Index: libcfa/src/concurrency/CtxSwitch-arm.S =================================================================== --- libcfa/src/concurrency/CtxSwitch-arm.S (revision 772411a49716ab9189e40b53c765fb82a0020e7a) +++ (revision ) @@ -1,104 +1,0 @@ -// -// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo -// -// CtxSwitch-arm.S -- -// -// Author : Peter A. Buhr -// Created On : Sun Aug 16 07:50:13 2020 -// Last Modified By : Peter A. Buhr -// Last Modified On : Thu Aug 20 18:43:51 2020 -// Update Count : 24 -// - -// The context switch routine requires the initial the stack of a thread to -// look like the thread has saved its context in the normal manner. - -// Offsets must synchronized with the __stack_context_t in invoke.h. - -#define PTR_BYTE 8 -#define SP_OFFSET ( 0 * PTR_BYTE ) -#define FP_OFFSET ( 1 * PTR_BYTE ) - -// Context switch between coroutines/tasks. -// void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) ; -// Arguments "from" in register x0, "to" in register x1. - -#define SAVE 20 * 8 - - .file "CtxSwitch-arm.S" - .text - .align 2 - .global __cfactx_switch - .type __cfactx_switch, @function -__cfactx_switch: - - sub sp, sp, #SAVE // push stack - - // Save volatile GP registers x19-x30 on the stack. - - stp x19, x20, [sp, #0x00] - stp x21, x22, [sp, #0x10] - stp x23, x24, [sp, #0x20] - stp x25, x26, [sp, #0x30] - stp x27, x28, [sp, #0x40] - stp x29, x30, [sp, #0x50] // x29 => fp - - // Save volatile SIMD/FPU registers d8-d15 on the stack. - - stp d8, d9, [sp, #0x60] - stp d10, d11, [sp, #0x70] - stp d12, d13, [sp, #0x80] - stp d14, d15, [sp, #0x90] - - // Save old context in the "from" area. - - mov x4, sp // cannot store sp directly - str x4, [x0, #SP_OFFSET] - str fp, [x0, #FP_OFFSET] - - // Load new context from the "to" area. - - ldr fp, [x1, #FP_OFFSET] - ldr x4, [x1, #SP_OFFSET] - mov sp, x4 // cannot store sp directly - - // Load volatile GP registers x19-x30 from the stack. - - ldp x19, x20, [sp, #0x00] - ldp x21, x22, [sp, #0x10] - ldp x23, x24, [sp, #0x20] - ldp x25, x26, [sp, #0x30] - ldp x27, x28, [sp, #0x40] - ldp x29, x30, [sp, #0x50] - - // Load volatile SIMD/FPU registers d8-d15 from the stack. - - ldp d8, d9, [sp, #0x60] - ldp d10, d11, [sp, #0x70] - ldp d12, d13, [sp, #0x80] - ldp d14, d15, [sp, #0x90] - - add sp, sp, #SAVE // pop stack - ret // return to new thread (mov pc, x30) - - .size __cfactx_switch, .-__cfactx_switch - .section .note.GNU-stack,"",%progbits // mark no executable stack needed - -// Stub to create new stacks which can be context switched to -// void __cfactx_invoke_stub( void ); - - .text - .align 2 - .global __cfactx_invoke_stub - .type __cfactx_invoke_stub, @function -__cfactx_invoke_stub: - mov x0, x19 // load main as parameter 0 - mov x1, x20 // load this as parameter 1 - mov x30, x21 // load coroutine invoke routine - ret // and jmp to it (mov pc, x30) - .size __cfactx_invoke_stub, .-__cfactx_invoke_stub - -// Local Variables: // -// mode: c // -// tab-width: 4 // -// End: // Index: libcfa/src/concurrency/CtxSwitch-arm64.S =================================================================== --- libcfa/src/concurrency/CtxSwitch-arm64.S (revision a3effccaaf0fb54f32e321fd05e95ab0bf47d1aa) +++ libcfa/src/concurrency/CtxSwitch-arm64.S (revision a3effccaaf0fb54f32e321fd05e95ab0bf47d1aa) @@ -0,0 +1,104 @@ +// +// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo +// +// CtxSwitch-arm.S -- +// +// Author : Peter A. Buhr +// Created On : Sun Aug 16 07:50:13 2020 +// Last Modified By : Peter A. Buhr +// Last Modified On : Thu Aug 20 18:43:51 2020 +// Update Count : 24 +// + +// The context switch routine requires the initial the stack of a thread to +// look like the thread has saved its context in the normal manner. + +// Offsets must synchronized with the __stack_context_t in invoke.h. + +#define PTR_BYTE 8 +#define SP_OFFSET ( 0 * PTR_BYTE ) +#define FP_OFFSET ( 1 * PTR_BYTE ) + +// Context switch between coroutines/tasks. +// void __cfactx_switch( struct __stack_context_t * from, struct __stack_context_t * to ) ; +// Arguments "from" in register x0, "to" in register x1. + +#define SAVE 20 * 8 + + .file "CtxSwitch-arm.S" + .text + .align 2 + .global __cfactx_switch + .type __cfactx_switch, @function +__cfactx_switch: + + sub sp, sp, #SAVE // push stack + + // Save volatile GP registers x19-x30 on the stack. + + stp x19, x20, [sp, #0x00] + stp x21, x22, [sp, #0x10] + stp x23, x24, [sp, #0x20] + stp x25, x26, [sp, #0x30] + stp x27, x28, [sp, #0x40] + stp x29, x30, [sp, #0x50] // x29 => fp + + // Save volatile SIMD/FPU registers d8-d15 on the stack. + + stp d8, d9, [sp, #0x60] + stp d10, d11, [sp, #0x70] + stp d12, d13, [sp, #0x80] + stp d14, d15, [sp, #0x90] + + // Save old context in the "from" area. + + mov x4, sp // cannot store sp directly + str x4, [x0, #SP_OFFSET] + str fp, [x0, #FP_OFFSET] + + // Load new context from the "to" area. + + ldr fp, [x1, #FP_OFFSET] + ldr x4, [x1, #SP_OFFSET] + mov sp, x4 // cannot store sp directly + + // Load volatile GP registers x19-x30 from the stack. + + ldp x19, x20, [sp, #0x00] + ldp x21, x22, [sp, #0x10] + ldp x23, x24, [sp, #0x20] + ldp x25, x26, [sp, #0x30] + ldp x27, x28, [sp, #0x40] + ldp x29, x30, [sp, #0x50] + + // Load volatile SIMD/FPU registers d8-d15 from the stack. + + ldp d8, d9, [sp, #0x60] + ldp d10, d11, [sp, #0x70] + ldp d12, d13, [sp, #0x80] + ldp d14, d15, [sp, #0x90] + + add sp, sp, #SAVE // pop stack + ret // return to new thread (mov pc, x30) + + .size __cfactx_switch, .-__cfactx_switch + .section .note.GNU-stack,"",%progbits // mark no executable stack needed + +// Stub to create new stacks which can be context switched to +// void __cfactx_invoke_stub( void ); + + .text + .align 2 + .global __cfactx_invoke_stub + .type __cfactx_invoke_stub, @function +__cfactx_invoke_stub: + mov x0, x19 // load main as parameter 0 + mov x1, x20 // load this as parameter 1 + mov x30, x21 // load coroutine invoke routine + ret // and jmp to it (mov pc, x30) + .size __cfactx_invoke_stub, .-__cfactx_invoke_stub + +// Local Variables: // +// mode: c // +// tab-width: 4 // +// End: //