Add implied rules to enable the implied extensions of Zvfofp4min
extension recursively.

Signed-off-by: Max Chou <max.chou@sifive.com>
---
 target/riscv/cpu.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 9d4fc3ab6b..ec1bf8034f 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -2526,6 +2526,15 @@ static RISCVCPUImpliedExtsRule ZVFOFP8MIN_IMPLIED = {
     },
 };
 
+static RISCVCPUImpliedExtsRule ZVFOFP4MIN_IMPLIED = {
+    .ext = CPU_CFG_OFFSET(ext_zvfofp4min),
+    .implied_multi_exts = {
+        CPU_CFG_OFFSET(ext_zve32f),
+
+        RISCV_IMPLIED_EXTS_RULE_END
+    },
+};
+
 static RISCVCPUImpliedExtsRule ZVKN_IMPLIED = {
     .ext = CPU_CFG_OFFSET(ext_zvkn),
     .implied_multi_exts = {
@@ -2663,7 +2672,7 @@ RISCVCPUImpliedExtsRule *riscv_multi_ext_implied_rules[] = {
     &ZKS_IMPLIED, &ZVBB_IMPLIED, &ZVE32F_IMPLIED,
     &ZVE32X_IMPLIED, &ZVE64D_IMPLIED, &ZVE64F_IMPLIED, &ZVE64X_IMPLIED,
     &ZVFBFA_IMPLIED, &ZVFBFMIN_IMPLIED, &ZVFBFWMA_IMPLIED,
-    &ZVFH_IMPLIED, &ZVFHMIN_IMPLIED, &ZVFOFP8MIN_IMPLIED,
+    &ZVFH_IMPLIED, &ZVFHMIN_IMPLIED, &ZVFOFP4MIN_IMPLIED, &ZVFOFP8MIN_IMPLIED,
     &ZVKN_IMPLIED,
     &ZVKNC_IMPLIED, &ZVKNG_IMPLIED, &ZVKNHB_IMPLIED,
     &ZVKS_IMPLIED,  &ZVKSC_IMPLIED, &ZVKSG_IMPLIED, &SSCFG_IMPLIED,
-- 
2.43.7