[PATCH v6 07/72] target/riscv: rvv-1.0: remove rvv related codes from fcsr registers

[frank . chang]

From: Frank Chang <frank.chang@sifive.com>

* Remove VXRM and VXSAT fields from FCSR register as they are only
  presented in VCSR register.
* Remove RVV loose check in fs() predicate function.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/riscv/csr.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index c8b1e4954ec..6eda5bacb7c 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -46,10 +46,6 @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops)
 static int fs(CPURISCVState *env, int csrno)
 {
 #if !defined(CONFIG_USER_ONLY)
-    /* loose check condition for fcsr in vector extension */
-    if ((csrno == CSR_FCSR) && (env->misa & RVV)) {
-        return 0;
-    }
     if (!env->debugger && !riscv_cpu_fp_enabled(env)) {
         return -RISCV_EXCP_ILLEGAL_INST;
     }
@@ -254,10 +250,6 @@ static int read_fcsr(CPURISCVState *env, int csrno, 
target_ulong *val)
 #endif
     *val = (riscv_cpu_get_fflags(env) << FSR_AEXC_SHIFT)
         | (env->frm << FSR_RD_SHIFT);
-    if (vs(env, csrno) >= 0) {
-        *val |= (env->vxrm << FSR_VXRM_SHIFT)
-                | (env->vxsat << FSR_VXSAT_SHIFT);
-    }
     return 0;
 }
 
@@ -268,13 +260,8 @@ static int write_fcsr(CPURISCVState *env, int csrno, 
target_ulong val)
         return -RISCV_EXCP_ILLEGAL_INST;
     }
     env->mstatus |= MSTATUS_FS;
-    env->mstatus |= MSTATUS_VS;
 #endif
     env->frm = (val & FSR_RD) >> FSR_RD_SHIFT;
-    if (vs(env, csrno) >= 0) {
-        env->vxrm = (val & FSR_VXRM) >> FSR_VXRM_SHIFT;
-        env->vxsat = (val & FSR_VXSAT) >> FSR_VXSAT_SHIFT;
-    }
     riscv_cpu_set_fflags(env, (val & FSR_AEXC) >> FSR_AEXC_SHIFT);
     return 0;
 }
-- 
2.17.1