@@ -21,7 +21,8 @@
#include "cpu.h"
#include "exec/helper-proto.h"
-#define ADD_NAN 0x7cf00001
+#define QUIET_NAN 0x7fc00000
+#define ADD_NAN 0x7fc00001
#define DIV_NAN 0x7fc00008
#define MUL_NAN 0x7fc00002
#define FPU_FS PSW_USB_C
@@ -47,6 +48,42 @@ static inline bool f_is_denormal(float32 arg)
return float32_is_zero_or_denormal(arg) && !float32_is_zero(arg);
}
+static inline float32 f_maddsub_nan_result(float32 arg1, float32 arg2,
+ float32 arg3, float32 result,
+ uint32_t muladd_negate_c)
+{
+ uint32_t aSign, bSign, cSign;
+ uint32_t aExp, bExp, cExp;
+
+ if (float32_is_any_nan(arg1) || float32_is_any_nan(arg2) ||
+ float32_is_any_nan(arg3)) {
+ return QUIET_NAN;
+ } else if (float32_is_infinity(arg1) && float32_is_zero(arg2)) {
+ return MUL_NAN;
+ } else if (float32_is_zero(arg1) && float32_is_infinity(arg2)) {
+ return MUL_NAN;
+ } else {
+ aSign = arg1 >> 31;
+ bSign = arg2 >> 31;
+ cSign = arg3 >> 31;
+
+ aExp = (arg1 >> 23) & 0xff;
+ bExp = (arg2 >> 23) & 0xff;
+ cExp = (arg3 >> 23) & 0xff;
+
+ if (muladd_negate_c) {
+ cSign ^= 1;
+ }
+ if (((aExp == 0xff) || (bExp == 0xff)) && (cExp == 0xff)) {
+ if (aSign ^ bSign ^ cSign) {
+ return ADD_NAN;
+ }
+ }
+ }
+
+ return result;
+}
+
static void f_update_psw_flags(CPUTriCoreState *env, uint8_t flags)
{
uint8_t some_excp = 0;
@@ -159,6 +196,60 @@ uint32_t helper_fdiv(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
return (uint32_t)f_result;
}
+uint32_t helper_fmadd(CPUTriCoreState *env, uint32_t r1,
+ uint32_t r2, uint32_t r3)
+{
+ uint32_t flags;
+ float32 arg1 = make_float32(r1);
+ float32 arg2 = make_float32(r2);
+ float32 arg3 = make_float32(r3);
+ float32 f_result;
+
+ f_result = float32_muladd(arg1, arg2, arg3, 0, &env->fp_status);
+
+ flags = f_get_excp_flags(env);
+ if (flags) {
+ if (flags & float_flag_invalid) {
+ arg1 = float32_squash_input_denormal(arg1, &env->fp_status);
+ arg2 = float32_squash_input_denormal(arg2, &env->fp_status);
+ arg3 = float32_squash_input_denormal(arg3, &env->fp_status);
+ f_result = f_maddsub_nan_result(arg1, arg2, arg3, f_result, 0);
+ }
+ f_update_psw_flags(env, flags);
+ } else {
+ env->FPU_FS = 0;
+ }
+ return (uint32_t)f_result;
+}
+
+uint32_t helper_fmsub(CPUTriCoreState *env, uint32_t r1,
+ uint32_t r2, uint32_t r3)
+{
+ uint32_t flags;
+ float32 arg1 = make_float32(r1);
+ float32 arg2 = make_float32(r2);
+ float32 arg3 = make_float32(r3);
+ float32 f_result;
+
+ f_result = float32_muladd(arg1, arg2, arg3, float_muladd_negate_product,
+ &env->fp_status);
+
+ flags = f_get_excp_flags(env);
+ if (flags) {
+ if (flags & float_flag_invalid) {
+ arg1 = float32_squash_input_denormal(arg1, &env->fp_status);
+ arg2 = float32_squash_input_denormal(arg2, &env->fp_status);
+ arg3 = float32_squash_input_denormal(arg3, &env->fp_status);
+
+ f_result = f_maddsub_nan_result(arg1, arg2, arg3, f_result, 1);
+ }
+ f_update_psw_flags(env, flags);
+ } else {
+ env->FPU_FS = 0;
+ }
+ return (uint32_t)f_result;
+}
+
uint32_t helper_fcmp(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
{
uint32_t result, flags;
@@ -109,6 +109,8 @@ DEF_HELPER_3(fadd, i32, env, i32, i32)
DEF_HELPER_3(fsub, i32, env, i32, i32)
DEF_HELPER_3(fmul, i32, env, i32, i32)
DEF_HELPER_3(fdiv, i32, env, i32, i32)
+DEF_HELPER_4(fmadd, i32, env, i32, i32, i32)
+DEF_HELPER_4(fmsub, i32, env, i32, i32, i32)
DEF_HELPER_3(fcmp, i32, env, i32, i32)
DEF_HELPER_2(ftoi, i32, env, i32)
DEF_HELPER_2(itof, i32, env, i32)
@@ -7096,6 +7096,14 @@ static void decode_rrr_divide(CPUTriCoreState *env, DisasContext *ctx)
case OPC2_32_RRR_SUB_F:
gen_helper_fsub(cpu_gpr_d[r4], cpu_env, cpu_gpr_d[r1], cpu_gpr_d[r3]);
break;
+ case OPC2_32_RRR_MADD_F:
+ gen_helper_fmadd(cpu_gpr_d[r4], cpu_env, cpu_gpr_d[r1],
+ cpu_gpr_d[r2], cpu_gpr_d[r3]);
+ break;
+ case OPC2_32_RRR_MSUB_F:
+ gen_helper_fmsub(cpu_gpr_d[r4], cpu_env, cpu_gpr_d[r1],
+ cpu_gpr_d[r2], cpu_gpr_d[r3]);
+ break;
default:
generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
}
Multiplies D[a] and D[b] and adds/subtracts the result to/from D[d]. The result is put in D[c]. All operands are floating-point numbers. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> --- v2 -> v3: - f_maddsub_nan_result() now gets a boolean value indicating whether the muladd_negate_c flag is set target-tricore/fpu_helper.c | 93 ++++++++++++++++++++++++++++++++++++++++++++- target-tricore/helper.h | 2 + target-tricore/translate.c | 8 ++++ 3 files changed, 102 insertions(+), 1 deletion(-)