Sandipan Das has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/16615
Change subject: arch-power: Add fixed-point word arithmetic divide extended
instructions
......................................................................
arch-power: Add fixed-point word arithmetic divide extended instructions
This adds the following arithmetic instructions:
* Divide Word Extended (divwe[o][.])
* Divide Word Extended Unsigned (divweu[o][.])
Change-Id: I1b8321de569d1be466e9d84ca5047b0c4682a0e3
Signed-off-by: Sandipan Das <[email protected]>
---
M src/arch/power/isa/decoder.isa
1 file changed, 38 insertions(+), 0 deletions(-)
diff --git a/src/arch/power/isa/decoder.isa b/src/arch/power/isa/decoder.isa
index 059ad53..8c46ac2 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -606,6 +606,44 @@
}
}},
true);
+
+ 427: divwe({{
+ int32_t src1 = Ra_sw;
+ int32_t src2 = Rb_sw;
+ int64_t res;
+ if ((src1 != INT32_MIN || src2 != -1) && src2 != 0) {
+ res = ((int64_t)src1 << 32) / src2;
+ if (res == (int32_t)res) {
+ Rt = (uint32_t)res;
+ } else {
+ Rt = 0;
+ setOV = true;
+ }
+ } else {
+ Rt = 0;
+ setOV = true;
+ }
+ }},
+ true);
+
+ 395: divweu({{
+ uint32_t src1 = Ra_ud;
+ uint32_t src2 = Rb_ud;
+ uint64_t res;
+ if (src2 != 0) {
+ res = ((uint64_t)src1 << 32) / src2;
+ if (res <= UINT32_MAX) {
+ Rt = (uint32_t)res;
+ } else {
+ Rt = 0;
+ setOV = true;
+ }
+ } else {
+ Rt = 0;
+ setOV = true;
+ }
+ }},
+ true);
}
default: decode XFX_XO {
--
To view, visit https://gem5-review.googlesource.com/c/public/gem5/+/16615
To unsubscribe, or for help writing mail filters, visit
https://gem5-review.googlesource.com/settings
Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I1b8321de569d1be466e9d84ca5047b0c4682a0e3
Gerrit-Change-Number: 16615
Gerrit-PatchSet: 1
Gerrit-Owner: Sandipan Das <[email protected]>
Gerrit-MessageType: newchange
_______________________________________________
gem5-dev mailing list
[email protected]
http://m5sim.org/mailman/listinfo/gem5-dev
