diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2021-05-24 18:02:56 -0700 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-05-25 16:01:43 +0100 |
| commit | 34688dbc1c49dfbdd6d87bfddaae1b0b338e18cb (patch) | |
| tree | 020ab7833f39de9ecbb257f8ebad2c906dbcc242 /target/arm/sve_helper.c | |
| parent | 743bb147733170b86a4d7d34ac83873ddc9c7061 (diff) | |
target/arm: Implement SVE2 WHILEGT, WHILEGE, WHILEHI, WHILEHS
Rename the existing sve_while (less-than) helper to sve_whilel
to make room for a new sve_whileg helper for greater-than.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525010358.152808-31-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/sve_helper.c')
| -rw-r--r-- | target/arm/sve_helper.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index 0ea4ae28db..7450977630 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -3750,7 +3750,7 @@ uint64_t HELPER(sve_cntp)(void *vn, void *vg, uint32_t pred_desc) return sum; } -uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc) +uint32_t HELPER(sve_whilel)(void *vd, uint32_t count, uint32_t pred_desc) { intptr_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ); intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ); @@ -3776,6 +3776,42 @@ uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc) return predtest_ones(d, oprsz, esz_mask); } +uint32_t HELPER(sve_whileg)(void *vd, uint32_t count, uint32_t pred_desc) +{ + intptr_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ); + intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ); + uint64_t esz_mask = pred_esz_masks[esz]; + ARMPredicateReg *d = vd; + intptr_t i, invcount, oprbits; + uint64_t bits; + + if (count == 0) { + return do_zero(d, oprsz); + } + + oprbits = oprsz * 8; + tcg_debug_assert(count <= oprbits); + + bits = esz_mask; + if (oprbits & 63) { + bits &= MAKE_64BIT_MASK(0, oprbits & 63); + } + + invcount = oprbits - count; + for (i = (oprsz - 1) / 8; i > invcount / 64; --i) { + d->p[i] = bits; + bits = esz_mask; + } + + d->p[i] = bits & MAKE_64BIT_MASK(invcount & 63, 64); + + while (--i >= 0) { + d->p[i] = 0; + } + + return predtest_ones(d, oprsz, esz_mask); +} + /* Recursive reduction on a function; * C.f. the ARM ARM function ReducePredicated. * |