gwj / at91sam9263 · Commits

Commit 8e33c08c84b9f418dee69f79e7b579c59e77814b

Authored by ths
1 parent 197ea35a

MIPS FPU support for the gdb stub, by Daniel Jacobowitz. 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2242 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 1 changed file with 48 additions and 0 deletions
gdbstub.c
  View file @8e33c08
... ... @@ -532,11 +532,37 @@ static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
532 532 *(uint32_t *)ptr = tswapl(env->PC);
533 533 ptr += 4;
534 534  
  535 +#ifdef MIPS_USES_FPU
  536 + for (i = 0; i < 32; i++)
  537 + {
  538 + *(uint32_t *)ptr = tswapl(FPR_W (env, i));
  539 + ptr += 4;
  540 + }
  541 +
  542 + *(uint32_t *)ptr = tswapl(env->fcr31);
  543 + ptr += 4;
  544 +
  545 + *(uint32_t *)ptr = tswapl(env->fcr0);
  546 + ptr += 4;
  547 +#endif
  548 +
535 549 /* 32 FP registers, fsr, fir, fp. Not yet implemented. */
  550 + /* what's 'fp' mean here? */
536 551  
537 552 return ptr - mem_buf;
538 553 }
539 554  
  555 +/* convert MIPS rounding mode in FCR31 to IEEE library */
  556 +static unsigned int ieee_rm[] =
  557 + {
  558 + float_round_nearest_even,
  559 + float_round_to_zero,
  560 + float_round_up,
  561 + float_round_down
  562 + };
  563 +#define RESTORE_ROUNDING_MODE \
  564 + set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)
  565 +
540 566 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
541 567 {
542 568 int i;
... ... @@ -566,6 +592,28 @@ static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
566 592  
567 593 env->PC = tswapl(*(uint32_t *)ptr);
568 594 ptr += 4;
  595 +
  596 +#ifdef MIPS_USES_FPU
  597 + for (i = 0; i < 32; i++)
  598 + {
  599 + FPR_W (env, i) = tswapl(*(uint32_t *)ptr);
  600 + ptr += 4;
  601 + }
  602 +
  603 + env->fcr31 = tswapl(*(uint32_t *)ptr) & 0x0183FFFF;
  604 + ptr += 4;
  605 +
  606 + env->fcr0 = tswapl(*(uint32_t *)ptr);
  607 + ptr += 4;
  608 +
  609 + /* set rounding mode */
  610 + RESTORE_ROUNDING_MODE;
  611 +
  612 +#ifndef CONFIG_SOFTFLOAT
  613 + /* no floating point exception for native float */
  614 + SET_FP_ENABLE(env->fcr31, 0);
  615 +#endif
  616 +#endif
569 617 }
570 618 #elif defined (TARGET_SH4)
571 619 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
... ...