runtime/arch/mips64/quick_entrypoints_mips64.S

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "asm_support_mips64.S"

#include "arch/quick_alloc_entrypoints.S"

    .set noreorder
    .balign 16

    /* Deliver the given exception */
    .extern artDeliverExceptionFromCode
    /* Deliver an exception pending on a thread */
    .extern artDeliverPendingExceptionFromCode

    /*
     * Macro that sets up $gp and stores the previous $gp value to $t8.
     * This macro modifies v1 and t8.
     */
.macro SETUP_GP
    move $v1, $ra
    bal 1f
    nop
1:
    .cpsetup $ra, $t8, 1b
    move $ra, $v1
.endm

    /*
     * Macro that sets up the callee save frame to conform with
     * Runtime::CreateCalleeSaveMethod(kSaveAll)
     * callee-save: padding + $f24-$f31 + $s0-$s7 + $gp + $ra + $s8 = 19 total + 1x8 bytes padding
     */
.macro SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    daddiu $sp, $sp, -160
    .cfi_adjust_cfa_offset 160

     // Ugly compile-time check, but we only have the preprocessor.
#if (FRAME_SIZE_SAVE_ALL_CALLEE_SAVE != 160)
#error "SAVE_ALL_CALLEE_SAVE_FRAME(MIPS64) size not as expected."
#endif

    sd     $ra, 152($sp)
    .cfi_rel_offset 31, 152
    sd     $s8, 144($sp)
    .cfi_rel_offset 30, 144
    sd     $t8, 136($sp)           # t8 holds caller's gp, now save it to the stack.
    .cfi_rel_offset 28, 136        # Value from gp is pushed, so set the cfi offset accordingly.
    sd     $s7, 128($sp)
    .cfi_rel_offset 23, 128
    sd     $s6, 120($sp)
    .cfi_rel_offset 22, 120
    sd     $s5, 112($sp)
    .cfi_rel_offset 21, 112
    sd     $s4, 104($sp)
    .cfi_rel_offset 20, 104
    sd     $s3,  96($sp)
    .cfi_rel_offset 19, 96
    sd     $s2,  88($sp)
    .cfi_rel_offset 18, 88
    sd     $s1,  80($sp)
    .cfi_rel_offset 17, 80
    sd     $s0,  72($sp)
    .cfi_rel_offset 16, 72

    // FP callee-saves
    s.d    $f31, 64($sp)
    s.d    $f30, 56($sp)
    s.d    $f29, 48($sp)
    s.d    $f28, 40($sp)
    s.d    $f27, 32($sp)
    s.d    $f26, 24($sp)
    s.d    $f25, 16($sp)
    s.d    $f24,  8($sp)

    # load appropriate callee-save-method
    ld      $t1, %got(_ZN3art7Runtime9instance_E)($gp)
    ld      $t1, 0($t1)
    ld      $t1, RUNTIME_SAVE_ALL_CALLEE_SAVE_FRAME_OFFSET($t1)
    sd      $t1, 0($sp)                                # Place ArtMethod* at bottom of stack.
    sd      $sp, THREAD_TOP_QUICK_FRAME_OFFSET(rSELF)  # Place sp in Thread::Current()->top_quick_frame.
.endm

    /*
     * Macro that sets up the callee save frame to conform with
     * Runtime::CreateCalleeSaveMethod(kRefsOnly). Restoration assumes
     * non-moving GC.
     * Does not include rSUSPEND or rSELF
     * callee-save: padding + $s2-$s7 + $gp + $ra + $s8 = 9 total + 1x8 bytes padding
     */
.macro SETUP_REFS_ONLY_CALLEE_SAVE_FRAME
    daddiu $sp, $sp, -80
    .cfi_adjust_cfa_offset 80

    // Ugly compile-time check, but we only have the preprocessor.
#if (FRAME_SIZE_REFS_ONLY_CALLEE_SAVE != 80)
#error "REFS_ONLY_CALLEE_SAVE_FRAME(MIPS64) size not as expected."
#endif

    sd     $ra, 72($sp)
    .cfi_rel_offset 31, 72
    sd     $s8, 64($sp)
    .cfi_rel_offset 30, 64
    sd     $t8, 56($sp)            # t8 holds caller's gp, now save it to the stack.
    .cfi_rel_offset 28, 56         # Value from gp is pushed, so set the cfi offset accordingly.
    sd     $s7, 48($sp)
    .cfi_rel_offset 23, 48
    sd     $s6, 40($sp)
    .cfi_rel_offset 22, 40
    sd     $s5, 32($sp)
    .cfi_rel_offset 21, 32
    sd     $s4, 24($sp)
    .cfi_rel_offset 20, 24
    sd     $s3, 16($sp)
    .cfi_rel_offset 19, 16
    sd     $s2, 8($sp)
    .cfi_rel_offset 18, 8
    # load appropriate callee-save-method
    ld      $t1, %got(_ZN3art7Runtime9instance_E)($gp)
    ld      $t1, 0($t1)
    ld      $t1, RUNTIME_REFS_ONLY_CALLEE_SAVE_FRAME_OFFSET($t1)
    sd      $t1, 0($sp)                                # Place Method* at bottom of stack.
    sd      $sp, THREAD_TOP_QUICK_FRAME_OFFSET(rSELF)  # Place sp in Thread::Current()->top_quick_frame.
.endm

.macro RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    ld     $ra, 72($sp)
    .cfi_restore 31
    ld     $s8, 64($sp)
    .cfi_restore 30
    ld     $t8, 56($sp)            # Restore gp back to it's temp storage.
    .cfi_restore 28
    ld     $s7, 48($sp)
    .cfi_restore 23
    ld     $s6, 40($sp)
    .cfi_restore 22
    ld     $s5, 32($sp)
    .cfi_restore 21
    ld     $s4, 24($sp)
    .cfi_restore 20
    ld     $s3, 16($sp)
    .cfi_restore 19
    ld     $s2, 8($sp)
    .cfi_restore 18
    daddiu $sp, $sp, 80
    .cfi_adjust_cfa_offset -80
    .cpreturn
.endm

.macro RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME_AND_RETURN
    ld     $ra, 72($sp)
    .cfi_restore 31
    ld     $s8, 64($sp)
    .cfi_restore 30
    ld     $t8, 56($sp)            # Restore gp back to it's temp storage.
    .cfi_restore 28
    ld     $s7, 48($sp)
    .cfi_restore 23
    ld     $s6, 40($sp)
    .cfi_restore 22
    ld     $s5, 32($sp)
    .cfi_restore 21
    ld     $s4, 24($sp)
    .cfi_restore 20
    ld     $s3, 16($sp)
    .cfi_restore 19
    ld     $s2, 8($sp)
    .cfi_restore 18
    .cpreturn
    jalr   $zero, $ra
    daddiu $sp, $sp, 80
    .cfi_adjust_cfa_offset -80
.endm

// This assumes the top part of these stack frame types are identical.
#define REFS_AND_ARGS_MINUS_REFS_SIZE (FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE - FRAME_SIZE_REFS_ONLY_CALLEE_SAVE)

.macro SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL
    daddiu  $sp, $sp, -208
    .cfi_adjust_cfa_offset 208

    // Ugly compile-time check, but we only have the preprocessor.
#if (FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE != 208)
#error "REFS_AND_ARGS_CALLEE_SAVE_FRAME(MIPS64) size not as expected."
#endif

    sd     $ra, 200($sp)           # = kQuickCalleeSaveFrame_RefAndArgs_LrOffset
    .cfi_rel_offset 31, 200
    sd     $s8, 192($sp)
    .cfi_rel_offset 30, 192
    sd     $t8, 184($sp)           # t8 holds caller's gp, now save it to the stack.
    .cfi_rel_offset 28, 184        # Value from gp is pushed, so set the cfi offset accordingly.
    sd     $s7, 176($sp)
    .cfi_rel_offset 23, 176
    sd     $s6, 168($sp)
    .cfi_rel_offset 22, 168
    sd     $s5, 160($sp)
    .cfi_rel_offset 21, 160
    sd     $s4, 152($sp)
    .cfi_rel_offset 20, 152
    sd     $s3, 144($sp)
    .cfi_rel_offset 19, 144
    sd     $s2, 136($sp)
    .cfi_rel_offset 18, 136

    sd     $a7, 128($sp)
    .cfi_rel_offset 11, 128
    sd     $a6, 120($sp)
    .cfi_rel_offset 10, 120
    sd     $a5, 112($sp)
    .cfi_rel_offset 9, 112
    sd     $a4, 104($sp)
    .cfi_rel_offset 8, 104
    sd     $a3,  96($sp)
    .cfi_rel_offset 7, 96
    sd     $a2,  88($sp)
    .cfi_rel_offset 6, 88
    sd     $a1,  80($sp)           # = kQuickCalleeSaveFrame_RefAndArgs_Gpr1Offset
    .cfi_rel_offset 5, 80

    s.d    $f19, 72($sp)
    s.d    $f18, 64($sp)
    s.d    $f17, 56($sp)
    s.d    $f16, 48($sp)
    s.d    $f15, 40($sp)
    s.d    $f14, 32($sp)
    s.d    $f13, 24($sp)           # = kQuickCalleeSaveFrame_RefAndArgs_Fpr1Offset
    s.d    $f12, 16($sp)           # This isn't necessary to store.
    # 1x8 bytes padding + Method*
.endm

    /*
     * Macro that sets up the callee save frame to conform with
     * Runtime::CreateCalleeSaveMethod(kRefsAndArgs). Restoration assumes
     * non-moving GC.
     * callee-save: padding + $f12-$f19 + $a1-$a7 + $s2-$s7 + $gp + $ra + $s8 = 24 total + 1 words padding + Method*
     */
.macro SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL
    # load appropriate callee-save-method
    ld      $t1, %got(_ZN3art7Runtime9instance_E)($gp)
    ld      $t1, 0($t1)
    ld      $t1, RUNTIME_REFS_AND_ARGS_CALLEE_SAVE_FRAME_OFFSET($t1)
    sd      $t1, 0($sp)                                # Place Method* at bottom of stack.
    sd      $sp, THREAD_TOP_QUICK_FRAME_OFFSET(rSELF)  # Place sp in Thread::Current()->top_quick_frame.
.endm

.macro SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_WITH_METHOD_IN_A0
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_INTERNAL
    sd      $a0, 0($sp)                                # Place Method* at bottom of stack.
    sd      $sp, THREAD_TOP_QUICK_FRAME_OFFSET(rSELF)  # Place sp in Thread::Current()->top_quick_frame.
.endm

.macro RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    ld     $ra, 200($sp)
    .cfi_restore 31
    ld     $s8, 192($sp)
    .cfi_restore 30
    ld     $t8, 184($sp)           # Restore gp back to it's temp storage.
    .cfi_restore 28
    ld     $s7, 176($sp)
    .cfi_restore 23
    ld     $s6, 168($sp)
    .cfi_restore 22
    ld     $s5, 160($sp)
    .cfi_restore 21
    ld     $s4, 152($sp)
    .cfi_restore 20
    ld     $s3, 144($sp)
    .cfi_restore 19
    ld     $s2, 136($sp)
    .cfi_restore 18

    ld     $a7, 128($sp)
    .cfi_restore 11
    ld     $a6, 120($sp)
    .cfi_restore 10
    ld     $a5, 112($sp)
    .cfi_restore 9
    ld     $a4, 104($sp)
    .cfi_restore 8
    ld     $a3,  96($sp)
    .cfi_restore 7
    ld     $a2,  88($sp)
    .cfi_restore 6
    ld     $a1,  80($sp)
    .cfi_restore 5

    l.d    $f19, 72($sp)
    l.d    $f18, 64($sp)
    l.d    $f17, 56($sp)
    l.d    $f16, 48($sp)
    l.d    $f15, 40($sp)
    l.d    $f14, 32($sp)
    l.d    $f13, 24($sp)
    l.d    $f12, 16($sp)

    .cpreturn
    daddiu $sp, $sp, 208
    .cfi_adjust_cfa_offset -208
.endm

    /*
     * Macro that set calls through to artDeliverPendingExceptionFromCode,
     * where the pending
     * exception is Thread::Current()->exception_
     */
.macro DELIVER_PENDING_EXCEPTION
    SETUP_GP
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME     # save callee saves for throw
    dla     $t9, artDeliverPendingExceptionFromCode
    jalr    $zero, $t9                   # artDeliverPendingExceptionFromCode(Thread*)
    move    $a0, rSELF                   # pass Thread::Current
.endm

.macro RETURN_IF_NO_EXCEPTION
    ld     $t0, THREAD_EXCEPTION_OFFSET(rSELF) # load Thread::Current()->exception_
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    bne    $t0, $zero, 1f                      # success if no exception is pending
    nop
    jalr   $zero, $ra
    nop
1:
    DELIVER_PENDING_EXCEPTION
.endm

.macro RETURN_IF_ZERO
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    bne    $v0, $zero, 1f                # success?
    nop
    jalr   $zero, $ra                    # return on success
    nop
1:
    DELIVER_PENDING_EXCEPTION
.endm

.macro RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    beq    $v0, $zero, 1f                # success?
    nop
    jalr   $zero, $ra                    # return on success
    nop
1:
    DELIVER_PENDING_EXCEPTION
.endm

    /*
     * On stack replacement stub.
     * On entry:
     *   a0 = stack to copy
     *   a1 = size of stack
     *   a2 = pc to call
     *   a3 = JValue* result
     *   a4 = shorty
     *   a5 = thread
     */
ENTRY art_quick_osr_stub
    move   $t0, $sp               # save stack pointer
    daddiu $t1, $sp, -112         # reserve stack space
    dsrl   $t1, $t1, 4            # enforce 16 byte stack alignment
    dsll   $sp, $t1, 4            # update stack pointer

    // Save callee general purpose registers, SP, T8(GP), RA, A3, and A4 (8x14 bytes)
    sd     $ra, 104($sp)
    .cfi_rel_offset 31, 104
    sd     $s8, 96($sp)
    .cfi_rel_offset 30, 96
    sd     $t0, 88($sp)           # save original stack pointer stored in t0
    .cfi_rel_offset 29, 88
    sd     $t8, 80($sp)           # t8 holds caller's gp, now save it to the stack.
    .cfi_rel_offset 28, 80        # Value from gp is pushed, so set the cfi offset accordingly.
    sd     $s7, 72($sp)
    .cfi_rel_offset 23, 72
    sd     $s6, 64($sp)
    .cfi_rel_offset 22, 64
    sd     $s5, 56($sp)
    .cfi_rel_offset 21, 56
    sd     $s4, 48($sp)
    .cfi_rel_offset 20, 48
    sd     $s3, 40($sp)
    .cfi_rel_offset 19, 40
    sd     $s2, 32($sp)
    .cfi_rel_offset 18, 32
    sd     $s1, 24($sp)
    .cfi_rel_offset 17, 24
    sd     $s0, 16($sp)
    .cfi_rel_offset 16, 16
    sd     $a4, 8($sp)
    .cfi_rel_offset 8, 8
    sd     $a3, 0($sp)
    .cfi_rel_offset 7, 0
    move   rSELF, $a5                      # Save managed thread pointer into rSELF

    daddiu $sp, $sp, -16
    jal    .Losr_entry
    sd     $zero, 0($sp)                   # Store null for ArtMethod* at bottom of frame
    daddiu $sp, $sp, 16

    // Restore return value address and shorty address
    ld     $a4, 8($sp)                     # shorty address
    .cfi_restore 8
    ld     $a3, 0($sp)                     # result value address
    .cfi_restore 7

    lbu    $t1, 0($a4)                     # load return type
    li     $t2, 'D'                        # put char 'D' into t2
    beq    $t1, $t2, .Losr_fp_result       # branch if result type char == 'D'
    li     $t2, 'F'                        # put char 'F' into t2
    beq    $t1, $t2, .Losr_fp_result       # branch if result type char == 'F'
    nop
    b      .Losr_exit
    dsrl   $v1, $v0, 32                    # put high half of result in v1
.Losr_fp_result:
    mfc1   $v0, $f0
    mfhc1  $v1, $f0                        # put high half of FP result in v1
.Losr_exit:
    sw     $v0, 0($a3)                     # store low half of result
    sw     $v1, 4($a3)                     # store high half of result

    // Restore callee registers
    ld     $ra, 104($sp)
    .cfi_restore 31
    ld     $s8, 96($sp)
    .cfi_restore 30
    ld     $t0, 88($sp)                    # save SP into t0 for now
    .cfi_restore 29
    ld     $t8, 80($sp)                    # Restore gp back to it's temp storage.
    .cfi_restore 28
    ld     $s7, 72($sp)
    .cfi_restore 23
    ld     $s6, 64($sp)
    .cfi_restore 22
    ld     $s5, 56($sp)
    .cfi_restore 21
    ld     $s4, 48($sp)
    .cfi_restore 20
    ld     $s3, 40($sp)
    .cfi_restore 19
    ld     $s2, 32($sp)
    .cfi_restore 18
    ld     $s1, 24($sp)
    .cfi_restore 17
    ld     $s0, 16($sp)
    .cfi_restore 16
    jalr   $zero, $ra
    move   $sp, $t0

.Losr_entry:
    dsubu  $sp, $sp, $a1                   # Reserve space for callee stack
    daddiu $a1, $a1, -8
    daddu  $t0, $a1, $sp
    sw     $ra, 0($t0)                     # Store low half of RA per compiler ABI
    dsrl   $t1, $ra, 32
    sw     $t1, 4($t0)                     # Store high half of RA per compiler ABI

    // Copy arguments into callee stack
    // Use simple copy routine for now.
    // 4 bytes per slot.
    // a0 = source address
    // a1 = args length in bytes (does not include 8 bytes for RA)
    // sp = destination address
    beqz   $a1, .Losr_loop_exit
    daddiu $a1, $a1, -4
    daddu  $t1, $a0, $a1
    daddu  $t2, $sp, $a1
.Losr_loop_entry:
    lw     $t0, 0($t1)
    daddiu $t1, $t1, -4
    sw     $t0, 0($t2)
    bne    $sp, $t2, .Losr_loop_entry
    daddiu $t2, $t2, -4

.Losr_loop_exit:
    move   $t9, $a2
    jalr   $zero, $t9                      # Jump to the OSR entry point.
    nop
END art_quick_osr_stub

    /*
     * On entry $a0 is uint32_t* gprs_ and $a1 is uint32_t* fprs_
     * FIXME: just guessing about the shape of the jmpbuf.  Where will pc be?
     */
ENTRY_NO_GP art_quick_do_long_jump
    l.d     $f0, 0($a1)
    l.d     $f1, 8($a1)
    l.d     $f2, 16($a1)
    l.d     $f3, 24($a1)
    l.d     $f4, 32($a1)
    l.d     $f5, 40($a1)
    l.d     $f6, 48($a1)
    l.d     $f7, 56($a1)
    l.d     $f8, 64($a1)
    l.d     $f9, 72($a1)
    l.d     $f10, 80($a1)
    l.d     $f11, 88($a1)
    l.d     $f12, 96($a1)
    l.d     $f13, 104($a1)
    l.d     $f14, 112($a1)
    l.d     $f15, 120($a1)
    l.d     $f16, 128($a1)
    l.d     $f17, 136($a1)
    l.d     $f18, 144($a1)
    l.d     $f19, 152($a1)
    l.d     $f20, 160($a1)
    l.d     $f21, 168($a1)
    l.d     $f22, 176($a1)
    l.d     $f23, 184($a1)
    l.d     $f24, 192($a1)
    l.d     $f25, 200($a1)
    l.d     $f26, 208($a1)
    l.d     $f27, 216($a1)
    l.d     $f28, 224($a1)
    l.d     $f29, 232($a1)
    l.d     $f30, 240($a1)
    l.d     $f31, 248($a1)
    .set push
    .set nomacro
    .set noat
# no need to load zero
    ld      $at, 8($a0)
    .set pop
    ld      $v0, 16($a0)
    ld      $v1, 24($a0)
# a0 has to be loaded last
    ld      $a1, 40($a0)
    ld      $a2, 48($a0)
    ld      $a3, 56($a0)
    ld      $a4, 64($a0)
    ld      $a5, 72($a0)
    ld      $a6, 80($a0)
    ld      $a7, 88($a0)
    ld      $t0, 96($a0)
    ld      $t1, 104($a0)
    ld      $t2, 112($a0)
    ld      $t3, 120($a0)
    ld      $s0, 128($a0)
    ld      $s1, 136($a0)
    ld      $s2, 144($a0)
    ld      $s3, 152($a0)
    ld      $s4, 160($a0)
    ld      $s5, 168($a0)
    ld      $s6, 176($a0)
    ld      $s7, 184($a0)
    ld      $t8, 192($a0)
    ld      $t9, 200($a0)
# no need to load k0, k1
    ld      $gp, 224($a0)
    ld      $sp, 232($a0)
    ld      $s8, 240($a0)
    ld      $ra, 248($a0)
    ld      $a0, 32($a0)
    move    $v0, $zero          # clear result registers v0 and v1
    jalr    $zero, $t9          # do long jump (do not use ra, it must not be clobbered)
    move    $v1, $zero
END art_quick_do_long_jump

    /*
     * Called by managed code, saves most registers (forms basis of long jump
     * context) and passes the bottom of the stack.
     * artDeliverExceptionFromCode will place the callee save Method* at
     * the bottom of the thread. On entry a0 holds Throwable*
     */
ENTRY art_quick_deliver_exception
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artDeliverExceptionFromCode
    jalr $zero, $t9                 # artDeliverExceptionFromCode(Throwable*, Thread*)
    move $a1, rSELF                 # pass Thread::Current
END art_quick_deliver_exception

    /*
     * Called by managed code to create and deliver a NullPointerException
     */
    .extern artThrowNullPointerExceptionFromCode
ENTRY art_quick_throw_null_pointer_exception
.Lart_quick_throw_null_pointer_exception_gp_set:
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowNullPointerExceptionFromCode
    jalr $zero, $t9                 # artThrowNullPointerExceptionFromCode(Thread*)
    move $a0, rSELF                 # pass Thread::Current
END art_quick_throw_null_pointer_exception

    /*
     * Call installed by a signal handler to create and deliver a NullPointerException
     */
    .extern artThrowNullPointerExceptionFromSignal
ENTRY art_quick_throw_null_pointer_exception_from_signal
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowNullPointerExceptionFromSignal
    jalr $zero, $t9                 # artThrowNullPointerExceptionFromSignal(uinptr_t, Thread*)
    move $a1, rSELF                 # pass Thread::Current
END art_quick_throw_null_pointer_exception

    /*
     * Called by managed code to create and deliver an ArithmeticException
     */
    .extern artThrowDivZeroFromCode
ENTRY art_quick_throw_div_zero
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowDivZeroFromCode
    jalr $zero, $t9                 # artThrowDivZeroFromCode(Thread*)
    move $a0, rSELF                 # pass Thread::Current
END art_quick_throw_div_zero

    /*
     * Called by managed code to create and deliver an
     * ArrayIndexOutOfBoundsException
     */
    .extern artThrowArrayBoundsFromCode
ENTRY art_quick_throw_array_bounds
.Lart_quick_throw_array_bounds_gp_set:
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowArrayBoundsFromCode
    jalr $zero, $t9                 # artThrowArrayBoundsFromCode(index, limit, Thread*)
    move $a2, rSELF                 # pass Thread::Current
END art_quick_throw_array_bounds

    /*
     * Called by managed code to create and deliver a StringIndexOutOfBoundsException
     * as if thrown from a call to String.charAt().
     */
    .extern artThrowStringBoundsFromCode
ENTRY art_quick_throw_string_bounds
.Lart_quick_throw_string_bounds_gp_set:
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowStringBoundsFromCode
    jalr $zero, $t9                 # artThrowStringBoundsFromCode(index, limit, Thread*)
    move $a2, rSELF                 # pass Thread::Current
END art_quick_throw_string_bounds

    /*
     * Called by managed code to create and deliver a StackOverflowError.
     */
    .extern artThrowStackOverflowFromCode
ENTRY art_quick_throw_stack_overflow
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowStackOverflowFromCode
    jalr $zero, $t9                 # artThrowStackOverflowFromCode(Thread*)
    move $a0, rSELF                 # pass Thread::Current
END art_quick_throw_stack_overflow

    /*
     * Called by managed code to create and deliver a NoSuchMethodError.
     */
    .extern artThrowNoSuchMethodFromCode
ENTRY art_quick_throw_no_such_method
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowNoSuchMethodFromCode
    jalr $zero, $t9                 # artThrowNoSuchMethodFromCode(method_idx, Thread*)
    move $a1, rSELF                 # pass Thread::Current
END art_quick_throw_no_such_method

    /*
     * All generated callsites for interface invokes and invocation slow paths will load arguments
     * as usual - except instead of loading arg0/$a0 with the target Method*, arg0/$a0 will contain
     * the method_idx.  This wrapper will save arg1-arg3, load the caller's Method*, align the
     * stack and call the appropriate C helper.
     * NOTE: "this" is first visable argument of the target, and so can be found in arg1/$a1.
     *
     * The helper will attempt to locate the target and return a 128-bit result in $v0/$v1 consisting
     * of the target Method* in $v0 and method->code_ in $v1.
     *
     * If unsuccessful, the helper will return null/null. There will be a pending exception in the
     * thread and we branch to another stub to deliver it.
     *
     * On success this wrapper will restore arguments and *jump* to the target, leaving the ra
     * pointing back to the original caller.
     */
.macro INVOKE_TRAMPOLINE_BODY cxx_name
    .extern \cxx_name
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME  # save callee saves in case allocation triggers GC
    move  $a2, rSELF                       # pass Thread::Current
    jal   \cxx_name                        # (method_idx, this, Thread*, $sp)
    move  $a3, $sp                         # pass $sp
    move  $a0, $v0                         # save target Method*
    move  $t9, $v1                         # save $v0->code_
    RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    beq   $v0, $zero, 1f
    nop
    jalr  $zero, $t9
    nop
1:
    DELIVER_PENDING_EXCEPTION
.endm
.macro INVOKE_TRAMPOLINE c_name, cxx_name
ENTRY \c_name
    INVOKE_TRAMPOLINE_BODY \cxx_name
END \c_name
.endm

INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck

INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck

    # On entry:
    #   t0 = shorty
    #   t1 = ptr to arg_array
    #   t2 = number of argument bytes remain
    #   v0 = ptr to stack frame where to copy arg_array
    # This macro modifies t3, t9 and v0
.macro LOOP_OVER_SHORTY_LOADING_REG gpu, fpu, label
    lbu    $t3, 0($t0)           # get argument type from shorty
    beqz   $t3, \label
    daddiu $t0, 1
    li     $t9, 68               # put char 'D' into t9
    beq    $t9, $t3, 1f          # branch if result type char == 'D'
    li     $t9, 70               # put char 'F' into t9
    beq    $t9, $t3, 2f          # branch if result type char == 'F'
    li     $t9, 74               # put char 'J' into t9
    beq    $t9, $t3, 3f          # branch if result type char == 'J'
    nop
    lw     $\gpu, 0($t1)
    sw     $\gpu, 0($v0)
    daddiu $v0, 4
    daddiu $t1, 4
    b      4f
    daddiu $t2, -4               # delay slot

1:  # found double
    lwu    $t3, 0($t1)
    mtc1   $t3, $\fpu
    sw     $t3, 0($v0)
    lwu    $t3, 4($t1)
    mthc1  $t3, $\fpu
    sw     $t3, 4($v0)
    daddiu $v0, 8
    daddiu $t1, 8
    b      4f
    daddiu $t2, -8               # delay slot

2:  # found float
    lwu    $t3, 0($t1)
    mtc1   $t3, $\fpu
    sw     $t3, 0($v0)
    daddiu $v0, 4
    daddiu $t1, 4
    b      4f
    daddiu $t2, -4               # delay slot

3:  # found long (8 bytes)
    lwu    $t3, 0($t1)
    sw     $t3, 0($v0)
    lwu    $t9, 4($t1)
    sw     $t9, 4($v0)
    dsll   $t9, $t9, 32
    or     $\gpu, $t9, $t3
    daddiu $v0, 8
    daddiu $t1, 8
    daddiu $t2, -8
4:
.endm

    /*
     * Invocation stub for quick code.
     * On entry:
     *   a0 = method pointer
     *   a1 = argument array that must at least contain the this ptr.
     *   a2 = size of argument array in bytes
     *   a3 = (managed) thread pointer
     *   a4 = JValue* result
     *   a5 = shorty
     */
ENTRY_NO_GP art_quick_invoke_stub
    # push a4, a5, s0(rSUSPEND), s1(rSELF), s8, ra onto the stack
    daddiu $sp, $sp, -48
    .cfi_adjust_cfa_offset 48
    sd     $ra, 40($sp)
    .cfi_rel_offset 31, 40
    sd     $s8, 32($sp)
    .cfi_rel_offset 30, 32
    sd     $s1, 24($sp)
    .cfi_rel_offset 17, 24
    sd     $s0, 16($sp)
    .cfi_rel_offset 16, 16
    sd     $a5, 8($sp)
    .cfi_rel_offset 9, 8
    sd     $a4, 0($sp)
    .cfi_rel_offset 8, 0

    daddiu $s0, $zero, SUSPEND_CHECK_INTERVAL   # reset rSUSPEND to SUSPEND_CHECK_INTERVAL
    move   $s1, $a3              # move managed thread pointer into s1 (rSELF)
    move   $s8, $sp              # save sp in s8 (fp)

    daddiu $t3, $a2, 24          # add 8 for ArtMethod* and 16 for stack alignment
    dsrl   $t3, $t3, 4           # shift the frame size right 4
    dsll   $t3, $t3, 4           # shift the frame size left 4 to align to 16 bytes
    dsubu  $sp, $sp, $t3         # reserve stack space for argument array

    daddiu $t0, $a5, 1           # t0 = shorty[1] (skip 1 for return type)
    daddiu $t1, $a1, 4           # t1 = ptr to arg_array[4] (skip this ptr)
    daddiu $t2, $a2, -4          # t2 = number of argument bytes remain (skip this ptr)
    daddiu $v0, $sp, 12          # v0 points to where to copy arg_array
    LOOP_OVER_SHORTY_LOADING_REG a2, f14, call_fn
    LOOP_OVER_SHORTY_LOADING_REG a3, f15, call_fn
    LOOP_OVER_SHORTY_LOADING_REG a4, f16, call_fn
    LOOP_OVER_SHORTY_LOADING_REG a5, f17, call_fn
    LOOP_OVER_SHORTY_LOADING_REG a6, f18, call_fn
    LOOP_OVER_SHORTY_LOADING_REG a7, f19, call_fn

    # copy arguments onto stack (t2 should be multiples of 4)
    ble    $t2, $zero, call_fn   # t2 = number of argument bytes remain
1:
    lw     $t3, 0($t1)           # load from argument array
    daddiu $t1, $t1, 4
    sw     $t3, 0($v0)           # save to stack
    daddiu $t2, -4
    bgt    $t2, $zero, 1b        # t2 = number of argument bytes remain
    daddiu $v0, $v0, 4

call_fn:
    # call method (a0 and a1 have been untouched)
    lwu    $a1, 0($a1)           # make a1 = this ptr
    sw     $a1, 8($sp)           # copy this ptr (skip 8 bytes for ArtMethod*)
    sd     $zero, 0($sp)         # store null for ArtMethod* at bottom of frame
    ld     $t9, ART_METHOD_QUICK_CODE_OFFSET_64($a0)  # get pointer to the code
    jalr   $t9                   # call the method
    nop
    move   $sp, $s8              # restore sp

    # pop a4, a5, s1(rSELF), s8, ra off of the stack
    ld     $a4, 0($sp)
    .cfi_restore 8
    ld     $a5, 8($sp)
    .cfi_restore 9
    ld     $s0, 16($sp)
    .cfi_restore 16
    ld     $s1, 24($sp)
    .cfi_restore 17
    ld     $s8, 32($sp)
    .cfi_restore 30
    ld     $ra, 40($sp)
    .cfi_restore 31
    daddiu $sp, $sp, 48
    .cfi_adjust_cfa_offset -48

    # a4 = JValue* result
    # a5 = shorty string
    lbu   $t1, 0($a5)           # get result type from shorty
    li    $t2, 68               # put char 'D' into t2
    beq   $t1, $t2, 1f          # branch if result type char == 'D'
    li    $t3, 70               # put char 'F' into t3
    beq   $t1, $t3, 1f          # branch if result type char == 'F'
    sw    $v0, 0($a4)           # store the result
    dsrl  $v1, $v0, 32
    jalr  $zero, $ra
    sw    $v1, 4($a4)           # store the other half of the result
1:
    mfc1  $v0, $f0
    mfhc1 $v1, $f0
    sw    $v0, 0($a4)           # store the result
    jalr  $zero, $ra
    sw    $v1, 4($a4)           # store the other half of the result
END art_quick_invoke_stub

    /*
     * Invocation static stub for quick code.
     * On entry:
     *   a0 = method pointer
     *   a1 = argument array that must at least contain the this ptr.
     *   a2 = size of argument array in bytes
     *   a3 = (managed) thread pointer
     *   a4 = JValue* result
     *   a5 = shorty
     */
ENTRY_NO_GP art_quick_invoke_static_stub

    # push a4, a5, s0(rSUSPEND), s1(rSELF), s8, ra, onto the stack
    daddiu $sp, $sp, -48
    .cfi_adjust_cfa_offset 48
    sd     $ra, 40($sp)
    .cfi_rel_offset 31, 40
    sd     $s8, 32($sp)
    .cfi_rel_offset 30, 32
    sd     $s1, 24($sp)
    .cfi_rel_offset 17, 24
    sd     $s0, 16($sp)
    .cfi_rel_offset 16, 16
    sd     $a5, 8($sp)
    .cfi_rel_offset 9, 8
    sd     $a4, 0($sp)
    .cfi_rel_offset 8, 0

    daddiu $s0, $zero, SUSPEND_CHECK_INTERVAL   # reset rSUSPEND to SUSPEND_CHECK_INTERVAL
    move   $s1, $a3              # move managed thread pointer into s1 (rSELF)
    move   $s8, $sp              # save sp in s8 (fp)

    daddiu $t3, $a2, 24          # add 8 for ArtMethod* and 16 for stack alignment
    dsrl   $t3, $t3, 4           # shift the frame size right 4
    dsll   $t3, $t3, 4           # shift the frame size left 4 to align to 16 bytes
    dsubu  $sp, $sp, $t3         # reserve stack space for argument array

    daddiu $t0, $a5, 1           # t0 = shorty[1] (skip 1 for return type)
    move   $t1, $a1              # t1 = arg_array
    move   $t2, $a2              # t2 = number of argument bytes remain
    daddiu $v0, $sp, 8           # v0 points to where to copy arg_array
    LOOP_OVER_SHORTY_LOADING_REG a1, f13, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a2, f14, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a3, f15, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a4, f16, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a5, f17, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a6, f18, call_sfn
    LOOP_OVER_SHORTY_LOADING_REG a7, f19, call_sfn

    # copy arguments onto stack (t2 should be multiples of 4)
    ble    $t2, $zero, call_sfn  # t2 = number of argument bytes remain
1:
    lw     $t3, 0($t1)           # load from argument array
    daddiu $t1, $t1, 4
    sw     $t3, 0($v0)           # save to stack
    daddiu $t2, -4
    bgt    $t2, $zero, 1b        # t2 = number of argument bytes remain
    daddiu $v0, $v0, 4

call_sfn:
    # call method (a0 has been untouched)
    sd     $zero, 0($sp)         # store null for ArtMethod* at bottom of frame
    ld     $t9, ART_METHOD_QUICK_CODE_OFFSET_64($a0)  # get pointer to the code
    jalr   $t9                   # call the method
    nop
    move   $sp, $s8              # restore sp

    # pop a4, a5, s0(rSUSPEND), s1(rSELF), s8, ra off of the stack
    ld     $a4, 0($sp)
    .cfi_restore 8
    ld     $a5, 8($sp)
    .cfi_restore 9
    ld     $s0, 16($sp)
    .cfi_restore 16
    ld     $s1, 24($sp)
    .cfi_restore 17
    ld     $s8, 32($sp)
    .cfi_restore 30
    ld     $ra, 40($sp)
    .cfi_restore 31
    daddiu $sp, $sp, 48
    .cfi_adjust_cfa_offset -48

    # a4 = JValue* result
    # a5 = shorty string
    lbu   $t1, 0($a5)           # get result type from shorty
    li    $t2, 68               # put char 'D' into t2
    beq   $t1, $t2, 1f          # branch if result type char == 'D'
    li    $t3, 70               # put char 'F' into t3
    beq   $t1, $t3, 1f          # branch if result type char == 'F'
    sw    $v0, 0($a4)           # store the result
    dsrl  $v1, $v0, 32
    jalr  $zero, $ra
    sw    $v1, 4($a4)           # store the other half of the result
1:
    mfc1  $v0, $f0
    mfhc1 $v1, $f0
    sw    $v0, 0($a4)           # store the result
    jalr  $zero, $ra
    sw    $v1, 4($a4)           # store the other half of the result
END art_quick_invoke_static_stub

    /*
     * Entry from managed code that calls artHandleFillArrayDataFromCode and
     * delivers exception on failure.
     */
    .extern artHandleFillArrayDataFromCode
ENTRY art_quick_handle_fill_data
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case exception allocation triggers GC
    ld      $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal     artHandleFillArrayDataFromCode              # (payload offset, Array*, method, Thread*)
    move    $a3, rSELF                                  # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_handle_fill_data

    /*
     * Entry from managed code that calls artLockObjectFromCode, may block for GC.
     */
    .extern artLockObjectFromCode
ENTRY art_quick_lock_object
    beq     $a0, $zero, .Lart_quick_throw_null_pointer_exception_gp_set
    nop
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME     # save callee saves in case we block
    jal     artLockObjectFromCode         # (Object* obj, Thread*)
    move    $a1, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_lock_object

ENTRY art_quick_lock_object_no_inline
    beq     $a0, $zero, .Lart_quick_throw_null_pointer_exception_gp_set
    nop
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME     # save callee saves in case we block
    jal     artLockObjectFromCode         # (Object* obj, Thread*)
    move    $a1, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_lock_object_no_inline

    /*
     * Entry from managed code that calls artUnlockObjectFromCode and delivers exception on failure.
     */
    .extern artUnlockObjectFromCode
ENTRY art_quick_unlock_object
    beq     $a0, $zero, .Lart_quick_throw_null_pointer_exception_gp_set
    nop
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case exception allocation triggers GC
    jal     artUnlockObjectFromCode    # (Object* obj, Thread*)
    move    $a1, rSELF                 # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_unlock_object

ENTRY art_quick_unlock_object_no_inline
    beq     $a0, $zero, .Lart_quick_throw_null_pointer_exception_gp_set
    nop
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case exception allocation triggers GC
    jal     artUnlockObjectFromCode    # (Object* obj, Thread*)
    move    $a1, rSELF                 # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_unlock_object_no_inline

    /*
     * Entry from managed code that calls artCheckCastFromCode and delivers exception on failure.
     */
    .extern artThrowClassCastException
ENTRY art_quick_check_cast
    daddiu $sp, $sp, -32
    .cfi_adjust_cfa_offset 32
    sd     $ra, 24($sp)
    .cfi_rel_offset 31, 24
    sd     $t9, 16($sp)
    sd     $a1, 8($sp)
    sd     $a0, 0($sp)
    jal    artIsAssignableFromCode
    .cpreturn                       # Restore gp from t8 in branch delay slot.
                                    # t8 may be clobbered in artIsAssignableFromCode.
    beq    $v0, $zero, .Lthrow_class_cast_exception
    ld     $ra, 24($sp)
    jalr   $zero, $ra
    daddiu $sp, $sp, 32
    .cfi_adjust_cfa_offset -32
.Lthrow_class_cast_exception:
    ld     $t9, 16($sp)
    ld     $a1, 8($sp)
    ld     $a0, 0($sp)
    daddiu $sp, $sp, 32
    .cfi_adjust_cfa_offset -32
    SETUP_GP
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    dla  $t9, artThrowClassCastException
    jalr $zero, $t9                 # artThrowClassCastException (Class*, Class*, Thread*)
    move $a2, rSELF                 # pass Thread::Current
END art_quick_check_cast


    /*
     * Restore rReg's value from offset($sp) if rReg is not the same as rExclude.
     * nReg is the register number for rReg.
     */
.macro POP_REG_NE rReg, nReg, offset, rExclude
    .ifnc \rReg, \rExclude
        ld \rReg, \offset($sp)      # restore rReg
        .cfi_restore \nReg
    .endif
.endm

    /*
     * Macro to insert read barrier, only used in art_quick_aput_obj.
     * rObj and rDest are registers, offset is a defined literal such as MIRROR_OBJECT_CLASS_OFFSET.
     * TODO: When read barrier has a fast path, add heap unpoisoning support for the fast path.
     */
.macro READ_BARRIER rDest, rObj, offset
#ifdef USE_READ_BARRIER
    # saved registers used in art_quick_aput_obj: a0-a2, t0-t1, t9, ra. 16B-aligned.
    daddiu  $sp, $sp, -64
    .cfi_adjust_cfa_offset 64
    sd     $ra, 56($sp)
    .cfi_rel_offset 31, 56
    sd     $t9, 48($sp)
    .cfi_rel_offset 25, 48
    sd     $t1, 40($sp)
    .cfi_rel_offset 13, 40
    sd     $t0, 32($sp)
    .cfi_rel_offset 12, 32
    sd     $a2, 16($sp)             # padding slot at offset 24 (padding can be any slot in the 64B)
    .cfi_rel_offset 6, 16
    sd     $a1, 8($sp)
    .cfi_rel_offset 5, 8
    sd     $a0, 0($sp)
    .cfi_rel_offset 4, 0

    # move $a0, \rRef               # pass ref in a0 (no-op for now since parameter ref is unused)
    .ifnc \rObj, $a1
        move $a1, \rObj             # pass rObj
    .endif
    daddiu $a2, $zero, \offset      # pass offset
    jal artReadBarrierSlow          # artReadBarrierSlow(ref, rObj, offset)
    .cpreturn                       # Restore gp from t8 in branch delay slot.
                                    # t8 may be clobbered in artReadBarrierSlow.
    # No need to unpoison return value in v0, artReadBarrierSlow() would do the unpoisoning.
    move \rDest, $v0                # save return value in rDest
                                    # (rDest cannot be v0 in art_quick_aput_obj)

    ld     $a0, 0($sp)              # restore registers except rDest
                                    # (rDest can only be t0 or t1 in art_quick_aput_obj)
    .cfi_restore 4
    ld     $a1, 8($sp)
    .cfi_restore 5
    ld     $a2, 16($sp)
    .cfi_restore 6
    POP_REG_NE $t0, 12, 32, \rDest
    POP_REG_NE $t1, 13, 40, \rDest
    ld     $t9, 48($sp)
    .cfi_restore 25
    ld     $ra, 56($sp)             # restore $ra
    .cfi_restore 31
    daddiu  $sp, $sp, 64
    .cfi_adjust_cfa_offset -64
    SETUP_GP                        # set up gp because we are not returning
#else
    lwu     \rDest, \offset(\rObj)
    UNPOISON_HEAP_REF \rDest
#endif  // USE_READ_BARRIER
.endm

    /*
     * Entry from managed code for array put operations of objects where the value being stored
     * needs to be checked for compatibility.
     * a0 = array, a1 = index, a2 = value
     */
ENTRY art_quick_aput_obj_with_null_and_bound_check
    bne    $a0, $zero, .Lart_quick_aput_obj_with_bound_check_gp_set
    nop
    b .Lart_quick_throw_null_pointer_exception_gp_set
    nop
END art_quick_aput_obj_with_null_and_bound_check

ENTRY art_quick_aput_obj_with_bound_check
    lwu  $t0, MIRROR_ARRAY_LENGTH_OFFSET($a0)
    sltu $t1, $a1, $t0
    bne  $t1, $zero, .Lart_quick_aput_obj_gp_set
    nop
    move $a0, $a1
    b .Lart_quick_throw_array_bounds_gp_set
    move $a1, $t0
END art_quick_aput_obj_with_bound_check

ENTRY art_quick_aput_obj
    beq  $a2, $zero, .Ldo_aput_null
    nop
    READ_BARRIER $t0, $a0, MIRROR_OBJECT_CLASS_OFFSET
    READ_BARRIER $t1, $a2, MIRROR_OBJECT_CLASS_OFFSET
    READ_BARRIER $t0, $t0, MIRROR_CLASS_COMPONENT_TYPE_OFFSET
    bne $t1, $t0, .Lcheck_assignability  # value's type == array's component type - trivial assignability
    nop
.Ldo_aput:
    dsll  $a1, $a1, 2
    daddu $t0, $a0, $a1
    POISON_HEAP_REF $a2
    sw   $a2, MIRROR_OBJECT_ARRAY_DATA_OFFSET($t0)
    ld   $t0, THREAD_CARD_TABLE_OFFSET(rSELF)
    dsrl  $t1, $a0, 7
    daddu $t1, $t1, $t0
    sb   $t0, ($t1)
    jalr $zero, $ra
    .cpreturn                       # Restore gp from t8 in branch delay slot.
.Ldo_aput_null:
    dsll  $a1, $a1, 2
    daddu $t0, $a0, $a1
    sw   $a2, MIRROR_OBJECT_ARRAY_DATA_OFFSET($t0)
    jalr $zero, $ra
    .cpreturn                       # Restore gp from t8 in branch delay slot.
.Lcheck_assignability:
    daddiu $sp, $sp, -64
    .cfi_adjust_cfa_offset 64
    sd     $ra, 56($sp)
    .cfi_rel_offset 31, 56
    sd     $t9, 24($sp)
    sd     $a2, 16($sp)
    sd     $a1, 8($sp)
    sd     $a0, 0($sp)
    move   $a1, $t1
    move   $a0, $t0
    jal    artIsAssignableFromCode  # (Class*, Class*)
    .cpreturn                       # Restore gp from t8 in branch delay slot.
                                    # t8 may be clobbered in artIsAssignableFromCode.
    ld     $ra, 56($sp)
    ld     $t9, 24($sp)
    ld     $a2, 16($sp)
    ld     $a1, 8($sp)
    ld     $a0, 0($sp)
    daddiu $sp, $sp, 64
    .cfi_adjust_cfa_offset -64
    SETUP_GP
    bne    $v0, $zero, .Ldo_aput
    nop
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    move   $a1, $a2
    dla  $t9, artThrowArrayStoreException
    jalr $zero, $t9                 # artThrowArrayStoreException(Class*, Class*, Thread*)
    move   $a2, rSELF               # pass Thread::Current
END art_quick_aput_obj

    /*
     * Called by managed code to resolve a static field and load a boolean primitive value.
     */
    .extern artGetBooleanStaticFromCode
ENTRY art_quick_get_boolean_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetBooleanStaticFromCode   # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_boolean_static

    /*
     * Called by managed code to resolve a static field and load a byte primitive value.
     */
    .extern artGetByteStaticFromCode
ENTRY art_quick_get_byte_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetByteStaticFromCode      # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_byte_static

    /*
     * Called by managed code to resolve a static field and load a char primitive value.
     */
    .extern artGetCharStaticFromCode
ENTRY art_quick_get_char_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetCharStaticFromCode      # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_char_static

    /*
     * Called by managed code to resolve a static field and load a short primitive value.
     */
    .extern artGetShortStaticFromCode
ENTRY art_quick_get_short_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetShortStaticFromCode     # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_short_static

    /*
     * Called by managed code to resolve a static field and load a 32-bit primitive value.
     */
    .extern artGet32StaticFromCode
ENTRY art_quick_get32_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGet32StaticFromCode        # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get32_static

    /*
     * Called by managed code to resolve a static field and load a 64-bit primitive value.
     */
    .extern artGet64StaticFromCode
ENTRY art_quick_get64_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGet64StaticFromCode        # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get64_static

    /*
     * Called by managed code to resolve a static field and load an object reference.
     */
    .extern artGetObjStaticFromCode
ENTRY art_quick_get_obj_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetObjStaticFromCode       # (uint32_t field_idx, const Method* referrer, Thread*)
    move   $a2, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_obj_static

    /*
     * Called by managed code to resolve an instance field and load a boolean primitive value.
     */
    .extern artGetBooleanInstanceFromCode
ENTRY art_quick_get_boolean_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetBooleanInstanceFromCode # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_boolean_instance

    /*
     * Called by managed code to resolve an instance field and load a byte primitive value.
     */
    .extern artGetByteInstanceFromCode
ENTRY art_quick_get_byte_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetByteInstanceFromCode    # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_byte_instance

    /*
     * Called by managed code to resolve an instance field and load a char primitive value.
     */
    .extern artGetCharInstanceFromCode
ENTRY art_quick_get_char_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetCharInstanceFromCode    # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_char_instance

    /*
     * Called by managed code to resolve an instance field and load a short primitive value.
     */
    .extern artGetShortInstanceFromCode
ENTRY art_quick_get_short_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetShortInstanceFromCode   # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_short_instance

    /*
     * Called by managed code to resolve an instance field and load a 32-bit primitive value.
     */
    .extern artGet32InstanceFromCode
ENTRY art_quick_get32_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGet32InstanceFromCode      # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get32_instance

    /*
     * Called by managed code to resolve an instance field and load a 64-bit primitive value.
     */
    .extern artGet64InstanceFromCode
ENTRY art_quick_get64_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGet64InstanceFromCode      # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get64_instance

    /*
     * Called by managed code to resolve an instance field and load an object reference.
     */
    .extern artGetObjInstanceFromCode
ENTRY art_quick_get_obj_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artGetObjInstanceFromCode     # (field_idx, Object*, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_NO_EXCEPTION
END art_quick_get_obj_instance

    /*
     * Called by managed code to resolve a static field and store a 8-bit primitive value.
     */
    .extern artSet8StaticFromCode
ENTRY art_quick_set8_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet8StaticFromCode         # (field_idx, new_val, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set8_static

    /*
     * Called by managed code to resolve a static field and store a 16-bit primitive value.
     */
    .extern artSet16StaticFromCode
ENTRY art_quick_set16_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet16StaticFromCode        # (field_idx, new_val, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set16_static

    /*
     * Called by managed code to resolve a static field and store a 32-bit primitive value.
     */
    .extern artSet32StaticFromCode
ENTRY art_quick_set32_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet32StaticFromCode        # (field_idx, new_val, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set32_static

    /*
     * Called by managed code to resolve a static field and store a 64-bit primitive value.
     */
    .extern artSet64StaticFromCode
ENTRY art_quick_set64_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
                                         # a2 contains the new val
    ld     $a1, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet64StaticFromCode        # (field_idx, referrer, new_val, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set64_static

    /*
     * Called by managed code to resolve a static field and store an object reference.
     */
    .extern artSetObjStaticFromCode
ENTRY art_quick_set_obj_static
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a2, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSetObjStaticFromCode       # (field_idx, new_val, referrer, Thread*)
    move   $a3, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set_obj_static

    /*
     * Called by managed code to resolve an instance field and store a 8-bit primitive value.
     */
    .extern artSet8InstanceFromCode
ENTRY art_quick_set8_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a3, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet8InstanceFromCode       # (field_idx, Object*, new_val, referrer, Thread*)
    move   $a4, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set8_instance

    /*
     * Called by managed code to resolve an instance field and store a 16-bit primitive value.
     */
    .extern artSet16InstanceFromCode
ENTRY art_quick_set16_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a3, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet16InstanceFromCode      # (field_idx, Object*, new_val, referrer, Thread*)
    move   $a4, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set16_instance

    /*
     * Called by managed code to resolve an instance field and store a 32-bit primitive value.
     */
    .extern artSet32InstanceFromCode
ENTRY art_quick_set32_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a3, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet32InstanceFromCode      # (field_idx, Object*, new_val, referrer, Thread*)
    move   $a4, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set32_instance

    /*
     * Called by managed code to resolve an instance field and store a 64-bit primitive value.
     */
    .extern artSet64InstanceFromCode
ENTRY art_quick_set64_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a3, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSet64InstanceFromCode      # (field_idx, Object*, new_val, referrer, Thread*)
    move   $a4, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set64_instance

    /*
     * Called by managed code to resolve an instance field and store an object reference.
     */
    .extern artSetObjInstanceFromCode
ENTRY art_quick_set_obj_instance
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME    # save callee saves in case of GC
    ld     $a3, FRAME_SIZE_REFS_ONLY_CALLEE_SAVE($sp)  # pass referrer's Method*
    jal    artSetObjInstanceFromCode     # (field_idx, Object*, new_val, referrer, Thread*)
    move   $a4, rSELF                    # pass Thread::Current
    RETURN_IF_ZERO
END art_quick_set_obj_instance

// Macro to facilitate adding new allocation entrypoints.
.macro ONE_ARG_DOWNCALL name, entrypoint, return
    .extern \entrypoint
ENTRY \name
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case of GC
    jal     \entrypoint
    move    $a1, rSELF                 # pass Thread::Current
    \return
END \name
.endm

// Macro to facilitate adding new allocation entrypoints.
.macro TWO_ARG_DOWNCALL name, entrypoint, return
    .extern \entrypoint
ENTRY \name
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case of GC
    jal     \entrypoint
    move    $a2, rSELF                 # pass Thread::Current
    \return
END \name
.endm

.macro THREE_ARG_DOWNCALL name, entrypoint, return
    .extern \entrypoint
ENTRY \name
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case of GC
    jal     \entrypoint
    move    $a3, rSELF                 # pass Thread::Current
    \return
END \name
.endm

.macro FOUR_ARG_DOWNCALL name, entrypoint, return
    .extern \entrypoint
ENTRY \name
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME  # save callee saves in case of GC
    jal     \entrypoint
    move    $a4, rSELF                 # pass Thread::Current
    \return
END \name
.endm

// Generate the allocation entrypoints for each allocator.
GENERATE_ALLOC_ENTRYPOINTS_FOR_EACH_ALLOCATOR

// A hand-written override for GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT(_rosalloc, RosAlloc).
ENTRY art_quick_alloc_object_rosalloc

    # Fast path rosalloc allocation
    # a0: type_idx
    # a1: ArtMethod*
    # s1: Thread::Current
    # -----------------------------
    # t0: class
    # t1: object size
    # t2: rosalloc run
    # t3: thread stack top offset
    # a4: thread stack bottom offset
    # v0: free list head
    #
    # a5, a6 : temps

    ld     $t0, ART_METHOD_DEX_CACHE_TYPES_OFFSET_64($a1)   # Load dex cache resolved types array.

    dsll   $a5, $a0, COMPRESSED_REFERENCE_SIZE_SHIFT        # Shift the value.
    daddu  $a5, $t0, $a5                                    # Compute the index.
    lwu    $t0, 0($a5)                                      # Load class (t0).
    beqzc  $t0, .Lart_quick_alloc_object_rosalloc_slow_path

    li     $a6, MIRROR_CLASS_STATUS_INITIALIZED
    lwu    $a5, MIRROR_CLASS_STATUS_OFFSET($t0)             # Check class status.
    bnec   $a5, $a6, .Lart_quick_alloc_object_rosalloc_slow_path

    # Add a fake dependence from the following access flag and size loads to the status load. This
    # is to prevent those loads from being reordered above the status load and reading wrong values.
    xor    $a5, $a5, $a5
    daddu  $t0, $t0, $a5

    lwu    $a5, MIRROR_CLASS_ACCESS_FLAGS_OFFSET($t0)       # Check if access flags has
    li     $a6, ACCESS_FLAGS_CLASS_IS_FINALIZABLE           # kAccClassIsFinalizable.
    and    $a6, $a5, $a6
    bnezc  $a6, .Lart_quick_alloc_object_rosalloc_slow_path

    ld     $t3, THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET($s1)    # Check if thread local allocation stack
    ld     $a4, THREAD_LOCAL_ALLOC_STACK_END_OFFSET($s1)    # has any room left.
    bgeuc  $t3, $a4, .Lart_quick_alloc_object_rosalloc_slow_path

    lwu    $t1, MIRROR_CLASS_OBJECT_SIZE_OFFSET($t0)        # Load object size (t1).
    li     $a5, ROSALLOC_MAX_THREAD_LOCAL_BRACKET_SIZE      # Check if size is for a thread local
                                                            # allocation.
    bltuc  $a5, $t1, .Lart_quick_alloc_object_rosalloc_slow_path

    # Compute the rosalloc bracket index from the size. Allign up the size by the rosalloc bracket
    # quantum size and divide by the quantum size and subtract by 1.
    daddiu $t1, $t1, -1                                     # Decrease obj size and shift right by
    dsrl   $t1, $t1, ROSALLOC_BRACKET_QUANTUM_SIZE_SHIFT    # quantum.

    dsll   $t2, $t1, POINTER_SIZE_SHIFT
    daddu  $t2, $t2, $s1
    ld     $t2, THREAD_ROSALLOC_RUNS_OFFSET($t2)            # Load rosalloc run (t2).

    # Load the free list head (v0).
    # NOTE: this will be the return val.
    ld     $v0, (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)($t2)
    beqzc  $v0, .Lart_quick_alloc_object_rosalloc_slow_path

    # Load the next pointer of the head and update the list head with the next pointer.
    ld     $a5, ROSALLOC_SLOT_NEXT_OFFSET($v0)
    sd     $a5, (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)($t2)

    # Store the class pointer in the header. This also overwrites the first pointer. The offsets are
    # asserted to match.

#if ROSALLOC_SLOT_NEXT_OFFSET != MIRROR_OBJECT_CLASS_OFFSET
#error "Class pointer needs to overwrite next pointer."
#endif

    POISON_HEAP_REF $t0
    sw     $t0, MIRROR_OBJECT_CLASS_OFFSET($v0)

    # Push the new object onto the thread local allocation stack and increment the thread local
    # allocation stack top.
    sd     $v0, 0($t3)
    daddiu $t3, $t3, COMPRESSED_REFERENCE_SIZE
    sd     $t3, THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET($s1)

    # Decrement the size of the free list.
    lw     $a5, (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_SIZE_OFFSET)($t2)
    addiu  $a5, $a5, -1
    sw     $a5, (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_SIZE_OFFSET)($t2)

    sync                                         # Fence.

    jalr   $zero, $ra
    .cpreturn                                    # Restore gp from t8 in branch delay slot.

.Lart_quick_alloc_object_rosalloc_slow_path:
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME
    jal    artAllocObjectFromCodeRosAlloc
    move   $a2 ,$s1                              # Pass self as argument.
    RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER

END art_quick_alloc_object_rosalloc

GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT(_region_tlab, RegionTLAB)

    /*
     * Entry from managed code to resolve a string, this stub will allocate a String and deliver an
     * exception on error. On success the String is returned. A0 holds the string index. The fast
     * path check for hit in strings cache has already been performed.
     */
ONE_ARG_DOWNCALL art_quick_resolve_string, artResolveStringFromCode, RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER

    /*
     * Entry from managed code when uninitialized static storage, this stub will run the class
     * initializer and deliver the exception on error. On success the static storage base is
     * returned.
     */
ONE_ARG_DOWNCALL art_quick_initialize_static_storage, artInitializeStaticStorageFromCode, RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER

    /*
     * Entry from managed code when dex cache misses for a type_idx.
     */
ONE_ARG_DOWNCALL art_quick_initialize_type, artInitializeTypeFromCode, RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER

    /*
     * Entry from managed code when type_idx needs to be checked for access and dex cache may also
     * miss.
     */
ONE_ARG_DOWNCALL art_quick_initialize_type_and_verify_access, artInitializeTypeAndVerifyAccessFromCode, RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER

    /*
     * Called by managed code when the value in rSUSPEND has been decremented to 0.
     */
    .extern artTestSuspendFromCode
ENTRY art_quick_test_suspend
    lh     $a0, THREAD_FLAGS_OFFSET(rSELF)
    bne    $a0, $zero, 1f
    daddiu rSUSPEND, $zero, SUSPEND_CHECK_INTERVAL   # reset rSUSPEND to SUSPEND_CHECK_INTERVAL
    jalr   $zero, $ra
    .cpreturn                                 # Restore gp from t8 in branch delay slot.
1:
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME         # save callee saves for stack crawl
    jal    artTestSuspendFromCode             # (Thread*)
    move   $a0, rSELF
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME_AND_RETURN
END art_quick_test_suspend

    /*
     * Called by managed code that is attempting to call a method on a proxy class. On entry
     * r0 holds the proxy method; r1, r2 and r3 may contain arguments.
     */
    .extern artQuickProxyInvokeHandler
ENTRY art_quick_proxy_invoke_handler
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_WITH_METHOD_IN_A0
    move    $a2, rSELF             # pass Thread::Current
    jal     artQuickProxyInvokeHandler  # (Method* proxy method, receiver, Thread*, SP)
    move    $a3, $sp               # pass $sp
    ld      $t0, THREAD_EXCEPTION_OFFSET(rSELF) # load Thread::Current()->exception_
    daddiu  $sp, $sp, REFS_AND_ARGS_MINUS_REFS_SIZE  # skip a0-a7 and f12-f19
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    bne     $t0, $zero, 1f
    dmtc1   $v0, $f0               # place return value to FP return value
    jalr    $zero, $ra
    dmtc1   $v1, $f1               # place return value to FP return value
1:
    DELIVER_PENDING_EXCEPTION
END art_quick_proxy_invoke_handler

    /*
     * Called to resolve an imt conflict.
     * a0 is the conflict ArtMethod.
     * t0 is a hidden argument that holds the target interface method's dex method index.
     *
     * Mote that this stub writes to a0, t0 and t1.
     */
ENTRY art_quick_imt_conflict_trampoline
    ld      $t1, 0($sp)                                      # Load referrer.
    ld      $t1, ART_METHOD_DEX_CACHE_METHODS_OFFSET_64($t1) # Load dex cache methods array.
    dsll    $t0, $t0, POINTER_SIZE_SHIFT                     # Calculate offset.
    daddu   $t0, $t1, $t0                                    # Add offset to base.
    ld      $t0, 0($t0)                                      # Load interface method.
    ld      $a0, ART_METHOD_JNI_OFFSET_64($a0)               # Load ImtConflictTable.

.Limt_table_iterate:
    ld      $t1, 0($a0)                                      # Load next entry in ImtConflictTable.
    # Branch if found.
    beq     $t1, $t0, .Limt_table_found
    nop
    # If the entry is null, the interface method is not in the ImtConflictTable.
    beqzc   $t1, .Lconflict_trampoline
    # Iterate over the entries of the ImtConflictTable.
    daddiu  $a0, $a0, 2 * __SIZEOF_POINTER__                 # Iterate to the next entry.
    bc       .Limt_table_iterate

.Limt_table_found:
    # We successfully hit an entry in the table. Load the target method and jump to it.
    ld      $a0, __SIZEOF_POINTER__($a0)
    ld      $t9, ART_METHOD_QUICK_CODE_OFFSET_64($a0)
    jr      $t9
    .cpreturn                      # Restore gp from t8 in branch delay slot.

.Lconflict_trampoline:
    # Call the runtime stub to populate the ImtConflictTable and jump to the resolved method.
    INVOKE_TRAMPOLINE_BODY artInvokeInterfaceTrampoline
END art_quick_imt_conflict_trampoline

    .extern artQuickResolutionTrampoline
ENTRY art_quick_resolution_trampoline
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    move    $a2, rSELF             # pass Thread::Current
    jal     artQuickResolutionTrampoline  # (Method* called, receiver, Thread*, SP)
    move    $a3, $sp               # pass $sp
    beq     $v0, $zero, 1f
    ld      $a0, 0($sp)            # load resolved method in $a0
                                   # artQuickResolutionTrampoline puts resolved method in *SP
    RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    move    $t9, $v0               # code pointer must be in $t9 to generate the global pointer
    jalr    $zero, $t9             # tail call to method
    nop
1:
    RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    DELIVER_PENDING_EXCEPTION
END art_quick_resolution_trampoline

    .extern artQuickGenericJniTrampoline
    .extern artQuickGenericJniEndTrampoline
ENTRY art_quick_generic_jni_trampoline
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_WITH_METHOD_IN_A0
    move    $s8, $sp               # save $sp

    # prepare for call to artQuickGenericJniTrampoline(Thread*, SP)
    move    $a0, rSELF             # pass Thread::Current
    move    $a1, $sp               # pass $sp
    jal     artQuickGenericJniTrampoline   # (Thread*, SP)
    daddiu  $sp, $sp, -5120        # reserve space on the stack

    # The C call will have registered the complete save-frame on success.
    # The result of the call is:
    # v0: ptr to native code, 0 on error.
    # v1: ptr to the bottom of the used area of the alloca, can restore stack till here.
    beq     $v0, $zero, 1f         # check entry error
    move    $t9, $v0               # save the code ptr
    move    $sp, $v1               # release part of the alloca

    # Load parameters from stack into registers
    ld      $a0,   0($sp)
    ld      $a1,   8($sp)
    ld      $a2,  16($sp)
    ld      $a3,  24($sp)
    ld      $a4,  32($sp)
    ld      $a5,  40($sp)
    ld      $a6,  48($sp)
    ld      $a7,  56($sp)
    # Load FPRs the same as GPRs. Look at BuildNativeCallFrameStateMachine.
    l.d     $f12,  0($sp)
    l.d     $f13,  8($sp)
    l.d     $f14, 16($sp)
    l.d     $f15, 24($sp)
    l.d     $f16, 32($sp)
    l.d     $f17, 40($sp)
    l.d     $f18, 48($sp)
    l.d     $f19, 56($sp)
    jalr    $t9                    # native call
    daddiu  $sp, $sp, 64

    # result sign extension is handled in C code
    # prepare for call to artQuickGenericJniEndTrampoline(Thread*, result, result_f)
    move    $a0, rSELF             # pass Thread::Current
    move    $a1, $v0
    jal     artQuickGenericJniEndTrampoline
    dmfc1   $a2, $f0

    ld      $t0, THREAD_EXCEPTION_OFFSET(rSELF) # load Thread::Current()->exception_
    bne     $t0, $zero, 1f         # check for pending exceptions
    move    $sp, $s8               # tear down the alloca

    # tear dpown the callee-save frame
    RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME

    jalr    $zero, $ra
    dmtc1   $v0, $f0               # place return value to FP return value

1:
    ld      $sp, THREAD_TOP_QUICK_FRAME_OFFSET(rSELF)
    # This will create a new save-all frame, required by the runtime.
    DELIVER_PENDING_EXCEPTION
END art_quick_generic_jni_trampoline

    .extern artQuickToInterpreterBridge
ENTRY art_quick_to_interpreter_bridge
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    move    $a1, rSELF             # pass Thread::Current
    jal     artQuickToInterpreterBridge    # (Method* method, Thread*, SP)
    move    $a2, $sp               # pass $sp
    ld      $t0, THREAD_EXCEPTION_OFFSET(rSELF) # load Thread::Current()->exception_
    daddiu  $sp, $sp, REFS_AND_ARGS_MINUS_REFS_SIZE  # skip a0-a7 and f12-f19
    RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
    bne     $t0, $zero, 1f
    dmtc1   $v0, $f0               # place return value to FP return value
    jalr    $zero, $ra
    dmtc1   $v1, $f1               # place return value to FP return value
1:
    DELIVER_PENDING_EXCEPTION
END art_quick_to_interpreter_bridge

    /*
     * Routine that intercepts method calls and returns.
     */
    .extern artInstrumentationMethodEntryFromCode
    .extern artInstrumentationMethodExitFromCode
ENTRY art_quick_instrumentation_entry
    SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    daddiu   $sp, $sp, -16     # space for saving arg0
    .cfi_adjust_cfa_offset 16
    sd       $a0, 0($sp)       # save arg0
    move     $a3, $ra          # pass $ra
    jal      artInstrumentationMethodEntryFromCode  # (Method*, Object*, Thread*, RA)
    move     $a2, rSELF        # pass Thread::Current
    move     $t9, $v0          # $t9 holds reference to code
    ld       $a0, 0($sp)       # restore arg0
    daddiu   $sp, $sp, 16      # remove args
    .cfi_adjust_cfa_offset -16
    RESTORE_REFS_AND_ARGS_CALLEE_SAVE_FRAME
    jalr     $t9               # call method
    nop
END art_quick_instrumentation_entry
    /* intentional fallthrough */
    .global art_quick_instrumentation_exit
art_quick_instrumentation_exit:
    .cfi_startproc
    SETUP_GP
    move     $ra, $zero        # link register is to here, so clobber with 0 for later checks
    SETUP_REFS_ONLY_CALLEE_SAVE_FRAME
    move     $t0, $sp          # remember bottom of caller's frame
    daddiu   $sp, $sp, -16     # save return values and set up args
    .cfi_adjust_cfa_offset 16
    sd       $v0, 0($sp)
    .cfi_rel_offset 2, 0
    s.d      $f0, 8($sp)
    mov.d    $f15, $f0         # pass fpr result
    move     $a2, $v0          # pass gpr result
    move     $a1, $t0          # pass $sp
    move     $a0, rSELF        # pass Thread::Current
    jal      artInstrumentationMethodExitFromCode  # (Thread*, SP, gpr_res, fpr_res)
    .cpreturn                  # Restore gp from t8 in branch delay slot. gp is not used anymore,
                               # and t8 may be clobbered in artInstrumentationMethodExitFromCode.

    move     $t9, $v0          # set aside returned link register
    move     $ra, $v1          # set link register for deoptimization
    ld       $v0, 0($sp)       # restore return values
    l.d      $f0, 8($sp)
    jalr     $zero, $t9        # return
    daddiu   $sp, $sp, 16+FRAME_SIZE_REFS_ONLY_CALLEE_SAVE  # 16 bytes of saved values + ref_only callee save frame
    .cfi_adjust_cfa_offset -(16+FRAME_SIZE_REFS_ONLY_CALLEE_SAVE)
END art_quick_instrumentation_exit

    /*
     * Instrumentation has requested that we deoptimize into the interpreter. The deoptimization
     * will long jump to the upcall with a special exception of -1.
     */
    .extern artDeoptimize
    .extern artEnterInterpreterFromDeoptimize
ENTRY art_quick_deoptimize
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    jal      artDeoptimize     # artDeoptimize(Thread*, SP)
                               # Returns caller method's frame size.
    move     $a0, rSELF        # pass Thread::current
END art_quick_deoptimize

    /*
     * Compiled code has requested that we deoptimize into the interpreter. The deoptimization
     * will long jump to the upcall with a special exception of -1.
     */
    .extern artDeoptimizeFromCompiledCode
ENTRY art_quick_deoptimize_from_compiled_code
    SETUP_SAVE_ALL_CALLEE_SAVE_FRAME
    jal      artDeoptimizeFromCompiledCode    # artDeoptimizeFromCompiledCode(Thread*, SP)
                                              # Returns caller method's frame size.
    move     $a0, rSELF                       # pass Thread::current
END art_quick_deoptimize_from_compiled_code

  .set push
  .set noat
/* java.lang.String.compareTo(String anotherString) */
ENTRY_NO_GP art_quick_string_compareto
/* $a0 holds address of "this" */
/* $a1 holds address of "anotherString" */
  beq    $a0,$a1,9f     # this and anotherString are the same object
  move   $v0,$zero

  lw     $a2,MIRROR_STRING_COUNT_OFFSET($a0)    # this.length()
  lw     $a3,MIRROR_STRING_COUNT_OFFSET($a1)    # anotherString.length()
  MINu   $t2, $a2, $a3
# $t2 now holds min(this.length(),anotherString.length())

  beqz   $t2,9f         # while min(this.length(),anotherString.length())-i != 0
  subu   $v0,$a2,$a3    # if $t2==0 return
                        #     (this.length() - anotherString.length())
1:
  lhu    $t0,MIRROR_STRING_VALUE_OFFSET($a0)    # while this.charAt(i) == anotherString.charAt(i)
  lhu    $t1,MIRROR_STRING_VALUE_OFFSET($a1)
  bne    $t0,$t1,9f     # if this.charAt(i) != anotherString.charAt(i)
  subu   $v0,$t0,$t1    #     return (this.charAt(i) - anotherString.charAt(i))
  daddiu $a0,$a0,2      # point at this.charAt(i++)
  subu   $t2,$t2,1      # new value of
                        # min(this.length(),anotherString.length())-i
  bnez   $t2,1b
  daddiu $a1,$a1,2      # point at anotherString.charAt(i++)
  subu   $v0,$a2,$a3

9:
  j      $ra
  nop
END art_quick_string_compareto

/* java.lang.String.indexOf(int ch, int fromIndex=0) */
ENTRY_NO_GP art_quick_indexof
/* $a0 holds address of "this" */
/* $a1 holds "ch" */
/* $a2 holds "fromIndex" */
  lw    $t0,MIRROR_STRING_COUNT_OFFSET($a0)     # this.length()
  slt   $at, $a2, $zero # if fromIndex < 0
  seleqz $a2, $a2, $at  #     fromIndex = 0;
  subu  $t0,$t0,$a2     # this.length() - fromIndex
  blez  $t0,6f          # if this.length()-fromIndex <= 0
  li    $v0,-1          #     return -1;

  sll   $v0,$a2,1       # $a0 += $a2 * 2
  daddu $a0,$a0,$v0     #  "  "   "  " "
  move  $v0,$a2         # Set i to fromIndex.

1:
  lhu   $t3,MIRROR_STRING_VALUE_OFFSET($a0)     # if this.charAt(i) == ch
  beq   $t3,$a1,6f                              #     return i;
  daddu $a0,$a0,2       # i++
  subu  $t0,$t0,1       # this.length() - i
  bnez  $t0,1b          # while this.length() - i > 0
  addu  $v0,$v0,1       # i++

  li    $v0,-1          # if this.length() - i <= 0
                        #     return -1;

6:
  j     $ra
  nop
END art_quick_indexof

  .set pop