1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_mips64.S Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,122 @@
1.4 +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +#include <sys/regdef.h>
1.9 +#include <sys/asm.h>
1.10 +
1.11 +.text
1.12 +.globl invoke_count_words
1.13 +.globl invoke_copy_to_stack
1.14 +
1.15 +LOCALSZ=7 # a0, a1, a2, a3, s0, ra, gp
1.16 +FRAMESZ=(((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
1.17 +
1.18 +RAOFF=FRAMESZ-(1*SZREG)
1.19 +A0OFF=FRAMESZ-(2*SZREG)
1.20 +A1OFF=FRAMESZ-(3*SZREG)
1.21 +A2OFF=FRAMESZ-(4*SZREG)
1.22 +A3OFF=FRAMESZ-(5*SZREG)
1.23 +S0OFF=FRAMESZ-(6*SZREG)
1.24 +GPOFF=FRAMESZ-(7*SZREG)
1.25 +
1.26 +#
1.27 +# _NS_InvokeByIndex(that, methodIndex, paramCount, params)
1.28 +# a0 a1 a2 a3
1.29 +
1.30 +NESTED(_NS_InvokeByIndex, FRAMESZ, ra)
1.31 + PTR_SUBU sp, FRAMESZ
1.32 + SETUP_GP64(GPOFF, _NS_InvokeByIndex)
1.33 +
1.34 + REG_S ra, RAOFF(sp)
1.35 + REG_S a0, A0OFF(sp)
1.36 + REG_S a1, A1OFF(sp)
1.37 + REG_S a2, A2OFF(sp)
1.38 + REG_S a3, A3OFF(sp)
1.39 + REG_S s0, S0OFF(sp)
1.40 +
1.41 + # invoke_count_words(paramCount, params)
1.42 + move a0, a2
1.43 + move a1, a3
1.44 + jal invoke_count_words
1.45 +
1.46 + # invoke_copy_to_stack(uint32_t* d, uint32_t paramCount,
1.47 + # nsXPTCVariant* s, uint32_t *reg)
1.48 +
1.49 + REG_L a1, A2OFF(sp) # a1 - paramCount
1.50 + REG_L a2, A3OFF(sp) # a2 - params
1.51 +
1.52 + # save sp before we copy the params to the stack
1.53 + move t0, sp
1.54 +
1.55 + # assume full size of 16 bytes per param to be safe
1.56 + sll v0, 4 # 16 bytes * num params
1.57 + subu sp, sp, v0 # make room
1.58 + move a0, sp # a0 - param stack address
1.59 +
1.60 + # create temporary stack space to write int and fp regs
1.61 + subu sp, 64 # 64 = 8 regs of 8 bytes
1.62 + move a3, sp
1.63 +
1.64 + # save the old sp and save the arg stack
1.65 + subu sp, sp, 16
1.66 + REG_S t0, 0(sp)
1.67 + REG_S a0, 8(sp)
1.68 +
1.69 + # copy the param into the stack areas
1.70 + jal invoke_copy_to_stack
1.71 +
1.72 + REG_L t3, 8(sp) # get previous a0
1.73 + REG_L sp, 0(sp) # get orig sp back
1.74 +
1.75 + REG_L a0, A0OFF(sp) # a0 - that
1.76 + REG_L a1, A1OFF(sp) # a1 - methodIndex
1.77 +
1.78 + # t1 = methodIndex * pow(2, PTRLOG)
1.79 + # (use shift instead of mult)
1.80 + sll t1, a1, PTRLOG
1.81 +
1.82 + # calculate the function we need to jump to,
1.83 + # which must then be saved in t9
1.84 + lw t9, 0(a0)
1.85 + addu t9, t9, t1
1.86 + lw t9, (t9)
1.87 +
1.88 + # get register save area from invoke_copy_to_stack
1.89 + subu t1, t3, 64
1.90 +
1.91 + # a1..a7 and f13..f19 should now be set to what
1.92 + # invoke_copy_to_stack told us. skip a0 and f12
1.93 + # because that's the "this" pointer
1.94 +
1.95 + REG_L a1, 0(t1)
1.96 + REG_L a2, 8(t1)
1.97 + REG_L a3, 16(t1)
1.98 + REG_L a4, 24(t1)
1.99 + REG_L a5, 32(t1)
1.100 + REG_L a6, 40(t1)
1.101 + REG_L a7, 48(t1)
1.102 +
1.103 + l.d $f13, 0(t1)
1.104 + l.d $f14, 8(t1)
1.105 + l.d $f15, 16(t1)
1.106 + l.d $f16, 24(t1)
1.107 + l.d $f17, 32(t1)
1.108 + l.d $f18, 40(t1)
1.109 + l.d $f19, 48(t1)
1.110 +
1.111 + # save away our stack pointer and create
1.112 + # the stack pointer for the function
1.113 + move s0, sp
1.114 + move sp, t3
1.115 +
1.116 + jalr t9
1.117 +
1.118 + move sp, s0
1.119 +
1.120 + RESTORE_GP64
1.121 + REG_L ra, RAOFF(sp)
1.122 + REG_L s0, S0OFF(sp)
1.123 + PTR_ADDU sp, FRAMESZ
1.124 + j ra
1.125 +.end _NS_InvokeByIndex
