diff options
| author | Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> | 2016-07-26 17:28:27 +0530 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-09-07 09:52:14 +1000 |
| commit | f2442ef93c5f032901baceb52811924b71516266 (patch) | |
| tree | e3b922a5e3f313598943a996e1f9368621c5ba6e /target-ppc | |
| parent | c5b2b9ce126a629b45a11353bf315078c21c6904 (diff) | |
target-ppc: add cmprb instruction
ISA 3.0 Compare Ranged Byte instruction useful for
isupper/islower/isaplha kind of operation.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/translate.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c index ca246ea304..c64ce79446 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -817,6 +817,44 @@ static void gen_cmpli(DisasContext *ctx) } } +/* cmprb - range comparison: isupper, isaplha, islower*/ +static void gen_cmprb(DisasContext *ctx) +{ + TCGv_i32 src1 = tcg_temp_new_i32(); + TCGv_i32 src2 = tcg_temp_new_i32(); + TCGv_i32 src2lo = tcg_temp_new_i32(); + TCGv_i32 src2hi = tcg_temp_new_i32(); + TCGv_i32 crf = cpu_crf[crfD(ctx->opcode)]; + + tcg_gen_trunc_tl_i32(src1, cpu_gpr[rA(ctx->opcode)]); + tcg_gen_trunc_tl_i32(src2, cpu_gpr[rB(ctx->opcode)]); + + tcg_gen_andi_i32(src1, src1, 0xFF); + tcg_gen_ext8u_i32(src2lo, src2); + tcg_gen_shri_i32(src2, src2, 8); + tcg_gen_ext8u_i32(src2hi, src2); + + tcg_gen_setcond_i32(TCG_COND_LEU, src2lo, src2lo, src1); + tcg_gen_setcond_i32(TCG_COND_LEU, src2hi, src1, src2hi); + tcg_gen_and_i32(crf, src2lo, src2hi); + + if (ctx->opcode & 0x00200000) { + tcg_gen_shri_i32(src2, src2, 8); + tcg_gen_ext8u_i32(src2lo, src2); + tcg_gen_shri_i32(src2, src2, 8); + tcg_gen_ext8u_i32(src2hi, src2); + tcg_gen_setcond_i32(TCG_COND_LEU, src2lo, src2lo, src1); + tcg_gen_setcond_i32(TCG_COND_LEU, src2hi, src1, src2hi); + tcg_gen_and_i32(src2lo, src2lo, src2hi); + tcg_gen_or_i32(crf, crf, src2lo); + } + tcg_gen_shli_i32(crf, crf, CRF_GT); + tcg_temp_free_i32(src1); + tcg_temp_free_i32(src2); + tcg_temp_free_i32(src2lo); + tcg_temp_free_i32(src2hi); +} + /* isel (PowerPC 2.03 specification) */ static void gen_isel(DisasContext *ctx) { @@ -9897,6 +9935,7 @@ GEN_HANDLER(cmpi, 0x0B, 0xFF, 0xFF, 0x00400000, PPC_INTEGER), GEN_HANDLER(cmpl, 0x1F, 0x00, 0x01, 0x00400000, PPC_INTEGER), GEN_HANDLER(cmpli, 0x0A, 0xFF, 0xFF, 0x00400000, PPC_INTEGER), GEN_HANDLER_E(cmpb, 0x1F, 0x1C, 0x0F, 0x00000001, PPC_NONE, PPC2_ISA205), +GEN_HANDLER_E(cmprb, 0x1F, 0x00, 0x06, 0x00400001, PPC_NONE, PPC2_ISA300), GEN_HANDLER(isel, 0x1F, 0x0F, 0xFF, 0x00000001, PPC_ISEL), GEN_HANDLER(addi, 0x0E, 0xFF, 0xFF, 0x00000000, PPC_INTEGER), GEN_HANDLER(addic, 0x0C, 0xFF, 0xFF, 0x00000000, PPC_INTEGER), |