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| author | Jim Wilson <jim.wilson@linaro.org> | 2017-02-25 20:04:09 -0800 |
|---|---|---|
| committer | Jim Wilson <jim.wilson@linaro.org> | 2017-02-25 20:04:09 -0800 |
| commit | ac189e7bf8865d61b4f5e89a530476f9e4c5c70b (patch) | |
| tree | 6259f1c8e9c66da0df22cb004046855101fa5111 /sim/aarch64 | |
| parent | a8a0c9384831bc03b43e60b8d7896a403807335a (diff) | |
| download | gdb-ac189e7bf8865d61b4f5e89a530476f9e4c5c70b.zip gdb-ac189e7bf8865d61b4f5e89a530476f9e4c5c70b.tar.gz gdb-ac189e7bf8865d61b4f5e89a530476f9e4c5c70b.tar.bz2 | |
Add missing cnt (popcount) instruction support.
sim/aarch64/
* simulator.c (popcount): New.
(do_vec_CNT): New.
(do_vec_op1): Add do_vec_CNT call.
sim/testsuite/sim/aarch64/
* cnt.s: New.
Diffstat (limited to 'sim/aarch64')
| -rw-r--r-- | sim/aarch64/ChangeLog | 6 | ||||
| -rw-r--r-- | sim/aarch64/simulator.c | 51 |
2 files changed, 57 insertions, 0 deletions
diff --git a/sim/aarch64/ChangeLog b/sim/aarch64/ChangeLog index dbe68ec..243ec0e 100644 --- a/sim/aarch64/ChangeLog +++ b/sim/aarch64/ChangeLog @@ -1,3 +1,9 @@ +2017-02-25 Jim Wilson <jim.wilson@linaro.org> + + * simulator.c (popcount): New. + (do_vec_CNT): New. + (do_vec_op1): Add do_vec_CNT call. + 2017-02-19 Jim Wilson <jim.wilson@linaro.org> * simulator.c (do_vec_ADDV): Mov val declaration inside each case, diff --git a/sim/aarch64/simulator.c b/sim/aarch64/simulator.c index d31cb10..f430159 100644 --- a/sim/aarch64/simulator.c +++ b/sim/aarch64/simulator.c @@ -4197,6 +4197,56 @@ do_vec_XTN (sim_cpu *cpu) } } +/* Return the number of bits set in the input value. */ +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) +# define popcount __builtin_popcount +#else +static int +popcount (unsigned char x) +{ + static const unsigned char popcnt[16] = + { + 0, 1, 1, 2, + 1, 2, 2, 3, + 1, 2, 2, 3, + 2, 3, 3, 4 + }; + + /* Only counts the low 8 bits of the input as that is all we need. */ + return popcnt[x % 16] + popcnt[x / 16]; +} +#endif + +static void +do_vec_CNT (sim_cpu *cpu) +{ + /* instr[31] = 0 + instr[30] = half (0)/ full (1) + instr[29,24] = 00 1110 + instr[23,22] = size: byte(00) + instr[21,10] = 1000 0001 0110 + instr[9,5] = Vs + instr[4,0] = Vd. */ + + unsigned vs = INSTR (9, 5); + unsigned vd = INSTR (4, 0); + int full = INSTR (30, 30); + int size = INSTR (23, 22); + int i; + + NYI_assert (29, 24, 0x0E); + NYI_assert (21, 10, 0x816); + + if (size != 0) + HALT_UNALLOC; + + TRACE_DECODE (cpu, "emulated at line %d", __LINE__); + + for (i = 0; i < (full ? 16 : 8); i++) + aarch64_set_vec_u8 (cpu, vd, i, + popcount (aarch64_get_vec_u8 (cpu, vs, i))); +} + static void do_vec_maxv (sim_cpu *cpu) { @@ -5605,6 +5655,7 @@ do_vec_op1 (sim_cpu *cpu) case 0x08: do_vec_sub_long (cpu); return; case 0x0a: do_vec_XTN (cpu); return; case 0x11: do_vec_SSHL (cpu); return; + case 0x16: do_vec_CNT (cpu); return; case 0x19: do_vec_max (cpu); return; case 0x1B: do_vec_min (cpu); return; case 0x21: do_vec_add (cpu); return; |