Add fclass.{s|d} instructions

2 files changed, 10 insertions, 0 deletions

diff --git a/pk/encoding.h b/pk/encoding.h
index 8a4a342..74f72bd 100644
--- a/pk/encoding.h
+++ b/pk/encoding.h
@@ -145,6 +145,8 @@
 #define MASK_SLTIU  0x707f
 #define MATCH_FADD_S 0x53
 #define MASK_FADD_S  0xfe00007f
+#define MATCH_FCLASS_D 0xea000053
+#define MASK_FCLASS_D  0xfff0707f
 #define MATCH_FCVT_S_W 0x70000053
 #define MASK_FCVT_S_W  0xfff0007f
 #define MATCH_MUL 0x2000033
@@ -197,6 +199,8 @@
 #define MASK_BLT  0x707f
 #define MATCH_SCALL 0x73
 #define MASK_SCALL  0xffffffff
+#define MATCH_FCLASS_S 0xe8000053
+#define MASK_FCLASS_S  0xfff0707f
 #define MATCH_SC_W 0x1800202f
 #define MASK_SC_W  0xf800707f
 #define MATCH_REM 0x2006033
@@ -487,6 +491,7 @@ DECLARE_INSN(bgeu, MATCH_BGEU, MASK_BGEU)
 DECLARE_INSN(fadd_d, MATCH_FADD_D, MASK_FADD_D)
 DECLARE_INSN(sltiu, MATCH_SLTIU, MASK_SLTIU)
 DECLARE_INSN(fadd_s, MATCH_FADD_S, MASK_FADD_S)
+DECLARE_INSN(fclass_d, MATCH_FCLASS_D, MASK_FCLASS_D)
 DECLARE_INSN(fcvt_s_w, MATCH_FCVT_S_W, MASK_FCVT_S_W)
 DECLARE_INSN(mul, MATCH_MUL, MASK_MUL)
 DECLARE_INSN(amominu_d, MATCH_AMOMINU_D, MASK_AMOMINU_D)
@@ -513,6 +518,7 @@ DECLARE_INSN(xor, MATCH_XOR, MASK_XOR)
 DECLARE_INSN(sub, MATCH_SUB, MASK_SUB)
 DECLARE_INSN(blt, MATCH_BLT, MASK_BLT)
 DECLARE_INSN(scall, MATCH_SCALL, MASK_SCALL)
+DECLARE_INSN(fclass_s, MATCH_FCLASS_S, MASK_FCLASS_S)
 DECLARE_INSN(sc_w, MATCH_SC_W, MASK_SC_W)
 DECLARE_INSN(rem, MATCH_REM, MASK_REM)
 DECLARE_INSN(srliw, MATCH_SRLIW, MASK_SRLIW)
diff --git a/pk/fp.c b/pk/fp.c
index 5848448..537dc23 100644
--- a/pk/fp.c
+++ b/pk/fp.c
@@ -192,6 +192,10 @@ int emulate_fp(trapframe_t* tf)
     XRDR = f32_to_ui64(frs1s, softfloat_roundingMode, true);
   else if(IS_INSN(FCVT_LU_D))
     XRDR = f64_to_ui64(frs1d, softfloat_roundingMode, true);
+  else if(IS_INSN(FCLASS_S))
+    XRDR = f32_classify(frs1s);
+  else if(IS_INSN(FCLASS_D))
+    XRDR = f64_classify(frs1s);
   else
     return -1;