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nios2: Assembly macros and definitions
This patch add assembly macros and definitions used in the .S files across arch/nios2/ and together with asm-offsets.c. Signed-off-by: Ley Foon Tan <lftan@altera.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,309 @@ | ||
| /* | ||
| * 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. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | ||
| * NON INFRINGEMENT. See the GNU General Public License for more | ||
| * details. | ||
| * | ||
| */ | ||
| #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 */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| /* | ||
| * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> | ||
| * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw> | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
|
|
||
| #include <generated/asm-offsets.h> |
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