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rv64: Implement some pseudo-ops from Zicsr

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Aleksi Hannula 2025-11-29 21:06:21 +02:00
parent 6da45946ae
commit 78e5e690a2
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1 changed files with 33 additions and 0 deletions
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33
riscv64-asm.c
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@ -398,6 +398,15 @@ static void asm_unary_opcode(TCCState *s1, int token)
case TOK_ASM_rdinstreth:
asm_emit_opcode(opcode | (0xC82 << 20) | ENCODE_RD(op.reg));
return;
case TOK_ASM_frflags:
asm_emit_opcode(opcode | (0x001 << 20) | ENCODE_RD(op.reg));
return;
case TOK_ASM_frrm:
asm_emit_opcode(opcode | (0x002 << 20) | ENCODE_RD(op.reg));
return;
case TOK_ASM_frcsr:
asm_emit_opcode(opcode | (0x003 << 20) | ENCODE_RD(op.reg));
return;
case TOK_ASM_jr:
/* jalr zero, 0(rs)*/
@ -431,6 +440,7 @@ static void asm_unary_opcode(TCCState *s1, int token)
case TOK_ASM_c_jr:
asm_emit_cr(token, 2 | (8 << 12), &op, &zero);
return;
default:
expect("unary instruction");
}
@ -702,6 +712,22 @@ static void asm_binary_opcode(TCCState* s1, int token)
asm_emit_f(token, 0x53 | (4 << 27) | (0 << 25) | (2 << 12), &ops[0], &ops[1], &ops[1]);
return;
case TOK_ASM_csrs:
/* csrrs x0, csr, rs */
asm_emit_opcode(0x73 | (2 << 12) | (ops[0].e.v << 20) | ENCODE_RS1(ops[1].reg));
return;
case TOK_ASM_csrc:
/* csrrc x0, csr, rs */
asm_emit_opcode(0x73 | (3 << 12) | (ops[0].e.v << 20) | ENCODE_RS1(ops[1].reg));
return;
case TOK_ASM_fsrm:
/* csrrw rd, frm, rs */
asm_emit_opcode(0x73 | (1 << 12) | (2 << 20) | ENCODE_RD(ops[0].reg) | ENCODE_RS1(ops[1].reg));
return;
case TOK_ASM_fscsr:
/* csrrw rd, fcsr, rs */
asm_emit_opcode(0x73 | (1 << 12) | (3 << 20) | ENCODE_RD(ops[0].reg) | ENCODE_RS1(ops[1].reg));
return;
default:
expect("binary instruction");
}
@ -1564,6 +1590,9 @@ ST_FUNC void asm_opcode(TCCState *s1, int token)
case TOK_ASM_jr:
case TOK_ASM_call:
case TOK_ASM_tail:
case TOK_ASM_frflags:
case TOK_ASM_frrm:
case TOK_ASM_frcsr:
asm_unary_opcode(s1, token);
return;
@ -1581,6 +1610,10 @@ ST_FUNC void asm_opcode(TCCState *s1, int token)
case TOK_ASM_negw:
case TOK_ASM_fabs_s:
case TOK_ASM_fabs_d:
case TOK_ASM_csrc:
case TOK_ASM_csrs:
case TOK_ASM_fsrm:
case TOK_ASM_fscsr:
asm_binary_opcode(s1, token);
return;