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2007-08-09 Sandra Loosemore <sandra@codesourcery.com> Nigel Stephens <nigel@mips.com> gcc/ * doc/tm.texi (CLZ_DEFINED_VALUE_AT_ZERO, CTZ_DEFINED_VALUE_AT_ZERO): Document change in interpretation of value from boolean to tri-state integer. * optabs.c (expand_ffs, expand_ctz): New functions to compute ffs and ctz using clz. (expand_unop): Call them. * config/rs6000/rs6000.h (CLZ_DEFINED_VALUE_AT_ZERO): Fix its result value. (CTZ_DEFINED_VALUE_AT_ZERO): Likewise. * config/mips/mips.h (CLZ_DEFINED_VALUE_AT_ZERO): Likewise, to enable the new ffs expansion on this target. Co-Authored-By: Nigel Stephens <nigel@mips.com> From-SVN: r127318
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