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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
This commit is contained in:
ths 2006-12-11 19:22:27 +00:00
parent 197ea35ab2
commit 8e33c08c84
1 changed files with 48 additions and 0 deletions

48
gdbstub.c
View File

@ -532,11 +532,37 @@ static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
*(uint32_t *)ptr = tswapl(env->PC);
ptr += 4;
#ifdef MIPS_USES_FPU
for (i = 0; i < 32; i++)
{
*(uint32_t *)ptr = tswapl(FPR_W (env, i));
ptr += 4;
}
*(uint32_t *)ptr = tswapl(env->fcr31);
ptr += 4;
*(uint32_t *)ptr = tswapl(env->fcr0);
ptr += 4;
#endif
/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
/* what's 'fp' mean here? */
return ptr - mem_buf;
}
/* convert MIPS rounding mode in FCR31 to IEEE library */
static unsigned int ieee_rm[] =
{
float_round_nearest_even,
float_round_to_zero,
float_round_up,
float_round_down
};
#define RESTORE_ROUNDING_MODE \
set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status)
static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
{
int i;
@ -566,6 +592,28 @@ static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
env->PC = tswapl(*(uint32_t *)ptr);
ptr += 4;
#ifdef MIPS_USES_FPU
for (i = 0; i < 32; i++)
{
FPR_W (env, i) = tswapl(*(uint32_t *)ptr);
ptr += 4;
}
env->fcr31 = tswapl(*(uint32_t *)ptr) & 0x0183FFFF;
ptr += 4;
env->fcr0 = tswapl(*(uint32_t *)ptr);
ptr += 4;
/* set rounding mode */
RESTORE_ROUNDING_MODE;
#ifndef CONFIG_SOFTFLOAT
/* no floating point exception for native float */
SET_FP_ENABLE(env->fcr31, 0);
#endif
#endif
}
#elif defined (TARGET_SH4)
static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)