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added ebreak support

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Luxferre
2026-06-18 19:34:05 +03:00
parent 8c8de3bc1c
commit 7368329c16
5 changed files with 15 additions and 4 deletions
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amach.awk
+3 -3
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@@ -170,6 +170,7 @@ function amach_imm(opcode, f3, rd, rs1, immval, r1, ur1, shamt) {
pc = r1 + immval
} else if(opcode == 115) { # 0x73, system call / csr
if(immval == 0) handle_ecall(getreg(17), getreg(10), getreg(11), getreg(12), getreg(13), getreg(14), getreg(15))
else if(immval == 1) trapout(sprintf("EBREAK at 0x%X", pc-4))
else trapout(sprintf("Unimplemented external system call at 0x%X", pc-4))
} else trapout(sprintf("Illegal instruction at 0x%X", pc-4))
}
@@ -317,9 +318,8 @@ function amach_comp(instr, op, f3, b12, r11_7, r9_7, r6_2, r4_2, shamt, imm, ba
} else setreg(r11_7, getreg(r6_2)) # C.MV
} else {
if(r6_2 == 0) {
if(r11_7 == 0) { # C.EBREAK
trapout(sprintf("EBREAK at 0x%X", pc-2))
} else { # C.JALR
if(r11_7 == 0) trapout(sprintf("EBREAK at 0x%X", pc-2)) # C.EBREAK
else { # C.JALR
imm = getreg(r11_7)
setreg(1, pc)
pc = imm