[clang] [llvm] [AMDGPU] Add support for `v_tanh_bf16` on gfx1250 (PR #147425)

[Shilei Tian via llvm-commits]

================
@@ -2,169 +2,69 @@
 # RUN: llvm-mc -triple=amdgcn -mcpu=gfx1250 -mattr=+real-true16 -disassemble -show-encoding < %s | FileCheck -check-prefixes=GFX1250,GFX1250-REAL16 %s
 # RUN: llvm-mc -triple=amdgcn -mcpu=gfx1250 -mattr=-real-true16 -disassemble -show-encoding < %s | FileCheck -check-prefixes=GFX1250,GFX1250-FAKE16 %s
 
-0x01,0x00,0xed,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, 3                 ; encoding: [0x01,0x00,0xed,0xd5,0x83,0x00,0x00,0x00]
+0xff,0x81,0xca,0xd5,0xff,0x00,0x00,0x38,0x00,0x80,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v255.l, -|0x8000| clamp div:2 ; encoding: [0xff,0x81,0xca,0xd5,0xff,0x00,0x00,0x38,0x00,0x80,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v255, -|0x8000| clamp div:2 ; encoding: [0xff,0x81,0xca,0xd5,0xff,0x00,0x00,0x38,0x00,0x80,0x00,0x00]
 
-0x01,0x10,0xed,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, 3 byte_sel:1      ; encoding: [0x01,0x10,0xed,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0xc1,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, -1                ; encoding: [0x05,0x00,0xca,0xd5,0xc1,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, -1                  ; encoding: [0x05,0x00,0xca,0xd5,0xc1,0x00,0x00,0x00]
 
-0x01,0x08,0xed,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, 3 byte_sel:2      ; encoding: [0x01,0x08,0xed,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0xf0,0x00,0x00,0x08
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, 0.5 mul:2         ; encoding: [0x05,0x00,0xca,0xd5,0xf0,0x00,0x00,0x08]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, 0.5 mul:2           ; encoding: [0x05,0x00,0xca,0xd5,0xf0,0x00,0x00,0x08]
 
-0x01,0x18,0xed,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, 3 byte_sel:3      ; encoding: [0x01,0x18,0xed,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x7f,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, exec_hi           ; encoding: [0x05,0x00,0xca,0xd5,0x7f,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, exec_hi             ; encoding: [0x05,0x00,0xca,0xd5,0x7f,0x00,0x00,0x00]
 
-0x01,0x00,0xed,0xd5,0x03,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, s3                ; encoding: [0x01,0x00,0xed,0xd5,0x03,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x7e,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, exec_lo           ; encoding: [0x05,0x00,0xca,0xd5,0x7e,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, exec_lo             ; encoding: [0x05,0x00,0xca,0xd5,0x7e,0x00,0x00,0x00]
 
-0x01,0x10,0xed,0xd5,0x03,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, s3 byte_sel:1     ; encoding: [0x01,0x10,0xed,0xd5,0x03,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x7d,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, m0                ; encoding: [0x05,0x00,0xca,0xd5,0x7d,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, m0                  ; encoding: [0x05,0x00,0xca,0xd5,0x7d,0x00,0x00,0x00]
 
-0x01,0x08,0xed,0xd5,0x03,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, s3 byte_sel:2     ; encoding: [0x01,0x08,0xed,0xd5,0x03,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x7c,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, null              ; encoding: [0x05,0x00,0xca,0xd5,0x7c,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, null                ; encoding: [0x05,0x00,0xca,0xd5,0x7c,0x00,0x00,0x00]
 
-0x01,0x18,0xed,0xd5,0x03,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, s3 byte_sel:3     ; encoding: [0x01,0x18,0xed,0xd5,0x03,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x01,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, s1                ; encoding: [0x05,0x00,0xca,0xd5,0x01,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, s1                  ; encoding: [0x05,0x00,0xca,0xd5,0x01,0x00,0x00,0x00]
 
-0x01,0x00,0xed,0xd5,0x03,0x01,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, v3                ; encoding: [0x01,0x00,0xed,0xd5,0x03,0x01,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x69,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, s105              ; encoding: [0x05,0x00,0xca,0xd5,0x69,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, s105                ; encoding: [0x05,0x00,0xca,0xd5,0x69,0x00,0x00,0x00]
 
-0x01,0x10,0xed,0xd5,0x03,0x01,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, v3 byte_sel:1     ; encoding: [0x01,0x10,0xed,0xd5,0x03,0x01,0x00,0x00]
+0x05,0x00,0xca,0xd5,0xfd,0x00,0x00,0x10
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, src_scc mul:4     ; encoding: [0x05,0x00,0xca,0xd5,0xfd,0x00,0x00,0x10]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, src_scc mul:4       ; encoding: [0x05,0x00,0xca,0xd5,0xfd,0x00,0x00,0x10]
 
-0x01,0x08,0xed,0xd5,0x03,0x01,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, v3 byte_sel:2     ; encoding: [0x01,0x08,0xed,0xd5,0x03,0x01,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x7b,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, ttmp15            ; encoding: [0x05,0x00,0xca,0xd5,0x7b,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, ttmp15              ; encoding: [0x05,0x00,0xca,0xd5,0x7b,0x00,0x00,0x00]
 
-0x01,0x18,0xed,0xd5,0x03,0x01,0x00,0x00
-# GFX1250: v_cvt_f32_bf8_e64 v1, v3 byte_sel:3     ; encoding: [0x01,0x18,0xed,0xd5,0x03,0x01,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x01,0x01,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, v1.l              ; encoding: [0x05,0x00,0xca,0xd5,0x01,0x01,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, v1                  ; encoding: [0x05,0x00,0xca,0xd5,0x01,0x01,0x00,0x00]
 
-0x01,0x00,0xec,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_fp8_e64 v1, 3                 ; encoding: [0x01,0x00,0xec,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0xff,0x01,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, v255.l            ; encoding: [0x05,0x00,0xca,0xd5,0xff,0x01,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, v255                ; encoding: [0x05,0x00,0xca,0xd5,0xff,0x01,0x00,0x00]
 
-0x01,0x10,0xec,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_fp8_e64 v1, 3 byte_sel:1      ; encoding: [0x01,0x10,0xec,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x6b,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, vcc_hi            ; encoding: [0x05,0x00,0xca,0xd5,0x6b,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, vcc_hi              ; encoding: [0x05,0x00,0xca,0xd5,0x6b,0x00,0x00,0x00]
 
-0x01,0x08,0xec,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_fp8_e64 v1, 3 byte_sel:2      ; encoding: [0x01,0x08,0xec,0xd5,0x83,0x00,0x00,0x00]
+0x05,0x00,0xca,0xd5,0x6a,0x00,0x00,0x00
+# GFX1250-REAL16: v_tanh_bf16_e64 v5.l, vcc_lo            ; encoding: [0x05,0x00,0xca,0xd5,0x6a,0x00,0x00,0x00]
+# GFX1250-FAKE16: v_tanh_bf16_e64 v5, vcc_lo              ; encoding: [0x05,0x00,0xca,0xd5,0x6a,0x00,0x00,0x00]
 
-0x01,0x18,0xec,0xd5,0x83,0x00,0x00,0x00
-# GFX1250: v_cvt_f32_fp8_e64 v1, 3 byte_sel:3      ; encoding: [0x01,0x18,0xec,0xd5,0x83,0x00,0x00,0x00]
-
-0x01,0x00,0xec,0xd5,0x03,0x00,0x00,0x00
----------------
shiltian wrote:

Hmm, I thought I fixed all of them.

https://github.com/llvm/llvm-project/pull/147425