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riscv: Implement VLA stuff

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makes 78_vla_label and 79_vla_continue work.
This commit is contained in:
Michael Matz 2019-07-15 21:42:29 +02:00
parent 9164594d1f
commit 5390a729d9
1 changed files with 7 additions and 3 deletions
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10
riscv64-gen.c
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@ -824,16 +824,20 @@ ST_FUNC void ggoto(void)
ST_FUNC void gen_vla_sp_save(int addr) ST_FUNC void gen_vla_sp_save(int addr)
{ {
tcc_error("implement me: %s", __FUNCTION__); ES(0x23, 3, 8, 2, addr); // sd sp, fc(s0)
} }
ST_FUNC void gen_vla_sp_restore(int addr) ST_FUNC void gen_vla_sp_restore(int addr)
{ {
tcc_error("implement me: %s", __FUNCTION__); EI(0x03, 3, 2, 8, addr); // ld sp, fc(s0)
} }
ST_FUNC void gen_vla_alloc(CType *type, int align) ST_FUNC void gen_vla_alloc(CType *type, int align)
{ {
tcc_error("implement me: %s", __FUNCTION__); int rr = ireg(gv(RC_INT));
EI(0x13, 0, rr, rr, 15); // addi RR, RR, 15
EI(0x13, 7, rr, rr, -16); // andi, RR, RR, -16
o(0x33 | (2 << 7) | (2 << 15) | (rr << 20) | (0x20 << 25)); //sub sp, sp, rr
vpop();
} }
#endif #endif