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| author | Richard Henderson <richard.henderson@linaro.org> | 2022-07-08 20:45:13 +0530 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-07-11 13:19:35 +0100 |
| commit | ad939afbfa4a0709d44d5806576607154a7489a8 (patch) | |
| tree | ee30bbfb133ee1e4a61786159bde98e28e0350d4 /target | |
| parent | 0d935760346b7ea07cbf5f63667151198012c922 (diff) | |
| download | qemu-ad939afbfa4a0709d44d5806576607154a7489a8.zip qemu-ad939afbfa4a0709d44d5806576607154a7489a8.tar.gz qemu-ad939afbfa4a0709d44d5806576607154a7489a8.tar.bz2 | |
target/arm: Implement SME ZERO
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-19-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/helper-sme.h | 2 | ||||
| -rw-r--r-- | target/arm/sme.decode | 4 | ||||
| -rw-r--r-- | target/arm/sme_helper.c | 25 | ||||
| -rw-r--r-- | target/arm/translate-sme.c | 13 |
4 files changed, 44 insertions, 0 deletions
diff --git a/target/arm/helper-sme.h b/target/arm/helper-sme.h index 3bd48c2..c4ee1f0 100644 --- a/target/arm/helper-sme.h +++ b/target/arm/helper-sme.h @@ -19,3 +19,5 @@ DEF_HELPER_FLAGS_2(set_pstate_sm, TCG_CALL_NO_RWG, void, env, i32) DEF_HELPER_FLAGS_2(set_pstate_za, TCG_CALL_NO_RWG, void, env, i32) + +DEF_HELPER_FLAGS_3(sme_zero, TCG_CALL_NO_RWG, void, env, i32, i32) diff --git a/target/arm/sme.decode b/target/arm/sme.decode index c25c031..6e4483f 100644 --- a/target/arm/sme.decode +++ b/target/arm/sme.decode @@ -18,3 +18,7 @@ # # This file is processed by scripts/decodetree.py # + +### SME Misc + +ZERO 11000000 00 001 00000000000 imm:8 diff --git a/target/arm/sme_helper.c b/target/arm/sme_helper.c index b215725..eef2df7 100644 --- a/target/arm/sme_helper.c +++ b/target/arm/sme_helper.c @@ -59,3 +59,28 @@ void helper_set_pstate_za(CPUARMState *env, uint32_t i) memset(env->zarray, 0, sizeof(env->zarray)); } } + +void helper_sme_zero(CPUARMState *env, uint32_t imm, uint32_t svl) +{ + uint32_t i; + + /* + * Special case clearing the entire ZA space. + * This falls into the CONSTRAINED UNPREDICTABLE zeroing of any + * parts of the ZA storage outside of SVL. + */ + if (imm == 0xff) { + memset(env->zarray, 0, sizeof(env->zarray)); + return; + } + + /* + * Recall that ZAnH.D[m] is spread across ZA[n+8*m], + * so each row is discontiguous within ZA[]. + */ + for (i = 0; i < svl; i++) { + if (imm & (1 << (i % 8))) { + memset(&env->zarray[i], 0, svl); + } + } +} diff --git a/target/arm/translate-sme.c b/target/arm/translate-sme.c index 786c93f..9715045 100644 --- a/target/arm/translate-sme.c +++ b/target/arm/translate-sme.c @@ -33,3 +33,16 @@ */ #include "decode-sme.c.inc" + + +static bool trans_ZERO(DisasContext *s, arg_ZERO *a) +{ + if (!dc_isar_feature(aa64_sme, s)) { + return false; + } + if (sme_za_enabled_check(s)) { + gen_helper_sme_zero(cpu_env, tcg_constant_i32(a->imm), + tcg_constant_i32(streaming_vec_reg_size(s))); + } + return true; +} |