// z_AIX_asm.S: - microtasking routines specifically
// written for Power platforms running AIX OS
//
////===----------------------------------------------------------------------===//
////
//// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
//// See https://llvm.org/LICENSE.txt for license information.
//// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
////
////===----------------------------------------------------------------------===//
//
// -----------------------------------------------------------------------
// macros
// -----------------------------------------------------------------------
#include "kmp_config.h"
#if KMP_OS_AIX
//------------------------------------------------------------------------
// int
// __kmp_invoke_microtask( void (*pkfn) (int *gtid, int *tid, ...),
// int gtid, int tid,
// int argc, void *p_argv[]
// #if OMPT_SUPPORT
// ,
// void **exit_frame_ptr
// #endif
// ) {
// #if OMPT_SUPPORT
// *exit_frame_ptr = OMPT_GET_FRAME_ADDRESS(0);
// #endif
//
// (*pkfn)( & gtid, & tid, p_argv[0], ... );
//
// // FIXME: This is done at call-site and can be removed here.
// #if OMPT_SUPPORT
// *exit_frame_ptr = 0;
// #endif
//
// return 1;
// }
//
// parameters:
// r3: pkfn
// r4: gtid
// r5: tid
// r6: argc
// r7: p_argv
// r8: &exit_frame
//
// return: r3 (always 1/TRUE)
//
#if KMP_ARCH_PPC64_XCOFF
.globl __kmp_invoke_microtask[DS]
.globl .__kmp_invoke_microtask
.align 4
.csect __kmp_invoke_microtask[DS],3
.vbyte 8, .__kmp_invoke_microtask
.vbyte 8, TOC[TC0]
.vbyte 8, 0
.csect .text[PR],2
.machine "pwr7"
.__kmp_invoke_microtask:
// -- Begin __kmp_invoke_microtask
// mark_begin;
// We need to allocate a stack frame large enough to hold all of the parameters
// on the stack for the microtask plus what this function needs. That's 48
// bytes under the XCOFF64 ABI, plus max(64, 8*(2 + argc)) for
// the parameters to the microtask (gtid, tid, argc elements of p_argv),
// plus 8 bytes to store the values of r4 and r5, and 8 bytes to store r31.
// With OMP-T support, we need an additional 8 bytes to save r30 to hold
// a copy of r8.
// Stack offsets relative to stack pointer:
// r31: -8, r30: -16, gtid: -20, tid: -24
mflr 0
std 31, -8(1) # Save r31 to the stack
std 0, 16(1) # Save LR to the linkage area
// This is unusual because normally we'd set r31 equal to r1 after the stack
// frame is established. In this case, however, we need to dynamically compute
// the stack frame size, and so we keep a direct copy of r1 to access our
// register save areas and restore the r1 value before returning.
mr 31, 1
// Compute the size of the "argc" portion of the parameter save area.
// The parameter save area is always at least 64 bytes long (i.e. 8 regs)
// The microtask has (2 + argc) parameters, so if argc <= 6, we need to
// to allocate 8*6 bytes, not 8*argc.
li 0, 6
cmpwi 0, 6, 6
iselgt 0, 6, 0 # r0 = (argc > 6)? argc : 6
sldi 0, 0, 3 # r0 = 8 * max(argc, 6)
// Compute the size necessary for the local stack frame.
// 88 = 48 + 4 (for r4) + 4 (for r5) + 8 (for r31) + 8 (for OMP-T r30) +
// 8 (parameter gtid) + 8 (parameter tid)
li 12, 88
add 12, 0, 12
neg 12, 12
// We need to make sure that the stack frame stays aligned (to 16 bytes).
li 0, -16
and 12, 0, 12
// Establish the local stack frame.
stdux 1, 1, 12
#if OMPT_SUPPORT
std 30, -16(31) # Save r30 to the stack
std 1, 0(8)
mr 30, 8
#endif
// Store gtid and tid to the stack because they're passed by reference to the microtask.
stw 4, -20(31) # Save gtid to the stack
stw 5, -24(31) # Save tid to the stack
mr 12, 6 # r12 = argc
mr 4, 7 # r4 = p_argv
cmpwi 0, 12, 1
blt 0, .Lcall # if (argc < 1) goto .Lcall
ld 5, 0(4) # r5 = p_argv[0]
cmpwi 0, 12, 2
blt 0, .Lcall # if (argc < 2) goto .Lcall
ld 6, 8(4) # r6 = p_argv[1]
cmpwi 0, 12, 3
blt 0, .Lcall # if (argc < 3) goto .Lcall
ld 7, 16(4) # r7 = p_argv[2]
cmpwi 0, 12, 4
blt 0, .Lcall # if (argc < 4) goto .Lcall
ld 8, 24(4) # r8 = p_argv[3]
cmpwi 0, 12, 5
blt 0, .Lcall # if (argc < 5) goto .Lcall
ld 9, 32(4) # r9 = p_argv[4]
cmpwi 0, 12, 6
blt 0, .Lcall # if (argc < 6) goto .Lcall
ld 10, 40(4) # r10 = p_argv[5]
cmpwi 0, 12, 7
blt 0, .Lcall # if (argc < 7) goto .Lcall
// There are more than 6 microtask parameters, so we need to store the
// remainder to the stack.
addi 12, 12, -6 # argc -= 6
mtctr 12
// These are set to 8 bytes before the first desired store address (we're using
// pre-increment loads and stores in the loop below). The parameter save area
// for the microtask begins 48 + 8*8 == 112 bytes above r1 for XCOFF64.
addi 4, 4, 40 # p_argv = p_argv + 5
# (i.e. skip the 5 elements we already processed)
addi 12, 1, 104 # r12 = stack offset (112 - 8)
.Lnext:
ldu 0, 8(4)
stdu 0, 8(12)
bdnz .Lnext
.Lcall:
std 2, 40(1) # Save the TOC pointer to the linkage area
// Load the actual function address from the function descriptor.
ld 12, 0(3) # Function address
ld 2, 8(3) # TOC pointer
ld 11, 16(3) # Environment pointer
addi 3, 31, -20 # r3 = >id
addi 4, 31, -24 # r4 = &tid
mtctr 12 # CTR = function address
bctrl # Branch to CTR
ld 2, 40(1) # Restore TOC pointer from linkage area
#if OMPT_SUPPORT
li 3, 0
std 3, 0(30)
#endif
li 3, 1
#if OMPT_SUPPORT
ld 30, -16(31) # Restore r30 from the saved value on the stack
#endif
mr 1, 31
ld 31, -8(1) # Restore r31 from the saved value on the stack
ld 0, 16(1)
mtlr 0 # Restore LR from the linkage area
blr # Branch to LR
#else // KMP_ARCH_PPC_XCOFF
.globl __kmp_invoke_microtask[DS]
.globl .__kmp_invoke_microtask
.align 4
.csect __kmp_invoke_microtask[DS],2
.vbyte 4, .__kmp_invoke_microtask
.vbyte 4, TOC[TC0]
.vbyte 4, 0
.csect .text[PR],2
.machine "pwr7"
.__kmp_invoke_microtask:
// -- Begin __kmp_invoke_microtask
// mark_begin;
// We need to allocate a stack frame large enough to hold all of the parameters
// on the stack for the microtask plus what this function needs. That's 24
// bytes under the XCOFF ABI, plus max(32, 8*(2 + argc)) for
// the parameters to the microtask (gtid, tid, argc elements of p_argv),
// plus 8 bytes to store the values of r4 and r5, and 4 bytes to store r31.
// With OMP-T support, we need an additional 4 bytes to save r30 to hold
// a copy of r8.
// Stack offsets relative to stack pointer:
// r31: -4, r30: -8, gtid: -12, tid: -16
mflr 0
stw 31, -4(1) # Save r31 to the stack
stw 0, 8(1) # Save LR to the linkage area
// This is unusual because normally we'd set r31 equal to r1 after the stack
// frame is established. In this case, however, we need to dynamically compute
// the stack frame size, and so we keep a direct copy of r1 to access our
// register save areas and restore the r1 value before returning.
mr 31, 1
// Compute the size of the "argc" portion of the parameter save area.
// The parameter save area is always at least 32 bytes long (i.e. 8 regs)
// The microtask has (2 + argc) parameters, so if argc <= 6, we need to
// to allocate 4*6 bytes, not 4*argc.
li 0, 6
cmpwi 0, 6, 6
iselgt 0, 6, 0 # r0 = (argc > 6)? argc : 6
slwi 0, 0, 2 # r0 = 4 * max(argc, 6)
// Compute the size necessary for the local stack frame.
// 56 = 32 + 4 (for r4) + 4 (for r5) + 4 (for r31) + 4 (for OMP-T r30) +
// 4 (parameter gtid) + 4 (parameter tid)
li 12, 56
add 12, 0, 12
neg 12, 12
// We need to make sure that the stack frame stays aligned (to 16 bytes).
li 0, -16
and 12, 0, 12
// Establish the local stack frame.
stwux 1, 1, 12
#if OMPT_SUPPORT
stw 30, -8(31) # Save r30 to the stack
stw 1, 0(8)
mr 30, 8
#endif
// Store gtid and tid to the stack because they're passed by reference to the microtask.
stw 4, -12(31) # Save gtid to the stack
stw 5, -16(31) # Save tid to the stack
mr 12, 6 # r12 = argc
mr 4, 7 # r4 = p_argv
cmpwi 0, 12, 1
blt 0, .Lcall # if (argc < 1) goto .Lcall
lwz 5, 0(4) # r5 = p_argv[0]
cmpwi 0, 12, 2
blt 0, .Lcall # if (argc < 2) goto .Lcall
lwz 6, 4(4) # r6 = p_argv[1]
cmpwi 0, 12, 3
blt 0, .Lcall # if (argc < 3) goto .Lcall
lwz 7, 8(4) # r7 = p_argv[2]
cmpwi 0, 12, 4
blt 0, .Lcall # if (argc < 4) goto .Lcall
lwz 8, 12(4) # r8 = p_argv[3]
cmpwi 0, 12, 5
blt 0, .Lcall # if (argc < 5) goto .Lcall
lwz 9, 16(4) # r9 = p_argv[4]
cmpwi 0, 12, 6
blt 0, .Lcall # if (argc < 6) goto .Lcall
lwz 10, 20(4) # r10 = p_argv[5]
cmpwi 0, 12, 7
blt 0, .Lcall # if (argc < 7) goto .Lcall
// There are more than 6 microtask parameters, so we need to store the
// remainder to the stack.
addi 12, 12, -6 # argc -= 6
mtctr 12
// These are set to 4 bytes before the first desired store address (we're using
// pre-increment loads and stores in the loop below). The parameter save area
// for the microtask begins 24 + 4*8 == 56 bytes above r1 for XCOFF.
addi 4, 4, 20 # p_argv = p_argv + 5
# (i.e. skip the 5 elements we already processed)
addi 12, 1, 52 # r12 = stack offset (56 - 4)
.Lnext:
lwzu 0, 4(4)
stwu 0, 4(12)
bdnz .Lnext
.Lcall:
stw 2, 20(1) # Save the TOC pointer to the linkage area
// Load the actual function address from the function descriptor.
lwz 12, 0(3) # Function address
lwz 2, 4(3) # TOC pointer
lwz 11, 8(3) # Environment pointer
addi 3, 31, -12 # r3 = >id
addi 4, 31, -16 # r4 = &tid
mtctr 12 # CTR = function address
bctrl # Branch to CTR
lwz 2, 20(1) # Restore TOC pointer from linkage area
#if OMPT_SUPPORT
li 3, 0
stw 3, 0(30)
#endif
li 3, 1
#if OMPT_SUPPORT
lwz 30, -8(31) # Restore r30 from the saved value on the stack
#endif
mr 1, 31
lwz 31, -4(1) # Restore r31 from the saved value on the stack
lwz 0, 8(1)
mtlr 0 # Restore LR from the linkage area
blr # Branch to LR
#endif // KMP_ARCH_PPC64_XCOFF
.Lfunc_end0:
.vbyte 4, 0x00000000 # Traceback table begin
.byte 0x00 # Version = 0
.byte 0x09 # Language = CPlusPlus
.byte 0x20 # -IsGlobaLinkage, -IsOutOfLineEpilogOrPrologue
# +HasTraceBackTableOffset, -IsInternalProcedure
# -HasControlledStorage, -IsTOCless
# -IsFloatingPointPresent
# -IsFloatingPointOperationLogOrAbortEnabled
.byte 0x61 # -IsInterruptHandler, +IsFunctionNamePresent, +IsAllocaUsed
# OnConditionDirective = 0, -IsCRSaved, +IsLRSaved
.byte 0x80 # +IsBackChainStored, -IsFixup, NumOfFPRsSaved = 0
#if OMPT_SUPPORT
.byte 0x02 # -HasExtensionTable, -HasVectorInfo, NumOfGPRsSaved = 2
.byte 0x06 # NumberOfFixedParms = 6
#else
.byte 0x01 # -HasExtensionTable, -HasVectorInfo, NumOfGPRsSaved = 1
.byte 0x05 # NumberOfFixedParms = 5
#endif
.byte 0x01 # NumberOfFPParms = 0, +HasParmsOnStack
.vbyte 4, 0x00000000 # Parameter type = i, i, i, i, i
.vbyte 4, .Lfunc_end0-.__kmp_invoke_microtask # Function size
.vbyte 2, 0x0016 # Function name len = 22
.byte "__kmp_invoke_microtask" # Function Name
.byte 0x1f # AllocaRegister = 31
# -- End function
// -- End __kmp_invoke_microtask
// Support for unnamed common blocks.
.comm .gomp_critical_user_, 32, 3
#if KMP_ARCH_PPC64_XCOFF
.csect __kmp_unnamed_critical_addr[RW],3
#else
.csect __kmp_unnamed_critical_addr[RW],2
#endif
.globl __kmp_unnamed_critical_addr[RW]
.ptr .gomp_critical_user_
// -- End unnamed common block
.toc
#endif // KMP_OS_AIX
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