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ec6e5de665
Change-Id: I0161cd65c71df00fadad9dd69e207e9fb29a54ef Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
98 lines
1.7 KiB
NASM
98 lines
1.7 KiB
NASM
; returns modified node_ptr
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; uint32_t proc_heap(uint64_t *heap, uint32_t heap_size);
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%include "reg_sizes.asm"
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%include "heap_macros.asm"
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%ifidn __OUTPUT_FORMAT__, win64
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%define heap rcx ; pointer, 64-bit
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%define heap_size rdx
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%define arg3 r8
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%define child rsi
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%define tmp32 rdi
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%else
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%define heap rdi
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%define heap_size rsi
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%define arg3 rdx
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%define child rcx
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%define tmp32 rdx
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%endif
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%define node_ptr rax
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%define h1 r8
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%define h2 r9
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%define h3 r10
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%define i r11
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%define tmp2 r12
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global build_huff_tree
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build_huff_tree:
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%ifidn __OUTPUT_FORMAT__, win64
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push rsi
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push rdi
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%endif
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push r12
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mov node_ptr, arg3
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.main_loop:
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; REMOVE_MIN64(heap, heap_size, h1);
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mov h2, [heap + heap_size*8]
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mov h1, [heap + 1*8]
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mov qword [heap + heap_size*8], -1
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dec heap_size
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mov [heap + 1*8], h2
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mov i, 1
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heapify heap, heap_size, i, child, h2, h3, tmp32, tmp2
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mov h2, [heap + 1*8]
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lea h3, [h1 + h2]
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mov [heap + node_ptr*8], h1 %+ w
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mov [heap + node_ptr*8 - 8], h2 %+ w
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and h3, 0XFFFF0000 ; sign extends to FFFFFFFFFFFF0000
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or h3, node_ptr
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sub node_ptr, 2
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; replace_min64(heap, heap_size, h3)
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mov [heap + 1*8], h3
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mov i, 1
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heapify heap, heap_size, i, child, h2, h3, tmp32, tmp2
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cmp heap_size, 1
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ja .main_loop
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mov h1, [heap + 1*8]
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mov [heap + node_ptr*8], h1 %+ w
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pop r12
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%ifidn __OUTPUT_FORMAT__, win64
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pop rdi
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pop rsi
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%endif
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ret
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align 32
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global build_heap
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build_heap:
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%ifidn __OUTPUT_FORMAT__, win64
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push rsi
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push rdi
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%endif
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push r12
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mov qword [heap + heap_size*8 + 8], -1
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mov i, heap_size
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shr i, 1
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.loop:
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mov h1, i
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heapify heap, heap_size, h1, child, h2, h3, tmp32, tmp2
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dec i
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jnz .loop
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pop r12
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%ifidn __OUTPUT_FORMAT__, win64
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pop rdi
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pop rsi
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%endif
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ret
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