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authorMarcelo Tosatti <mtosatti@redhat.com>2012-10-11 05:00:35 -0300
committerMarcelo Tosatti <mtosatti@redhat.com>2012-10-11 05:00:35 -0300
commit6b852ae04e3aa1adfeac5a62d6ab71870bcc7c5d (patch)
treecdf94fdf09a6b4abecff647784d82bc1ad1758c5 /tcg/README
parent8ed1d2756d3347c2b021748d8c272ff650f57dd0 (diff)
parentf430694188293f99a316bfa375b7cc17d23a06ed (diff)
Merge commit 'f430694188293f99a316bfa375b7cc17d23a06ed' into upstream-merge
* commit 'f430694188293f99a316bfa375b7cc17d23a06ed': (248 commits) add pc-1.3 machine type Cleanup unused global var qemu_system_powerdown target-sparc: use notifier for signaling guest system_powerdown command target-arm: use notifier for signaling guest system_powerdown command acpi: use notifier for signaling guest system_powerdown command Introduce powerdown_notifiers tcg/i386: fix build with -march < i686 tcg: Streamline movcond_i64 using movcond_i32 tcg: Streamline movcond_i64 using 32-bit arithmetic tcg: Sanity check goto_tb input tcg: Sanity check deposit inputs tcg: Add tcg_debug_assert tcg: Implement concat*_i64 with deposit_i64 tcg: Emit XORI as NOT for appropriate constants tcg: Optimize initial inputs for ori_i64 tcg: Emit ANDI as EXTU for appropriate constants tcg: Adjust descriptions of *cond opcodes tcg/mips: fix MIPS32(R2) detection block: remove keep_read_only flag from BlockDriverState struct block: convert bdrv_commit() to use bdrv_reopen() ... Conflicts: hw/pc_piix.c Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'tcg/README')
-rw-r--r--tcg/README17
1 files changed, 12 insertions, 5 deletions
diff --git a/tcg/README b/tcg/README
index cfdfd96d0..27846f1ea 100644
--- a/tcg/README
+++ b/tcg/README
@@ -141,7 +141,7 @@ Define label 'label' at the current program point.
Jump to label.
-* brcond_i32/i64 cond, t0, t1, label
+* brcond_i32/i64 t0, t1, cond, label
Conditional jump if t0 cond t1 is true. cond can be:
TCG_COND_EQ
@@ -301,12 +301,18 @@ This operation would be equivalent to
********* Conditional moves
-* setcond_i32/i64 cond, dest, t1, t2
+* setcond_i32/i64 dest, t1, t2, cond
dest = (t1 cond t2)
Set DEST to 1 if (T1 cond T2) is true, otherwise set to 0.
+* movcond_i32/i64 dest, c1, c2, v1, v2, cond
+
+dest = (c1 cond c2 ? v1 : v2)
+
+Set DEST to V1 if (C1 cond C2) is true, otherwise set to V2.
+
********* Type conversions
* ext_i32_i64 t0, t1
@@ -354,7 +360,7 @@ The following opcodes are internal to TCG. Thus they are to be implemented by
32-bit host code generators, but are not to be emitted by guest translators.
They are emitted as needed by inline functions within "tcg-op.h".
-* brcond2_i32 cond, t0_low, t0_high, t1_low, t1_high, label
+* brcond2_i32 t0_low, t0_high, t1_low, t1_high, cond, label
Similar to brcond, except that the 64-bit values T0 and T1
are formed from two 32-bit arguments.
@@ -371,7 +377,7 @@ is returned in two 32-bit outputs.
Similar to mul, except two 32-bit (unsigned) inputs T1 and T2 yielding
the full 64-bit product T0. The later is returned in two 32-bit outputs.
-* setcond2_i32 cond, dest, t1_low, t1_high, t2_low, t2_high
+* setcond2_i32 dest, t1_low, t1_high, t2_low, t2_high, cond
Similar to setcond, except that the 64-bit values T1 and T2 are
formed from two 32-bit arguments. The result is a 32-bit value.
@@ -386,7 +392,8 @@ Exit the current TB and return the value t0 (word type).
Exit the current TB and jump to the TB index 'index' (constant) if the
current TB was linked to this TB. Otherwise execute the next
-instructions.
+instructions. Only indices 0 and 1 are valid and tcg_gen_goto_tb may be issued
+at most once with each slot index per TB.
* qemu_ld8u t0, t1, flags
qemu_ld8s t0, t1, flags