Yasm Assembler mainline development tree (ffmpeg 依赖)

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Tag: Branch: Tree: 0ea57bf7bf

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yasm/modules/arch/x86

History

Peter Johnson aa3e6ff9b9 Change some optimization settings so that imm8 optimizations actually get ... triggered for more cases and optimize from 64-bit down to 32-bit for 64-bit mov instructions. This change means that mov reg64, constant will be auto-sized up to 64 bits, but mov reg64, expr/symbol will default to 32 bits. You must use mov reg64, qword expr/symbol if you need 64 bits, or in GAS mode use movabsq expr/symbol, reg64. This makes the generated code smaller and default most usages into 32-bit relocations appropriate for ELF64 and Win64. Right now, 32-bit unsigned relocs are generated instead of 32-bit signed; this will need to be fixed. * x86arch.h (x86_insn.postop): Add X86_POSTOP_SIGNEXT_IMM32. * x86bc.c (x86_bc_insn_resolve): Implement. * x86id.re (OPAP_SImm32Avail): New flag. (MOD_Op2AddSp): New modifier to encode spare directly into 2nd opcode byte. (arith_insn): Use MOD_Op2AddSp and add forced-size override forms. (mov_insn): Use OPAP_SImm32Avail and add forced-size override form. (yasm_x86__finalize_insn): Implement new flag and modifier. Fix up testcases for changes. svn path=/trunk/yasm/; revision=1314		19 years ago
..
tests	Change some optimization settings so that imm8 optimizations actually get	19 years ago
Makefile.inc	Continue re2c updates. This one gets rid of the unused label warnings.	19 years ago
x86arch.c	Implement align and org bytecodes. While we're here, implement .zero	19 years ago
x86arch.h	Change some optimization settings so that imm8 optimizations actually get	19 years ago
x86bc.c	Change some optimization settings so that imm8 optimizations actually get	19 years ago
x86expr.c	* x86expr.c (yasm_x86__expr_checkea): Add address16_op parameter to avoid	19 years ago
x86id.re	Change some optimization settings so that imm8 optimizations actually get	19 years ago