//===----------------------Hexagon builtin routine ------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// Functions that implement common sequences in function prologues and epilogues
// used to save code size
.macro FUNCTION_BEGIN name
.p2align 2
.section .text.\name,"ax",@progbits
.globl \name
.type \name, @function
\name:
.endm
.macro FUNCTION_END name
.size \name, . - \name
.endm
.macro FALLTHROUGH_TAIL_CALL name0 name1
.p2align 2
.size \name0, . - \name0
.globl \name1
.type \name1, @function
\name1:
.endm
// Save r17:16 at fp+#-8, r19:18 at fp+#-16, r21:20 at fp+#-24, r23:22 at
// fp+#-32, r25:24 at fp+#-40, and r27:26 at fp+#-48.
// The compiler knows that the __save_* functions clobber LR. No other
// registers should be used without informing the compiler.
FUNCTION_BEGIN __save_r16_through_r27
{
memd(fp+#-48) = r27:26
memd(fp+#-40) = r25:24
}
{
memd(fp+#-32) = r23:22
memd(fp+#-24) = r21:20
}
{
memd(fp+#-16) = r19:18
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r27
FUNCTION_BEGIN __save_r16_through_r25
{
memd(fp+#-40) = r25:24
memd(fp+#-32) = r23:22
}
{
memd(fp+#-24) = r21:20
memd(fp+#-16) = r19:18
}
{
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r25
FUNCTION_BEGIN __save_r16_through_r23
{
memd(fp+#-32) = r23:22
memd(fp+#-24) = r21:20
}
{
memd(fp+#-16) = r19:18
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r23
FUNCTION_BEGIN __save_r16_through_r21
{
memd(fp+#-24) = r21:20
memd(fp+#-16) = r19:18
}
{
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r21
FUNCTION_BEGIN __save_r16_through_r19
{
memd(fp+#-16) = r19:18
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r19
FUNCTION_BEGIN __save_r16_through_r17
{
memd(fp+#-8) = r17:16
jumpr lr
}
FUNCTION_END __save_r16_through_r17
// For each of the *_before_tailcall functions, jumpr lr is executed in parallel
// with deallocframe. That way, the return gets the old value of lr, which is
// where these functions need to return, and at the same time, lr gets the value
// it needs going into the tail call.
FUNCTION_BEGIN __restore_r16_through_r27_and_deallocframe_before_tailcall
r27:26 = memd(fp+#-48)
{
r25:24 = memd(fp+#-40)
r23:22 = memd(fp+#-32)
}
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r27_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r25_and_deallocframe_before_tailcall
{
r25:24 = memd(fp+#-40)
r23:22 = memd(fp+#-32)
}
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r25_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r23_and_deallocframe_before_tailcall
{
r23:22 = memd(fp+#-32)
r21:20 = memd(fp+#-24)
}
r19:18 = memd(fp+#-16)
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r23_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r21_and_deallocframe_before_tailcall
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r19_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r19_and_deallocframe_before_tailcall
r19:18 = memd(fp+#-16)
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r19_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r17_and_deallocframe_before_tailcall
{
r17:16 = memd(fp+#-8)
deallocframe
jumpr lr
}
FUNCTION_END __restore_r16_through_r17_and_deallocframe_before_tailcall
FUNCTION_BEGIN __restore_r16_through_r27_and_deallocframe
r27:26 = memd(fp+#-48)
{
r25:24 = memd(fp+#-40)
r23:22 = memd(fp+#-32)
}
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
dealloc_return
}
FUNCTION_END __restore_r16_through_r27_and_deallocframe
FUNCTION_BEGIN __restore_r16_through_r25_and_deallocframe
{
r25:24 = memd(fp+#-40)
r23:22 = memd(fp+#-32)
}
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
dealloc_return
}
FUNCTION_END __restore_r16_through_r25_and_deallocframe
FUNCTION_BEGIN __restore_r16_through_r23_and_deallocframe
{
r23:22 = memd(fp+#-32)
}
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
dealloc_return
}
FUNCTION_END __restore_r16_through_r23_and_deallocframe
FUNCTION_BEGIN __restore_r16_through_r21_and_deallocframe
{
r21:20 = memd(fp+#-24)
r19:18 = memd(fp+#-16)
}
{
r17:16 = memd(fp+#-8)
dealloc_return
}
FUNCTION_END __restore_r16_through_r21_and_deallocframe
FUNCTION_BEGIN __restore_r16_through_r19_and_deallocframe
{
r19:18 = memd(fp+#-16)
r17:16 = memd(fp+#-8)
}
{
dealloc_return
}
FUNCTION_END __restore_r16_through_r19_and_deallocframe
FUNCTION_BEGIN __restore_r16_through_r17_and_deallocframe
{
r17:16 = memd(fp+#-8)
dealloc_return
}
FUNCTION_END __restore_r16_through_r17_and_deallocframe
FUNCTION_BEGIN __deallocframe
dealloc_return
FUNCTION_END __deallocframe
Codebase Browser
llvm