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