derek.holloway
7502bf64a4
CodeQL / Analyze (actions) (push) Canceled after 0s
CodeQL / Analyze (python) (push) Canceled after 0s
pre-commit / pre-commit (push) Canceled after 0s
Multi-Arch CI / setup (push) Canceled after 0s
Publish build_manylinux_x86_64 images / publish_build_manylinux_x86_64 (push) Canceled after 0s
Setup (Multi-Arch) / setup (push) Canceled after 0s
Multi-Arch CI / Linux::${{ fromJSON(needs.setup.outputs.linux_build_config || '{}').build_variant_label || 'skip' }} (push) Canceled after 0s
Publish TheRock Docker image / build-and-push-image (push) Canceled after 0s
Publish no_rocm_image_ubi10 image / publish_no_rocm_image_ubi10 (push) Canceled after 0s
Multi-Arch CI / Windows::${{ fromJSON(needs.setup.outputs.windows_build_config || '{}').build_variant_label || 'skip' }} (push) Canceled after 0s
Publish TheRock Docker image / build-and-push-image (push) Canceled after 0s
Multi-Arch CI / Manifest Diff (push) Canceled after 0s
TheRock Manifest Diff Report / Generate Manifest Diff Report (push) Canceled after 0s
Multi-Arch CI / CI Summary (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04 images / publish_no_rocm_image_ubuntu24_04 (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04_ocl_rt images / publish_no_rocm_image_ubuntu24_04_ocl_rt (push) Canceled after 0s
Publish TheRock Docker image / build-and-push-image (push) Canceled after 0s
Publish TheRock Docker image / build-and-push-image (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04 images / publish_no_rocm_image_ubuntu24_04_rocgdb (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04_rocgdb images / publish_no_rocm_image_ubuntu24_04_rocgdb (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04 images / publish_no_rocm_image_ubuntu24_04_ocl_rt (push) Canceled after 0s
Publish TheRock Docker image / build-and-push-image (push) Canceled after 0s
Unit Tests / Unit Tests :: ubuntu-24.04 (push) Canceled after 0s
Unit Tests / Unit Tests :: windows-2022 (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04 images / publish_no_rocm_image_ubuntu24_04_media (push) Canceled after 0s
Unit Tests / Unit Tests Summary (push) Canceled after 0s
Publish no_rocm_image_ubuntu24_04 images / publish_no_rocm_image_ubuntu24_04_openmpi (push) Canceled after 0s
46 lines
1.9 KiB
ArmAsm
46 lines
1.9 KiB
ArmAsm
//===-- switch.S - Implement switch* --------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "../assembly.h"
|
|
|
|
//
|
|
// When compiling switch statements in thumb mode, the compiler
|
|
// can use these __switch* helper functions The compiler emits a blx to
|
|
// the __switch* function followed by a table of displacements for each
|
|
// case statement. On entry, R0 is the index into the table. The __switch*
|
|
// function uses the return address in lr to find the start of the table.
|
|
// The first entry in the table is the count of the entries in the table.
|
|
// It then uses R0 to index into the table and get the displacement of the
|
|
// address to jump to. If R0 is greater than the size of the table, it jumps
|
|
// to the last entry in the table. Each displacement in the table is actually
|
|
// the distance from lr to the label, thus making the tables PIC.
|
|
|
|
|
|
.text
|
|
.syntax unified
|
|
|
|
//
|
|
// The table contains signed 4-byte sized elements which are the distance
|
|
// from lr to the target label.
|
|
//
|
|
.p2align 2
|
|
DEFINE_COMPILERRT_PRIVATE_FUNCTION(__switch32)
|
|
ldr ip, [lr, #-1] // get first 32-bit word in table
|
|
cmp r0, ip // compare with index
|
|
add r0, lr, r0, lsl #2 // compute address of element in table
|
|
add ip, lr, ip, lsl #2 // compute address of last element in table
|
|
ite lo
|
|
ldrlo r0, [r0, #3] // load 32-bit element if r0 is in range
|
|
ldrhs r0, [ip, #3] // load 32-bit element if r0 out of range
|
|
add ip, lr, r0 // compute label = lr + element
|
|
bx ip // jump to computed label
|
|
END_COMPILERRT_FUNCTION(__switch32)
|
|
|
|
NO_EXEC_STACK_DIRECTIVE
|
|
|