[PATCH v2 4/4] target/riscv: rvv: Remove redudant SEW checking for vector fp narrow/widen instructions

[Max Chou]

If the checking functions check both the single and double width
operators at the same time, then the single width operator checking
functions (require_rvf[min]) will check whether the SEW is 8.

Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/insn_trans/trans_rvv.c.inc | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvv.c.inc 
b/target/riscv/insn_trans/trans_rvv.c.inc
index 19059fea5f7..08c22f48cb4 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -2333,7 +2333,6 @@ static bool opfvv_widen_check(DisasContext *s, arg_rmrr 
*a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dss(s, a->rd, a->rs1, a->rs2, a->vm);
 }
@@ -2373,7 +2372,6 @@ static bool opfvf_widen_check(DisasContext *s, arg_rmrr 
*a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_ds(s, a->rd, a->rs2, a->vm);
 }
@@ -2406,7 +2404,6 @@ static bool opfwv_widen_check(DisasContext *s, arg_rmrr 
*a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dds(s, a->rd, a->rs1, a->rs2, a->vm);
 }
@@ -2446,7 +2443,6 @@ static bool opfwf_widen_check(DisasContext *s, arg_rmrr 
*a)
     return require_rvv(s) &&
            require_rvf(s) &&
            require_scale_rvf(s) &&
-           (s->sew != MO_8) &&
            vext_check_isa_ill(s) &&
            vext_check_dd(s, a->rd, a->rs2, a->vm);
 }
@@ -2704,8 +2700,7 @@ static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
 {
     return opfv_widen_check(s, a) &&
            require_rvfmin(s) &&
-           require_scale_rvfmin(s) &&
-           (s->sew != MO_8);
+           require_scale_rvfmin(s);
 }
 
 #define GEN_OPFV_WIDEN_TRANS(NAME, CHECK, HELPER, FRM)             \
@@ -2810,16 +2805,14 @@ static bool opffv_narrow_check(DisasContext *s, arg_rmr 
*a)
 {
     return opfv_narrow_check(s, a) &&
            require_rvfmin(s) &&
-           require_scale_rvfmin(s) &&
-           (s->sew != MO_8);
+           require_scale_rvfmin(s);
 }
 
 static bool opffv_rod_narrow_check(DisasContext *s, arg_rmr *a)
 {
     return opfv_narrow_check(s, a) &&
            require_rvf(s) &&
-           require_scale_rvf(s) &&
-           (s->sew != MO_8);
+           require_scale_rvf(s);
 }
 
 #define GEN_OPFV_NARROW_TRANS(NAME, CHECK, HELPER, FRM)            \
@@ -2947,8 +2940,7 @@ static bool freduction_widen_check(DisasContext *s, 
arg_rmrr *a)
 {
     return reduction_widen_check(s, a) &&
            require_rvf(s) &&
-           require_scale_rvf(s) &&
-           (s->sew != MO_8);
+           require_scale_rvf(s);
 }
 
 GEN_OPFVV_WIDEN_TRANS(vfwredusum_vs, freduction_widen_check)
-- 
2.34.1