diff mbox series

[RFC,v2,54/76] target/riscv: rvv-0.9: floating-point compare instructions

Message ID 20200722091641.8834-55-frank.chang@sifive.com (mailing list archive)
State New, archived
Headers show
Series target/riscv: support vector extension v0.9 | expand

Commit Message

Frank Chang July 22, 2020, 9:16 a.m. UTC
From: Frank Chang <frank.chang@sifive.com>

Clear tail elements only if VTA is agnostic.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
---
 target/riscv/vector_helper.c | 52 ++++++++++++++++++++----------------
 1 file changed, 29 insertions(+), 23 deletions(-)
diff mbox series

Patch

diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 95cce063d0..8dccec4e04 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -4174,27 +4174,30 @@  GEN_VEXT_VF(vfsgnjx_vf_w, 4, 4, clearl)
 GEN_VEXT_VF(vfsgnjx_vf_d, 8, 8, clearq)
 
 /* Vector Floating-Point Compare Instructions */
-#define GEN_VEXT_CMP_VV_ENV(NAME, ETYPE, H, DO_OP)            \
-void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2,   \
-                  CPURISCVState *env, uint32_t desc)          \
-{                                                             \
-    uint32_t vm = vext_vm(desc);                              \
-    uint32_t vl = env->vl;                                    \
-    uint32_t vlmax = vext_maxsz(desc) / sizeof(ETYPE);        \
-    uint32_t i;                                               \
-                                                              \
-    for (i = 0; i < vl; i++) {                                \
-        ETYPE s1 = *((ETYPE *)vs1 + H(i));                    \
-        ETYPE s2 = *((ETYPE *)vs2 + H(i));                    \
-        if (!vm && !vext_elem_mask(v0, i)) {                  \
-            continue;                                         \
-        }                                                     \
-        vext_set_elem_mask(vd, i,                             \
-                           DO_OP(s2, s1, &env->fp_status));   \
-    }                                                         \
-    for (; i < vlmax; i++) {                                  \
-        vext_set_elem_mask(vd, i, 0);                         \
-    }                                                         \
+#define GEN_VEXT_CMP_VV_ENV(NAME, ETYPE, H, DO_OP)               \
+void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2,      \
+                  CPURISCVState *env, uint32_t desc)             \
+{                                                                \
+    uint32_t vm = vext_vm(desc);                                 \
+    uint32_t vl = env->vl;                                       \
+    uint32_t vlmax = vext_max_elems(desc, sizeof(ETYPE), false); \
+    uint32_t vta = vext_vta(desc);                               \
+    uint32_t i;                                                  \
+                                                                 \
+    for (i = 0; i < vl; i++) {                                   \
+        ETYPE s1 = *((ETYPE *)vs1 + H(i));                       \
+        ETYPE s2 = *((ETYPE *)vs2 + H(i));                       \
+        if (!vm && !vext_elem_mask(v0, i)) {                     \
+            continue;                                            \
+        }                                                        \
+        vext_set_elem_mask(vd, i,                                \
+                           DO_OP(s2, s1, &env->fp_status));      \
+    }                                                            \
+    if (vta == 1) {                                              \
+        for (; i < vlmax; i++) {                                 \
+            vext_set_elem_mask(vd, i, 1);                        \
+        }                                                        \
+    }                                                            \
 }
 
 GEN_VEXT_CMP_VV_ENV(vmfeq_vv_h, uint16_t, H2, float16_eq_quiet)
@@ -4208,6 +4211,7 @@  void HELPER(NAME)(void *vd, void *v0, uint64_t s1, void *vs2,       \
     uint32_t vm = vext_vm(desc);                                    \
     uint32_t vl = env->vl;                                          \
     uint32_t vlmax = vext_max_elems(desc, sizeof(ETYPE), false);    \
+    uint32_t vta = vext_vta(desc);                                  \
     uint32_t i;                                                     \
                                                                     \
     for (i = 0; i < vl; i++) {                                      \
@@ -4218,8 +4222,10 @@  void HELPER(NAME)(void *vd, void *v0, uint64_t s1, void *vs2,       \
         vext_set_elem_mask(vd, i,                                   \
                            DO_OP(s2, (ETYPE)s1, &env->fp_status));  \
     }                                                               \
-    for (; i < vlmax; i++) {                                        \
-        vext_set_elem_mask(vd, i, 0);                               \
+    if (vta == 1) {                                                 \
+        for (; i < vlmax; i++) {                                    \
+            vext_set_elem_mask(vd, i, 1);                           \
+        }                                                           \
     }                                                               \
 }