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[PATCH qemu v14 08/15] target/riscv: rvv: Add tail agnostic for vector i
From: |
~eopxd |
Subject: |
[PATCH qemu v14 08/15] target/riscv: rvv: Add tail agnostic for vector integer comparison instructions |
Date: |
Tue, 03 May 2022 07:13:59 -0000 |
From: eopXD <eop.chen@sifive.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>
---
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 c1ae2ea2f1..ddaf364573 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -1373,6 +1373,8 @@ 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++) { \
@@ -1384,6 +1386,13 @@ 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)
@@ -1422,6 +1431,8 @@ 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++) { \
@@ -1433,6 +1444,13 @@ 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)
--
2.34.2
- [PATCH qemu v14 00/15] Add tail agnostic behavior for rvv instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 04/15] target/riscv: rvv: Add tail agnostic for vv instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 03/15] target/riscv: rvv: Early exit when vstart >= vl, ~eopxd, 2022/05/03
- [PATCH qemu v14 02/15] target/riscv: rvv: Rename ambiguous esz, ~eopxd, 2022/05/03
- [PATCH qemu v14 01/15] target/riscv: rvv: Prune redundant ESZ, DSZ parameter passed, ~eopxd, 2022/05/03
- [PATCH qemu v14 08/15] target/riscv: rvv: Add tail agnostic for vector integer comparison instructions,
~eopxd <=
- [PATCH qemu v14 05/15] target/riscv: rvv: Add tail agnostic for vector load / store instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 07/15] target/riscv: rvv: Add tail agnostic for vector integer shift instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 06/15] target/riscv: rvv: Add tail agnostic for vx, vvm, vxm instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 12/15] target/riscv: rvv: Add tail agnostic for vector reduction instructions, ~eopxd, 2022/05/03
- [PATCH qemu v14 10/15] target/riscv: rvv: Add tail agnostic for vector fix-point arithmetic instructions, ~eopxd, 2022/05/03