/* * include/asm-xtensa/asmmacro.h * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2005 Tensilica Inc. */ #ifndef _XTENSA_ASMMACRO_H #define _XTENSA_ASMMACRO_H #include <variant/core.h> /* * Some little helpers for loops. Use zero-overhead-loops * where applicable and if supported by the processor. * * __loopi ar, at, size, inc * ar register initialized with the start address * at scratch register used by macro * size size immediate value * inc increment * * __loops ar, as, at, inc_log2[, mask_log2][, cond][, ncond] * ar register initialized with the start address * as register initialized with the size * at scratch register use by macro * inc_log2 increment [in log2] * mask_log2 mask [in log2] * cond true condition (used in loop'cond') * ncond false condition (used in b'ncond') * * __loop as * restart loop. 'as' register must not have been modified! * * __endla ar, as, incr * ar start address (modified) * as scratch register used by __loops/__loopi macros or * end address used by __loopt macro * inc increment */ /* * loop for given size as immediate */ .macro __loopi ar, at, size, incr #if XCHAL_HAVE_LOOPS movi \at, ((\size + \incr - 1) / (\incr)) loop \at, 99f #else addi \at, \ar, \size 98: #endif .endm /* * loop for given size in register */ .macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond #if XCHAL_HAVE_LOOPS .ifgt \incr_log2 - 1 addi \at, \as, (1 << \incr_log2) - 1 .ifnc \mask_log2, extui \at, \at, \incr_log2, \mask_log2 .else srli \at, \at, \incr_log2 .endif .endif loop\cond \at, 99f #else .ifnc \mask_log2, extui \at, \as, \incr_log2, \mask_log2 .else .ifnc \ncond, srli \at, \as, \incr_log2 .endif .endif .ifnc \ncond, b\ncond \at, 99f .endif .ifnc \mask_log2, slli \at, \at, \incr_log2 add \at, \ar, \at .else add \at, \ar, \as .endif #endif 98: .endm /* * loop from ar to as */ .macro __loopt ar, as, at, incr_log2 #if XCHAL_HAVE_LOOPS sub \at, \as, \ar .ifgt \incr_log2 - 1 addi \at, \at, (1 << \incr_log2) - 1 srli \at, \at, \incr_log2 .endif loop \at, 99f #else 98: #endif .endm /* * restart loop. registers must be unchanged */ .macro __loop as #if XCHAL_HAVE_LOOPS loop \as, 99f #else 98: #endif .endm /* * end of loop with no increment of the address. */ .macro __endl ar, as #if !XCHAL_HAVE_LOOPS bltu \ar, \as, 98b #endif 99: .endm /* * end of loop with increment of the address. */ .macro __endla ar, as, incr addi \ar, \ar, \incr __endl \ar \as .endm #endif /* _XTENSA_ASMMACRO_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 685 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-uaccess.h | File | 4.11 KB | 0644 |
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asmmacro.h | File | 2.76 KB | 0644 |
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atomic.h | File | 7.38 KB | 0644 |
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barrier.h | File | 542 B | 0644 |
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bitops.h | File | 5.08 KB | 0644 |
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bootparam.h | File | 1.37 KB | 0644 |
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bugs.h | File | 451 B | 0644 |
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cache.h | File | 969 B | 0644 |
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cacheasm.h | File | 3.77 KB | 0644 |
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cacheflush.h | File | 5.76 KB | 0644 |
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checksum.h | File | 6 KB | 0644 |
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cmpxchg.h | File | 3.9 KB | 0644 |
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coprocessor.h | File | 5.05 KB | 0644 |
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current.h | File | 675 B | 0644 |
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delay.h | File | 1.63 KB | 0644 |
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dma-mapping.h | File | 855 B | 0644 |
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dma.h | File | 1.79 KB | 0644 |
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elf.h | File | 5.75 KB | 0644 |
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fixmap.h | File | 2.5 KB | 0644 |
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flat.h | File | 686 B | 0644 |
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ftrace.h | File | 979 B | 0644 |
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futex.h | File | 2.59 KB | 0644 |
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highmem.h | File | 2.33 KB | 0644 |
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hw_breakpoint.h | File | 1.45 KB | 0644 |
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hw_irq.h | File | 320 B | 0644 |
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initialize_mmu.h | File | 4.58 KB | 0644 |
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io.h | File | 2.09 KB | 0644 |
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irq.h | File | 1.46 KB | 0644 |
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irqflags.h | File | 1.99 KB | 0644 |
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kmem_layout.h | File | 2.07 KB | 0644 |
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mmu.h | File | 462 B | 0644 |
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mmu_context.h | File | 3.62 KB | 0644 |
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module.h | File | 525 B | 0644 |
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mxregs.h | File | 1.3 KB | 0644 |
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nommu_context.h | File | 602 B | 0644 |
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page.h | File | 5.69 KB | 0644 |
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pci-bridge.h | File | 2.16 KB | 0644 |
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pci.h | File | 1.37 KB | 0644 |
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perf_event.h | File | 108 B | 0644 |
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pgalloc.h | File | 1.84 KB | 0644 |
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pgtable.h | File | 14.89 KB | 0644 |
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platform.h | File | 1.75 KB | 0644 |
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processor.h | File | 7.44 KB | 0644 |
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ptrace.h | File | 3.74 KB | 0644 |
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regs.h | File | 3.87 KB | 0644 |
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segment.h | File | 376 B | 0644 |
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serial.h | File | 443 B | 0644 |
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shmparam.h | File | 561 B | 0644 |
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signal.h | File | 502 B | 0644 |
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smp.h | File | 967 B | 0644 |
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spinlock.h | File | 4.6 KB | 0644 |
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spinlock_types.h | File | 412 B | 0644 |
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stacktrace.h | File | 1.13 KB | 0644 |
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string.h | File | 2.65 KB | 0644 |
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switch_to.h | File | 601 B | 0644 |
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syscall.h | File | 982 B | 0644 |
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sysmem.h | File | 426 B | 0644 |
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thread_info.h | File | 3.62 KB | 0644 |
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timex.h | File | 1.79 KB | 0644 |
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tlb.h | File | 1.1 KB | 0644 |
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tlbflush.h | File | 5.53 KB | 0644 |
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traps.h | File | 1.87 KB | 0644 |
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types.h | File | 501 B | 0644 |
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uaccess.h | File | 8.67 KB | 0644 |
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ucontext.h | File | 540 B | 0644 |
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unaligned.h | File | 864 B | 0644 |
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unistd.h | File | 639 B | 0644 |
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user.h | File | 507 B | 0644 |
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vectors.h | File | 4.05 KB | 0644 |
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vga.h | File | 434 B | 0644 |
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