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[RFC v3 54/71] target/riscv: rvv-1.0: slide instructions
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From: |
frank . chang |
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Subject: |
[RFC v3 54/71] target/riscv: rvv-1.0: slide instructions |
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Date: |
Thu, 6 Aug 2020 18:46:51 +0800 |
From: Frank Chang <frank.chang@sifive.com>
* Remove clear function from helper functions as the tail elements
are unchanged in RVV 1.0.
Signed-off-by: Frank Chang <frank.chang@sifive.com>
---
target/riscv/vector_helper.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 59c35343790..1e779723a0f 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -4707,17 +4707,22 @@ GEN_VEXT_VSLIDEUP_VX(vslideup_vx_d, uint64_t, H8)
void HELPER(NAME)(void *vd, void *v0, target_ulong s1, void *vs2, \
CPURISCVState *env, uint32_t desc) \
{ \
- uint32_t vlmax = env_archcpu(env)->cfg.vlen; \
+ uint32_t vlmax = vext_max_elems(desc, sizeof(ETYPE), false); \
uint32_t vm = vext_vm(desc); \
uint32_t vl = env->vl; \
- target_ulong offset = s1, i; \
+ target_ulong i_max, i; \
\
- for (i = 0; i < vl; ++i) { \
- target_ulong j = i + offset; \
- if (!vm && !vext_elem_mask(v0, i)) { \
- continue; \
+ i_max = MIN(s1 < vlmax ? vlmax - s1 : 0, vl); \
+ for (i = 0; i < i_max; ++i) { \
+ if (vm || vext_elem_mask(v0, i)) { \
+ *((ETYPE *)vd + H(i)) = *((ETYPE *)vs2 + H(i + s1)); \
+ } \
+ } \
+ \
+ for (i = i_max; i < vl; ++i) { \
+ if (vm || vext_elem_mask(v0, i)) { \
+ *((ETYPE *)vd + H(i)) = 0; \
} \
- *((ETYPE *)vd + H(i)) = j >= vlmax ? 0 : *((ETYPE *)vs2 + H(j)); \
} \
}
--
2.17.1
- [RFC v3 44/71] target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow, (continued)
- [RFC v3 44/71] target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow, frank . chang, 2020/08/06
- [RFC v3 45/71] target/riscv: rvv-1.0: narrowing integer right shift instructions, frank . chang, 2020/08/06
- [RFC v3 46/71] target/riscv: rvv-1.0: widening integer multiply-add instructions, frank . chang, 2020/08/06
- [RFC v3 47/71] target/riscv: rvv-1.0: add Zvqmac extension, frank . chang, 2020/08/06
- [RFC v3 48/71] target/riscv: rvv-1.0: quad-widening integer multiply-add instructions, frank . chang, 2020/08/06
- [RFC v3 49/71] target/riscv: rvv-1.0: single-width saturating add and subtract instructions, frank . chang, 2020/08/06
- [RFC v3 51/71] target/riscv: use softfloat lib float16 comparison functions, frank . chang, 2020/08/06
- [RFC v3 50/71] target/riscv: rvv-1.0: integer comparison instructions, frank . chang, 2020/08/06
- [RFC v3 52/71] target/riscv: rvv-1.0: floating-point compare instructions, frank . chang, 2020/08/06
- [RFC v3 53/71] target/riscv: rvv-1.0: mask-register logical instructions, frank . chang, 2020/08/06
- [RFC v3 54/71] target/riscv: rvv-1.0: slide instructions,
frank . chang <=
- [RFC v3 55/71] target/riscv: rvv-1.0: floating-point slide instructions, frank . chang, 2020/08/06
- [RFC v3 56/71] target/riscv: rvv-1.0: narrowing fixed-point clip instructions, frank . chang, 2020/08/06
- [RFC v3 57/71] target/riscv: rvv-1.0: single-width floating-point reduction, frank . chang, 2020/08/06
- [RFC v3 58/71] target/riscv: rvv-1.0: widening floating-point reduction instructions, frank . chang, 2020/08/06
- [RFC v3 59/71] target/riscv: rvv-1.0: single-width scaling shift instructions, frank . chang, 2020/08/06
- [RFC v3 60/71] target/riscv: rvv-1.0: remove widening saturating scaled multiply-add, frank . chang, 2020/08/06
- [RFC v3 61/71] target/riscv: rvv-1.0: remove vmford.vv and vmford.vf, frank . chang, 2020/08/06
- [RFC v3 62/71] target/riscv: rvv-1.0: remove integer extract instruction, frank . chang, 2020/08/06
- [RFC v3 63/71] target/riscv: rvv-1.0: floating-point min/max instructions, frank . chang, 2020/08/06
- [RFC v3 64/71] target/riscv: introduce floating-point rounding mode enum, frank . chang, 2020/08/06