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target-sparc: Change fpr representation to doubles.

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This allows a more efficient representation for 64-bit hosts.
It should be about the same for 32-bit hosts, as we can still
access the individual pieces of the double.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2011-10-17 10:42:49 -07:00
parent 45c7b743cd
commit 30038fd818
8 changed files with 202 additions and 211 deletions
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35
gdbstub.c
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@ -814,7 +814,11 @@ static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
if (n < 64) {
/* fprs */
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
if (n & 1) {
GET_REG32(env->fpr[(n - 32) / 2].l.lower);
} else {
GET_REG32(env->fpr[(n - 32) / 2].l.upper);
}
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
@ -831,15 +835,15 @@ static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
#else
if (n < 64) {
/* f0-f31 */
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
if (n & 1) {
GET_REG32(env->fpr[(n - 32) / 2].l.lower);
} else {
GET_REG32(env->fpr[(n - 32) / 2].l.upper);
}
}
if (n < 80) {
/* f32-f62 (double width, even numbers only) */
uint64_t val;
val = (uint64_t)*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) << 32;
val |= *((uint32_t *)&env->fpr[(n - 64) * 2 + 33]);
GET_REG64(val);
GET_REG64(env->fpr[(n - 32) / 2].ll);
}
switch (n) {
case 80: GET_REGL(env->pc);
@ -878,7 +882,12 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
else if (n < 64) {
/* fprs */
*((uint32_t *)&env->fpr[n - 32]) = tmp;
/* f0-f31 */
if (n & 1) {
env->fpr[(n - 32) / 2].l.lower = tmp;
} else {
env->fpr[(n - 32) / 2].l.upper = tmp;
}
} else {
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
@ -896,12 +905,16 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
#else
else if (n < 64) {
/* f0-f31 */
env->fpr[n] = ldfl_p(mem_buf);
tmp = ldl_p(mem_buf);
if (n & 1) {
env->fpr[(n - 32) / 2].l.lower = tmp;
} else {
env->fpr[(n - 32) / 2].l.upper = tmp;
}
return 4;
} else if (n < 80) {
/* f32-f62 (double width, even numbers only) */
*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) = tmp >> 32;
*((uint32_t *)&env->fpr[(n - 64) * 2 + 33]) = tmp;
env->fpr[(n - 32) / 2].ll = tmp;
} else {
switch (n) {
case 80: env->pc = tmp; break;