openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

target-arm: Signal InputDenormal for VRECPE, VRSQRTE, VRECPS, VRSQRTS 

The helpers for VRECPE.F32, VSQRTE.F32, VRECPS and VRSQRTS handle denormals
as special cases, so we must set the InputDenormal exception flag ourselves.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-05-19 14:46:15 +01:00 committed by Aurelien Jarno
parent 1146a817c1
commit 43fe9bdb0f
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
target-arm/helper.c
View File

@ -2720,6 +2720,9 @@ float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env)
float_status *s = &env->vfp.standard_fp_status; float_status *s = &env->vfp.standard_fp_status;
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
if (!(float32_is_zero(a) || float32_is_zero(b))) {
float_raise(float_flag_input_denormal, s);
}
return float32_two; return float32_two;
} }
return float32_sub(float32_two, float32_mul(a, b, s), s); return float32_sub(float32_two, float32_mul(a, b, s), s);
@ -2731,6 +2734,9 @@ float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env)
float32 product; float32 product;
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
if (!(float32_is_zero(a) || float32_is_zero(b))) {
float_raise(float_flag_input_denormal, s);
}
return float32_one_point_five; return float32_one_point_five;
} }
product = float32_mul(a, b, s); product = float32_mul(a, b, s);
@ -2791,6 +2797,9 @@ float32 HELPER(recpe_f32)(float32 a, CPUState *env)
} else if (float32_is_infinity(a)) { } else if (float32_is_infinity(a)) {
return float32_set_sign(float32_zero, float32_is_neg(a)); return float32_set_sign(float32_zero, float32_is_neg(a));
} else if (float32_is_zero_or_denormal(a)) { } else if (float32_is_zero_or_denormal(a)) {
if (!float32_is_zero(a)) {
float_raise(float_flag_input_denormal, s);
}
float_raise(float_flag_divbyzero, s); float_raise(float_flag_divbyzero, s);
return float32_set_sign(float32_infinity, float32_is_neg(a)); return float32_set_sign(float32_infinity, float32_is_neg(a));
} else if (a_exp >= 253) { } else if (a_exp >= 253) {
@ -2882,6 +2891,9 @@ float32 HELPER(rsqrte_f32)(float32 a, CPUState *env)
} }
return float32_default_nan; return float32_default_nan;
} else if (float32_is_zero_or_denormal(a)) { } else if (float32_is_zero_or_denormal(a)) {
if (!float32_is_zero(a)) {
float_raise(float_flag_input_denormal, s);
}
float_raise(float_flag_divbyzero, s); float_raise(float_flag_divbyzero, s);
return float32_set_sign(float32_infinity, float32_is_neg(a)); return float32_set_sign(float32_infinity, float32_is_neg(a));
} else if (float32_is_neg(a)) { } else if (float32_is_neg(a)) {