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qemu / qemu / ae14b33de8d329d5497db5446bdc0b0cb6ba756b
commitae14b33de8d329d5497db5446bdc0b0cb6ba756b[log] [tgz]
authorPaolo Bonzini <pbonzini@redhat.com>Thu Jun 20 10:34:28 2024 +0200
committerPaolo Bonzini <pbonzini@redhat.com>Thu Oct 31 18:28:33 2024 +0100
treeee8f830177d04ee80dbbe80b2598669ff501887c
parent1f7f72bdc4faece6af875503a3abe992e87e776b [diff]
target/i386: optimize computation of ZF from CC_OP_DYNAMIC

Most uses of CC_OP_DYNAMIC are for CMP/JB/JE or similar sequences.
We can optimize many of them to avoid computation of the flags.
This eliminates both TCG ops to set up the new cc_op, and helper
instructions because evaluating just ZF is much cheaper.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
3 files changed
tree: ee8f830177d04ee80dbbe80b2598669ff501887c
  1. .github/
  2. .gitlab/
  3. .gitlab-ci.d/
  4. accel/
  5. audio/
  6. authz/
  7. backends/
  8. block/
  9. bsd-user/
  10. chardev/
  11. common-user/
  12. configs/
  13. contrib/
  14. crypto/
  15. disas/
  16. docs/
  17. dump/
  18. ebpf/
  19. fpu/
  20. fsdev/
  21. gdb-xml/
  22. gdbstub/
  23. host/
  24. hw/
  25. include/
  26. io/
  27. libdecnumber/
  28. linux-headers/
  29. linux-user/
  30. migration/
  31. monitor/
  32. nbd/
  33. net/
  34. pc-bios/
  35. plugins/
  36. po/
  37. python/
  38. qapi/
  39. qga/
  40. qobject/
  41. qom/
  42. replay/
  43. roms/
  44. rust/
  45. scripts/
  46. scsi/
  47. semihosting/
  48. stats/
  49. storage-daemon/
  50. stubs/
  51. subprojects/
  52. system/
  53. target/
  54. tcg/
  55. tests/
  56. tools/
  57. trace/
  58. ui/
  59. util/
  60. .dir-locals.el
  61. .editorconfig
  62. .exrc
  63. .gdbinit
  64. .git-blame-ignore-revs
  65. .gitattributes
  66. .gitignore
  67. .gitlab-ci.yml
  68. .gitmodules
  69. .gitpublish
  70. .mailmap
  71. .patchew.yml
  72. .readthedocs.yml
  73. .travis.yml
  74. block.c
  75. blockdev-nbd.c
  76. blockdev.c
  77. blockjob.c
  78. configure
  79. COPYING
  80. COPYING.LIB
  81. cpu-common.c
  82. cpu-target.c
  83. event-loop-base.c
  84. gitdm.config
  85. hmp-commands-info.hx
  86. hmp-commands.hx
  87. iothread.c
  88. job-qmp.c
  89. job.c
  90. Kconfig
  91. Kconfig.host
  92. LICENSE
  93. MAINTAINERS
  94. Makefile
  95. meson.build
  96. meson_options.txt
  97. module-common.c
  98. os-posix.c
  99. os-win32.c
  100. page-target.c
  101. page-vary-common.c
  102. page-vary-target.c
  103. pythondeps.toml
  104. qemu-bridge-helper.c
  105. qemu-edid.c
  106. qemu-img-cmds.hx
  107. qemu-img.c
  108. qemu-io-cmds.c
  109. qemu-io.c
  110. qemu-keymap.c
  111. qemu-nbd.c
  112. qemu-options.hx
  113. qemu.nsi
  114. qemu.sasl
  115. README.rst
  116. replication.c
  117. trace-events
  118. VERSION
  119. version.rc