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[PULL 16/25] target/riscv: rvv: Add tail agnostic for vector integer com
From: |
Alistair Francis |
Subject: |
[PULL 16/25] target/riscv: rvv: Add tail agnostic for vector integer comparison instructions |
Date: |
Fri, 10 Jun 2022 14:26:46 +1000 |
From: eopXD <yueh.ting.chen@gmail.com>
Compares write mask registers, and so always operate under a tail-
agnostic policy.
Signed-off-by: eop Chen <eop.chen@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <165449614532.19704.7000832880482980398-9@git.sr.ht>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/vector_helper.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 056c2a1c7e..a64506bf02 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -1371,6 +1371,8 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
*vs2, \
{ \
uint32_t vm = vext_vm(desc); \
uint32_t vl = env->vl; \
+ uint32_t total_elems = env_archcpu(env)->cfg.vlen; \
+ uint32_t vta_all_1s = vext_vta_all_1s(desc); \
uint32_t i; \
\
for (i = env->vstart; i < vl; i++) { \
@@ -1382,6 +1384,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
*vs2, \
vext_set_elem_mask(vd, i, DO_OP(s2, s1)); \
} \
env->vstart = 0; \
+ /* mask destination register are always tail-agnostic */ \
+ /* set tail elements to 1s */ \
+ if (vta_all_1s) { \
+ for (; i < total_elems; i++) { \
+ vext_set_elem_mask(vd, i, 1); \
+ } \
+ } \
}
GEN_VEXT_CMP_VV(vmseq_vv_b, uint8_t, H1, DO_MSEQ)
@@ -1420,6 +1429,8 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
void *vs2, \
{ \
uint32_t vm = vext_vm(desc); \
uint32_t vl = env->vl; \
+ uint32_t total_elems = env_archcpu(env)->cfg.vlen; \
+ uint32_t vta_all_1s = vext_vta_all_1s(desc); \
uint32_t i; \
\
for (i = env->vstart; i < vl; i++) { \
@@ -1431,6 +1442,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
void *vs2, \
DO_OP(s2, (ETYPE)(target_long)s1)); \
} \
env->vstart = 0; \
+ /* mask destination register are always tail-agnostic */ \
+ /* set tail elements to 1s */ \
+ if (vta_all_1s) { \
+ for (; i < total_elems; i++) { \
+ vext_set_elem_mask(vd, i, 1); \
+ } \
+ } \
}
GEN_VEXT_CMP_VX(vmseq_vx_b, uint8_t, H1, DO_MSEQ)
--
2.36.1
- [PULL 05/25] hw/core/loader: return image sizes as ssize_t, (continued)
- [PULL 05/25] hw/core/loader: return image sizes as ssize_t, Alistair Francis, 2022/06/10
- [PULL 06/25] target/riscv: Wake on VS-level external interrupts, Alistair Francis, 2022/06/10
- [PULL 07/25] target/riscv/debug.c: keep experimental rv128 support working, Alistair Francis, 2022/06/10
- [PULL 08/25] target/riscv: rvv: Prune redundant ESZ, DSZ parameter passed, Alistair Francis, 2022/06/10
- [PULL 11/25] target/riscv: rvv: Early exit when vstart >= vl, Alistair Francis, 2022/06/10
- [PULL 09/25] target/riscv: rvv: Prune redundant access_type parameter passed, Alistair Francis, 2022/06/10
- [PULL 13/25] target/riscv: rvv: Add tail agnostic for vector load / store instructions, Alistair Francis, 2022/06/10
- [PULL 12/25] target/riscv: rvv: Add tail agnostic for vv instructions, Alistair Francis, 2022/06/10
- [PULL 17/25] target/riscv: rvv: Add tail agnostic for vector integer merge and move instructions, Alistair Francis, 2022/06/10
- [PULL 10/25] target/riscv: rvv: Rename ambiguous esz, Alistair Francis, 2022/06/10
- [PULL 16/25] target/riscv: rvv: Add tail agnostic for vector integer comparison instructions,
Alistair Francis <=
- [PULL 14/25] target/riscv: rvv: Add tail agnostic for vx, vvm, vxm instructions, Alistair Francis, 2022/06/10
- [PULL 15/25] target/riscv: rvv: Add tail agnostic for vector integer shift instructions, Alistair Francis, 2022/06/10
- [PULL 18/25] target/riscv: rvv: Add tail agnostic for vector fix-point arithmetic instructions, Alistair Francis, 2022/06/10
- [PULL 19/25] target/riscv: rvv: Add tail agnostic for vector floating-point instructions, Alistair Francis, 2022/06/10
- [PULL 20/25] target/riscv: rvv: Add tail agnostic for vector reduction instructions, Alistair Francis, 2022/06/10
- [PULL 21/25] target/riscv: rvv: Add tail agnostic for vector mask instructions, Alistair Francis, 2022/06/10
- [PULL 25/25] target/riscv: trans_rvv: Avoid assert for RV32 and e64, Alistair Francis, 2022/06/10
- [PULL 24/25] target/riscv: Don't expose the CPU properties on names CPUs, Alistair Francis, 2022/06/10
- [PULL 22/25] target/riscv: rvv: Add tail agnostic for vector permutation instructions, Alistair Francis, 2022/06/10
- [PULL 23/25] target/riscv: rvv: Add option 'rvv_ta_all_1s' to enable optional tail agnostic behavior, Alistair Francis, 2022/06/10