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[Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction
From: |
Bastian Koppelmann |
Subject: |
[Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction |
Date: |
Mon, 7 Nov 2016 15:44:41 +0100 |
Converts a 32-bit floating point number to an unsigned int. The
result is rounded towards zero.
Signed-off-by: Bastian Koppelmann <address@hidden>
---
v1 -> v2:
- ftouz: Correctly convert the result from uint32 to f32
target-tricore/fpu_helper.c | 43 +++++++++++++++++++++++++++++++++++++++++++
target-tricore/helper.h | 1 +
target-tricore/translate.c | 3 +++
3 files changed, 47 insertions(+)
diff --git a/target-tricore/fpu_helper.c b/target-tricore/fpu_helper.c
index 98fe947..f717b53 100644
--- a/target-tricore/fpu_helper.c
+++ b/target-tricore/fpu_helper.c
@@ -215,3 +215,46 @@ uint32_t helper_itof(CPUTriCoreState *env, uint32_t arg)
}
return (uint32_t)f_result;
}
+
+uint32_t helper_ftouz(CPUTriCoreState *env, uint32_t arg)
+{
+ float32 f_arg = make_float32(arg);
+ uint32_t result;
+ int32_t flags;
+ result = float32_to_uint32_round_to_zero(f_arg, &env->fp_status);
+
+ flags = f_get_excp_flags(env);
+ if (flags) {
+ if (float32_is_any_nan(f_arg)) {
+ flags |= float_flag_invalid;
+ result = 0;
+ /* f_real(D[a]) < 0.0 */
+ } else if (float32_lt_quiet(f_arg, 0.0, &env->fp_status)) {
+ flags |= float_flag_invalid;
+ result = 0;
+ /* f_real(D[a]) > 2^32 -1 */
+ } else if (float32_lt_quiet(0x4f800000, f_arg, &env->fp_status)) {
+ flags |= float_flag_invalid;
+ result = 0xffffffff;
+ } else {
+ flags &= ~float_flag_invalid;
+ }
+ /* once invalid flag has been set, we cannot set inexact anymore
+ since each FPU operation can only assert ONE flag. (see
+ TriCore ISA Manual Vol. 1 (11-9)) */
+ if (!(flags & float_flag_invalid)) {
+ if (!float32_eq(f_arg, uint32_to_float32(result, &env->fp_status),
+ &env->fp_status)) {
+ flags |= float_flag_inexact;
+ } else {
+ flags &= ~float_flag_inexact;
+ }
+ } else {
+ flags &= ~float_flag_inexact;
+ }
+ f_update_psw_flags(env, flags);
+ } else {
+ env->FPU_FS = 0;
+ }
+ return result;
+}
diff --git a/target-tricore/helper.h b/target-tricore/helper.h
index 9333e16..467c880 100644
--- a/target-tricore/helper.h
+++ b/target-tricore/helper.h
@@ -112,6 +112,7 @@ DEF_HELPER_3(fdiv, i32, env, i32, i32)
DEF_HELPER_3(fcmp, i32, env, i32, i32)
DEF_HELPER_2(ftoi, i32, env, i32)
DEF_HELPER_2(itof, i32, env, i32)
+DEF_HELPER_2(ftouz, i32, env, i32)
/* dvinit */
DEF_HELPER_3(dvinit_b_13, i64, env, i32, i32)
DEF_HELPER_3(dvinit_b_131, i64, env, i32, i32)
diff --git a/target-tricore/translate.c b/target-tricore/translate.c
index 9a50df9..27c6d31 100644
--- a/target-tricore/translate.c
+++ b/target-tricore/translate.c
@@ -6698,6 +6698,9 @@ static void decode_rr_divide(CPUTriCoreState *env,
DisasContext *ctx)
case OPC2_32_RR_ITOF:
gen_helper_itof(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
break;
+ case OPC2_32_RR_FTOUZ:
+ gen_helper_ftouz(cpu_gpr_d[r3], cpu_env, cpu_gpr_d[r1]);
+ break;
default:
generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
}
--
2.10.2
- [Qemu-devel] [PATCH v2 0/5], Bastian Koppelmann, 2016/11/07
- [Qemu-devel] [PATCH v2 3/5] target-tricore: Added new MOV instruction variant, Bastian Koppelmann, 2016/11/07
- [Qemu-devel] [PATCH v2 5/5] target-tricore: Add updfl instruction, Bastian Koppelmann, 2016/11/07
- [Qemu-devel] [PATCH v2 4/5] target-tricore: Added new JNE instruction variant, Bastian Koppelmann, 2016/11/07
- [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction,
Bastian Koppelmann <=
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Richard Henderson, 2016/11/08
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Bastian Koppelmann, 2016/11/08
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Richard Henderson, 2016/11/08
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Bastian Koppelmann, 2016/11/08
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Richard Henderson, 2016/11/08
- Re: [Qemu-devel] [PATCH v2 1/5] target-tricore: Added FTOUZ instruction, Bastian Koppelmann, 2016/11/09
[Qemu-devel] [PATCH v2 2/5] target-tricore: Added MADD.F and MSUB.F instructions, Bastian Koppelmann, 2016/11/07