Files
kernels/kernel/src/vx_serial.S
Blaise Tine c1e168fdbe Vortex 2.0 changes:
+ Microarchitecture optimizations
+ 64-bit support
+ Xilinx FPGA support
+ LLVM-16 support
+ Refactoring and quality control fixes

minor update

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cleanup

cleanup

cache bindings and memory perf refactory

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hw unit tests fixes

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minor udpate

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minor updates

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2023-11-10 02:47:05 -08:00

78 lines
2.0 KiB
ArmAsm

// Copyright © 2019-2023
//
// 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 <VX_config.h>
#include <VX_types.h>
#define RISCV_CUSTOM0 0x0B
.type vx_serial, @function
.global vx_serial
vx_serial:
#if (XLEN == 64)
addi sp, sp, -56
sd ra, 48(sp)
sd s5, 40(sp)
sd s4, 32(sp)
sd s3, 24(sp)
sd s2, 16(sp)
sd s1, 8(sp)
sd s0, 0(sp)
#else
addi sp, sp, -28
sw ra, 24(sp)
sw s5, 20(sp)
sw s4, 16(sp)
sw s3, 12(sp)
sw s2, 8(sp)
sw s1, 4(sp)
sw s0, 0(sp)
#endif
mv s4, a0 # s4 <- callback
mv s3, a1 # s3 <- arg
csrr s2, VX_CSR_NUM_THREADS # s2 <- NT
csrr s1, VX_CSR_THREAD_ID # s1 <- tid
li s0, 0 # s0 <- index
label_loop:
sub t0, s0, s1
seqz t1, t0 # (index != tid)
.insn r RISCV_CUSTOM0, 2, 0, s5, t1, x0 # split s5, t0
bnez t0, label_join
mv a0, s3 # a0 <- arg
jalr s4 # callback(arg)
label_join:
.insn r RISCV_CUSTOM0, 3, 0, x0, s5, x0 # join s5
addi s0, s0, 1 # index++
blt s0, s2, label_loop # loop back
#if (XLEN == 64)
ld ra, 48(sp)
ld s5, 40(sp)
ld s4, 32(sp)
ld s3, 24(sp)
ld s2, 16(sp)
ld s1, 8(sp)
ld s0, 0(sp)
addi sp, sp, 56
#else
lw ra, 24(sp)
lw s5, 20(sp)
lw s4, 16(sp)
lw s3, 12(sp)
lw s2, 8(sp)
lw s1, 4(sp)
lw s0, 0(sp)
addi sp, sp, 28
#endif
ret