[RISCV] Minor improvements to RISCVInstrInfoXSf.td. NFC

[topperc]

Use an explicit list of LMULInfos instead of indexing part of other lists. Use wvrclass field to double LMUL instead of using two lists.

Use range instead of list in another spot. I wish I could use a list of LMULInfo here but there's no way to quadruple an LMUL yet.

[llvmbot]

@llvm/pr-subscribers-backend-risc-v

Author: Craig Topper (topperc)

Changes

Use an explicit list of LMULInfos instead of indexing part of other lists. Use wvrclass field to double LMUL instead of using two lists.

Use range instead of list in another spot. I wish I could use a list of LMULInfo here but there's no way to quadruple an LMUL yet.

---

Full diff: https://github.com/llvm/llvm-project/pull/76424.diff

1 Files Affected:

• (modified) llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td (+4-5)

diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td b/llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td
index 38d05877bb45c1..561ab8d7403d67 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td
@@ -356,10 +356,9 @@ multiclass VPseudoSiFiveVQMACCDOD<string Constraint = ""> {
 }
 
 multiclass VPseudoSiFiveVQMACCQOQ<string Constraint = ""> {
-  foreach i = 0-3 in
-    let VLMul = MxListVF4[i].value in
-    defm NAME : VPseudoSiFiveVMACC<MxListVF4[i].MX, MxListVF8[i].vrclass,
-                                   MxListVF4[i].vrclass, Constraint>;
+  foreach m = [V_MF2, V_M1, V_M2, V_M4] in
+    let VLMul = m.value in
+    defm NAME : VPseudoSiFiveVMACC<m.MX, m.wvrclass, m.vrclass, Constraint>;
 }
 
 multiclass VPseudoSiFiveVFWMACC<string Constraint = ""> {
@@ -369,7 +368,7 @@ multiclass VPseudoSiFiveVFWMACC<string Constraint = ""> {
 }
 
 multiclass VPseudoSiFiveVFNRCLIP<string Constraint = "@earlyclobber $rd"> {
-  foreach i = [0, 1, 2, 3, 4] in
+  foreach i = 0-4 in
     let hasSideEffects = 0 in
       defm "Pseudo" # NAME : VPseudoBinaryRoundingMode<MxListW[i].vrclass,
                                                        MxListVF4[i].vrclass,

[4vtomat]

LGTM, thanks~

[wangpc-pp]

LGTM.