Add generic and ARM specific support for half-precision IEEE 754 floating point numbe...

[deliverable/binutils-gdb.git] / gas / ChangeLog

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+2019-08-12  Barnaby Wilks  <barnaby.wilks@arm.com>
+
+       * config/tc-arm.c (enum fp_16bit_format): Add enum to represent the 2 float16 encodings.
+       (md_atof): Set precision for float16 type.
+       (arm_is_largest_exponent_ok): Check for whether to encode with the IEEE or alternative
+       format.
+       (set_fp16_format): Parse a float16_format directive.
+       (arm_parse_fp16_opt): Parse the fp16-format command line option.
+       (aeabi_set_public_attributes): For ELF encode the FP16 format EABI attribute.
+       * config/tc-arm.h (TC_LARGEST_EXPONENT_IS_NORMAL): Macro that expands to
+       arm_is_largest_exponent_ok.
+       (arm_is_largest_exponent_ok): Add prototype for arm_is_largest_exponent_ok function.
+       * doc/c-arm.texi: Add documentation for .float16, .float16_format and -mfp16-format=
+       * testsuite/gas/arm/float16-bad.d: New test.
+       * testsuite/gas/arm/float16-bad.l: New test.
+       * testsuite/gas/arm/float16-bad.s: New test.
+       * testsuite/gas/arm/float16-be.d: New test.
+       * testsuite/gas/arm/float16-format-bad.d: New test.
+       * testsuite/gas/arm/float16-format-bad.l: New test.
+       * testsuite/gas/arm/float16-format-bad.s: New test.
+       * testsuite/gas/arm/float16-format-opt-bad.d: New test.
+       * testsuite/gas/arm/float16-format-opt-bad.l: New test.
+       * testsuite/gas/arm/float16-le.d: New test.
+       * testsuite/gas/arm/float16.s: New test.
+       * testsuite/gas/arm/float16-eabi-alternative-format.d: New test.
+       * testsuite/gas/arm/float16-eabi-ieee-format.d: New test.
+       * testsuite/gas/arm/float16-eabi-no-format.d: New test.
+       * testsuite/gas/arm/float16-eabi.s: New test.
+
+2019-08-12  Barnaby Wilks  <barnaby.wilks@arm.com>
+
+       * config/atof-ieee.c (H_PRECISION): Macro for precision of float16
+       type.
+       (atof_ieee): Set precision and exponent bits for encoding float16
+       types.
+       (gen_to_words): NaN and Infinity encoding for float16.
+       (ieee_md_atof): Set precision for encoding float16 type.
+
 2019-08-12  Alan Modra  <amodra@gmail.com>
 
        PR 24851