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make irq_restore be executed likely

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This commit is contained in:
acevest
2019-10-08 21:36:51 +08:00
parent 1fc66ae527
commit 21f48361de
1 changed files with 18 additions and 18 deletions
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36
arch/risc-v/rv32i/gcc/port_s.S
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@@ -250,7 +250,6 @@ restore_context:
lw x29, __reg_x29_OFFSET(sp)
lw x30, __reg_x30_OFFSET(sp)
lw x31, __reg_x31_OFFSET(sp)
addi sp, sp, 128
mret
@@ -260,7 +259,6 @@ restore_context:
.global rv32_exception_entry
rv32_exception_entry:
addi sp, sp, -128
sw ra, __reg_ra__OFFSET(sp)
sw gp, __reg_gp__OFFSET(sp)
sw tp, __reg_tp__OFFSET(sp)
@@ -305,22 +303,8 @@ rv32_exception_entry:
la t0, k_curr_task
la t1, k_next_task
beq t0, t1, irq_restore
sw s0, __reg_s0__OFFSET(sp)
sw s1, __reg_s1__OFFSET(sp)
sw s2, __reg_s2__OFFSET(sp)
sw s3, __reg_s3__OFFSET(sp)
sw s4, __reg_s4__OFFSET(sp)
sw s5, __reg_s5__OFFSET(sp)
sw s6, __reg_s6__OFFSET(sp)
sw s7, __reg_s7__OFFSET(sp)
sw s8, __reg_s8__OFFSET(sp)
sw s9, __reg_s9__OFFSET(sp)
sw s10, __reg_s10__OFFSET(sp)
sw s11, __reg_s11__OFFSET(sp)
j switch_task
// unlikely
bne t0, t1, irq_task_switch
irq_restore:
lw t0, __reg_mepc_OFFSET(sp)
@@ -350,3 +334,19 @@ irq_restore:
addi sp, sp, 128
mret
irq_task_switch:
sw s0, __reg_s0__OFFSET(sp)
sw s1, __reg_s1__OFFSET(sp)
sw s2, __reg_s2__OFFSET(sp)
sw s3, __reg_s3__OFFSET(sp)
sw s4, __reg_s4__OFFSET(sp)
sw s5, __reg_s5__OFFSET(sp)
sw s6, __reg_s6__OFFSET(sp)
sw s7, __reg_s7__OFFSET(sp)
sw s8, __reg_s8__OFFSET(sp)
sw s9, __reg_s9__OFFSET(sp)
sw s10, __reg_s10__OFFSET(sp)
sw s11, __reg_s11__OFFSET(sp)
j switch_task