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target-sparc: Use cpu_loop_exit_restore from helper_check_ieee_exceptions 

This avoids needing to save state before every FP operation.

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-09-09 11:34:28 -07:00
parent ba2397d1ca
commit 02c79d7885
2 changed files with 14 additions and 9 deletions
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17
target-sparc/fop_helper.c
View File

@ -19,12 +19,13 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#define QT0 (env->qt0)
#define QT1 (env->qt1)
target_ulong helper_check_ieee_exceptions(CPUSPARCState *env)
static target_ulong do_check_ieee_exceptions(CPUSPARCState *env, uintptr_t ra)
{
target_ulong status = get_float_exception_flags(&env->fp_status);
target_ulong fsr = env->fsr;
@ -51,12 +52,15 @@ target_ulong helper_check_ieee_exceptions(CPUSPARCState *env)
}
if ((fsr & FSR_CEXC_MASK) & ((fsr & FSR_TEM_MASK) >> 23)) {
CPUState *cs = CPU(sparc_env_get_cpu(env));
/* Unmasked exception, generate a trap. Note that while
the helper is marked as NO_WG, we can get away with
writing to cpu state along the exception path, since
TCG generated code will never see the write. */
env->fsr = fsr | FSR_FTT_IEEE_EXCP;
helper_raise_exception(env, TT_FP_EXCP);
cs->exception_index = TT_FP_EXCP;
cpu_loop_exit_restore(cs, ra);
} else {
/* Accumulate exceptions */
fsr |= (fsr & FSR_CEXC_MASK) << 5;
@ -66,6 +70,11 @@ target_ulong helper_check_ieee_exceptions(CPUSPARCState *env)
return fsr;
}
target_ulong helper_check_ieee_exceptions(CPUSPARCState *env)
{
return do_check_ieee_exceptions(env, GETPC());
}
#define F_HELPER(name, p) void helper_f##name##p(CPUSPARCState *env)
#define F_BINOP(name) \
@ -262,7 +271,7 @@ void helper_fsqrtq(CPUSPARCState *env)
ret = glue(size, _compare_quiet)(reg1, reg2, \
&env->fp_status); \
} \
fsr = helper_check_ieee_exceptions(env); \
fsr = do_check_ieee_exceptions(env, GETPC()); \
switch (ret) { \
case float_relation_unordered: \
fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \
@ -293,7 +302,7 @@ void helper_fsqrtq(CPUSPARCState *env)
ret = glue(size, _compare_quiet)(src1, src2, \
&env->fp_status); \
} \
fsr = helper_check_ieee_exceptions(env); \
fsr = do_check_ieee_exceptions(env, GETPC()); \
switch (ret) { \
case float_relation_unordered: \
fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \

6
target-sparc/translate.c
View File

@ -3464,7 +3464,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
rs1 = GET_FIELD(insn, 13, 17);
rs2 = GET_FIELD(insn, 27, 31);
xop = GET_FIELD(insn, 18, 26);
save_state(dc);
switch (xop) {
case 0x1: /* fmovs */
cpu_src1_32 = gen_load_fpr_F(dc, rs2);
@ -3639,7 +3639,6 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
rs1 = GET_FIELD(insn, 13, 17);
rs2 = GET_FIELD(insn, 27, 31);
xop = GET_FIELD(insn, 18, 26);
save_state(dc);
#ifdef TARGET_SPARC64
#define FMOVR(sz) \
@ -5276,7 +5275,6 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
if (gen_trap_ifnofpu(dc)) {
goto jmp_insn;
}
save_state(dc);
switch (xop) {
case 0x20: /* ldf, load fpreg */
gen_address_mask(dc, cpu_addr);
@ -5390,7 +5388,6 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
if (gen_trap_ifnofpu(dc)) {
goto jmp_insn;
}
save_state(dc);
switch (xop) {
case 0x24: /* stf, store fpreg */
{
@ -5449,7 +5446,6 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn)
goto illegal_insn;
}
} else if (xop > 0x33 && xop < 0x3f) {
save_state(dc);
switch (xop) {
#ifdef TARGET_SPARC64
case 0x34: /* V9 stfa */