JMP → JAL + spec fix
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@ -21,11 +21,11 @@ macros::impl_both!(
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=> [LD, ST],
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bbd(p0: R, p1: R, p2: I)
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=> [ADDI, MULI, ANDI, ORI, XORI, SLI, SRI, SRSI, CMPI, CMPUI,
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BMC, JEQ, JNE, JLT, JGT, JLTU, JGTU, ADDFI, MULFI],
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BMC, JAL, JEQ, JNE, JLT, JGT, JLTU, JGTU, ADDFI, MULFI],
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bb(p0: R, p1: R)
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=> [NEG, NOT, CP, SWA, NEGF, ITF, FTI],
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bd(p0: R, p1: I)
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=> [LI, JMP],
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=> [LI],
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n()
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=> [NOP, ECALL],
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);
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@ -54,7 +54,7 @@ constmod!(pub opcode(u8) {
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BMC = 30, "BBD; [#0] ← [#1], imm #2 bytes";
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BRC = 31, "BBB; #0 ← #1, imm #2 registers";
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JMP = 32, "BD; Unconditional jump [#0 + imm #1]";
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JAL = 32, "BD; Copy PC to #0 and unconditional jump [#1 + imm #2]";
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JEQ = 33, "BBD; if #0 = #1 → jump imm #2";
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JNE = 34, "BBD; if #0 ≠ #1 → jump imm #2";
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JLT = 35, "BBD; if #0 < #1 → jump imm #2";
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@ -50,8 +50,8 @@ pub fn validate(mut program: &[u8]) -> Result<(), Error> {
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| [DIR | DIRF, _, _, _, _, rest @ ..]
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| [ADD..=CMPU | BRC | ADDF..=MULF, _, _, _, rest @ ..]
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| [NEG..=NOT | CP..=SWA | NEGF..=FTI, _, _, rest @ ..]
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| [LI | JMP, _, _, _, _, _, _, _, _, _, rest @ ..]
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| [ADDI..=CMPUI | BMC | JEQ..=JGTU | ADDFI..=MULFI, _, _, _, _, _, _, _, _, _, _, rest @ ..]
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| [LI, _, _, _, _, _, _, _, _, _, rest @ ..]
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| [ADDI..=CMPUI | BMC | JAL..=JGTU | ADDFI..=MULFI, _, _, _, _, _, _, _, _, _, _, rest @ ..]
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| [LD..=ST, _, _, _, _, _, _, _, _, _, _, _, _, rest @ ..] => rest,
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_ => {
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return Err(Error {
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@ -259,8 +259,9 @@ impl<'a, PfHandler: HandlePageFault, const TIMER_QUOTIENT: usize>
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usize::from(count * 8),
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);
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}
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JMP => {
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let ParamBD(reg, offset) = param!(self, ParamBD);
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JAL => {
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let ParamBBD(save, reg, offset) = param!(self, ParamBBD);
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self.write_reg(save, self.pc as u64);
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self.pc = (self.read_reg(reg).as_u64() + offset) as usize;
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}
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JEQ => cond_jump!(self, int, Equal),
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12
spec.md
12
spec.md
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@ -153,7 +153,7 @@
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| Opcode | Name | Action |
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|:------:|:----:|:--------------------------------:|
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| 30 | BMC | `[#0] ← [#1], copy imm #2 bytes` |
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| 30 | BMC | `[#1] ← [#0], copy imm #2 bytes` |
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### Register copy
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- Type BBB
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@ -161,16 +161,16 @@
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| Opcode | Name | Action |
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|:------:|:----:|:--------------------------------:|
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| 31 | BRC | `#0 ← #1, copy imm #2 registers` |
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| 31 | BRC | `#1 ← #0, copy imm #2 registers` |
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## Control flow
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### Unconditional jump
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- Type BD
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- Type BBD
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| Opcode | Name | Action |
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|:------:|:----:|:---------------------:|
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| 32 | JMP | Jump at `#0 + imm #1` |
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| Opcode | Name | Action |
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|:------:|:----:|:-------------------------------------------------:|
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| 32 | JAL | Save current PC to `#0` and jump at `#1 + imm #2` |
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### Conditional jumps
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- Type BBD
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