case OE_RRR(DBLALIGN6, 0, X0):
case OE_RRR(DBLALIGN6, 0, X1):
+ gen_dblaligni(tdest, tsrca, tsrcb, 48);
+ mnemonic = "dblalign6";
+ break;
case OE_RRR(DBLALIGN, 0, X0):
+ gen_dblalign(tdest, load_gr(dc, dest), tsrca, tsrcb);
+ mnemonic = "dblalign";
+ break;
case OE_RRR(EXCH4, 0, X1):
case OE_RRR(EXCH, 0, X1):
case OE_RRR(FDOUBLE_ADDSUB, 0, X0):
@@ -516,7 +578,11 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
case OE_RRR(SHRU, 0, X1):
case OE_RRR(SHRU, 6, Y0):
case OE_RRR(SHRU, 6, Y1):
+ return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
case OE_RRR(SHUFFLEBYTES, 0, X0):
+ gen_helper_shufflebytes(tdest, load_gr(dc, dest), tsrca, tsrca);
+ mnemonic = "shufflebytes";
+ break;
case OE_RRR(ST1, 0, X1):
case OE_RRR(ST2, 0, X1):
case OE_RRR(ST4, 0, X1):