Mercurial > hg > truffle
diff src/cpu/x86/vm/x86_32.ad @ 71:3d62cb85208d
6662967: Optimize I2D conversion on new x86
Summary: Use CVTDQ2PS and CVTDQ2PD for integer values conversions to float and double values on new AMD cpu.
Reviewed-by: sgoldman, never
| author | kvn |
|---|---|
| date | Wed, 19 Mar 2008 15:33:25 -0700 |
| parents | a61af66fc99e |
| children | ba764ed4b6f2 |
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--- a/src/cpu/x86/vm/x86_32.ad Wed Mar 19 15:14:36 2008 -0700 +++ b/src/cpu/x86/vm/x86_32.ad Wed Mar 19 15:33:25 2008 -0700 @@ -10970,7 +10970,7 @@ %} instruct convI2XD_reg(regXD dst, eRegI src) %{ - predicate( UseSSE>=2 ); + predicate( UseSSE>=2 && !UseXmmI2D ); match(Set dst (ConvI2D src)); format %{ "CVTSI2SD $dst,$src" %} opcode(0xF2, 0x0F, 0x2A); @@ -10987,6 +10987,20 @@ ins_pipe( pipe_slow ); %} +instruct convXI2XD_reg(regXD dst, eRegI src) +%{ + predicate( UseSSE>=2 && UseXmmI2D ); + match(Set dst (ConvI2D src)); + + format %{ "MOVD $dst,$src\n\t" + "CVTDQ2PD $dst,$dst\t# i2d" %} + ins_encode %{ + __ movd($dst$$XMMRegister, $src$$Register); + __ cvtdq2pd($dst$$XMMRegister, $dst$$XMMRegister); + %} + ins_pipe(pipe_slow); // XXX +%} + instruct convI2D_mem(regD dst, memory mem) %{ predicate( UseSSE<=1 && !Compile::current()->select_24_bit_instr()); match(Set dst (ConvI2D (LoadI mem))); @@ -11062,7 +11076,7 @@ // Convert an int to a float in xmm; no rounding step needed. instruct convI2X_reg(regX dst, eRegI src) %{ - predicate(UseSSE>=1); + predicate( UseSSE==1 || UseSSE>=2 && !UseXmmI2F ); match(Set dst (ConvI2F src)); format %{ "CVTSI2SS $dst, $src" %} @@ -11071,6 +11085,20 @@ ins_pipe( pipe_slow ); %} + instruct convXI2X_reg(regX dst, eRegI src) +%{ + predicate( UseSSE>=2 && UseXmmI2F ); + match(Set dst (ConvI2F src)); + + format %{ "MOVD $dst,$src\n\t" + "CVTDQ2PS $dst,$dst\t# i2f" %} + ins_encode %{ + __ movd($dst$$XMMRegister, $src$$Register); + __ cvtdq2ps($dst$$XMMRegister, $dst$$XMMRegister); + %} + ins_pipe(pipe_slow); // XXX +%} + instruct convI2L_reg( eRegL dst, eRegI src, eFlagsReg cr) %{ match(Set dst (ConvI2L src)); effect(KILL cr);