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

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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2
configure vendored
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@ -6066,7 +6066,7 @@ case "$target_name" in
;;
m68k)
bflt="yes"
gdb_xml_files="cf-core.xml cf-fp.xml"
gdb_xml_files="cf-core.xml cf-fp.xml m68k-fp.xml"
;;
microblaze|microblazeel)
TARGET_ARCH=microblaze

21
gdb-xml/m68k-fp.xml Normal file
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@ -0,0 +1,21 @@
<?xml version="1.0"?>
<!-- Copyright (C) 2008 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved. -->
<!DOCTYPE feature SYSTEM "gdb-target.dtd">
<feature name="org.gnu.gdb.coldfire.fp">
<reg name="fp0" bitsize="96" type="float" group="float"/>
<reg name="fp1" bitsize="96" type="float" group="float"/>
<reg name="fp2" bitsize="96" type="float" group="float"/>
<reg name="fp3" bitsize="96" type="float" group="float"/>
<reg name="fp4" bitsize="96" type="float" group="float"/>
<reg name="fp5" bitsize="96" type="float" group="float"/>
<reg name="fp6" bitsize="96" type="float" group="float"/>
<reg name="fp7" bitsize="96" type="float" group="float"/>
<reg name="fpcontrol" bitsize="32" group="float"/>
<reg name="fpstatus" bitsize="32" group="float"/>,
<reg name="fpiaddr" bitsize="32" type="code_ptr" group="float"/>
</feature>

45
target/m68k/helper.c
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@ -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. */
}