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target-m68k: define 96bit FP registers for gdb on 680x0

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Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170620205121.26515-5-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2017-06-20 22:51:19 +02:00
parent f83311e476
commit 5a4526b26a
3 changed files with 67 additions and 1 deletions
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45
target/m68k/helper.c
View file

@ -102,6 +102,48 @@ static int cf_fpu_gdb_set_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
return 0;
}
static int m68k_fpu_gdb_get_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
{
if (n < 8) {
stw_be_p(mem_buf, env->fregs[n].l.upper);
memset(mem_buf + 2, 0, 2);
stq_be_p(mem_buf + 4, env->fregs[n].l.lower);
return 12;
}
switch (n) {
case 8: /* fpcontrol */
stl_be_p(mem_buf, env->fpcr);
return 4;
case 9: /* fpstatus */
stl_be_p(mem_buf, env->fpsr);
return 4;
case 10: /* fpiar, not implemented */
memset(mem_buf, 0, 4);
return 4;
}
return 0;
}
static int m68k_fpu_gdb_set_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
{
if (n < 8) {
env->fregs[n].l.upper = lduw_be_p(mem_buf);
env->fregs[n].l.lower = ldq_be_p(mem_buf + 4);
return 12;
}
switch (n) {
case 8: /* fpcontrol */
env->fpcr = ldl_p(mem_buf);
return 4;
case 9: /* fpstatus */
env->fpsr = ldl_p(mem_buf);
return 4;
case 10: /* fpiar, not implemented */
return 4;
}
return 0;
}
M68kCPU *cpu_m68k_init(const char *cpu_model)
{
M68kCPU *cpu;
@ -130,6 +172,9 @@ void m68k_cpu_init_gdb(M68kCPU *cpu)
if (m68k_feature(env, M68K_FEATURE_CF_FPU)) {
gdb_register_coprocessor(cs, cf_fpu_gdb_get_reg, cf_fpu_gdb_set_reg,
11, "cf-fp.xml", 18);
} else if (m68k_feature(env, M68K_FEATURE_FPU)) {
gdb_register_coprocessor(cs, m68k_fpu_gdb_get_reg,
m68k_fpu_gdb_set_reg, 11, "m68k-fp.xml", 18);
}
/* TODO: Add [E]MAC registers. */
}