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Instr-branch

Make-instr-branch

Basic constructor macro for instr-branch structures.

Syntax

(make-instr-branch [:funct <funct>] 
                   [:rs1 <rs1>] 
                   [:rs2 <rs2>] 
                   [:imm <imm>])

This is the usual way to construct instr-branch structures. It simply conses together a structure with the specified fields.

This macro generates a new instr-branch structure from scratch. See also change-instr-branch, which can "change" an existing structure, instead.

Definition

This is an ordinary make- macro introduced by fty::defprod.

Macro: make-instr-branch

(defmacro make-instr-branch (&rest args)
  (std::make-aggregate 'instr-branch
                       args '((:funct) (:rs1) (:rs2) (:imm))
                       'make-instr-branch
                       nil))

Function: instr-branch

(defun instr-branch (funct rs1 rs2 imm)
  (declare (xargs :guard (and (branch-funct-p funct)
                              (ubyte5p rs1)
                              (ubyte5p rs2)
                              (ubyte12p imm))))
  (declare (xargs :guard t))
  (let ((__function__ 'instr-branch))
    (declare (ignorable __function__))
    (b* ((funct (mbe :logic (branch-funct-fix funct)
                     :exec funct))
         (rs1 (mbe :logic (ubyte5-fix rs1) :exec rs1))
         (rs2 (mbe :logic (ubyte5-fix rs2) :exec rs2))
         (imm (mbe :logic (ubyte12-fix imm)
                   :exec imm)))
      (cons :branch (list funct rs1 rs2 imm)))))