picorv32/scripts/tomthumbtg/start.S

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2016-10-23 08:32:26 -04:00
.section .text.start
.global testcollection
/* zero-initialize all registers */
addi x1, zero, 0
addi x2, zero, 0
addi x3, zero, 0
addi x4, zero, 0
addi x5, zero, 0
addi x6, zero, 0
addi x7, zero, 0
addi x8, zero, 0
addi x9, zero, 0
addi x10, zero, 0
addi x11, zero, 0
addi x12, zero, 0
addi x13, zero, 0
addi x14, zero, 0
addi x15, zero, 0
addi x16, zero, 0
addi x17, zero, 0
addi x18, zero, 0
addi x19, zero, 0
addi x20, zero, 0
addi x21, zero, 0
addi x22, zero, 0
addi x23, zero, 0
addi x24, zero, 0
addi x25, zero, 0
addi x26, zero, 0
addi x27, zero, 0
addi x28, zero, 0
addi x29, zero, 0
addi x30, zero, 0
addi x31, zero, 0
/* set stack pointer */
lui sp, %hi(64*1024)
addi sp, sp, %lo(64*1024)
/* push zeros on the stack for argc and argv */
/* (stack is aligned to 16 bytes in riscv calling convention) */
addi sp,sp,-16
sw zero,0(sp)
sw zero,4(sp)
sw zero,8(sp)
sw zero,12(sp)
/* call test */
call testcollection
/* write test results */
lui x1, %hi(0x10000000)
addi x1, x1, %lo(0x10000000)
sw x5, 0(x1)
ebreak