cpu.*: docs
Björn Lindqvist
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75b6b12d0e
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cde510d69c
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@ -137,6 +137,16 @@ HELP: %c-invoke
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{ $values { "symbols" byte-array } { "dll" dll } { "gc-map" gc-map } }
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{ $description "Emits code for calling an FFI function." } ;
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HELP: %check-nursery-branch
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{ $values
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{ "label" "label" }
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{ "size" integer }
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{ "cc" "comparison symbol" }
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{ "temp1" "first temporary register" }
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{ "temp2" "second temporary register" }
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}
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{ $description "Emits code for jumping to the nursery garbage collection block if an allocation of size 'size' requires a garbage collection." } ;
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HELP: %context
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{ $values { "dst" "a register symbol" } }
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{ $description "Emits machine code for putting a pointer to the context field of the " { $link vm } " in a register." }
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@ -254,6 +264,14 @@ HELP: %shl-imm
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} { $description "Bitshifts the value in a register left by a constant." }
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{ $see-also ##shl-imm } ;
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HELP: %spill
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{ $values
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{ "src" "source register" }
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{ "rep" representation }
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{ "dst" spill-slot }
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} { $description "Emits machine code for spilling a register to a spill slot." }
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{ $see-also %reload } ;
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HELP: %store-memory-imm
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{ $values
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{ "value" "source register" }
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@ -317,6 +335,9 @@ HELP: dummy-int-params?
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{ $values { "?" boolean } }
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{ $description "Whether the architecture's ABI uses dummy integer parameters. If it does, then the corresponding integer register is 'dummy allocated' when a floating point register is allocated." } { $see-also dummy-fp-params? } ;
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HELP: float-regs
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{ $description "Floating point register class." } ;
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HELP: fused-unboxing?
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{ $values { "?" boolean } }
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{ $description "Whether this architecture support " { $link %load-float } ", " { $link %load-double } ", and " { $link %load-vector } "." } ;
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@ -348,6 +369,9 @@ HELP: immediate-store?
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{ $values { "n" number } { "?" boolean } }
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{ $description "Can this value be an immediate operand for %replace-imm?" } ;
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HELP: int-regs
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{ $description "Integer register class." } ;
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HELP: machine-registers
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{ $values { "assoc" assoc } }
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{ $description "Mapping from register class to machine registers. Only registers not reserved by the Factor VM are included." } ;
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@ -358,7 +382,8 @@ HELP: param-regs
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HELP: rep-size
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{ $values { "rep" representation } { "n" integer } }
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{ $description "Size in bytes of a representation." } ;
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{ $description "Size in bytes of a representation." }
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{ $see representation } ;
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HELP: reg-class-of
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{ $values { "rep" representation } { "reg-class" reg-class } }
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@ -392,13 +417,19 @@ HELP: stack-cleanup
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}
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} ;
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HELP: stack-frame-size
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{ $values
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{ "stack-frame" stack-frame }
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{ "n" integer }
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} { $description "Calculates the total size of a stack frame, including padding and alignment." } ;
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HELP: test-instruction?
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{ $values { "?" boolean } }
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{ $description "Does the current architecture have a test instruction? Used on x86 to rewrite some " { $link CMP } " instructions to less expensive " { $link TEST } "s." } ;
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HELP: vm-stack-space
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{ $values { "n" number } }
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{ $description "Parameter space to reserve in anything making VM calls." } ;
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{ $description "Parameter space to reserve in anything making VM calls. Why is this set to 16 on x86.32?" } ;
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ARTICLE: "cpu.architecture" "CPU architecture description model"
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"The " { $vocab-link "cpu.architecture" } " vocab contains generic words and hooks that serves as an api for the compiler towards the cpu architecture."
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@ -412,12 +443,56 @@ $nl
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fused-unboxing?
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test-instruction?
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}
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"Arithmetic:"
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{ $subsections
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%add
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%add-imm
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%sub
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%sub-imm
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%mul
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%mul-imm
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%neg
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}
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"Bit twiddling:"
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{ $subsections
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%and
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%and-imm
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%not
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%or
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%or-imm
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%sar
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%sar-imm
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%shl
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%shl-imm
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%shr
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%shr-imm
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%xor
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%xor-imm
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}
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"Control flow code emitters:"
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{ $subsections %call %jump %jump-label %return }
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{ $subsections
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%call
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%epilogue
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%jump
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%jump-label
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%prologue
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%return
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%safepoint
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}
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"Foreign function interface:"
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{ $subsections %c-invoke }
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"Garbage collection:"
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{ $subsections
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%call-gc
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%check-nursery-branch
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}
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"Moving values around:"
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{ $subsections %replace %replace-imm }
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{ $subsections
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%clear
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%peek
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%replace
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%replace-imm
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}
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"Register categories:"
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{ $subsections
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machine-registers
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@ -443,8 +518,8 @@ $nl
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%slot-imm
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%write-barrier
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}
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"Spilling:"
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{ $subsections gc-root-offset }
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"Spilling & reloading:"
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{ $subsections %spill %reload gc-root-offset }
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"Value as immediate checks:"
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{ $subsections
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immediate-arithmetic?
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@ -22,7 +22,7 @@ HELP: JLE
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HELP: reserved-stack-space
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{ $values { "n" integer } }
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{ $description "Size in bytes of the register parameter area. It only exists on the windows x86.64 architecture, where it is 32 bytes and allocated by the caller. On all other platforms it is 0." } ;
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{ $description "Size in bytes of the register parameter area. It only exists on the windows " { $link x86.64 } " architecture, where it is 32 bytes and allocated by the caller. On all other platforms it is 0." } ;
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HELP: stack-reg
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{ $values { "reg" "a register symbol" } }
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