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104 lines
2.1 KiB
ArmAsm
104 lines
2.1 KiB
ArmAsm
#*
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#* Some misc routines for Allegrex MIPS
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#* (C) notaz, 2007-2008
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#*
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#* This work is licensed under the terms of MAME license.
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#* See COPYING file in the top-level directory.
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#*
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.set noreorder
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.set noat
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.text
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.align 4
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.globl memset32 # int *dest, int c, int count
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memset32:
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ms32_aloop:
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andi $t0, $a0, 0x3f
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beqz $t0, ms32_bloop_prep
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nop
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sw $a1, 0($a0)
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addiu $a2, -1
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beqz $a2, ms32_return
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addiu $a0, 4
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j ms32_aloop
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nop
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ms32_bloop_prep:
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srl $t0, $a2, 4 # we will do 64 bytes per iteration (cache line)
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beqz $t0, ms32_bloop_end
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ms32_bloop:
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addiu $t0, -1
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cache 0x18, ($a0) # create dirty exclusive
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sw $a1, 0x00($a0)
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sw $a1, 0x04($a0)
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sw $a1, 0x08($a0)
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sw $a1, 0x0c($a0)
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sw $a1, 0x10($a0)
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sw $a1, 0x14($a0)
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sw $a1, 0x18($a0)
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sw $a1, 0x1c($a0)
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sw $a1, 0x20($a0)
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sw $a1, 0x24($a0)
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sw $a1, 0x28($a0)
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sw $a1, 0x2c($a0)
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sw $a1, 0x30($a0)
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sw $a1, 0x34($a0)
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sw $a1, 0x38($a0)
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sw $a1, 0x3c($a0)
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bnez $t0, ms32_bloop
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addiu $a0, 0x40
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ms32_bloop_end:
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andi $a2, $a2, 0x0f
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beqz $a2, ms32_return
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ms32_cloop:
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addiu $a2, -1
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sw $a1, 0($a0)
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bnez $a2, ms32_cloop
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addiu $a0, 4
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ms32_return:
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jr $ra
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nop
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.globl memset32_uncached # int *dest, int c, int count
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memset32_uncached:
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srl $t0, $a2, 3 # we will do 32 bytes per iteration
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beqz $t0, ms32u_bloop_end
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ms32u_bloop:
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addiu $t0, -1
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sw $a1, 0x00($a0)
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sw $a1, 0x04($a0)
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sw $a1, 0x08($a0)
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sw $a1, 0x0c($a0)
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sw $a1, 0x10($a0)
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sw $a1, 0x14($a0)
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sw $a1, 0x18($a0)
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sw $a1, 0x1c($a0)
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bnez $t0, ms32u_bloop
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addiu $a0, 0x20
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ms32u_bloop_end:
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andi $a2, $a2, 0x0f
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beqz $a2, ms32u_return
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ms32u_cloop:
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addiu $a2, -1
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sw $a1, 0($a0)
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bnez $a2, ms32u_cloop
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addiu $a0, 4
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ms32u_return:
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jr $ra
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nop
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# vim:filetype=mips
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