diff options
Diffstat (limited to 'target-tilegx')
| -rw-r--r-- | target-tilegx/translate.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c index 8b7c7199ce..9b0d81942c 100644 --- a/target-tilegx/translate.c +++ b/target-tilegx/translate.c @@ -93,6 +93,8 @@ typedef struct { #define OE_IM(E,XY) OE(IMM8_OPCODE_##XY, E##_IMM8_OPCODE_##XY, XY) #define OE_SH(E,XY) OE(SHIFT_OPCODE_##XY, E##_SHIFT_OPCODE_##XY, XY) +#define V1_IMM(X) (((X) & 0xff) * 0x0101010101010101ull) + static void gen_exception(DisasContext *dc, TileExcp num) { @@ -245,6 +247,41 @@ static void gen_mul_half(TCGv tdest, TCGv tsrca, TCGv tsrcb, tcg_temp_free(t); } +/* Equality comparison with zero can be done quickly and efficiently. */ +static void gen_v1cmpeq0(TCGv v) +{ + TCGv m = tcg_const_tl(V1_IMM(0x7f)); + TCGv c = tcg_temp_new(); + + /* ~(((v & m) + m) | m | v). Sets the msb for each byte == 0. */ + tcg_gen_and_tl(c, v, m); + tcg_gen_add_tl(c, c, m); + tcg_gen_or_tl(c, c, m); + tcg_gen_nor_tl(c, c, v); + tcg_temp_free(m); + + /* Shift the msb down to form the lsb boolean result. */ + tcg_gen_shri_tl(v, c, 7); + tcg_temp_free(c); +} + +static void gen_v1cmpne0(TCGv v) +{ + TCGv m = tcg_const_tl(V1_IMM(0x7f)); + TCGv c = tcg_temp_new(); + + /* (((v & m) + m) | v) & ~m. Sets the msb for each byte != 0. */ + tcg_gen_and_tl(c, v, m); + tcg_gen_add_tl(c, c, m); + tcg_gen_or_tl(c, c, v); + tcg_gen_andc_tl(c, c, m); + tcg_temp_free(m); + + /* Shift the msb down to form the lsb boolean result. */ + tcg_gen_shri_tl(v, c, 7); + tcg_temp_free(c); +} + static TileExcp gen_st_opcode(DisasContext *dc, unsigned dest, unsigned srca, unsigned srcb, TCGMemOp memop, const char *name) { @@ -915,8 +952,13 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext, case OE_RRR(V1ADD, 0, X1): case OE_RRR(V1ADIFFU, 0, X0): case OE_RRR(V1AVGU, 0, X0): + return TILEGX_EXCP_OPCODE_UNIMPLEMENTED; case OE_RRR(V1CMPEQ, 0, X0): case OE_RRR(V1CMPEQ, 0, X1): + tcg_gen_xor_tl(tdest, tsrca, tsrcb); + gen_v1cmpeq0(tdest); + mnemonic = "v1cmpeq"; + break; case OE_RRR(V1CMPLES, 0, X0): case OE_RRR(V1CMPLES, 0, X1): case OE_RRR(V1CMPLEU, 0, X0): @@ -925,8 +967,13 @@ static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext, case OE_RRR(V1CMPLTS, 0, X1): case OE_RRR(V1CMPLTU, 0, X0): case OE_RRR(V1CMPLTU, 0, X1): + return TILEGX_EXCP_OPCODE_UNIMPLEMENTED; case OE_RRR(V1CMPNE, 0, X0): case OE_RRR(V1CMPNE, 0, X1): + tcg_gen_xor_tl(tdest, tsrca, tsrcb); + gen_v1cmpne0(tdest); + mnemonic = "v1cmpne"; + break; case OE_RRR(V1DDOTPUA, 0, X0): case OE_RRR(V1DDOTPUSA, 0, X0): case OE_RRR(V1DDOTPUS, 0, X0): @@ -1187,6 +1234,10 @@ static TileExcp gen_rri_opcode(DisasContext *dc, unsigned opext, case OE_IM(V1ADDI, X1): case OE_IM(V1CMPEQI, X0): case OE_IM(V1CMPEQI, X1): + tcg_gen_xori_tl(tdest, tsrca, V1_IMM(imm)); + gen_v1cmpeq0(tdest); + mnemonic = "v1cmpeqi"; + break; case OE_IM(V1CMPLTSI, X0): case OE_IM(V1CMPLTSI, X1): case OE_IM(V1CMPLTUI, X0): |