diff options
Diffstat (limited to 'src/share/vm/asm/assembler.hpp')
| -rw-r--r-- | src/share/vm/asm/assembler.hpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/share/vm/asm/assembler.hpp b/src/share/vm/asm/assembler.hpp index 829e56184..8db7eef2e 100644 --- a/src/share/vm/asm/assembler.hpp +++ b/src/share/vm/asm/assembler.hpp @@ -257,6 +257,29 @@ class AbstractAssembler : public ResourceObj { // ensure buf contains all code (call this before using/copying the code) void flush(); + // min and max values for signed immediate ranges + static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1)) ; } + static int max_simm(int nbits) { return (intptr_t(1) << (nbits - 1)) - 1; } + + // Define some: + static int min_simm10() { return min_simm(10); } + static int min_simm13() { return min_simm(13); } + static int min_simm16() { return min_simm(16); } + + // Test if x is within signed immediate range for nbits + static bool is_simm(intptr_t x, int nbits) { return min_simm(nbits) <= x && x <= max_simm(nbits); } + + // Define some: + static bool is_simm5( intptr_t x) { return is_simm(x, 5 ); } + static bool is_simm8( intptr_t x) { return is_simm(x, 8 ); } + static bool is_simm10(intptr_t x) { return is_simm(x, 10); } + static bool is_simm11(intptr_t x) { return is_simm(x, 11); } + static bool is_simm12(intptr_t x) { return is_simm(x, 12); } + static bool is_simm13(intptr_t x) { return is_simm(x, 13); } + static bool is_simm16(intptr_t x) { return is_simm(x, 16); } + static bool is_simm26(intptr_t x) { return is_simm(x, 26); } + static bool is_simm32(intptr_t x) { return is_simm(x, 32); } + // Accessors CodeBuffer* code() const; // _code_section->outer() CodeSection* code_section() const { return _code_section; } |