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target/arm/vfp_helper: Extract vfp_set_fpscr_from_host()

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The vfp_set_fpscr() helper contains code specific to the host
floating point implementation (here the SoftFloat library).
Extract this code to vfp_set_fpscr_from_host().

Backports commit 0c6ad94809b37a1f0f1f75d3cd0e4a24fb77e65c from qemu
This commit is contained in:
Philippe Mathieu-Daudé 2019-08-08 15:28:35 -04:00 committed by Lioncash
parent 2b5d731f56
commit 4e214e5d64
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 13 additions and 6 deletions
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19
qemu/target/arm/vfp_helper.c
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@ -83,6 +83,18 @@ static inline int vfp_exceptbits_to_host(int target_bits)
return host_bits; return host_bits;
} }
static uint32_t vfp_get_fpscr_from_host(CPUARMState *env)
{
uint32_t i;
i = get_float_exception_flags(&env->vfp.fp_status);
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
/* FZ16 does not generate an input denormal exception. */
i |= (get_float_exception_flags(&env->vfp.fp_status_f16)
& ~float_flag_input_denormal);
return vfp_exceptbits_from_host(i);
}
static void vfp_set_fpscr_to_host(CPUARMState *env, uint32_t val) static void vfp_set_fpscr_to_host(CPUARMState *env, uint32_t val)
{ {
int i; int i;
@ -143,12 +155,7 @@ uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
| (env->vfp.vec_len << 16) | (env->vfp.vec_len << 16)
| (env->vfp.vec_stride << 20); | (env->vfp.vec_stride << 20);
i = get_float_exception_flags(&env->vfp.fp_status); fpscr |= vfp_get_fpscr_from_host(env);
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
/* FZ16 does not generate an input denormal exception. */
i |= (get_float_exception_flags(&env->vfp.fp_status_f16)
& ~float_flag_input_denormal);
fpscr |= vfp_exceptbits_from_host(i);
i = env->vfp.qc[0] | env->vfp.qc[1] | env->vfp.qc[2] | env->vfp.qc[3]; i = env->vfp.qc[0] | env->vfp.qc[1] | env->vfp.qc[2] | env->vfp.qc[3];
fpscr |= i ? FPCR_QC : 0; fpscr |= i ? FPCR_QC : 0;