[K210] update compile parameters and startup_gcc.S

bsp/k210/rtconfig.py

@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY  = PREFIX + 'objcopy'
 
-    DEVICE  = ' -mcmodel=medany -march=rv64imafdc -mabi=lp64d'
+    DEVICE  = ' -mcmodel=medany -march=rv64imafc -mabi=lp64f -fsingle-precision-constant'
     CFLAGS  = DEVICE + ' -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields'
     AFLAGS  = ' -c' + DEVICE + ' -x assembler-with-cpp'
     LFLAGS  = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,_start -T link.lds'

libcpu/risc-v/k210/startup_gcc.S

@@ -67,38 +67,38 @@ _start:
   csrs mstatus, t0
 
   fssr    x0
-  fmv.d.x f0, x0
-  fmv.d.x f1, x0
-  fmv.d.x f2, x0
-  fmv.d.x f3, x0
-  fmv.d.x f4, x0
-  fmv.d.x f5, x0
-  fmv.d.x f6, x0
-  fmv.d.x f7, x0
-  fmv.d.x f8, x0
-  fmv.d.x f9, x0
-  fmv.d.x f10,x0
-  fmv.d.x f11,x0
-  fmv.d.x f12,x0
-  fmv.d.x f13,x0
-  fmv.d.x f14,x0
-  fmv.d.x f15,x0
-  fmv.d.x f16,x0
-  fmv.d.x f17,x0
-  fmv.d.x f18,x0
-  fmv.d.x f19,x0
-  fmv.d.x f20,x0
-  fmv.d.x f21,x0
-  fmv.d.x f22,x0
-  fmv.d.x f23,x0
-  fmv.d.x f24,x0
-  fmv.d.x f25,x0
-  fmv.d.x f26,x0
-  fmv.d.x f27,x0
-  fmv.d.x f28,x0
-  fmv.d.x f29,x0
-  fmv.d.x f30,x0
-  fmv.d.x f31,x0
+  fmv.w.x f0, x0
+  fmv.w.x f1, x0
+  fmv.w.x f2, x0
+  fmv.w.x f3, x0
+  fmv.w.x f4, x0
+  fmv.w.x f5, x0
+  fmv.w.x f6, x0
+  fmv.w.x f7, x0
+  fmv.w.x f8, x0
+  fmv.w.x f9, x0
+  fmv.w.x f10,x0
+  fmv.w.x f11,x0
+  fmv.w.x f12,x0
+  fmv.w.x f13,x0
+  fmv.w.x f14,x0
+  fmv.w.x f15,x0
+  fmv.w.x f16,x0
+  fmv.w.x f17,x0
+  fmv.w.x f18,x0
+  fmv.w.x f19,x0
+  fmv.w.x f20,x0
+  fmv.w.x f21,x0
+  fmv.w.x f22,x0
+  fmv.w.x f23,x0
+  fmv.w.x f24,x0
+  fmv.w.x f25,x0
+  fmv.w.x f26,x0
+  fmv.w.x f27,x0
+  fmv.w.x f28,x0
+  fmv.w.x f29,x0
+  fmv.w.x f30,x0
+  fmv.w.x f31,x0
 
 .option push
 .option norelax