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target-arm queue:

Browse source 
* target/alpha: Don't corrupt error_code with unknown softfloat flags
  * target/arm: Implement FEAT_AFP and FEAT_RPRES
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Merge tag 'pull-target-arm-20250211' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * target/alpha: Don't corrupt error_code with unknown softfloat flags
 * target/arm: Implement FEAT_AFP and FEAT_RPRES

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# gpg: Signature made Tue 11 Feb 2025 11:24:04 EST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20250211' of https://git.linaro.org/people/pmaydell/qemu-arm: (68 commits)
  target/arm: Sink fp_status and fpcr access into do_fmlal*
  target/arm: Read fz16 from env->vfp.fpcr
  target/arm: Simplify DO_VFP_cmp in vfp_helper.c
  target/arm: Simplify fp_status indexing in mve_helper.c
  target/arm: Remove fp_status_a32
  target/arm: Remove fp_status_a64
  target/arm: Remove fp_status_f16_a32
  target/arm: Remove fp_status_f16_a64
  target/arm: Remove ah_fp_status
  target/arm: Remove ah_fp_status_f16
  target/arm: Remove standard_fp_status
  target/arm: Remove standard_fp_status_f16
  target/arm: Introduce CPUARMState.vfp.fp_status[]
  target/arm: Enable FEAT_RPRES for -cpu max
  target/arm: Implement increased precision FRSQRTE
  target/arm: Implement increased precision FRECPE
  target/arm: Plumb FEAT_RPRES frecpe and frsqrte through to new helper
  target/arm: Enable FEAT_AFP for '-cpu max'
  target/arm: Handle FPCR.AH in SVE FMLSLB, FMLSLT (vectors)
  target/arm: Handle FPCR.AH in SVE FMLSL (indexed)
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2025-02-12 08:48:33 -05:00
commit afbcca0ea4
37 changed files with 2325 additions and 709 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/fpu/softfloat-helpers.h
View file

@ -109,6 +109,12 @@ static inline void set_flush_inputs_to_zero(bool val, float_status *status)
status->flush_inputs_to_zero = val;
}
static inline void set_float_ftz_detection(FloatFTZDetection d,
float_status *status)
{
status->ftz_detection = d;
}
static inline void set_default_nan_mode(bool val, float_status *status)
{
status->default_nan_mode = val;
@ -183,4 +189,9 @@ static inline bool get_default_nan_mode(const float_status *status)
return status->default_nan_mode;
}
static inline FloatFTZDetection get_float_ftz_detection(const float_status *status)
{
return status->ftz_detection;
}
#endif /* SOFTFLOAT_HELPERS_H */

25
include/fpu/softfloat-types.h
View file

@ -165,6 +165,13 @@ enum {
float_flag_invalid_sqrt = 0x0800, /* sqrt(-x) */
float_flag_invalid_cvti = 0x1000, /* non-nan to integer */
float_flag_invalid_snan = 0x2000, /* any operand was snan */
/*
* An input was denormal and we used it (without flushing it to zero).
* Not set if we do not actually use the denormal input (e.g.
* because some other input was a NaN, or because the operation
* wasn't actually carried out (divide-by-zero; invalid))
*/
float_flag_input_denormal_used = 0x4000,
};
/*
@ -297,6 +304,22 @@ typedef enum __attribute__((__packed__)) {
float_infzeronan_suppress_invalid = (1 << 7),
} FloatInfZeroNaNRule;
/*
* When flush_to_zero is set, should we detect denormal results to
* be flushed before or after rounding? For most architectures this
* should be set to match the tininess_before_rounding setting,
* but a few architectures, e.g. MIPS MSA, detect FTZ before
* rounding but tininess after rounding.
*
* This enum is arranged so that the default if the target doesn't
* configure it matches the default for tininess_before_rounding
* (i.e. "after rounding").
*/
typedef enum __attribute__((__packed__)) {
float_ftz_after_rounding = 0,
float_ftz_before_rounding = 1,
} FloatFTZDetection;
/*
* Floating Point Status. Individual architectures may maintain
* several versions of float_status for different functions. The
@ -314,6 +337,8 @@ typedef struct float_status {
bool tininess_before_rounding;
/* should denormalised results go to zero and set output_denormal_flushed? */
bool flush_to_zero;
/* do we detect and flush denormal results before or after rounding? */
FloatFTZDetection ftz_detection;
/* should denormalised inputs go to zero and set input_denormal_flushed? */
bool flush_inputs_to_zero;
bool default_nan_mode;