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riscv64-asm.c: parse_operand: document some ABI details

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noneofyourbusiness 2026-01-17 11:27:30 +01:00
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riscv64-asm.c
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@ -209,6 +209,16 @@ static void parse_operand(TCCState *s1, Operand *op)
if ((int) op->e.v >= -0x1000 && (int) op->e.v < 0x1000) if ((int) op->e.v >= -0x1000 && (int) op->e.v < 0x1000)
op->type = OP_IM12S; op->type = OP_IM12S;
} else if (op->e.sym->type.t & (VT_EXTERN | VT_STATIC)) { } else if (op->e.sym->type.t & (VT_EXTERN | VT_STATIC)) {
/* see also: "RISC-V ABIs Specification" V1.0
section 5.2 recommends using a GOT for
"possibly-undefined weak symbols"
section 5.3: "Medium position independent code model"
if this is a non-local symbol: use a GOT
non-local: outside of a pc-relative +- 2 GiB range
*/
label.type.t = VT_VOID | VT_STATIC; label.type.t = VT_VOID | VT_STATIC;
/* use the medium PIC model: GOT, auipc, lw */ /* use the medium PIC model: GOT, auipc, lw */