/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Macro used to simplify coding multi-line assembler. * Some of the bit test macro can simplify down to one line * depending on the mask value. * * Copyright (C) 2004 Microtronix Datacom Ltd. * * All rights reserved. */ #ifndef _ASM_NIOS2_ASMMACROS_H #define _ASM_NIOS2_ASMMACROS_H /* * ANDs reg2 with mask and places the result in reg1. * * You cannnot use the same register for reg1 & reg2. */ .macro ANDI32 reg1, reg2, mask .if \mask & 0xffff .if \mask & 0xffff0000 movhi \reg1, %hi(\mask) movui \reg1, %lo(\mask) and \reg1, \reg1, \reg2 .else andi \reg1, \reg2, %lo(\mask) .endif .else andhi \reg1, \reg2, %hi(\mask) .endif .endm /* * ORs reg2 with mask and places the result in reg1. * * It is safe to use the same register for reg1 & reg2. */ .macro ORI32 reg1, reg2, mask .if \mask & 0xffff .if \mask & 0xffff0000 orhi \reg1, \reg2, %hi(\mask) ori \reg1, \reg2, %lo(\mask) .else ori \reg1, \reg2, %lo(\mask) .endif .else orhi \reg1, \reg2, %hi(\mask) .endif .endm /* * XORs reg2 with mask and places the result in reg1. * * It is safe to use the same register for reg1 & reg2. */ .macro XORI32 reg1, reg2, mask .if \mask & 0xffff .if \mask & 0xffff0000 xorhi \reg1, \reg2, %hi(\mask) xori \reg1, \reg1, %lo(\mask) .else xori \reg1, \reg2, %lo(\mask) .endif .else xorhi \reg1, \reg2, %hi(\mask) .endif .endm /* * This is a support macro for BTBZ & BTBNZ. It checks * the bit to make sure it is valid 32 value. * * It is safe to use the same register for reg1 & reg2. */ .macro BT reg1, reg2, bit .if \bit > 31 .err .else .if \bit < 16 andi \reg1, \reg2, (1 << \bit) .else andhi \reg1, \reg2, (1 << (\bit - 16)) .endif .endif .endm /* * Tests the bit in reg2 and branches to label if the * bit is zero. The result of the bit test is stored in reg1. * * It is safe to use the same register for reg1 & reg2. */ .macro BTBZ reg1, reg2, bit, label BT \reg1, \reg2, \bit beq \reg1, r0, \label .endm /* * Tests the bit in reg2 and branches to label if the * bit is non-zero. The result of the bit test is stored in reg1. * * It is safe to use the same register for reg1 & reg2. */ .macro BTBNZ reg1, reg2, bit, label BT \reg1, \reg2, \bit bne \reg1, r0, \label .endm /* * Tests the bit in reg2 and then compliments the bit in reg2. * The result of the bit test is stored in reg1. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTC reg1, reg2, bit .if \bit > 31 .err .else .if \bit < 16 andi \reg1, \reg2, (1 << \bit) xori \reg2, \reg2, (1 << \bit) .else andhi \reg1, \reg2, (1 << (\bit - 16)) xorhi \reg2, \reg2, (1 << (\bit - 16)) .endif .endif .endm /* * Tests the bit in reg2 and then sets the bit in reg2. * The result of the bit test is stored in reg1. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTS reg1, reg2, bit .if \bit > 31 .err .else .if \bit < 16 andi \reg1, \reg2, (1 << \bit) ori \reg2, \reg2, (1 << \bit) .else andhi \reg1, \reg2, (1 << (\bit - 16)) orhi \reg2, \reg2, (1 << (\bit - 16)) .endif .endif .endm /* * Tests the bit in reg2 and then resets the bit in reg2. * The result of the bit test is stored in reg1. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTR reg1, reg2, bit .if \bit > 31 .err .else .if \bit < 16 andi \reg1, \reg2, (1 << \bit) andi \reg2, \reg2, %lo(~(1 << \bit)) .else andhi \reg1, \reg2, (1 << (\bit - 16)) andhi \reg2, \reg2, %lo(~(1 << (\bit - 16))) .endif .endif .endm /* * Tests the bit in reg2 and then compliments the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTCBZ reg1, reg2, bit, label BTC \reg1, \reg2, \bit beq \reg1, r0, \label .endm /* * Tests the bit in reg2 and then compliments the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was non-zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTCBNZ reg1, reg2, bit, label BTC \reg1, \reg2, \bit bne \reg1, r0, \label .endm /* * Tests the bit in reg2 and then sets the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTSBZ reg1, reg2, bit, label BTS \reg1, \reg2, \bit beq \reg1, r0, \label .endm /* * Tests the bit in reg2 and then sets the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was non-zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTSBNZ reg1, reg2, bit, label BTS \reg1, \reg2, \bit bne \reg1, r0, \label .endm /* * Tests the bit in reg2 and then resets the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTRBZ reg1, reg2, bit, label BTR \reg1, \reg2, \bit bne \reg1, r0, \label .endm /* * Tests the bit in reg2 and then resets the bit in reg2. * The result of the bit test is stored in reg1. If the * original bit was non-zero it branches to label. * * It is NOT safe to use the same register for reg1 & reg2. */ .macro BTRBNZ reg1, reg2, bit, label BTR \reg1, \reg2, \bit bne \reg1, r0, \label .endm /* * Tests the bits in mask against reg2 stores the result in reg1. * If the all the bits in the mask are zero it branches to label. * * It is safe to use the same register for reg1 & reg2. */ .macro TSTBZ reg1, reg2, mask, label ANDI32 \reg1, \reg2, \mask beq \reg1, r0, \label .endm /* * Tests the bits in mask against reg2 stores the result in reg1. * If the any of the bits in the mask are 1 it branches to label. * * It is safe to use the same register for reg1 & reg2. */ .macro TSTBNZ reg1, reg2, mask, label ANDI32 \reg1, \reg2, \mask bne \reg1, r0, \label .endm /* * Pushes reg onto the stack. */ .macro PUSH reg addi sp, sp, -4 stw \reg, 0(sp) .endm /* * Pops the top of the stack into reg. */ .macro POP reg ldw \reg, 0(sp) addi sp, sp, 4 .endm #endif /* _ASM_NIOS2_ASMMACROS_H */