diff options
| author | Taylor Simpson <tsimpson@quicinc.com> | 2023-03-07 14:40:58 -0800 |
|---|---|---|
| committer | Taylor Simpson <tsimpson@quicinc.com> | 2023-04-21 09:32:52 -0700 |
| commit | a52584815e7adb2413893d2f5323bf7487c9117f (patch) | |
| tree | e1f4e2bf24e2ef3872cf6619c2269d766ed4999c /target/hexagon | |
| parent | 2bda44e8aa8ed3b60c9d373dcbfaf92d51b270ec (diff) | |
| download | qemu-a52584815e7adb2413893d2f5323bf7487c9117f.zip qemu-a52584815e7adb2413893d2f5323bf7487c9117f.tar.gz qemu-a52584815e7adb2413893d2f5323bf7487c9117f.tar.bz2 | |
Hexagon (target/hexagon) Add overrides for count trailing zeros/ones
The following instructions are overriden
S2_ct0 Count trailing zeros
S2_ct1 Count trailing ones
S2_ct0p Count trailing zeros (register pair)
S2_ct1p Count trailing ones (register pair)
These instructions are not handled by idef-parser because the
imported semantics uses bit-reverse. However, they are
straightforward to implement in TCG with tcg_gen_ctzi_*
Test cases added to tests/tcg/hexagon/misc.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230405164211.30015-1-tsimpson@quicinc.com>
Diffstat (limited to 'target/hexagon')
| -rw-r--r-- | target/hexagon/gen_tcg.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/target/hexagon/gen_tcg.h b/target/hexagon/gen_tcg.h index bcf0cf4..45f92ad 100644 --- a/target/hexagon/gen_tcg.h +++ b/target/hexagon/gen_tcg.h @@ -1058,6 +1058,30 @@ #define fGEN_TCG_SL2_jumpr31_fnew(SHORTCODE) \ gen_cond_jumpr31(ctx, TCG_COND_NE, hex_new_pred_value[0]) +/* Count trailing zeros/ones */ +#define fGEN_TCG_S2_ct0(SHORTCODE) \ + do { \ + tcg_gen_ctzi_tl(RdV, RsV, 32); \ + } while (0) +#define fGEN_TCG_S2_ct1(SHORTCODE) \ + do { \ + tcg_gen_not_tl(RdV, RsV); \ + tcg_gen_ctzi_tl(RdV, RdV, 32); \ + } while (0) +#define fGEN_TCG_S2_ct0p(SHORTCODE) \ + do { \ + TCGv_i64 tmp = tcg_temp_new_i64(); \ + tcg_gen_ctzi_i64(tmp, RssV, 64); \ + tcg_gen_extrl_i64_i32(RdV, tmp); \ + } while (0) +#define fGEN_TCG_S2_ct1p(SHORTCODE) \ + do { \ + TCGv_i64 tmp = tcg_temp_new_i64(); \ + tcg_gen_not_i64(tmp, RssV); \ + tcg_gen_ctzi_i64(tmp, tmp, 64); \ + tcg_gen_extrl_i64_i32(RdV, tmp); \ + } while (0) + /* Floating point */ #define fGEN_TCG_F2_conv_sf2df(SHORTCODE) \ gen_helper_conv_sf2df(RddV, cpu_env, RsV) |