x64: Lower fcopysign, ceil, floor, nearest, and trunc in ISLE (#4730)

https://github.com/bytecodealliance/wasmtime/pull/4730

cranelift/codegen/src/isa/x64/inst.isle

@@ -1120,6 +1120,15 @@
 (decl encode_fcmp_imm (FcmpImm) u8)
 (extern constructor encode_fcmp_imm encode_fcmp_imm)
 
+(type RoundImm extern
+      (enum RoundNearest
+            RoundDown
+            RoundUp
+            RoundZero))
+
+(decl encode_round_imm (RoundImm) u8)
+(extern constructor encode_round_imm encode_round_imm)
+
 ;;;; Newtypes for Different Register Classes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 (type Gpr (primitive Gpr))
@@ -1394,6 +1403,9 @@
 (decl use_fma () Type)
 (extern extractor use_fma use_fma)
 
+(decl use_sse41 () Type)
+(extern extractor use_sse41 use_sse41)
+
 ;;;; Helpers for Merging and Sinking Immediates/Loads  ;;;;;;;;;;;;;;;;;;;;;;;;;
 
 ;; Extract a constant `Imm8Reg.Imm8` from a value operand.
@@ -2575,6 +2587,42 @@
                     lane
                     size))
 
+;; Helper for creating `roundss` instructions.
+(decl x64_roundss (Xmm RoundImm) Xmm)
+(rule (x64_roundss src1 round)
+      (xmm_rm_r_imm (SseOpcode.Roundss)
+                    src1
+                    src1
+                    (encode_round_imm round)
+                    (OperandSize.Size32)))
+
+;; Helper for creating `roundsd` instructions.
+(decl x64_roundsd (Xmm RoundImm) Xmm)
+(rule (x64_roundsd src1 round)
+      (xmm_rm_r_imm (SseOpcode.Roundsd)
+                    src1
+                    src1
+                    (encode_round_imm round)
+                    (OperandSize.Size32)))
+
+;; Helper for creating `roundps` instructions.
+(decl x64_roundps (Xmm RoundImm) Xmm)
+(rule (x64_roundps src1 round)
+      (xmm_rm_r_imm (SseOpcode.Roundps)
+                    src1
+                    src1
+                    (encode_round_imm round)
+                    (OperandSize.Size32)))
+
+;; Helper for creating `roundpd` instructions.
+(decl x64_roundpd (Xmm RoundImm) Xmm)
+(rule (x64_roundpd src1 round)
+      (xmm_rm_r_imm (SseOpcode.Roundpd)
+                    src1
+                    src1
+                    (encode_round_imm round)
+                    (OperandSize.Size32)))
+
 ;; Helper for creating `pmaddwd` instructions.
 (decl x64_pmaddwd (Xmm XmmMem) Xmm)
 (rule (x64_pmaddwd src1 src2)
@@ -3659,7 +3707,18 @@
 (type LibCall extern
       (enum
         FmaF32
-        FmaF64))
+        FmaF64
+        CeilF32
+        CeilF64
+        FloorF32
+        FloorF64
+        NearestF32
+        NearestF64
+        TruncF32
+        TruncF64))
+
+(decl libcall_1 (LibCall Reg) Reg)
+(extern constructor libcall_1 libcall_1)
 
 (decl libcall_3 (LibCall Reg Reg Reg) Reg)
 (extern constructor libcall_3 libcall_3)