ref: b0a059537147237e868b4a8f07922ae8a349e55c
dir: /sys/src/cmd/9c/machcap.c/
#include "gc.h" int machcap(Node *n) { if(n == Z) return 1; /* test */ switch(n->op) { case OMUL: case OLMUL: case OASMUL: case OASLMUL: if(typechlv[n->type->etype]) return 1; break; case OADD: case OAND: case OOR: case OSUB: case OXOR: case OASHL: case OLSHR: case OASHR: if(typechlv[n->left->type->etype]) return 1; break; case OCAST: return 1; case OCOND: case OCOMMA: case OLIST: case OANDAND: case OOROR: case ONOT: return 1; case OASADD: case OASSUB: case OASAND: case OASOR: case OASXOR: return 1; case OASASHL: case OASASHR: case OASLSHR: return 1; case OPOSTINC: case OPOSTDEC: case OPREINC: case OPREDEC: return 1; case OEQ: case ONE: case OLE: case OGT: case OLT: case OGE: case OHI: case OHS: case OLO: case OLS: return 1; case ONEG: case OCOM: break; } return 0; }