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sh2 drc, fix PIC function calling for MIPS backend

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This commit is contained in:
kub 2020-10-31 21:05:27 +01:00
parent 8c54e0dd8f
commit fde25b40fe
7 changed files with 99 additions and 26 deletions
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30
cpu/drc/emit_mips.c
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@ -11,6 +11,7 @@
// saved: r16-r23,r30, reserved: r0(zero), r26-r27(irq), r28(gp), r29(sp)
// r1,r15,r24,r25(at,t7-t9) are used internally by the code emitter
// MIPSN32/MIPS64 ABI: params: r4-r11, no caller-reserved save area on stack
// for PIC code, on function calls r25(t9) must contain the called address
#define RET_REG 2 // v0
#define PARAM_REGS { 4, 5, 6, 7 } // a0-a3
#define PRESERVED_REGS { 16, 17, 18, 19, 20, 21, 22, 23 } // s0-s7
@ -26,6 +27,7 @@
// registers usable for user code: r1-r25, others reserved or special
#define Z0 0 // zero register
#define CR 25 // call register
#define GP 28 // global pointer
#define SP 29 // stack pointer
#define FP 30 // frame pointer
@ -1510,8 +1512,8 @@ static int emith_cond_check(int cond, int *r)
emith_jump_reg(r)
#define emith_jump_ctx(offs) do { \
emith_ctx_read_ptr(AT, offs); \
emith_jump_reg(AT); \
emith_ctx_read_ptr(CR, offs); \
emith_jump_reg(CR); \
} while (0)
#define emith_jump_ctx_c(cond, offs) \
emith_jump_ctx(offs)
@ -1523,10 +1525,26 @@ static int emith_cond_check(int cond, int *r)
#define emith_call_reg(r) \
emith_branch(MIPS_JALR(LR, r))
#define emith_call_ctx(offs) do { \
emith_ctx_read_ptr(AT, offs); \
emith_call_reg(AT); \
emith_ctx_read_ptr(CR, offs); \
emith_call_reg(CR); \
} while (0)
#define emith_abijump_reg(r) do { \
if ((r) != CR) emith_move_r_r(CR, r); \
emith_branch(MIPS_JR(CR)); \
} while (0)
#define emith_abijump_reg_c(cond, r) \
emith_abijump_reg(r)
#define emith_abicall(target) do { \
emith_move_r_imm(CR, target); \
emith_branch(MIPS_JALR(LR, CR)); \
} while (0)
#define emith_abicall_cond(cond, target) \
emith_abicall(target)
#define emith_abicall_reg(r) do { \
if ((r) != CR) emith_move_r_r(CR, r); \
emith_branch(MIPS_JALR(LR, CR)); \
} while (0)
#define emith_call_cleanup() /**/
@ -1627,7 +1645,7 @@ static NOINLINE void host_instructions_updated(void *base, void *end, int force)
emith_lsl(func, func, PTR_SCALE); \
emith_read_r_r_r_ptr(func, tab, func); \
emith_move_r_r_ptr(6, CONTEXT_REG); /* arg2 */ \
emith_jump_reg(func); \
emith_abijump_reg(func); \
} while (0)
#define emith_sh2_delay_loop(cycles, reg) do { \