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Diffstat (limited to 'arch/nios2/include/asm/asm-macros.h')
| -rw-r--r-- | arch/nios2/include/asm/asm-macros.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/asm-macros.h b/arch/nios2/include/asm/asm-macros.h new file mode 100644 index 000000000..522e50a17 --- /dev/null +++ b/arch/nios2/include/asm/asm-macros.h @@ -0,0 +1,298 @@ +/* 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 */ |