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comparison src/cpu/x86/vm/x86_32.ad @ 2401:7e88bdae86ec

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7029017: Additional architecture support for c2 compiler Summary: Enables cross building of a c2 VM. Support masking of shift counts when the processor architecture mandates it. Reviewed-by: kvn, never
author roland
date Fri, 25 Mar 2011 09:35:39 +0100
parents 41d4973cf100
children 15c9a0e16269
comparison
equal deleted inserted replaced
2399:b2949bf39900 2401:7e88bdae86ec
1390 1390
1391 // Should the Matcher clone shifts on addressing modes, expecting them to 1391 // Should the Matcher clone shifts on addressing modes, expecting them to
1392 // be subsumed into complex addressing expressions or compute them into 1392 // be subsumed into complex addressing expressions or compute them into
1393 // registers? True for Intel but false for most RISCs 1393 // registers? True for Intel but false for most RISCs
1394 const bool Matcher::clone_shift_expressions = true; 1394 const bool Matcher::clone_shift_expressions = true;
1395
1396 // Do we need to mask the count passed to shift instructions or does
1397 // the cpu only look at the lower 5/6 bits anyway?
1398 const bool Matcher::need_masked_shift_count = false;
1395 1399
1396 bool Matcher::narrow_oop_use_complex_address() { 1400 bool Matcher::narrow_oop_use_complex_address() {
1397 ShouldNotCallThis(); 1401 ShouldNotCallThis();
1398 return true; 1402 return true;
1399 } 1403 }