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6 Commits (36130f1db351eec8bf19b00f4e2f9dd92276810b)

Author SHA1 Message Date
Paul Mackerras 36130f1db3 tests/fpu: Add tests for frsp 
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago
Paul Mackerras 9e8fb293ed FPU: Implement floating convert from integer instructions 
This implements fcfid, fcfidu, fcfids and fcfidus, which convert
64-bit integer values in an FPR into a floating-point value.
This brings in a lot of the datapath that will be needed in
future, including the shifter, adder, mask generator and
count-leading-zeroes logic, along with the machinery for rounding
to single-precision or double-precision, detecting inexact results,
signalling inexact-result exceptions, and updating result flags
in the FPSCR.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago
Paul Mackerras b628af6176 FPU: Implement fmr and related instructions 
This implements fmr, fneg, fabs, fnabs and fcpsgn and adds tests
for them.

This adds logic to unpack and repack floating-point data from the
64-bit packed form (as stored in memory and the register file) into
the unpacked form in the fpr_reg_type record.  This is not strictly
necessary for fmr et al., but will be useful for when we do actual
arithmetic.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago
Paul Mackerras bf1d9e9531 tests/fpu: Add tests for basic FPSCR function and interrupt generation 
This tests mffs, mtfsf and the generation of floating-point type
program interrupts that occur as a result of mtfsf.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago
Paul Mackerras 76ec1a2f0a tests/fpu: Add tests for lfs and stfs instructions 
This exercises the single-to-double and double-to-single conversions,
including denormalized cases.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago
Paul Mackerras bcac4b9b2f tests: Add a test for FP loads and stores 
This tests that floating-point unavailable exceptions occur as expected
on FP loads and stores, and that the simple FP loads and stores appear
to give reasonable results.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 4 years ago